[MTD] [OneNAND] main read/write ops support for yaffs2
Now we can use yaffs2 on OneNAND Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Kyungmin Park
David Woodhouse
parent
12f77c9eed
commit
d15057b703
1 changed files with 281 additions and 164 deletions
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@ -763,31 +763,83 @@ static void onenand_release_device(struct mtd_info *mtd)
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}
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/**
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* onenand_read - [MTD Interface] Read data from flash
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* onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
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* @param mtd MTD device structure
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* @param buf destination address
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* @param column oob offset to read from
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* @param thislen oob length to read
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*/
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static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
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int thislen)
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{
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struct onenand_chip *this = mtd->priv;
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struct nand_oobfree *free;
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int readcol = column;
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int readend = column + thislen;
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int lastgap = 0;
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unsigned int i;
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uint8_t *oob_buf = this->oob_buf;
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free = this->ecclayout->oobfree;
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for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
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if (readcol >= lastgap)
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readcol += free->offset - lastgap;
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if (readend >= lastgap)
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readend += free->offset - lastgap;
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lastgap = free->offset + free->length;
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}
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this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
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free = this->ecclayout->oobfree;
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for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
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int free_end = free->offset + free->length;
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if (free->offset < readend && free_end > readcol) {
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int st = max_t(int,free->offset,readcol);
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int ed = min_t(int,free_end,readend);
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int n = ed - st;
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memcpy(buf, oob_buf + st, n);
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buf += n;
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} else if (column == 0)
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break;
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}
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return 0;
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}
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/**
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* onenand_read_ops - [OneNAND Interface] OneNAND read main and/or out-of-band
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* @param mtd MTD device structure
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* @param from offset to read from
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* @param len number of bytes to read
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* @param retlen pointer to variable to store the number of read bytes
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* @param buf the databuffer to put data
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* @param ops: oob operation description structure
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*
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* Read with ecc
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*/
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static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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* OneNAND read main and/or out-of-band data
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*/
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static int onenand_read_ops(struct mtd_info *mtd, loff_t from,
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struct mtd_oob_ops *ops)
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{
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struct onenand_chip *this = mtd->priv;
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struct mtd_ecc_stats stats;
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int read = 0, column;
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int thislen;
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size_t len = ops->len;
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size_t ooblen = ops->ooblen;
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u_char *buf = ops->datbuf;
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u_char *oobbuf = ops->oobbuf;
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int read = 0, column, thislen;
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int oobread = 0, oobcolumn, thisooblen, oobsize;
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int ret = 0, boundary = 0;
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int writesize = this->writesize;
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DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
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DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
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if (ops->mode == MTD_OOB_AUTO)
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oobsize = this->ecclayout->oobavail;
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else
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oobsize = mtd->oobsize;
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oobcolumn = from & (mtd->oobsize - 1);
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/* Do not allow reads past end of device */
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if ((from + len) > mtd->size) {
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printk(KERN_ERR "onenand_read: Attempt read beyond end of device\n");
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*retlen = 0;
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printk(KERN_ERR "onenand_read_ops: Attempt read beyond end of device\n");
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ops->retlen = 0;
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ops->oobretlen = 0;
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return -EINVAL;
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}
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@ -832,6 +884,21 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
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}
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/* While load is going, read from last bufferRAM */
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this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
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/* Read oob area if needed */
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if (oobbuf) {
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thisooblen = oobsize - oobcolumn;
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thisooblen = min_t(int, thisooblen, ooblen - oobread);
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if (ops->mode == MTD_OOB_AUTO)
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onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
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else
