X-Git-Url: http://aleph1.co.uk/gitweb/?a=blobdiff_plain;f=direct%2Fu-boot%2Ffs%2Fyaffs2%2Fyaffs_mtdif.c;fp=direct%2Fu-boot%2Ffs%2Fyaffs2%2Fyaffs_mtdif.c;h=6f3a02834f322b0984b6661a7a5a4036eed0bc1b;hb=80f85303d264f804ea288e1995280345804ec01c;hp=0000000000000000000000000000000000000000;hpb=95ff7ef3e08cf76d07b08cce3470d4840b27a8ea;p=yaffs2.git diff --git a/direct/u-boot/fs/yaffs2/yaffs_mtdif.c b/direct/u-boot/fs/yaffs2/yaffs_mtdif.c new file mode 100644 index 0000000..6f3a028 --- /dev/null +++ b/direct/u-boot/fs/yaffs2/yaffs_mtdif.c @@ -0,0 +1,246 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2007 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* XXX U-BOOT XXX */ +#include + +const char *yaffs_mtdif_c_version = + "$Id: yaffs_mtdif.c,v 1.19 2007/02/14 01:09:06 wookey Exp $"; + +#include "yportenv.h" + + +#include "yaffs_mtdif.h" + +#include "linux/mtd/mtd.h" +#include "linux/types.h" +#include "linux/time.h" +#include "linux/mtd/nand.h" + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) +static struct nand_oobinfo yaffs_oobinfo = { + .useecc = 1, + .eccbytes = 6, + .eccpos = {8, 9, 10, 13, 14, 15} +}; + +static struct nand_oobinfo yaffs_noeccinfo = { + .useecc = 0, +}; +#endif + +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) +static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob) +{ + oob[0] = spare->tb0; + oob[1] = spare->tb1; + oob[2] = spare->tb2; + oob[3] = spare->tb3; + oob[4] = spare->tb4; + oob[5] = spare->tb5 & 0x3f; + oob[5] |= spare->block_status == 'Y' ? 0: 0x80; + oob[5] |= spare->page_status == 0 ? 0: 0x40; + oob[6] = spare->tb6; + oob[7] = spare->tb7; +} + +static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob) +{ + struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare; + spare->tb0 = oob[0]; + spare->tb1 = oob[1]; + spare->tb2 = oob[2]; + spare->tb3 = oob[3]; + spare->tb4 = oob[4]; + spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; + spare->block_status = oob[5] & 0x80 ? 0xff : 'Y'; + spare->page_status = oob[5] & 0x40 ? 0xff : 0; + spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; + spare->tb6 = oob[6]; + spare->tb7 = oob[7]; + spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; + + nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ +} +#endif + +int nandmtd_WriteChunkToNAND(struct yaffs_dev * dev, int chunkInNAND, + const u8 * data, const struct yaffs_spare * spare) +{ + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + struct mtd_oob_ops ops; +#endif + size_t dummy; + int retval = 0; + + loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk; +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + u8 spareAsBytes[8]; /* OOB */ + + if (data && !spare) + retval = mtd->write(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data); + else if (spare) { + if (dev->param.use_nand_ecc) { + translate_spare2oob(spare, spareAsBytes); + ops.mode = MTD_OOB_AUTO; + ops.ooblen = 8; /* temp hack */ + } else { + ops.mode = MTD_OOB_RAW; + ops.ooblen = YAFFS_BYTES_PER_SPARE; + } + ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen; + ops.datbuf = (u8 *)data; + ops.ooboffs = 0; + ops.oobbuf = spareAsBytes; + retval = mtd->write_oob(mtd, addr, &ops); + } +#else + u8 *spareAsBytes = (u8 *) spare; + + if (data && spare) { + if (dev->param.use_nand_ecc) + retval = + mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data, spareAsBytes, + &yaffs_oobinfo); + else + retval = + mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data, spareAsBytes, + &yaffs_noeccinfo); + } else { + if (data) + retval = + mtd->write(mtd, addr, dev->data_bytes_per_chunk, &dummy, + data); + if (spare) + retval = + mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, + &dummy, spareAsBytes); + } +#endif + + if (retval == 0) + return YAFFS_OK; + else + return YAFFS_FAIL; +} + +int nandmtd_ReadChunkFromNAND(struct yaffs_dev * dev, int chunkInNAND, u8 * data, + struct yaffs_spare * spare) +{ + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + struct mtd_oob_ops ops; +#endif + size_t dummy; + int retval = 0; + + loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk; +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + u8 spareAsBytes[8]; /* OOB */ + + if (data && !spare) + retval = mtd->read(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data); + else if (spare) { + if (dev->param.use_nand_ecc) { + ops.mode = MTD_OOB_AUTO; + ops.ooblen = 8; /* temp hack */ + } else { + ops.mode = MTD_OOB_RAW; + ops.ooblen = YAFFS_BYTES_PER_SPARE; + } + ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen; + ops.datbuf = data; + ops.ooboffs = 0; + ops.oobbuf = spareAsBytes; + retval = mtd->read_oob(mtd, addr, &ops); + if (dev->param.use_nand_ecc) + translate_oob2spare(spare, spareAsBytes); + } +#else + u8 *spareAsBytes = (u8 *) spare; + + if (data && spare) { + if (dev->param.use_nand_ecc) { + /* Careful, this call adds 2 ints */ + /* to the end of the spare data. Calling function */ + /* should allocate enough memory for spare, */ + /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */ + retval = + mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data, spareAsBytes, + &yaffs_oobinfo); + } else { + retval = + mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data, spareAsBytes, + &yaffs_noeccinfo); + } + } else { + if (data) + retval = + mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy, + data); + if (spare) + retval = + mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, + &dummy, spareAsBytes); + } +#endif + + if (retval == 0) + return YAFFS_OK; + else + return YAFFS_FAIL; +} + +int nandmtd_EraseBlockInNAND(struct yaffs_dev * dev, int blockNumber) +{ + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); + __u32 addr = + ((loff_t) blockNumber) * dev->data_bytes_per_chunk + * dev->param.chunks_per_block; + struct erase_info ei; + int retval = 0; + + ei.mtd = mtd; + ei.addr = addr; + ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block; + ei.time = 1000; + ei.retries = 2; + ei.callback = NULL; + ei.priv = (u_long) dev; + + /* Todo finish off the ei if required */ + +/* XXX U-BOOT XXX */ +#if 0 + sema_init(&dev->sem, 0); +#endif + + retval = mtd->erase(mtd, &ei); + + if (retval == 0) + return YAFFS_OK; + else + return YAFFS_FAIL; +} + +int nandmtd_InitialiseNAND(struct yaffs_dev * dev) +{ + return YAFFS_OK; +}