[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>
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 45bc1433..40d8d6f 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -763,31 +763,83 @@
}
/**
- * onenand_read - [MTD Interface] Read data from flash
+ * onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
+ * @param mtd MTD device structure
+ * @param buf destination address
+ * @param column oob offset to read from
+ * @param thislen oob length to read
+ */
+static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
+ int thislen)
+{
+ struct onenand_chip *this = mtd->priv;
+ struct nand_oobfree *free;
+ int readcol = column;
+ int readend = column + thislen;
+ int lastgap = 0;
+ unsigned int i;
+ uint8_t *oob_buf = this->oob_buf;
+
+ free = this->ecclayout->oobfree;
+ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
+ if (readcol >= lastgap)
+ readcol += free->offset - lastgap;
+ if (readend >= lastgap)
+ readend += free->offset - lastgap;
+ lastgap = free->offset + free->length;
+ }
+ this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
+ free = this->ecclayout->oobfree;
+ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
+ int free_end = free->offset + free->length;
+ if (free->offset < readend && free_end > readcol) {
+ int st = max_t(int,free->offset,readcol);
+ int ed = min_t(int,free_end,readend);
+ int n = ed - st;
+ memcpy(buf, oob_buf + st, n);
+ buf += n;
+ } else if (column == 0)
+ break;
+ }
+ return 0;
+}
+
+/**
+ * onenand_read_ops - [OneNAND Interface] OneNAND read main and/or out-of-band
* @param mtd MTD device structure
* @param from offset to read from
- * @param len number of bytes to read
- * @param retlen pointer to variable to store the number of read bytes
- * @param buf the databuffer to put data
+ * @param ops: oob operation description structure
*
- * Read with ecc
-*/
-static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+ * OneNAND read main and/or out-of-band data
+ */
+static int onenand_read_ops(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
struct mtd_ecc_stats stats;
- int read = 0, column;
- int thislen;
+ size_t len = ops->len;
+ size_t ooblen = ops->ooblen;
+ u_char *buf = ops->datbuf;
+ u_char *oobbuf = ops->oobbuf;
+ int read = 0, column, thislen;
+ int oobread = 0, oobcolumn, thisooblen, oobsize;
int ret = 0, boundary = 0;
int writesize = this->writesize;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+
+ if (ops->mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ oobcolumn = from & (mtd->oobsize - 1);
/* Do not allow reads past end of device */
if ((from + len) > mtd->size) {
- printk(KERN_ERR "onenand_read: Attempt read beyond end of device\n");
- *retlen = 0;
+ printk(KERN_ERR "onenand_read_ops: Attempt read beyond end of device\n");
+ ops->retlen = 0;
+ ops->oobretlen = 0;
return -EINVAL;
}
@@ -832,6 +884,21 @@
}
/* While load is going, read from last bufferRAM */
this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
+
+ /* Read oob area if needed */
+ if (oobbuf) {
+ thisooblen = oobsize - oobcolumn;
+ thisooblen = min_t(int, thisooblen, ooblen - oobread);
+
+ if (ops->mode == MTD_OOB_AUTO)
+ onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
+ else
+ this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
+ oobread += thisooblen;
+ oobbuf += thisooblen;
+ oobcolumn = 0;
+ }
+
/* See if we are done */
read += thislen;
if (read == len)
@@ -857,7 +924,8 @@
* fs driver will take care of that, because
* retlen == desired len and result == -EBADMSG
*/
- *retlen = read;
+ ops->retlen = read;
+ ops->oobretlen = oobread;
if (mtd->ecc_stats.failed - stats.failed)
return -EBADMSG;
@@ -869,55 +937,10 @@
}
/**
- * onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
- * @param mtd MTD device structure
- * @param buf destination address
- * @param column oob offset to read from
- * @param thislen oob length to read
- */
-static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
- int thislen)
-{
- struct onenand_chip *this = mtd->priv;
- struct nand_oobfree *free;
- int readcol = column;
- int readend = column + thislen;
- int lastgap = 0;
- unsigned int i;
- uint8_t *oob_buf = this->oob_buf;
-
- free = this->ecclayout->oobfree;
- for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
- if (readcol >= lastgap)
- readcol += free->offset - lastgap;
- if (readend >= lastgap)
- readend += free->offset - lastgap;
- lastgap = free->offset + free->length;
- }
- this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
- free = this->ecclayout->oobfree;
- for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
- int free_end = free->offset + free->length;
- if (free->offset < readend && free_end > readcol) {
- int st = max_t(int,free->offset,readcol);
- int ed = min_t(int,free_end,readend);
- int n = ed - st;
- memcpy(buf, oob_buf + st, n);
- buf += n;
- } else if (column == 0)
- break;
- }
- return 0;
-}
-
-/**
* onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band
* @param mtd MTD device structure
* @param from offset to read from
- * @param len number of bytes to read
- * @param retlen pointer to variable to store the number of read bytes
- * @param buf the databuffer to put data
- * @param mode operation mode
