yaffs-ecoscentric: packages/fs/yaffs/current/src/ecos-yaffs-nand.c annotate

author	Ross Younger <wry@ecoscentric.com>
date	Tue, 03 Nov 2009 12:15:09 +0000
parents
children	16de60f90faa

rev	line source
300 9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	1 //=============================================================================
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	2 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	3 // ecos-yaffs-nand.c
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	4 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	5 // Glue for YAFFS to the eCos NAND library
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	6 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	7 //=============================================================================
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	8 // ####ECOSGPLCOPYRIGHTBEGIN####
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	9 // -------------------------------------------
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	10 // This file is part of eCos, the Embedded Configurable Operating System.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	11 // Copyright (C) 2009 eCosCentric Limited.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	12 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	13 // eCos is free software; you can redistribute it and/or modify it under
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	14 // the terms of the GNU General Public License as published by the Free
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	15 // Software Foundation; either version 2 or (at your option) any later
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	16 // version.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	17 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	18 // eCos is distributed in the hope that it will be useful, but WITHOUT
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	21 // for more details.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	22 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	23 // You should have received a copy of the GNU General Public License
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	26 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	27 // As a special exception, if other files instantiate templates or use
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	28 // macros or inline functions from this file, or you compile this file
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	29 // and link it with other works to produce a work based on this file,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	30 // this file does not by itself cause the resulting work to be covered by
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	31 // the GNU General Public License. However the source code for this file
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	32 // must still be made available in accordance with section (3) of the GNU
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	33 // General Public License v2.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	34 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	35 // This exception does not invalidate any other reasons why a work based
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	36 // on this file might be covered by the GNU General Public License.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	37 // -------------------------------------------
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	38 // ####ECOSGPLCOPYRIGHTEND####
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	39 //=============================================================================
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	40 //#####DESCRIPTIONBEGIN####
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	41 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	42 // Author(s): wry
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	43 // Date: 2009-05-07
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	44 //
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	45 //####DESCRIPTIONEND####
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	46 //=============================================================================
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	47
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	48 #include "ecos-yaffs.h"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	49 #include "ecos-yaffs-nand.h"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	50 #include "yaffs_packedtags1.h"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	51 #include "yaffs_packedtags2.h"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	52 #include "yaffs_tagscompat.h"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	53 #include <cyg/nand/util.h> // for BLOCK2PAGEADDR
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	54
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	55 int eyaffs_initialiseNAND (struct yaffs_DeviceStruct * dev)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	56 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	57 // Nothing to do - we've already inited it in mount().
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	58 //cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	59 return YAFFS_OK;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	60 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	61
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	62 int eyaffs_deinitialiseNAND (struct yaffs_DeviceStruct * dev)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	63 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	64 // Nothing to do
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	65 //cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	66 return YAFFS_OK;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	67 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	68
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	69 int eyaffs_eraseBlockInNAND (struct yaffs_DeviceStruct * dev, int blockInNAND)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	70 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	71 cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	72 int rv = cyg_nand_erase_block(part, blockInNAND);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	73 return rv==0 ? YAFFS_OK : YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	74 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	75
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	76 // If writing a yaffs_PackedTags1, we store only its eight meaningful bytes
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	77 #define PACKEDTAGS1_OOBSIZE 8
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	78
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	79 int eyaffs_writeChunkWithTagsToNAND (struct yaffs_DeviceStruct * dev,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	80 int chunkInNAND, const __u8 * data,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	81 const yaffs_ExtendedTags * tags)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	82 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	83 cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	84 int rv;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	85
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	86 if (!dev->isYaffs2) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	87 #ifdef CONFIG_YAFFS_NO_YAFFS1
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	88 rv = 1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	89 #else
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	90 yaffs_PackedTags1 pt1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	91
