--- /dev/null
+/*
+ * 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.
+ */
+
+/* XXX U-BOOT XXX */
+#include <common.h>
+
+const char *yaffs_mtdif_c_version =
+ "$Id: yaffs_mtdif.c,v 1.19 2007/02/14 01:09:06 wookey Exp $";
+
+#include "yportenv.h"
+
+
+#include "yaffs_mtdif.h"
+
+#include "linux/mtd/mtd.h"
+#include "linux/types.h"
+#include "linux/time.h"
+#include "linux/mtd/nand.h"
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
+static struct nand_oobinfo yaffs_oobinfo = {
+ .useecc = 1,
+ .eccbytes = 6,
+ .eccpos = {8, 9, 10, 13, 14, 15}
+};
+
+static struct nand_oobinfo yaffs_noeccinfo = {
+ .useecc = 0,
+};
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob)
+{
+ oob[0] = spare->tb0;
+ oob[1] = spare->tb1;
+ oob[2] = spare->tb2;
+ oob[3] = spare->tb3;
+ oob[4] = spare->tb4;
+ oob[5] = spare->tb5 & 0x3f;
+ oob[5] |= spare->block_status == 'Y' ? 0: 0x80;
+ oob[5] |= spare->page_status == 0 ? 0: 0x40;
+ oob[6] = spare->tb6;
+ oob[7] = spare->tb7;
+}
+
+static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob)
+{
+ struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare;
+ spare->tb0 = oob[0];
+ spare->tb1 = oob[1];
+ spare->tb2 = oob[2];
+ spare->tb3 = oob[3];
+ spare->tb4 = oob[4];
+ spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
+ spare->block_status = oob[5] & 0x80 ? 0xff : 'Y';
+ spare->page_status = oob[5] & 0x40 ? 0xff : 0;
+ spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
+ spare->tb6 = oob[6];
+ spare->tb7 = oob[7];
+ spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
+
+ nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
+}
+#endif
+
+int nandmtd_WriteChunkToNAND(struct yaffs_dev * dev, int chunkInNAND,
+ const u8 * data, const struct yaffs_spare * spare)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ struct mtd_oob_ops ops;
+#endif
+ size_t dummy;
+ int retval = 0;
+
+ loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ u8 spareAsBytes[8]; /* OOB */
+
+ if (data && !spare)
+ retval = mtd->write(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data);
+ else if (spare) {
+ if (dev->param.use_nand_ecc) {
+ translate_spare2oob(spare, spareAsBytes);
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = 8; /* temp hack */
+ } else {
+ ops.mode = MTD_OOB_RAW;
+ ops.ooblen = YAFFS_BYTES_PER_SPARE;
+ }
+ ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
+ ops.datbuf = (u8 *)data;
+ ops.ooboffs = 0;
+ ops.oobbuf = spareAsBytes;
+ retval = mtd->write_oob(mtd, addr, &ops);
+ }
+#else
+ u8 *spareAsBytes = (u8 *) spare;
+
+ if (data && spare) {
+ if (dev->param.use_nand_ecc)
+ retval =
+ mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data, spareAsBytes,
+ &yaffs_oobinfo);
+ else
+ retval =
+ mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data, spareAsBytes,
+ &yaffs_noeccinfo);
+ } else {
+ if (data)
+ retval =
+ mtd->write(mtd, addr, dev->data_bytes_per_chunk, &dummy,
+ data);
+ if (spare)
+ retval =
+ mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
+ &dummy, spareAsBytes);
+ }
+#endif
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd_ReadChunkFromNAND(struct yaffs_dev * dev, int chunkInNAND, u8 * data,
+ struct yaffs_spare * spare)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ struct mtd_oob_ops ops;
+#endif
+ size_t dummy;
+ int retval = 0;
+
+ loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ u8 spareAsBytes[8]; /* OOB */
+
+ if (data && !spare)
+ retval = mtd->read(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data);
+ else if (spare) {
+ if (dev->param.use_nand_ecc) {
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = 8; /* temp hack */
+ } else {
+ ops.mode = MTD_OOB_RAW;
+ ops.ooblen = YAFFS_BYTES_PER_SPARE;
+ }
+ ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
+ ops.datbuf = data;
+ ops.ooboffs = 0;
+ ops.oobbuf = spareAsBytes;
+ retval = mtd->read_oob(mtd, addr, &ops);
+ if (dev->param.use_nand_ecc)
+ translate_oob2spare(spare, spareAsBytes);
+ }
+#else
+ u8 *spareAsBytes = (u8 *) spare;
+
+ if (data && spare) {
+ if (dev->param.use_nand_ecc) {
+ /* 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->data_bytes_per_chunk,
+ &dummy, data, spareAsBytes,
+ &yaffs_oobinfo);
+ } else {
+ retval =
+ mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data, spareAsBytes,
+ &yaffs_noeccinfo);
+ }
+ } else {
+ if (data)
+ retval =
+ mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy,
+ data);
+ if (spare)
+ retval =
+ mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
+ &dummy, spareAsBytes);
+ }
+#endif
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd_EraseBlockInNAND(struct yaffs_dev * dev, int blockNumber)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
+ __u32 addr =
+ ((loff_t) blockNumber) * dev->data_bytes_per_chunk
+ * dev->param.chunks_per_block;
+ struct erase_info ei;
+ int retval = 0;
+
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block;
+ ei.time = 1000;
+ ei.retries = 2;
+ ei.callback = NULL;
+ ei.priv = (u_long) dev;
+
+ /* Todo finish off the ei if required */
+
+/* XXX U-BOOT XXX */
+#if 0
+ sema_init(&dev->sem, 0);
+#endif
+
+ retval = mtd->erase(mtd, &ei);
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd_InitialiseNAND(struct yaffs_dev * dev)
+{
+ return YAFFS_OK;
+}