+ * @param ops: oob operation description structure
*
* OneNAND read out-of-band data from the spare area
*/
@@ -1007,10 +1030,39 @@
}
/**
- * onenand_read_oob - [MTD Interface] NAND write data and/or out-of-band
+ * onenand_read - [MTD Interface] Read data from flash
+ * @param mtd MTD device structure
+ * @param from offset to read from
+ * @param len number of bytes to read
+ * @param retlen pointer to variable to store the number of read bytes
+ * @param buf the databuffer to put data
+ *
+ * Read with ecc
+*/
+static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct mtd_oob_ops ops = {
+ .len = len,
+ .ooblen = 0,
+ .datbuf = buf,
+ .oobbuf = NULL,
+ };
+ int ret;
+
+ ret = onenand_read_ops(mtd, from, &ops);
+ *retlen = ops.retlen;
+
+ return ret;
+}
+
+/**
+ * onenand_read_oob - [MTD Interface] Read main and/or out-of-band
* @param mtd: MTD device structure
* @param from: offset to read from
* @param ops: oob operation description structure
+
+ * Read main and/or out-of-band
*/
static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
@@ -1024,6 +1076,10 @@
default:
return -EINVAL;
}
+
+ if (ops->datbuf)
+ return onenand_read_ops(mtd, from, ops);
+
return onenand_do_read_oob(mtd, from, ops);
}
@@ -1148,7 +1204,6 @@
* @param mtd MTD device structure
* @param buf the databuffer to verify
* @param to offset to read from
- *
*/
static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
{
@@ -1176,7 +1231,6 @@
* @param buf the databuffer to verify
* @param addr offset to read from
* @param len number of bytes to read and compare
- *
*/
static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
{
@@ -1222,107 +1276,6 @@
#define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
/**
- * 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 onenand_chip *this = mtd->priv;
- int written = 0;
- int ret = 0;
- int column, subpage;
-
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
-
- /* Initialize retlen, in case of early exit */
- *retlen = 0;
-
- /* Do not allow writes past end of device */
- if (unlikely((to + len) > mtd->size)) {
- printk(KERN_ERR "onenand_write: Attempt write to past end of device\n");
- return -EINVAL;
- }
-
- /* Reject writes, which are not page aligned */
- if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
- printk(KERN_ERR "onenand_write: Attempt to write not page aligned data\n");
- return -EINVAL;
- }
-
- column = to & (mtd->writesize - 1);
-
- /* Grab the lock and see if the device is available */
- onenand_get_device(mtd, FL_WRITING);
-
- /* Loop until all data write */
- while (written < len) {
- int thislen = min_t(int, mtd->writesize - column, len - written);
- u_char *wbuf = (u_char *) buf;
-
- cond_resched();
-
- this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
-
- /* Partial page write */
- 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);
- this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 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);
-
- *retlen = written;
-
- return ret;
-}
-
-/**
* onenand_fill_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
* @param oob_buf oob buffer
@@ -1364,6 +1317,139 @@
}
/**
+ * onenand_write_ops - [OneNAND Interface] write main and/or out-of-band
+ * @param mtd MTD device structure
+ * @param to offset to write to
+ * @param ops oob operation description structure
+ *
+ * Write main and/or oob with ECC
+ */
+static int onenand_write_ops(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ struct onenand_chip *this = mtd->priv;
+ int written = 0, column, thislen, subpage;
+ int oobwritten = 0, oobcolumn, thisooblen, oobsize;
+ size_t len = ops->len;
+ size_t ooblen = ops->ooblen;
+ const u_char *buf = ops->datbuf;
+ const u_char *oob = ops->oobbuf;
+ u_char *oobbuf;
+ int ret = 0;
+
+ DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
+
+ /* Initialize retlen, in case of early exit */
+ ops->retlen = 0;
+ ops->oobretlen = 0;
+
+ /* Do not allow writes past end of device */
+ if (unlikely((to + len) > mtd->size)) {
+ printk(KERN_ERR "onenand_write: Attempt write to past end of device\n");
+ return -EINVAL;
+ }
+
+ /* Reject writes, which are not page aligned */
+ if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
+ printk(KERN_ERR "onenand_write: Attempt to write not page aligned data\n");
+ return -EINVAL;
+ }
+
+ if (ops->mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ oobcolumn = to & (mtd->oobsize - 1);
+
+ column = to & (mtd->writesize - 1);
+
+ /* Grab the lock and see if the device is available */
+ onenand_get_device(mtd, FL_WRITING);
+
+ /* Loop until all data write */
+ while (written < len) {
+ u_char *wbuf = (u_char *) buf;
+
+ thislen = min_t(int, mtd->writesize - column, len - written);
+ thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
+
+ cond_resched();
+
+ this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
+
+ /* Partial page write */
+ 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
* @param to offset to write to
@@ -1479,6 +1565,33 @@
}
/**
+ * 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
* @param to: offset to write
@@ -1496,6 +1609,10 @@
default:
return -EINVAL;
}
+
+ if (ops->datbuf)
+ return onenand_write_ops(mtd, to, ops);
+
return onenand_do_write_oob(mtd, to, ops);
}