YAFFS2 import

Direct import of yaffs as a tarball as of 20071113 from their public
CVS-web at http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs2/

The code can also be imported on the command line with:
export CVSROOT=:pserver:anonymous@cvs.aleph1.co.uk:/home/aleph1/cvs cvs logon
(Hit return when asked for a password)
cvs checkout yaffs2

Signed-off-by: William Juul <william.juul@tandberg.com>
Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>

1 files changed, 229 insertions, 0 deletions

diff --git a/fs/yaffs2/direct/yaffscfg2k.c b/fs/yaffs2/direct/yaffscfg2k.c
new file mode 100644
index 0000000..6d5f542
--- /dev/null
+++ b/fs/yaffs2/direct/yaffscfg2k.c
@@ -0,0 +1,229 @@
+/*
+ * 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.
+ */
+
+/*
+ * yaffscfg2k.c  The configuration for the "direct" use of yaffs.
+ *
+ * This file is intended to be modified to your requirements.
+ * There is no need to redistribute this file.
+ */
+
+#include "yaffscfg.h"
+#include "yaffsfs.h"
+#include "yaffs_fileem2k.h"
+#include "yaffs_nandemul2k.h"
+
+#include <errno.h>
+
+unsigned yaffs_traceMask = 
+
+	YAFFS_TRACE_SCAN |  
+	YAFFS_TRACE_GC | YAFFS_TRACE_GC_DETAIL | 
+	YAFFS_TRACE_ERASE | 
+	YAFFS_TRACE_TRACING | 
+	YAFFS_TRACE_ALLOCATE | 
+	YAFFS_TRACE_CHECKPOINT |
+	YAFFS_TRACE_BAD_BLOCKS |
+	YAFFS_TRACE_VERIFY |
+	YAFFS_TRACE_VERIFY_NAND |
+	YAFFS_TRACE_VERIFY_FULL |
+//	(~0) |
+	
+	0;
+        
+
+
+void yaffsfs_SetError(int err)
+{
+	//Do whatever to set error
+	errno = err;
+}
+
+void yaffsfs_Lock(void)
+{
+}
+
+void yaffsfs_Unlock(void)
+{
+}
+
+__u32 yaffsfs_CurrentTime(void)
+{
+	return 0;
+}
+
+
+static int yaffs_kill_alloc = 0;
+static size_t total_malloced = 0;
+static size_t malloc_limit = 0 & 6000000;
+
+void *yaffs_malloc(size_t size)
+{
+	size_t this;
+	if(yaffs_kill_alloc)
+		return NULL;
+	if(malloc_limit && malloc_limit <(total_malloced + size) )
+		return NULL;
+
+	this = malloc(size);
+	if(this)
+		total_malloced += size;
+	return this;
+}
+
+void yaffs_free(void *ptr)
+{
+	free(ptr);
+}
+
+void yaffsfs_LocalInitialisation(void)
+{
+	// Define locking semaphore.
+}
+
+// Configuration for:
+// /ram  2MB ramdisk
+// /boot 2MB boot disk (flash)
+// /flash 14MB flash disk (flash)
+// NB Though /boot and /flash occupy the same physical device they
+// are still disticnt "yaffs_Devices. You may think of these as "partitions"
+// using non-overlapping areas in the same device.
+// 
+
+#include "yaffs_ramdisk.h"
+#include "yaffs_flashif.h"
+#include "yaffs_nandemul2k.h"
+
+static yaffs_Device ramDev;
+static yaffs_Device bootDev;
+static yaffs_Device flashDev;
+static yaffs_Device ram2kDev;
+
+static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
+#if 0
+	{ "/ram", &ramDev},
+	{ "/boot", &bootDev},
+	{ "/flash/", &flashDev},
+	{ "/ram2k", &ram2kDev},
+	{(void *)0,(void *)0}
+#else
+	{ "/", &ramDev},
+	{ "/flash/boot", &bootDev},
+	{ "/flash/flash", &flashDev},
+	{ "/ram2k", &ram2kDev},
+	{(void *)0,(void *)0} /* Null entry to terminate list */
+#endif
+};
+
+
+int yaffs_StartUp(void)
+{
+	// Stuff to configure YAFFS
+	// Stuff to initialise anything special (eg lock semaphore).
+	yaffsfs_LocalInitialisation();
+	
+	// Set up devices
+	// /ram
+	memset(&ramDev,0,sizeof(ramDev));
+	ramDev.nDataBytesPerChunk = 512;
+	ramDev.nChunksPerBlock = 32;
+	ramDev.nReservedBlocks = 2; // Set this smaller for RAM
+	ramDev.startBlock = 0; // Can use block 0