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this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
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oobread += thisooblen;
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oobbuf += thisooblen;
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oobcolumn = 0;
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}
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/* See if we are done */
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read += thislen;
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if (read == len)
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@ -857,7 +924,8 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
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* fs driver will take care of that, because
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* retlen == desired len and result == -EBADMSG
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*/
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*retlen = read;
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ops->retlen = read;
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ops->oobretlen = oobread;
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if (mtd->ecc_stats.failed - stats.failed)
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return -EBADMSG;
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@ -868,56 +936,11 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
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return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
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}
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/**
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* onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
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* @param mtd MTD device structure
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* @param buf destination address
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* @param column oob offset to read from
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* @param thislen oob length to read
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*/
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static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
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int thislen)
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{
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struct onenand_chip *this = mtd->priv;
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struct nand_oobfree *free;
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int readcol = column;
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int readend = column + thislen;
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int lastgap = 0;
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unsigned int i;
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uint8_t *oob_buf = this->oob_buf;
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free = this->ecclayout->oobfree;
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for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
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if (readcol >= lastgap)
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readcol += free->offset - lastgap;
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if (readend >= lastgap)
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readend += free->offset - lastgap;
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lastgap = free->offset + free->length;
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}
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this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
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free = this->ecclayout->oobfree;
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for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
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int free_end = free->offset + free->length;
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if (free->offset < readend && free_end > readcol) {
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int st = max_t(int,free->offset,readcol);
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int ed = min_t(int,free_end,readend);
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int n = ed - st;
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memcpy(buf, oob_buf + st, n);
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buf += n;
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} else if (column == 0)
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break;
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}
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return 0;
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}
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/**
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* onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band
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* @param mtd MTD device structure
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* @param from offset to read from
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* @param len number of bytes to read
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* @param retlen pointer to variable to store the number of read bytes
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* @param buf the databuffer to put data
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* @param mode operation mode
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* @param ops: oob operation description structure
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*
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* OneNAND read out-of-band data from the spare area
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*/
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@ -1007,10 +1030,39 @@ static int onenand_do_read_oob(struct mtd_info *mtd, loff_t from,
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}
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/**
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* onenand_read_oob - [MTD Interface] NAND write data and/or out-of-band
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* onenand_read - [MTD Interface] Read data from flash
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* @param mtd MTD device structure
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* @param from offset to read from
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* @param len number of bytes to read
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* @param retlen pointer to variable to store the number of read bytes
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* @param buf the databuffer to put data
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*
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* Read with ecc
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*/
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static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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{
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struct mtd_oob_ops ops = {
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.len = len,
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.ooblen = 0,
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.datbuf = buf,
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.oobbuf = NULL,
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};
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int ret;
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ret = onenand_read_ops(mtd, from, &ops);
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*retlen = ops.retlen;
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return ret;
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}
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/**
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* onenand_read_oob - [MTD Interface] Read main and/or out-of-band
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* @param mtd: MTD device structure
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* @param from: offset to read from
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* @param ops: oob operation description structure
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* Read main and/or out-of-band
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*/
