X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_mtdif.c;h=4fc765ce38a467550487a998b432582a0388a80c;hp=04c491844c743faff90eef5a386c86d886598dd3;hb=f37d0b9ff0c87c1e22a5f708dbb4b455da7af59f;hpb=7b8bbeef9f32bbc33c32afc396974273e10deb32 diff --git a/yaffs_mtdif.c b/yaffs_mtdif.c index 04c4918..4fc765c 100644 --- a/yaffs_mtdif.c +++ b/yaffs_mtdif.c @@ -1,8 +1,7 @@ /* - * YAFFS: Yet another FFS. A NAND-flash specific file system. - * yaffs_mtdif.c NAND mtd wrapper functions. + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002 Aleph One Ltd. + * Copyright (C) 2002-2007 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning @@ -10,11 +9,10 @@ * 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. - * */ const char *yaffs_mtdif_c_version = - "$Id: yaffs_mtdif.c,v 1.17 2006-11-29 20:21:12 charles Exp $"; + "$Id: yaffs_mtdif.c,v 1.25 2010-02-19 01:06:31 charles Exp $"; #include "yportenv.h" @@ -26,208 +24,26 @@ const char *yaffs_mtdif_c_version = #include "linux/time.h" #include "linux/mtd/nand.h" -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) -static struct nand_oobinfo yaffs_oobinfo = { - .useecc = 1, - .eccbytes = 6, - .eccpos = {8, 9, 10, 13, 14, 15} -}; - -static struct nand_oobinfo yaffs_noeccinfo = { - .useecc = 0, -}; -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob) -{ - oob[0] = spare->tagByte0; - oob[1] = spare->tagByte1; - oob[2] = spare->tagByte2; - oob[3] = spare->tagByte3; - oob[4] = spare->tagByte4; - oob[5] = spare->tagByte5 & 0x3f; - oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80; - oob[5] |= spare->pageStatus == 0 ? 0: 0x40; - oob[6] = spare->tagByte6; - oob[7] = spare->tagByte7; -} - -static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob) -{ - struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare; - spare->tagByte0 = oob[0]; - spare->tagByte1 = oob[1]; - spare->tagByte2 = oob[2]; - spare->tagByte3 = oob[3]; - spare->tagByte4 = oob[4]; - spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; - spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y'; - spare->pageStatus = oob[5] & 0x40 ? 0xff : 0; - spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; - spare->tagByte6 = oob[6]; - spare->tagByte7 = oob[7]; - spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; - - nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ -} -#endif +#include "yaffs_linux.h" -int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, const yaffs_Spare * spare) +int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#endif - size_t dummy; - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - __u8 spareAsBytes[8]; /* OOB */ - - if (data && !spare) - retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data); - else if (spare) { - if (dev->useNANDECC) { - translate_spare2oob(spare, spareAsBytes); - ops.mode = MTD_OOB_AUTO; - ops.ooblen = 8; /* temp hack */ - } else { - ops.mode = MTD_OOB_RAW; - ops.ooblen = YAFFS_BYTES_PER_SPARE; - } - ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; - ops.datbuf = (u8 *)data; - ops.ooboffs = 0; - ops.oobbuf = spareAsBytes; - retval = mtd->write_oob(mtd, addr, &ops); - } -#else - __u8 *spareAsBytes = (__u8 *) spare; - - if (data && spare) { - if (dev->useNANDECC) - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_oobinfo); - else - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_noeccinfo); - } else { - if (data) - retval = - mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (spare) - retval = - mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, - &dummy, spareAsBytes); - } -#endif - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, - yaffs_Spare * spare) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#endif - size_t dummy; - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - __u8 spareAsBytes[8]; /* OOB */ - - if (data && !spare) - retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data); - else if (spare) { - if (dev->useNANDECC) { - ops.mode = MTD_OOB_AUTO; - ops.ooblen = 8; /* temp hack */ - } else { - ops.mode = MTD_OOB_RAW; - ops.ooblen = YAFFS_BYTES_PER_SPARE; - } - ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; - ops.datbuf = data; - ops.ooboffs = 0; - ops.oobbuf = spareAsBytes; - retval = mtd->read_oob(mtd, addr, &ops); - if (dev->useNANDECC) - translate_oob2spare(spare, spareAsBytes); - } -#else - __u8 *spareAsBytes = (__u8 *) spare; - - if (data && spare) { - if (dev->useNANDECC) { - /* Careful, this call adds 2 ints */ - /* to the end of the spare data. Calling function */ - /* should allocate enough memory for spare, */ - /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */ - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_oobinfo); - } else { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_noeccinfo); - } - } else { - if (data) - retval = - mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (spare) - retval = - mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, - &dummy, spareAsBytes); - } -#endif - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); + struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; __u32 addr = - ((loff_t) blockNumber) * dev->nDataBytesPerChunk - * dev->nChunksPerBlock; + ((loff_t) blockNumber) * dev->param.totalBytesPerChunk + * dev->param.nChunksPerBlock; struct erase_info ei; + int retval = 0; ei.mtd = mtd; ei.addr = addr; - ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock; + ei.len = dev->param.totalBytesPerChunk * dev->param.nChunksPerBlock; ei.time = 1000; ei.retries = 2; ei.callback = NULL; ei.priv = (u_long) dev; - /* Todo finish off the ei if required */ - - sema_init(&dev->sem, 0); - retval = mtd->erase(mtd, &ei); if (retval == 0) @@ -236,7 +52,7 @@ int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) return YAFFS_FAIL; } -int nandmtd_InitialiseNAND(yaffs_Device * dev) +int nandmtd_InitialiseNAND(yaffs_Device *dev) { return YAFFS_OK; }