*
*/
-const char *yaffs_mtdif_c_version = "$Id: yaffs_mtdif.c,v 1.4 2002-11-26 01:15:37 charles Exp $";
+const char *yaffs_mtdif_c_version = "$Id: yaffs_mtdif.c,v 1.10 2004-09-19 08:14:50 charles Exp $";
#ifdef CONFIG_YAFFS_MTD_ENABLED
#include "linux/mtd/mtd.h"
#include "linux/types.h"
+#include "linux/time.h"
#ifndef CONFIG_YAFFS_USE_OLD_MTD
#include "linux/mtd/nand.h"
#endif
+struct nand_oobinfo yaffs_oobinfo = {
+ useecc: 1,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,8))
+// this is for versions of mtd nand driver in kernel 2.6.8 and later
+ eccbytes: 6,
+#endif
+ eccpos: {8, 9, 10, 13, 14, 15}
+};
+
+struct nand_oobinfo yaffs_noeccinfo = {
+ useecc: 0,
+};
+
int nandmtd_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
size_t dummy;
+ int retval = 0;
- loff_t addr = ((loff_t)chunkInNAND) * YAFFS_BYTES_PER_CHUNK;
-
+ loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk;
__u8 *spareAsBytes = (__u8 *)spare;
#ifndef CONFIG_YAFFS_USE_OLD_MTD
if(data && spare)
{
-#ifdef CONFIG_YAFFS_USE_NANDECC
- mtd->write_ecc(mtd,addr,YAFFS_BYTES_PER_CHUNK,&dummy,data,spareAsBytes,NAND_YAFFS_OOB);
-#else
- mtd->write_ecc(mtd,addr,YAFFS_BYTES_PER_CHUNK,&dummy,data,spareAsBytes,NAND_NONE_OOB);
-#endif
+ if(dev->useNANDECC)
+ mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo);
+ else
+ mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo);
}
else
{
#endif
if(data)
- mtd->write(mtd,addr,YAFFS_BYTES_PER_CHUNK,&dummy,data);
+ retval = mtd->write(mtd,addr,dev->nBytesPerChunk,&dummy,data);
if(spare)
- mtd->write_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes);
+ retval = mtd->write_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes);
#ifndef CONFIG_YAFFS_USE_OLD_MTD
}
#endif
- return YAFFS_OK;
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
}
-
int nandmtd_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
size_t dummy;
+ int retval = 0;
- loff_t addr = ((loff_t)chunkInNAND) * YAFFS_BYTES_PER_CHUNK;
+ loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk;
__u8 *spareAsBytes = (__u8 *)spare;
-
#ifndef CONFIG_YAFFS_USE_OLD_MTD
if(data && spare)
{
-#ifdef CONFIG_YAFFS_USE_NANDECC
- mtd->read_ecc(mtd,addr,YAFFS_BYTES_PER_CHUNK,&dummy,data,spareAsBytes,NAND_YAFFS_OOB);
-#else
- mtd->read_ecc(mtd,addr,YAFFS_BYTES_PER_CHUNK,&dummy,data,spareAsBytes,NAND_NONE_OOB);
-#endif
+ if(dev->useNANDECC)
+ { // Careful, this call adds 2 ints to the end of the spare data. Calling function should
+ // allocate enough memory for spare, i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)].
+ retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo);
+ }
+ else
+ {
+ retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo);
+ }
}
else
{
#endif
if(data)
- mtd->read(mtd,addr,YAFFS_BYTES_PER_CHUNK,&dummy,data);
+ retval = mtd->read(mtd,addr,dev->nBytesPerChunk,&dummy,data);
if(spare)
- mtd->read_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes);
+ retval = mtd->read_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes);
#ifndef CONFIG_YAFFS_USE_OLD_MTD
}
#endif
- return YAFFS_OK;
-}
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+// Callback not needed for NAND
+#if 0
static void nandmtd_EraseCallback(struct erase_info *ei)
{
yaffs_Device *dev = (yaffs_Device *)ei->priv;
up(&dev->sem);
}
+#endif
int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
{
-
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
- __u32 addr = ((loff_t) blockNumber) * YAFFS_BYTES_PER_BLOCK;
+ __u32 addr = ((loff_t) blockNumber) * dev->nBytesPerChunk * dev->nChunksPerBlock;
struct erase_info ei;
+ int retval = 0;
ei.mtd = mtd;
ei.addr = addr;
- ei.len = YAFFS_BYTES_PER_BLOCK;
+ ei.len = dev->nBytesPerChunk * dev->nChunksPerBlock;
ei.time = 1000;
ei.retries = 2;
- ei.callback = nandmtd_EraseCallback;
+ ei.callback = NULL;
ei.priv = (u_long)dev;
// Todo finish off the ei if required
sema_init(&dev->sem,0);
- mtd->erase(mtd,&ei);
+ retval = mtd->erase(mtd,&ei);
-
- down(&dev->sem); // Wait for the erasure to complete
-
- //Todo, check result of erasure
-
- return YAFFS_OK;
+ //No need for callback
+ // down(&dev->sem); // Wait for the erasure to complete
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
}
int nandmtd_InitialiseNAND(yaffs_Device *dev)