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static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
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struct mtd_oob_ops *ops)
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@ -1024,6 +1076,10 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
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default:
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return -EINVAL;
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}
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if (ops->datbuf)
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return onenand_read_ops(mtd, from, ops);
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return onenand_do_read_oob(mtd, from, ops);
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}
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@ -1148,7 +1204,6 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
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* @param mtd MTD device structure
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* @param buf the databuffer to verify
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* @param to offset to read from
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*
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*/
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static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
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{
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@ -1176,7 +1231,6 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to
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* @param buf the databuffer to verify
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* @param addr offset to read from
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* @param len number of bytes to read and compare
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*
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*/
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static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
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{
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@ -1221,107 +1275,6 @@ static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr,
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#define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
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/**
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* onenand_write - [MTD Interface] write buffer to FLASH
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* @param mtd MTD device structure
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* @param to offset to write to
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* @param len number of bytes to write
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* @param retlen pointer to variable to store the number of written bytes
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* @param buf the data to write
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*
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* Write with ECC
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*/
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static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
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size_t *retlen, const u_char *buf)
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{
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struct onenand_chip *this = mtd->priv;
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int written = 0;
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int ret = 0;
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int column, subpage;
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DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
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/* Initialize retlen, in case of early exit */
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*retlen = 0;
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/* Do not allow writes past end of device */
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if (unlikely((to + len) > mtd->size)) {
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printk(KERN_ERR "onenand_write: Attempt write to past end of device\n");
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return -EINVAL;
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}
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/* Reject writes, which are not page aligned */
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if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
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printk(KERN_ERR "onenand_write: Attempt to write not page aligned data\n");
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return -EINVAL;
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}
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column = to & (mtd->writesize - 1);
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/* Grab the lock and see if the device is available */
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onenand_get_device(mtd, FL_WRITING);
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/* Loop until all data write */
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while (written < len) {
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int thislen = min_t(int, mtd->writesize - column, len - written);
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u_char *wbuf = (u_char *) buf;
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cond_resched();
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this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
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/* Partial page write */
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subpage = thislen < mtd->writesize;
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if (subpage) {
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memset(this->page_buf, 0xff, mtd->writesize);
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memcpy(this->page_buf + column, buf, thislen);
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wbuf = this->page_buf;
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}
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this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
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this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
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this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
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ret = this->wait(mtd, FL_WRITING);
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/* In partial page write we don't update bufferram */
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onenand_update_bufferram(mtd, to, !ret && !subpage);
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if (ONENAND_IS_2PLANE(this)) {
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ONENAND_SET_BUFFERRAM1(this);
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onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
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}
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if (ret) {
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printk(KERN_ERR "onenand_write: write filaed %d\n", ret);
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break;
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}
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/* Only check verify write turn on */
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ret = onenand_verify(mtd, (u_char *) wbuf, to, thislen);
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if (ret) {
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printk(KERN_ERR "onenand_write: verify failed %d\n", ret);
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break;
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}
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written += thislen;
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if (written == len)
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break;
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column = 0;
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to += thislen;
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buf += thislen;
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}