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	92 if (tags->chunkDeleted) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	93 memset(&pt1, 0xff, sizeof(pt1));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	94 pt1.deleted = 0;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	95 //((CYG_BYTE*)&pt1)[8] = 0; // TODO: support 9BYTE_TAGS, if there is a demand to (requires corresponding fixup in the ECC check below)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	96 } else {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	97 yaffs_PackTags1(&pt1, tags);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	98 yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	99 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	100 rv = cyg_nand_write_page(part, chunkInNAND, data, data ? dev->nDataBytesPerChunk : 0, &pt1, PACKEDTAGS1_OOBSIZE);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	101 #endif
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	102 } else {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	103 #ifdef CYGSEM_FS_YAFFS_OMIT_YAFFS2_CODE
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	104 return YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	105 #else
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	106 // YAFFS2 mode.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	107 // N.B. We are not doing ECC - the NAND layer does that - so don't
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	108 // need to bother with the whole tags struct, just the bit that matters.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	109
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	110 if (!data \|\| !tags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	111 T(YAFFS_TRACE_ERROR,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	112 (TSTR("**>> yaffs2: both data and tags must be present" TENDSTR)));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	113 YBUG();
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	114 return YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	115 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	116
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	117 if (dev->inbandTags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	118 yaffs_PackedTags2TagsPart *pt2tp;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	119 pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	120 yaffs_PackTags2TagsPart(pt2tp, tags);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	121 rv = cyg_nand_write_page(part, chunkInNAND, data, dev->totalBytesPerChunk, 0, 0);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	122 } else {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	123 yaffs_PackedTags2TagsPart pt;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	124 yaffs_PackTags2TagsPart(&pt, tags);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	125 rv = cyg_nand_write_page(part, chunkInNAND, data, dev->nDataBytesPerChunk, &pt, sizeof(yaffs_PackedTags2TagsPart));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	126 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	127 #endif
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	128 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	129
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	130 // all done:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	131 return rv==0 ? YAFFS_OK : YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	132 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	133
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	134 int eyaffs_readChunkWithTagsFromNAND (struct yaffs_DeviceStruct * dev,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	135 int chunkInNAND, __u8 * data,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	136 yaffs_ExtendedTags * tags)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	137 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	138 cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	139 int localData = 0;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	140 int rv;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	141
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	142 if (!dev->isYaffs2) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	143 #ifdef CONFIG_YAFFS_NO_YAFFS1
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	144 rv = 1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	145 #else
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	146 yaffs_PackedTags1 pt1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	147 memset(&pt1, 0xff, sizeof(yaffs_PackedTags1));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	148
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	149 rv = cyg_nand_read_page(part, chunkInNAND, data, data ? dev->nDataBytesPerChunk : 0, &pt1, PACKEDTAGS1_OOBSIZE);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	150
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	151 if (rv == 0) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	152 if (yaffs_CheckFF((CYG_BYTE*)&pt1, 8)) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	153 // block is empty
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	154 if (tags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	155 memset(tags, 0, sizeof(*tags));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	156 tags->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	157 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	158 } else {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	159 // must check and correct tags' mini-ecc.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	160 int deleted = !pt1.deleted; // this would break the tags ECC.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	161 pt1.deleted = 1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	162 // TODO: support 9BYTE_TAGS if there is a demand.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	163 int rv2 = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	164 if (rv2 < 0) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	165 T(YAFFS_TRACE_ERROR,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	166 (TSTR ("**>>yaffs ecc error unfixed on chunk %d:0"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	167 TENDSTR), chunkInNAND));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	168 dev->eccUnfixed++;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	169 rv = EIO;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	170 } else {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	171 if (tags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	172 yaffs_UnpackTags1(tags, &pt1);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	173 tags->chunkDeleted = deleted;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	174 tags->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	175 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	176
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	177 if (rv2 > 0) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	178 T(YAFFS_TRACE_ERROR,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	179 (TSTR ("**>>yaffs ecc tags error fix performed on chunk %d:0"
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	180 TENDSTR), chunkInNAND));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	181 dev->eccFixed++;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	182 if (tags)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	183 tags->eccResult = YAFFS_ECC_RESULT_FIXED;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	184 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	185 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	186 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	187 } // else reading the NAND failed; drop out
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	188 #endif
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	189
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	190 } else { // YAFFS2 mode
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	191 #ifdef CYGSEM_FS_YAFFS_OMIT_YAFFS2_CODE
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	192 return YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	193 #else
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	194 if (dev->inbandTags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	195 if (!data) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	196 localData = 1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	197 data = yaffs_GetTempBuffer(dev, __LINE__);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	198 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	199
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	200 rv = cyg_nand_read_page(part, chunkInNAND, data, data ? dev->totalBytesPerChunk : 0, 0, 0);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	201 if (tags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	202 yaffs_PackedTags2TagsPart *pt2tp;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	203 pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	204 yaffs_UnpackTags2TagsPart(tags, pt2tp);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	205 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	206 } else {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	207 yaffs_PackedTags2TagsPart pt;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	208 rv = cyg_nand_read_page(part, chunkInNAND, data, data ? dev->nDataBytesPerChunk : 0, &pt, sizeof(yaffs_PackedTags2TagsPart));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	209 if (tags)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	210 yaffs_UnpackTags2TagsPart(tags, &pt);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	211 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	212 #endif
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	213 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	214
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	215 // all done:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	216 if (localData)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	217 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	218
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	219 if (rv != 0) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	220 if (tags) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	221 // mark the tags as clearly useless
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	222 memset(tags, 0, sizeof(yaffs_ExtendedTags));
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	223 tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	224 tags->blockBad = 1;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	225 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	226 return YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	227 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	228 return YAFFS_OK;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	229 // TODO: go through yaffs_guts and ensure that all calls to ReadChunksWithTagsFromNAND DTRT on FAIL or if the read tags aren't valid.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	230 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	231
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	232 int eyaffs_markNANDBlockBad (struct yaffs_DeviceStruct * dev, int blockNo)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	233 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	234 cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	235 int rv = cyg_nand_bbt_markbad(part, blockNo);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	236 return rv==0 ? YAFFS_OK : YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	237 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	238
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	239 int eyaffs_queryNANDBlock (struct yaffs_DeviceStruct * dev, int blockNo,
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	240 yaffs_BlockState * state, __u32 *sequenceNumber)
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	241 {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	242 yaffs_ExtendedTags tags;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	243 cyg_nand_page_addr pg;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	244 cyg_nand_partition part = (cyg_nand_partition) dev->genericDevice;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	245
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	246 int rv = cyg_nand_bbt_query(part, blockNo);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	247 if (rv < 0) return YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	248
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	249 switch(rv) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	250 case CYG_NAND_BBT_OK:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	251 // Now we need to read the tags from the OOB area of the first page
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	252 pg = CYG_NAND_BLOCK2PAGEADDR(part->dev, blockNo);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	253 // TODO: This is quite inefficient on small page devices in
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	254 // YAFFS2 mode with inbandTags enabled, as the whole page has
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	255 // to be read. Some day, it would be nice to implement part-page
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	256 // reads in the NAND layer where this can be efficiently done.
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	257 int rv2 = eyaffs_readChunkWithTagsFromNAND(dev, pg, 0, &tags);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	258 if (rv2 == YAFFS_FAIL) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	259 (void) cyg_nand_bbt_markbad(part, blockNo);
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	260 goto deadblock;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	261 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	262 if (tags.chunkUsed) {
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	263 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	264 *sequenceNumber = tags.sequenceNumber;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	265 return YAFFS_OK;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	266 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	267 *state = YAFFS_BLOCK_STATE_EMPTY;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	268 *sequenceNumber = 0;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	269 return YAFFS_OK;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	270
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	271 case CYG_NAND_BBT_WORNBAD:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	272 case CYG_NAND_BBT_RESERVED:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	273 case CYG_NAND_BBT_FACTORY_BAD:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	274 deadblock:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	275 *state = YAFFS_BLOCK_STATE_DEAD;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	276 *sequenceNumber = 0;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	277 return YAFFS_OK;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	278 default:
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	279 YBUG(); // can't happen
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	280 return YAFFS_FAIL;
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	281 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	282 }
9c8ff034abb0 Graft in 20090826 source snapshot Ross Younger <wry@ecoscentric.com> parents: diff changeset	283

300

9c8ff034abb0 Graft in 20090826 source snapshot