140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project/* 240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * YAFFS: Yet another FFS. A NAND-flash specific file system. 340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * yaffs_tagscompat.h: Tags compatability layer to use YAFFS1 formatted NAND. 440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * Copyright (C) 2002 Aleph One Ltd. 640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * Created by Charles Manning <charles@aleph1.co.uk> 840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * This program is free software; you can redistribute it and/or modify 1040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * it under the terms of the GNU General Public License version 2 as 1140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * published by the Free Software Foundation. 1240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * 1340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * $Id: yaffs_tagscompat.c,v 1.8 2005/11/29 20:54:32 marty Exp $ 1440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project */ 1540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffs_guts.h" 1740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffs_tagscompat.h" 1840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#include "yaffs_ecc.h" 1940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND); 2140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#ifdef NOTYET 2240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND); 2340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, 2440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const __u8 * data, 2540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const yaffs_Spare * spare); 2640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, 2740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const yaffs_Spare * spare); 2840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND); 2940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#endif 3040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic const char yaffs_countBitsTable[256] = { 3240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 3340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 3440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 3540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 3740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 4140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 4240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 4340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 4540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 4840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project}; 4940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 5040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int yaffs_CountBits(__u8 x) 5140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 5240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int retVal; 5340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project retVal = yaffs_countBitsTable[x]; 5440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return retVal; 5540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 5640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 5740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project/********** Tags ECC calculations *********/ 5840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 5940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectvoid yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare) 6040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 6140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCCalculate(data, spare->ecc1); 6240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCCalculate(&data[256], spare->ecc2); 6340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 6440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectvoid yaffs_CalcTagsECC(yaffs_Tags * tags) 6640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 6740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Calculate an ecc */ 6840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 6940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; 7040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project unsigned i, j; 7140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project unsigned ecc = 0; 7240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project unsigned bit = 0; 7340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 7440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tags->ecc = 0; 7540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 7640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for (i = 0; i < 8; i++) { 7740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project for (j = 1; j & 0xff; j <<= 1) { 7840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project bit++; 7940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (b[i] & j) { 8040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ecc ^= bit; 8140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 8240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 8340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 8440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tags->ecc = ecc; 8640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 8840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 8940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint yaffs_CheckECCOnTags(yaffs_Tags * tags) 9040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 9140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project unsigned ecc = tags->ecc; 9240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 9340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_CalcTagsECC(tags); 9440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 9540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ecc ^= tags->ecc; 9640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 9740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (ecc && ecc <= 64) { 9840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* TODO: Handle the failure better. Retire? */ 9940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; 10040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 10140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ecc--; 10240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 10340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project b[ecc / 8] ^= (1 << (ecc & 7)); 10440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 10540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Now recvalc the ecc */ 10640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_CalcTagsECC(tags); 10740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 10840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return 1; /* recovered error */ 10940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else if (ecc) { 11040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Wierd ecc failure value */ 11140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* TODO Need to do somethiong here */ 11240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return -1; /* unrecovered error */ 11340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 11440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return 0; 11640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 11740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 11840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project/********** Tags **********/ 11940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr, 12140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Tags * tagsPtr) 12240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 12340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; 12440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_CalcTagsECC(tagsPtr); 12640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 12740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte0 = tu->asBytes[0]; 12840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte1 = tu->asBytes[1]; 12940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte2 = tu->asBytes[2]; 13040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte3 = tu->asBytes[3]; 13140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte4 = tu->asBytes[4]; 13240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte5 = tu->asBytes[5]; 13340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte6 = tu->asBytes[6]; 13440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project sparePtr->tagByte7 = tu->asBytes[7]; 13540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 13640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 13740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr, 13840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Tags * tagsPtr) 13940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 14040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; 14140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int result; 14240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 14340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[0] = sparePtr->tagByte0; 14440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[1] = sparePtr->tagByte1; 14540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[2] = sparePtr->tagByte2; 14640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[3] = sparePtr->tagByte3; 14740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[4] = sparePtr->tagByte4; 14840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[5] = sparePtr->tagByte5; 14940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[6] = sparePtr->tagByte6; 15040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tu->asBytes[7] = sparePtr->tagByte7; 15140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 15240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project result = yaffs_CheckECCOnTags(tagsPtr); 15340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (result > 0) { 15440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->tagsEccFixed++; 15540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else if (result < 0) { 15640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->tagsEccUnfixed++; 15740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 15840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 15940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 16040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_SpareInitialise(yaffs_Spare * spare) 16140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 16240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(spare, 0xFF, sizeof(yaffs_Spare)); 16340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 16440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 16540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev, 16640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int chunkInNAND, const __u8 * data, 16740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare * spare) 16840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 16940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) { 17040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 17140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR("**>> yaffs chunk %d is not valid" TENDSTR), 17240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project chunkInNAND)); 17340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_FAIL; 17440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 17540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 17640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->nPageWrites++; 17740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return dev->writeChunkToNAND(dev, chunkInNAND, data, spare); 17840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 17940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 18040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, 18140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int chunkInNAND, 18240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 * data, 18340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare * spare, 18440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCResult * eccResult, 18540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int doErrorCorrection) 18640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 18740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int retVal; 18840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare localSpare; 18940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 19040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->nPageReads++; 19140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 19240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (!spare && data) { 19340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* If we don't have a real spare, then we use a local one. */ 19440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Need this for the calculation of the ecc */ 19540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project spare = &localSpare; 19640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 19740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 19840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (!dev->useNANDECC) { 19940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare); 20040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (data && doErrorCorrection) { 20140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Do ECC correction */ 20240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Todo handle any errors */ 20340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int eccResult1, eccResult2; 20440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 calcEcc[3]; 20540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 20640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCCalculate(data, calcEcc); 20740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eccResult1 = 20840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCCorrect(data, spare->ecc1, calcEcc); 20940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCCalculate(&data[256], calcEcc); 21040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eccResult2 = 21140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc); 21240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 21340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eccResult1 > 0) { 21440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 21540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 21640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>yaffs ecc error fix performed on chunk %d:0" 21740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 21840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->eccFixed++; 21940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else if (eccResult1 < 0) { 22040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 22140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 22240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>yaffs ecc error unfixed on chunk %d:0" 22340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 22440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->eccUnfixed++; 22540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 22640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 22740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eccResult2 > 0) { 22840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 22940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 23040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>yaffs ecc error fix performed on chunk %d:1" 23140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 23240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->eccFixed++; 23340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else if (eccResult2 < 0) { 23440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 23540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 23640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>yaffs ecc error unfixed on chunk %d:1" 23740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 23840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->eccUnfixed++; 23940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 24040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eccResult1 || eccResult2) { 24240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* We had a data problem on this page */ 24340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_HandleReadDataError(dev, chunkInNAND); 24440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 24540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 24640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eccResult1 < 0 || eccResult2 < 0) 24740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *eccResult = YAFFS_ECC_RESULT_UNFIXED; 24840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else if (eccResult1 > 0 || eccResult2 > 0) 24940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *eccResult = YAFFS_ECC_RESULT_FIXED; 25040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else 25140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *eccResult = YAFFS_ECC_RESULT_NO_ERROR; 25240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 25340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else { 25440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Must allocate enough memory for spare+2*sizeof(int) */ 25540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* for ecc results from device. */ 25640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project struct yaffs_NANDSpare nspare; 25740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project retVal = 25840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->readChunkFromNAND(dev, chunkInNAND, data, 25940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (yaffs_Spare *) & nspare); 26040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memcpy(spare, &nspare, sizeof(yaffs_Spare)); 26140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (data && doErrorCorrection) { 26240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (nspare.eccres1 > 0) { 26340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 26440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 26540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>mtd ecc error fix performed on chunk %d:0" 26640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 26740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else if (nspare.eccres1 < 0) { 26840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 26940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 27040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>mtd ecc error unfixed on chunk %d:0" 27140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 27240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 27340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 27440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (nspare.eccres2 > 0) { 27540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 27640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 27740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>mtd ecc error fix performed on chunk %d:1" 27840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 27940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else if (nspare.eccres2 < 0) { 28040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR, 28140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR 28240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project ("**>>mtd ecc error unfixed on chunk %d:1" 28340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project TENDSTR), chunkInNAND)); 28440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 28540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 28640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (nspare.eccres1 || nspare.eccres2) { 28740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* We had a data problem on this page */ 28840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_HandleReadDataError(dev, chunkInNAND); 28940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 29040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 29140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (nspare.eccres1 < 0 || nspare.eccres2 < 0) 29240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *eccResult = YAFFS_ECC_RESULT_UNFIXED; 29340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) 29440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *eccResult = YAFFS_ECC_RESULT_FIXED; 29540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else 29640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *eccResult = YAFFS_ECC_RESULT_NO_ERROR; 29740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 29840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 29940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 30040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return retVal; 30140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 30240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 30340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#ifdef NOTYET 30440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, 30540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int chunkInNAND) 30640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 30740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 30840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static int init = 0; 30940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; 31040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static __u8 data[YAFFS_BYTES_PER_CHUNK]; 31140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Might as well always allocate the larger size for */ 31240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* dev->useNANDECC == true; */ 31340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static __u8 spare[sizeof(struct yaffs_NANDSpare)]; 31440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 31540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); 31640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 31740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (!init) { 31840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK); 31940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project init = 1; 32040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 32140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK)) 32340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_FAIL; 32440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (memcmp(cmpbuf, spare, 16)) 32540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_FAIL; 32640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 32840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 32940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 33040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#endif 33140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 33240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project/* 33340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * Functions for robustisizing 33440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project */ 33540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 33640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND) 33740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 33840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blockInNAND = chunkInNAND / dev->nChunksPerBlock; 33940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 34040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Mark the block for retirement */ 34140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; 34240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, 34340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND)); 34440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 34540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* TODO: 34640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * Just do a garbage collection on the affected block 34740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * then retire the block 34840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project * NB recursion 34940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project */ 35040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 35140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 35240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#ifdef NOTYET 35340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND) 35440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 35540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 35640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 35740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, 35840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const __u8 * data, 35940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const yaffs_Spare * spare) 36040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 