+	ramDev.endBlock = 127; // Last block in 2MB.	
+	//ramDev.useNANDECC = 1;
+	ramDev.nShortOpCaches = 0;	// Disable caching on this device.
+	ramDev.genericDevice = (void *) 0;	// Used to identify the device in fstat.
+	ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
+	ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
+	ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
+	ramDev.initialiseNAND = yramdisk_InitialiseNAND;
+
+	// /boot
+	memset(&bootDev,0,sizeof(bootDev));
+	bootDev.nDataBytesPerChunk = 512;
+	bootDev.nChunksPerBlock = 32;
+	bootDev.nReservedBlocks = 5;
+	bootDev.startBlock = 0; // Can use block 0
+	bootDev.endBlock = 63; // Last block
+	//bootDev.useNANDECC = 0; // use YAFFS's ECC
+	bootDev.nShortOpCaches = 10; // Use caches
+	bootDev.genericDevice = (void *) 1;	// Used to identify the device in fstat.
+	bootDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
+	bootDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
+	bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
+	bootDev.initialiseNAND = yflash_InitialiseNAND;
+	bootDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
+	bootDev.queryNANDBlock = yflash_QueryNANDBlock;
+
+
+
+	// /flash
+	// Set this puppy up to use
+	// the file emulation space as
+	// 2kpage/64chunk per block/128MB device
+	memset(&flashDev,0,sizeof(flashDev));
+
+	flashDev.nDataBytesPerChunk = 2048;
+	flashDev.nChunksPerBlock = 64;
+	flashDev.nReservedBlocks = 5;
+	flashDev.nCheckpointReservedBlocks = 5;
+	//flashDev.checkpointStartBlock = 1;
+	//flashDev.checkpointEndBlock = 20;
+	flashDev.startBlock = 0;
+	flashDev.endBlock = 200; // Make it smaller
+	//flashDev.endBlock = yflash_GetNumberOfBlocks()-1;
+	flashDev.isYaffs2 = 1;
+	flashDev.wideTnodesDisabled=0;
+	flashDev.nShortOpCaches = 10; // Use caches
+	flashDev.genericDevice = (void *) 2;	// Used to identify the device in fstat.
+	flashDev.writeChunkWithTagsToNAND = yflash_WriteChunkWithTagsToNAND;
+	flashDev.readChunkWithTagsFromNAND = yflash_ReadChunkWithTagsFromNAND;
+	flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
+	flashDev.initialiseNAND = yflash_InitialiseNAND;
+	flashDev.markNANDBlockBad = yflash_MarkNANDBlockBad;
+	flashDev.queryNANDBlock = yflash_QueryNANDBlock;
+
+	// /ram2k
+	// Set this puppy up to use
+	// the file emulation space as
+	// 2kpage/64chunk per block/128MB device
+	memset(&ram2kDev,0,sizeof(ram2kDev));
+
+	ram2kDev.nDataBytesPerChunk = nandemul2k_GetBytesPerChunk();
+	ram2kDev.nChunksPerBlock = nandemul2k_GetChunksPerBlock();
+	ram2kDev.nReservedBlocks = 5;
+	ram2kDev.startBlock = 0; // First block after /boot
+	//ram2kDev.endBlock = 127; // Last block in 16MB
+	ram2kDev.endBlock = nandemul2k_GetNumberOfBlocks() - 1; // Last block in 512MB
+	ram2kDev.isYaffs2 = 1;
+	ram2kDev.nShortOpCaches = 10; // Use caches
+	ram2kDev.genericDevice = (void *) 3;	// Used to identify the device in fstat.
+	ram2kDev.writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
+	ram2kDev.readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
+	ram2kDev.eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
+	ram2kDev.initialiseNAND = nandemul2k_InitialiseNAND;
+	ram2kDev.markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
+	ram2kDev.queryNANDBlock = nandemul2k_QueryNANDBlock;
+
+	yaffs_initialise(yaffsfs_config);
+	
+	return 0;
+}
+
+
+
+void SetCheckpointReservedBlocks(int n)
+{
+	flashDev.nCheckpointReservedBlocks = n;
+}
+