320 lines
7.9 KiB
C
320 lines
7.9 KiB
C
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/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2011 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* mtd interface for YAFFS2 */
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#include "yportenv.h"
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#include "yaffs_trace.h"
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#include "yaffs_mtdif2.h"
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#include "linux/mtd/mtd.h"
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#include "linux/types.h"
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#include "linux/time.h"
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#include "yaffs_packedtags2.h"
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#include "yaffs_linux.h"
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
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#define MTD_OPS_AUTO_OOB MTD_OOB_AUTO
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//add by lufei
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#define MTD_OPS_RAW_OOB MTD_OOB_RAW
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//end add
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#endif
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/* NB For use with inband tags....
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* We assume that the data buffer is of size total_bytes_per_chunk so
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* that we can also use it to load the tags.
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*/
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int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
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const u8 *data,
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const struct yaffs_ext_tags *tags)
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{
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struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
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#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
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struct mtd_oob_ops ops;
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#else
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size_t dummy;
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#endif
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int retval = 0;
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loff_t addr;
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struct yaffs_packed_tags2 pt;
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int packed_tags_size =
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dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
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void *packed_tags_ptr =
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dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
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yaffs_trace(YAFFS_TRACE_MTD,
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"nandmtd2_write_chunk_tags chunk %d data %p tags %p",
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nand_chunk, data, tags);
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addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
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/* For yaffs2 writing there must be both data and tags.
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* If we're using inband tags, then the tags are stuffed into
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* the end of the data buffer.
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*/
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if (!data || !tags)
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BUG();
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else if (dev->param.inband_tags) {
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struct yaffs_packed_tags2_tags_only *pt2tp;
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pt2tp =
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(struct yaffs_packed_tags2_tags_only *)(data +
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dev->
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data_bytes_per_chunk);
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yaffs_pack_tags2_tags_only(pt2tp, tags);
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} else {
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yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
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}
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
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//add by lufei
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#if defined(CONFIG_MTD_GSC3280_NAND_HWECC)
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ops.mode = MTD_OPS_RAW_OOB;
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ops.ooblen = mtd->oobsize;
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#else
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//ops.mode = MTD_OPS_RAW_OOB;
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ops.mode = MTD_OPS_AUTO_OOB;
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ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
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#endif
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//end
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ops.ooboffs = 0;
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ops.len = dev->param.total_bytes_per_chunk;
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ops.datbuf = (u8 *) data;
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//add by lufei
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#if defined(CONFIG_MTD_GSC3280_NAND_HWECC)
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if(dev->param.no_tags_ecc){
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u8 tagbuffer[mtd->oobsize];
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u8 *ptr=(u8 *)packed_tags_ptr;
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int i ,j;
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memset(tagbuffer,0xff,mtd->oobsize);
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for(i=0,j=0;i<packed_tags_size;i++){
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tagbuffer[i+j*13+45]=ptr[i];
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if((i+1)%3==0) j++;
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}
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ops.oobbuf = (dev->param.inband_tags) ? NULL : tagbuffer;
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retval = mtd->write_oob(mtd, addr, &ops);
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}
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#else
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ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
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retval = mtd->write_oob(mtd, addr, &ops);
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#endif
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//end add
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#else
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if (!dev->param.inband_tags) {
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retval =
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mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
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&dummy, data, (u8 *) packed_tags_ptr, NULL);
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} else {
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retval =
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mtd->write(mtd, addr, dev->param.total_bytes_per_chunk,
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&dummy, data);
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}
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#endif
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
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u8 *data, struct yaffs_ext_tags *tags)
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{
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struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
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#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
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struct mtd_oob_ops ops;
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#endif
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size_t dummy;
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int retval = 0;
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int local_data = 0;
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loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
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struct yaffs_packed_tags2 pt;
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int packed_tags_size =
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dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
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void *packed_tags_ptr =
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dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
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yaffs_trace(YAFFS_TRACE_MTD,
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"nandmtd2_read_chunk_tags chunk %d data %p tags %p",
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nand_chunk, data, tags);
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if (dev->param.inband_tags) {
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if (!data) {
