From 7e3644d3cf37cd24c3a295825200743123acbd91 Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Mon, 16 Dec 2013 07:51:19 +0000 Subject: kernel: update yaffs code Use the latest version of the yaffs code. Fetched from the yaffs2 git tree and it is based on the following commit: commit bc76682d93955cfb33051beb503ad9f8a5450578 Merge: 3a8580e ffa781d Author: Charles Manning Date: Thu Jul 11 17:46:25 2013 +1200 Merge branch 'master' of ssh://www.aleph1.co.uk/home/aleph1/git/yaffs2 Signed-off-by: Gabor Juhos SVN-Revision: 39084 --- target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c | 272 ++++++++++++++++++++- 1 file changed, 262 insertions(+), 10 deletions(-) (limited to 'target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c') diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c index b2d4318e66..7ae63c54a9 100644 --- a/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c +++ b/target/linux/generic/files/fs/yaffs2/yaffs_mtdif.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2010 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning @@ -13,24 +13,43 @@ #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" +#include "linux/kernel.h" +#include "linux/version.h" +#include "linux/types.h" +#include "yaffs_trace.h" +#include "yaffs_guts.h" #include "yaffs_linux.h" -int nandmtd_EraseBlockInNAND(yaffs_dev_t *dev, int blockNumber) + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)) +#define MTD_OPS_AUTO_OOB MTD_OOB_AUTO +#endif + + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0)) +#define mtd_erase(m, ei) (m)->erase(m, ei) +#define mtd_write_oob(m, addr, pops) (m)->write_oob(m, addr, pops) +#define mtd_read_oob(m, addr, pops) (m)->read_oob(m, addr, pops) +#define mtd_block_isbad(m, offs) (m)->block_isbad(m, offs) +#define mtd_block_markbad(m, offs) (m)->block_markbad(m, offs) +#endif + + + +int nandmtd_erase_block(struct yaffs_dev *dev, int block_no) { struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - __u32 addr = - ((loff_t) blockNumber) * dev->param.total_bytes_per_chunk - * dev->param.chunks_per_block; + u32 addr = + ((loff_t) block_no) * dev->param.total_bytes_per_chunk * + dev->param.chunks_per_block; struct erase_info ei; - int retval = 0; ei.mtd = mtd; @@ -41,16 +60,249 @@ int nandmtd_EraseBlockInNAND(yaffs_dev_t *dev, int blockNumber) ei.callback = NULL; ei.priv = (u_long) dev; - retval = mtd->erase(mtd, &ei); + retval = mtd_erase(mtd, &ei); if (retval == 0) return YAFFS_OK; - else + + return YAFFS_FAIL; +} + + +static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, int data_len, + const u8 *oob, int oob_len) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + loff_t addr; + struct mtd_oob_ops ops; + int retval; + + yaffs_trace(YAFFS_TRACE_MTD, + "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n", + dev, nand_chunk, data, data_len, oob, oob_len); + + if (!data || !data_len) { + data = NULL; + data_len = 0; + } + + if (!oob || !oob_len) { + oob = NULL; + oob_len = 0; + } + + addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; + memset(&ops, 0, sizeof(ops)); + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = (data) ? data_len : 0; + ops.ooblen = oob_len; + ops.datbuf = (u8 *)data; + ops.oobbuf = (u8 *)oob; + + retval = mtd_write_oob(mtd, addr, &ops); + if (retval) { + yaffs_trace(YAFFS_TRACE_MTD, + "write_oob failed, chunk %d, mtd error %d", + nand_chunk, retval); + } + return retval ? YAFFS_FAIL : YAFFS_OK; +} + +static int yaffs_mtd_read(struct yaffs_dev *dev, int nand_chunk, + u8 *data, int data_len, + u8 *oob, int oob_len, + enum yaffs_ecc_result *ecc_result) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + loff_t addr; + struct mtd_oob_ops ops; + int retval; + + addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; + memset(&ops, 0, sizeof(ops)); + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = (data) ? data_len : 0; + ops.ooblen = oob_len; + ops.datbuf = data; + ops.oobbuf = oob; + +#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20)) + /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug; + * help it out with ops.len = ops.ooblen when ops.datbuf == NULL. + */ + ops.len = (ops.datbuf) ? ops.len : ops.ooblen; +#endif + /* Read page and oob using MTD. + * Check status and determine ECC result. + */ + retval = mtd_read_oob(mtd, addr, &ops); + if (retval) + yaffs_trace(YAFFS_TRACE_MTD, + "read_oob failed, chunk %d, mtd error %d", + nand_chunk, retval); + + switch (retval) { + case 0: + /* no error */ + if(ecc_result) + *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + break; + + case -EUCLEAN: + /* MTD's ECC fixed the data */ + if(ecc_result) + *ecc_result = YAFFS_ECC_RESULT_FIXED; + dev->n_ecc_fixed++; + break; + + case -EBADMSG: + default: + /* MTD's ECC could not fix the data */ + dev->n_ecc_unfixed++; + if(ecc_result) + *ecc_result = YAFFS_ECC_RESULT_UNFIXED; return YAFFS_FAIL; + } + + return YAFFS_OK; } -int nandmtd_InitialiseNAND(yaffs_dev_t *dev) +static int yaffs_mtd_erase(struct yaffs_dev *dev, int block_no) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + + loff_t addr; + struct erase_info ei; + int retval = 0; + u32 block_size; + + block_size = dev->param.total_bytes_per_chunk * + dev->param.chunks_per_block; + addr = ((loff_t) block_no) * block_size; + + ei.mtd = mtd; + ei.addr = addr; + ei.len = block_size; + ei.time = 1000; + ei.retries = 2; + ei.callback = NULL; + ei.priv = (u_long) dev; + + retval = mtd_erase(mtd, &ei); + + if (retval == 0) + return YAFFS_OK; + + return YAFFS_FAIL; +} + +static int yaffs_mtd_mark_bad(struct yaffs_dev *dev, int block_no) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk; + int retval; + + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", block_no); + + retval = mtd_block_markbad(mtd, (loff_t) blocksize * block_no); + return (retval) ? YAFFS_FAIL : YAFFS_OK; +} + +static int yaffs_mtd_check_bad(struct yaffs_dev *dev, int block_no) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk; + int retval; + + yaffs_trace(YAFFS_TRACE_MTD, "checking block %d bad", block_no); + + retval = mtd_block_isbad(mtd, (loff_t) blocksize * block_no); + return (retval) ? YAFFS_FAIL : YAFFS_OK; +} + +static int yaffs_mtd_initialise(struct yaffs_dev *dev) +{ + return YAFFS_OK; +} + +static int yaffs_mtd_deinitialise(struct yaffs_dev *dev) { return YAFFS_OK; } + +void yaffs_mtd_drv_install(struct yaffs_dev *dev) +{ + struct yaffs_driver *drv = &dev->drv; + + drv->drv_write_chunk_fn = yaffs_mtd_write; + drv->drv_read_chunk_fn = yaffs_mtd_read; + drv->drv_erase_fn = yaffs_mtd_erase; + drv->drv_mark_bad_fn = yaffs_mtd_mark_bad; + drv->drv_check_bad_fn = yaffs_mtd_check_bad; + drv->drv_initialise_fn = yaffs_mtd_initialise; + drv->drv_deinitialise_fn = yaffs_mtd_deinitialise; +} + + +struct mtd_info * yaffs_get_mtd_device(dev_t sdev) +{ + struct mtd_info *mtd; + + mtd = yaffs_get_mtd_device(sdev); + + /* Check it's an mtd device..... */ + if (MAJOR(sdev) != MTD_BLOCK_MAJOR) + return NULL; /* This isn't an mtd device */ + + /* Check it's NAND */ + if (mtd->type != MTD_NANDFLASH) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: MTD device is not NAND it's type %d", + mtd->type); + return NULL; + } + + yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd)); + yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize); + yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize); +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) + yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size); +#else + yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size); +#endif + + return mtd; +} + +int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags) +{ + if (yaffs_version == 2) { + if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || + mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && + !inband_tags) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not have the right page sizes" + ); + return -1; + } + } else { + if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || + mtd->oobsize != YAFFS_BYTES_PER_SPARE) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support have the right page sizes" + ); + return -1; + } + } + + return 0; +} + + +void yaffs_put_mtd_device(struct mtd_info *mtd) +{ + if(mtd) + put_mtd_device(mtd); +} -- cgit v1.2.3