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/* Deselect and wake up anyone waiting on the device */
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onenand_release_device(mtd);
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*retlen = written;
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return ret;
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}
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/**
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* onenand_fill_auto_oob - [Internal] oob auto-placement transfer
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* @param mtd MTD device structure
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@ -1363,6 +1316,139 @@ static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
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return 0;
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}
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/**
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* onenand_write_ops - [OneNAND Interface] write main and/or out-of-band
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* @param mtd MTD device structure
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* @param to offset to write to
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* @param ops oob operation description structure
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*
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* Write main and/or oob with ECC
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*/
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static int onenand_write_ops(struct mtd_info *mtd, loff_t to,
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struct mtd_oob_ops *ops)
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{
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struct onenand_chip *this = mtd->priv;
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int written = 0, column, thislen, subpage;
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int oobwritten = 0, oobcolumn, thisooblen, oobsize;
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size_t len = ops->len;
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size_t ooblen = ops->ooblen;
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const u_char *buf = ops->datbuf;
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const u_char *oob = ops->oobbuf;
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u_char *oobbuf;
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int ret = 0;
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DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
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/* Initialize retlen, in case of early exit */
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ops->retlen = 0;
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ops->oobretlen = 0;
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/* Do not allow writes past end of device */
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if (unlikely((to + len) > mtd->size)) {
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printk(KERN_ERR "onenand_write: Attempt write to past end of device\n");
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return -EINVAL;
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}
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/* Reject writes, which are not page aligned */
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if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
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printk(KERN_ERR "onenand_write: Attempt to write not page aligned data\n");
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return -EINVAL;
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}
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if (ops->mode == MTD_OOB_AUTO)
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oobsize = this->ecclayout->oobavail;
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else
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oobsize = mtd->oobsize;
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oobcolumn = to & (mtd->oobsize - 1);
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column = to & (mtd->writesize - 1);
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/* Grab the lock and see if the device is available */
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onenand_get_device(mtd, FL_WRITING);
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/* Loop until all data write */
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while (written < len) {
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u_char *wbuf = (u_char *) buf;
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thislen = min_t(int, mtd->writesize - column, len - written);
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thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
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cond_resched();
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this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
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/* Partial page write */
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subpage = thislen < mtd->writesize;
|
||||
if (subpage) {
|
||||
memset(this->page_buf, 0xff, mtd->writesize);
|
||||
memcpy(this->page_buf + column, buf, thislen);
|
||||
wbuf = this->page_buf;
|
||||
}
|
||||
|
||||
this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
|
||||
|
||||
if (oob) {
|
||||
oobbuf = this->oob_buf;
|
||||
|
||||
/* We send data to spare ram with oobsize
|
||||
* to prevent byte access */
|
||||
memset(oobbuf, 0xff, mtd->oobsize);
|
||||
if (ops->mode == MTD_OOB_AUTO)
|
||||
onenand_fill_auto_oob(mtd, oobbuf, oob, oobcolumn, thisooblen);
|
||||
else
|
||||
memcpy(oobbuf + oobcolumn, oob, thisooblen);
|
||||
|
||||
oobwritten += thisooblen;
|
||||
oob += thisooblen;
|
||||
oobcolumn = 0;
|
||||
} else
|
||||
oobbuf = (u_char *) ffchars;
|
||||
|
||||
this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
|
||||
|
||||
this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
|
||||
|
||||
ret = this->wait(mtd, FL_WRITING);
|
||||
|
||||
/* In partial page write we don't update bufferram */
|
||||
onenand_update_bufferram(mtd, to, !ret && !subpage);
|
||||
if (ONENAND_IS_2PLANE(this)) {
|
||||
ONENAND_SET_BUFFERRAM1(this);
|
||||
onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
|
||||
}
|
||||
|
||||
if (ret) {
|
||||
printk(KERN_ERR "onenand_write: write filaed %d\n", ret);
|
||||
break;
|
||||
}
|
||||
|
||||
/* Only check verify write turn on */
|
||||
ret = onenand_verify(mtd, (u_char *) wbuf, to, thislen);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "onenand_write: verify failed %d\n", ret);
|
||||
break;
|
||||
}
|
||||
|
||||
written += thislen;
|
||||
|
||||
if (written == len)
|
||||
break;
|
||||
|
||||
column = 0;
|
||||
to += thislen;
|
||||
buf += thislen;
|
||||
}
|
||||
|
||||
/* Deselect and wake up anyone waiting on the device */
|
||||
onenand_release_device(mtd);
|
||||
|
||||
ops->retlen = written;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* onenand_do_write_oob - [Internal] OneNAND write out-of-band
|
||||
* @param mtd MTD device structure
|
||||
|
|
@ -1478,6 +1564,33 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to,
|
|||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* onenand_write - [MTD Interface] write buffer to FLASH
|
||||
* @param mtd MTD device structure
|
||||
* @param to offset to write to
|
||||
* @param len number of bytes to write
|
||||
* @param retlen pointer to variable to store the number of written bytes
|
||||
* @param buf the data to write
|
||||
*
|
||||
* Write with ECC
|
||||
*/
|
||||
static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
|
||||
size_t *retlen, const u_char *buf)
|
||||
{
|
||||
struct mtd_oob_ops ops = {
|
||||
.len = len,
|
||||
.ooblen = 0,
|
||||
.datbuf = (u_char *) buf,
|
||||
.oobbuf = NULL,
|
||||
};
|
||||
int ret;
|
||||
|
||||
ret = onenand_write_ops(mtd, to, &ops);
|
||||
*retlen = ops.retlen;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* onenand_write_oob - [MTD Interface] NAND write data and/or out-of-band
|
||||
* @param mtd: MTD device structure
|
||||
|
|
@ -1496,6 +1609,10 @@ static int onenand_write_oob(struct mtd_info *mtd, loff_t to,
|
|||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (ops->datbuf)
|
||||
return onenand_write_ops(mtd, to, ops);
|
||||
|
||||
return onenand_do_write_oob(mtd, to, ops);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue