Clean out unneeded files

Signed-off-by: William Juul <william.juul@tandberg.com>

1 files changed, 0 insertions, 369 deletions

diff --git a/fs/yaffs2/yaffs_mtdif1.c b/fs/yaffs2/yaffs_mtdif1.c
deleted file mode 100644
index 36185b6..0000000
--- a/fs/yaffs2/yaffs_mtdif1.c
+++ /dev/null
@@ -1,369 +0,0 @@
-/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
- * yaffs_mtdif1.c  NAND mtd interface functions for small-page NAND.
- *
- * Copyright (C) 2002 Aleph One Ltd.
- *   for Toby Churchill Ltd and Brightstar Engineering
- *
- * 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 module provides the interface between yaffs_nand.c and the
- * MTD API.  This version is used when the MTD interface supports the
- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
- * and we have small-page NAND device.
- *
- * These functions are invoked via function pointers in yaffs_nand.c.
- * This replaces functionality provided by functions in yaffs_mtdif.c
- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
- * called in yaffs_mtdif.c when the function pointers are NULL.
- * We assume the MTD layer is performing ECC (useNANDECC is true).
- */
-
-#include "yportenv.h"
-#include "yaffs_guts.h"
-#include "yaffs_packedtags1.h"
-#include "yaffs_tagscompat.h"	// for yaffs_CalcTagsECC
-
-#include "linux/kernel.h"
-#include "linux/version.h"
-#include "linux/types.h"
-#include "linux/mtd/mtd.h"
-
-/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-
-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.5 2007/10/29 14:59:57 imcd Exp $";
-
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
-# define YTAG1_SIZE 8
-#else
-# define YTAG1_SIZE 9
-#endif
-
-#if 0
-/* Use the following nand_ecclayout with MTD when using
- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
- * If you have existing Yaffs images and the byte order differs from this,
- * adjust 'oobfree' to match your existing Yaffs data.
- *
- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
- * the 9th byte.
- *
- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
- * byte and B is the small-page bad-block indicator byte.
- */
-static struct nand_ecclayout nand_oob_16 = {
-	.eccbytes = 6,
-	.eccpos = { 8, 9, 10, 13, 14, 15 },
-	.oobavail = 9,
-	.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
-};
-#endif
-
-/* Write a chunk (page) of data to NAND.
- *
- * Caller always provides ExtendedTags data which are converted to a more
- * compact (packed) form for storage in NAND.  A mini-ECC runs over the
- * contents of the tags meta-data; used to valid the tags when read.
- *
- *  - Pack ExtendedTags to PackedTags1 form
- *  - Compute mini-ECC for PackedTags1
- *  - Write data and packed tags to NAND.
- *
- * Note: Due to the use of the PackedTags1 meta-data which does not include
- * a full sequence number (as found in the larger PackedTags2 form) it is
- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
- * discarded and dirty.  This is not ideal: newer NAND parts are supposed
- * to be written just once.  When Yaffs performs this operation, this
- * function is called with a NULL data pointer -- calling MTD write_oob
- * without data is valid usage (2.6.17).
- *
- * Any underlying MTD error results in YAFFS_FAIL.
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
-	int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
-{
-	struct mtd_info * mtd = dev->genericDevice;
-	int chunkBytes = dev->nDataBytesPerChunk;
-	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
-	struct mtd_oob_ops ops;
-	yaffs_PackedTags1 pt1;
-	int retval;
-
-	/* we assume that PackedTags1 and yaffs_Tags are compatible */
-	compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
-	compile_time_assertion(sizeof(yaffs_Tags) == 8);
-
-	dev->nPageWrites++;
-
-	yaffs_PackTags1(&pt1, etags);
-	yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
-
-	/* When deleting a chunk, the upper layer provides only skeletal
-	 * etags, one with chunkDeleted set.  However, we need to update the
-	 * tags, not erase them completely.  So we use the NAND write property
-	 * that only zeroed-bits stick and set tag bytes to all-ones and
-	 * zero just the (not) deleted bit.
-	 */
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
-	if (etags->chunkDeleted) {
-		memset(&pt1, 0xff, 8);
-		/* clear delete status bit to indicate deleted */
-		pt1.deleted = 0;
-	}
-#else
-	((__u8 *)&pt1)[8] = 0xff;
-	if (etags->chunkDeleted) {
-		memset(&pt1, 0xff, 8);
-		/* zero pageStatus byte to indicate deleted */
-		((__u8 *)&pt1)[8] = 0;
-	}
-#endif
-
-	memset(&ops, 0, sizeof(ops));
-	ops.mode = MTD_OOB_AUTO;
-	ops.len = (data) ? chunkBytes : 0;
-	ops.ooblen = YTAG1_SIZE;
-	ops.datbuf = (__u8 *)data;
-	ops.oobbuf = (__u8 *)&pt1;
-
-	retval = mtd->write_oob(mtd, addr, &ops);
-	if (retval) {
-		yaffs_trace(YAFFS_TRACE_MTD,
-			"write_oob failed, chunk %d, mtd error %d\n",
-			chunkInNAND, retval);
-	}
-	return retval ? YAFFS_FAIL : YAFFS_OK;
-}
-
-/* Return with empty ExtendedTags but add eccResult.
- */
-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
-{
-	if (etags) {
-		memset(etags, 0, sizeof(*etags));
-		etags->eccResult = eccResult;
-	}
-	return retval;
-}
-
-/* Read a chunk (page) from NAND.
- *
- * Caller expects ExtendedTags data to be usable even on error; that is,
- * all members except eccResult and blockBad are zeroed.
- *
- *  - Check ECC results for data (if applicable)
- *  - Check for blank/erased block (return empty ExtendedTags if blank)
- *  - Check the PackedTags1 mini-ECC (correct if necessary/possible)
- *  - Convert PackedTags1 to ExtendedTags
- *  - Update eccResult and blockBad members to refect state.
- *
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
-	int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
-{
-	struct mtd_info * mtd = dev->genericDevice;
-	int chunkBytes = dev->nDataBytesPerChunk;
-	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
-	int eccres = YAFFS_ECC_RESULT_NO_ERROR;
-	struct mtd_oob_ops ops;
-	yaffs_PackedTags1 pt1;
-	int retval;
-	int deleted;
-
-	dev->nPageReads++;
-
-	memset(&ops, 0, sizeof(ops));
-	ops.mode = MTD_OOB_AUTO;
-	ops.len = (data) ? chunkBytes : 0;
-	ops.ooblen = YTAG1_SIZE;
-	ops.datbuf = data;
-	ops.oobbuf = (__u8 *)&pt1;
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
-	/* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
-	 * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
-	 */
-	ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
-#endif
-	/* Read page and oob using MTD.
-	 * Check status and determine ECC result.
-	 */
-	retval = mtd->read_oob(mtd, addr, &ops);
-	if (retval) {
-		yaffs_trace(YAFFS_TRACE_MTD,
-			"read_oob failed, chunk %d, mtd error %d\n",
-			chunkInNAND, retval);
-	}
-
-	switch (retval) {
-	case 0:
-		/* no error */
-		break;
-
-	case -EUCLEAN:
-		/* MTD's ECC fixed the data */
-		eccres = YAFFS_ECC_RESULT_FIXED;
-		dev->eccFixed++;
-		break;
-
-	case -EBADMSG:
-		/* MTD's ECC could not fix the data */
-		dev->eccUnfixed++;
-		/* fall into... */
-	default:
-		rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
-		etags->blockBad = (mtd->block_isbad)(mtd, addr);
-		return YAFFS_FAIL;
-	}
-
-	/* Check for a blank/erased chunk.
-	 */
-	if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
-		/* when blank, upper layers want eccResult to be <= NO_ERROR */
-		return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
-	}
-
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
-	/* Read deleted status (bit) then return it to it's non-deleted
-	 * state before performing tags mini-ECC check. pt1.deleted is
-	 * inverted.
-	 */
-	deleted = !pt1.deleted;
-	pt1.deleted = 1;
-#else
-	deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
-#endif
-
-	/* Check the packed tags mini-ECC and correct if necessary/possible.
-	 */
-	retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
-	switch (retval) {
-	case 0:
-		/* no tags error, use MTD result */
-		break;
-	case 1:
-		/* recovered tags-ECC error */
-		dev->tagsEccFixed++;
-		if (eccres == YAFFS_ECC_RESULT_NO_ERROR)
-			eccres = YAFFS_ECC_RESULT_FIXED;
-		break;
-	default:
-		/* unrecovered tags-ECC error */
-		dev->tagsEccUnfixed++;
-		return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
-	}
-
-	/* Unpack the tags to extended form and set ECC result.
-	 * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
-	 */
-	pt1.shouldBeFF = 0xFFFFFFFF;
-	yaffs_UnpackTags1(etags, &pt1);
-	etags->eccResult = eccres;
-
-	/* Set deleted state */
-	etags->chunkDeleted = deleted;
-	return YAFFS_OK;
-}
-
-/* Mark a block bad.
- *
- * This is a persistant state.
- * Use of this function should be rare.
- *
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
-{
-	struct mtd_info * mtd = dev->genericDevice;
-	int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
-	int retval;
-
-	yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo);
-
-	retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
-	return (retval) ? YAFFS_FAIL : YAFFS_OK;
-}
-
-/* Check any MTD prerequists.
- * 
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
-{
-	/* 2.6.18 has mtd->ecclayout->oobavail */
-	/* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
-	int oobavail = mtd->ecclayout->oobavail;
-
-	if (oobavail < YTAG1_SIZE) {
-		yaffs_trace(YAFFS_TRACE_ERROR,
-			"mtd device has only %d bytes for tags, need %d\n",
-			oobavail, YTAG1_SIZE);
-		return YAFFS_FAIL;
-	}
-	return YAFFS_OK;
-}
-
-/* Query for the current state of a specific block.
- *
- * Examine the tags of the first chunk of the block and return the state:
- *  - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
- *  - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
- *  - YAFFS_BLOCK_STATE_EMPTY, the block is clean
- *
- * Always returns YAFFS_OK.
- */
-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-	yaffs_BlockState * pState, int *pSequenceNumber)
-{
-	struct mtd_info * mtd = dev->genericDevice;
-	int chunkNo = blockNo * dev->nChunksPerBlock;
-	loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
-	yaffs_ExtendedTags etags;
-	int state = YAFFS_BLOCK_STATE_DEAD;
-	int seqnum = 0;
-	int retval;
-
-	/* We don't yet have a good place to test for MTD config prerequists.
-	 * Do it here as we are called during the initial scan.
-	 */
-	if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
-		return YAFFS_FAIL;
-	}
-
-	retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
-	etags.blockBad = (mtd->block_isbad)(mtd, addr);
-	if (etags.blockBad) {
-		yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-			"block %d is marked bad\n", blockNo);
-		state = YAFFS_BLOCK_STATE_DEAD;
-	}
-	else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
-		/* bad tags, need to look more closely */
-		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
-	}
-	else if (etags.chunkUsed) {
-		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
-		seqnum = etags.sequenceNumber;
-	}
-	else {
-		state = YAFFS_BLOCK_STATE_EMPTY;
-	}
-
-	*pState = state;
-	*pSequenceNumber = seqnum;
-
-	/* query always succeeds */
-	return YAFFS_OK;
-}
-
-#endif /*KERNEL_VERSION*/