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local_data = 1;
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data = yaffs_get_temp_buffer(dev);
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}
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}
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
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if (dev->param.inband_tags || (data && !tags))
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retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk,
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&dummy, data);
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else if (tags) {
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//add by lufei
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#if defined(CONFIG_MTD_GSC3280_NAND_HWECC)
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ops.mode = MTD_OPS_RAW_OOB;
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ops.ooblen = mtd->oobsize;
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ops.len = data ? dev->data_bytes_per_chunk : mtd->oobsize;
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#else
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//ops.mode = MTD_OPS_RAW_OOB;
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ops.mode = MTD_OPS_AUTO_OOB;
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ops.ooblen = packed_tags_size;
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ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
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#endif
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//end
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ops.ooboffs = 0;
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ops.datbuf = data;
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ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer;
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retval = mtd->read_oob(mtd, addr, &ops);
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}
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#else
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if (!dev->param.inband_tags && data && tags) {
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retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk,
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&dummy, data, dev->spare_buffer, NULL);
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} else {
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if (data)
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retval =
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mtd->read(mtd, addr, dev->data_bytes_per_chunk,
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&dummy, data);
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if (!dev->param.inband_tags && tags)
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retval =
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mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
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dev->spare_buffer);
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}
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#endif
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if (dev->param.inband_tags) {
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if (tags) {
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struct yaffs_packed_tags2_tags_only *pt2tp;
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pt2tp =
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(struct yaffs_packed_tags2_tags_only *)
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&data[dev->data_bytes_per_chunk];
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yaffs_unpack_tags2_tags_only(tags, pt2tp);
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}
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} else {
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if (tags) {
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//add bu lufei
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#ifdef CONFIG_MTD_GSC3280_NAND_HWECC
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if(dev->param.no_tags_ecc){//dev->param.no_tags_ecc must be true
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u8 tagbuffer[mtd->oobsize];
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u8 *ptr=packed_tags_ptr;
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int i ,j ;
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memcpy(tagbuffer,yaffs_dev_to_lc(dev)->spare_buffer,mtd->oobsize);
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for(i=0,j=0;i<packed_tags_size;i++){
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ptr[i] = tagbuffer[i+j*13+45];
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if((i+1)%3==0) j++;
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}
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}
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yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
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#else
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memcpy(packed_tags_ptr,yaffs_dev_to_lc(dev)->spare_buffer,packed_tags_size);
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yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
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#endif
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//end
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}
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}
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if (local_data)
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yaffs_release_temp_buffer(dev, data);
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if (tags && retval == -EBADMSG
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&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
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tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
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dev->n_ecc_unfixed++;
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}
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if (tags && retval == -EUCLEAN
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&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
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tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
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dev->n_ecc_fixed++;
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}
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no)
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{
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struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
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int retval;
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yaffs_trace(YAFFS_TRACE_MTD,
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"nandmtd2_mark_block_bad %d",
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block_no);
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retval =
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mtd->block_markbad(mtd,
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block_no * dev->param.chunks_per_block *
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dev->param.total_bytes_per_chunk);
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_query_block(struct yaffs_dev *dev, int block_no,
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enum yaffs_block_state *state, u32 *seq_number)
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{
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struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
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int retval;
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yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no);
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retval =
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mtd->block_isbad(mtd,
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block_no * dev->param.chunks_per_block *
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dev->param.total_bytes_per_chunk);
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if (retval) {
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yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
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*state = YAFFS_BLOCK_STATE_DEAD;
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*seq_number = 0;
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} else {
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struct yaffs_ext_tags t;
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nandmtd2_read_chunk_tags(dev, block_no *
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dev->param.chunks_per_block, NULL, &t);
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if (t.chunk_used) {
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*seq_number = t.seq_number;
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*state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
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} else {
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*seq_number = 0;
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*state = YAFFS_BLOCK_STATE_EMPTY;
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}
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}
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yaffs_trace(YAFFS_TRACE_MTD,
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"block is bad seq %d state %d",
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*seq_number, *state);
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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