36140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 36240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 36340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, 36440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const yaffs_Spare * spare) 36540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 36640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 36740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 36840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND) 36940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 37040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blockInNAND = chunkInNAND / dev->nChunksPerBlock; 37140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 37240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Mark the block for retirement */ 37340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; 37440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* Delete the chunk */ 37540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); 37640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 37740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 37840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectstatic int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1, 37940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const yaffs_Spare * s0, const yaffs_Spare * s1) 38040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 38140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 38240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 || 38340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte0 != s1->tagByte0 || 38440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte1 != s1->tagByte1 || 38540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte2 != s1->tagByte2 || 38640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte3 != s1->tagByte3 || 38740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte4 != s1->tagByte4 || 38840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte5 != s1->tagByte5 || 38940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte6 != s1->tagByte6 || 39040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->tagByte7 != s1->tagByte7 || 39140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->ecc1[0] != s1->ecc1[0] || 39240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->ecc1[1] != s1->ecc1[1] || 39340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->ecc1[2] != s1->ecc1[2] || 39440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->ecc2[0] != s1->ecc2[0] || 39540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) { 39640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return 0; 39740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 39840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 39940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return 1; 40040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 40140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project#endif /* NOTYET */ 40240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 40340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev, 40440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int chunkInNAND, 40540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const __u8 * data, 40640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project const yaffs_ExtendedTags * 40740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags) 40840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 40940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare spare; 41040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Tags tags; 41140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 41240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_SpareInitialise(&spare); 41340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 41440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eTags->chunkDeleted) { 41540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project spare.pageStatus = 0; 41640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else { 41740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tags.objectId = eTags->objectId; 41840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tags.chunkId = eTags->chunkId; 41940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tags.byteCount = eTags->byteCount; 42040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project tags.serialNumber = eTags->serialNumber; 42140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 42240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (!dev->useNANDECC && data) { 42340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_CalcECC(data, &spare); 42440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 42540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_LoadTagsIntoSpare(&spare, &tags); 42640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 42740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 42840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 42940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare); 43040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 43140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 43240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, 43340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int chunkInNAND, 43440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project __u8 * data, 43540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ExtendedTags * eTags) 43640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 43740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 43840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare spare; 43940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Tags tags; 44040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCResult eccResult; 44140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 44240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static yaffs_Spare spareFF; 44340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static int init; 44440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 44540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (!init) { 44640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(&spareFF, 0xFF, sizeof(spareFF)); 44740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project init = 1; 44840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 44940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 45040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (yaffs_ReadChunkFromNAND 45140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (dev, chunkInNAND, data, &spare, &eccResult, 1)) { 45240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* eTags may be NULL */ 45340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eTags) { 45440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 45540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int deleted = 45640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; 45740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 45840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->chunkDeleted = deleted; 45940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->eccResult = eccResult; 46040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->blockBad = 0; /* We're reading it */ 46140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project /* therefore it is not a bad block */ 46240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->chunkUsed = 46340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project (memcmp(&spareFF, &spare, sizeof(spareFF)) != 46440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 0) ? 1 : 0; 46540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 46640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (eTags->chunkUsed) { 46740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_GetTagsFromSpare(dev, &spare, &tags); 46840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 46940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->objectId = tags.objectId; 47040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->chunkId = tags.chunkId; 47140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->byteCount = tags.byteCount; 47240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project eTags->serialNumber = tags.serialNumber; 47340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 47440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 47540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 47640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 47740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } else { 47840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_FAIL; 47940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 48040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 48140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 48240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, 48340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blockInNAND) 48440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 48540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 48640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare spare; 48740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 48840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(&spare, 0xff, sizeof(yaffs_Spare)); 48940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 49040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project spare.blockStatus = 'Y'; 49140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 49240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL, 49340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project &spare); 49440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, 49540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project NULL, &spare); 49640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 49740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 49840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 49940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 50040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 50140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Projectint yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, 50240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int blockNo, yaffs_BlockState * 50340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project state, 50440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project int *sequenceNumber) 50540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project{ 50640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 50740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_Spare spare0, spare1; 50840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static yaffs_Spare spareFF; 50940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project static int init; 51040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ECCResult dummy; 51140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 51240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (!init) { 51340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project memset(&spareFF, 0xFF, sizeof(spareFF)); 51440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project init = 1; 51540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project } 51640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 51740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *sequenceNumber = 0; 51840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 51940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL, 52040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project &spare0, &dummy, 1); 52140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL, 52240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project &spare1, &dummy, 1); 52340c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 52440c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7) 52540c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *state = YAFFS_BLOCK_STATE_DEAD; 52640c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0) 52740c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *state = YAFFS_BLOCK_STATE_EMPTY; 52840c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project else 52940c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; 53040c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project 53140c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project return YAFFS_OK; 53240c4004d07a37a9b140067f893930ce4436b9346The Android Open Source Project} 533