* Copyright (C) 2005-2007 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
+ * Credits:
+ * Adrian Hunter <ext-adrian.hunter@nokia.com>:
+ * auto-placement support, read-while load support, various fixes
+ * Copyright (C) Nokia Corporation, 2007
+ *
* 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.
}
/**
- * onenand_read_ecc - [MTD Interface] Read data with ECC
+ * 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_nolock - [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 oob_buf filesystem supplied oob data buffer
- * @param oobsel oob selection structure
+ * @param ops oob operation description structure
*
- * OneNAND read with ECC
+ * OneNAND read main and/or out-of-band data
*/
-static int onenand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf,
- u_char * oob_buf, struct nand_oobinfo *oobsel)
+static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
- int read = 0, column;
- int thislen;
- int ret = 0;
+ struct mtd_ecc_stats stats;
+ 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;
+
+ MTDDEBUG(MTD_DEBUG_LEVEL3,
+ "onenand_read_ops_nolock: 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;
- MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_read_ecc: "
- "from = 0x%08x, len = %i\n",
- (unsigned int)from, (int)len);
+ oobcolumn = from & (mtd->oobsize - 1);
/* Do not allow reads past end of device */
if ((from + len) > mtd->size) {
- MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_read_ecc: "
- "Attempt read beyond end of device\n");
- *retlen = 0;
+ printk(KERN_ERR "onenand_read_ops_nolock: Attempt read beyond end of device\n");
+ ops->retlen = 0;
+ ops->oobretlen = 0;
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- onenand_get_device(mtd, FL_READING);
+ stats = mtd->ecc_stats;
- while (read < len) {
- thislen = min_t(int, mtd->writesize, len - read);
-
- column = from & (mtd->writesize - 1);
- if (column + thislen > mtd->writesize)
- thislen = mtd->writesize - column;
+ /* Read-while-load method */
+ /* Do first load to bufferRAM */
+ if (read < len) {
if (!onenand_check_bufferram(mtd, from)) {
- this->command(mtd, ONENAND_CMD_READ, from,
- mtd->writesize);
+ this->command(mtd, ONENAND_CMD_READ, from, writesize);
ret = this->wait(mtd, FL_READING);
- /* First copy data and check return value for ECC handling */
- onenand_update_bufferram(mtd, from, 1);
+ onenand_update_bufferram(mtd, from, !ret);
+ if (ret == -EBADMSG)
+ ret = 0;
}
+ }
- this->read_bufferram(mtd, ONENAND_DATARAM, buf, column,
- thislen);
+ thislen = min_t(int, writesize, len - read);
+ column = from & (writesize - 1);
+ if (column + thislen > writesize)
+ thislen = writesize - column;
- read += thislen;
- if (read == len)
- break;
+ while (!ret) {
+ /* If there is more to load then start next load */
+ from += thislen;
+ if (read + thislen < len) {
+ this->command(mtd, ONENAND_CMD_READ, from, writesize);
+ /*
+ * Chip boundary handling in DDP
+ * Now we issued chip 1 read and pointed chip 1
+ * bufferam so we have to point chip 0 bufferam.
+ */
+ if (ONENAND_IS_DDP(this) &&
+ unlikely(from == (this->chipsize >> 1))) {
+ this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
+ boundary = 1;
+ } else
+ boundary = 0;
+ ONENAND_SET_PREV_BUFFERRAM(this);
+ }
- if (ret) {
- MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_read_ecc: read failed = %d\n", ret);
- break;
+ /* 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;
}
- from += thislen;
+ /* See if we are done */
+ read += thislen;
+ if (read == len)
+ break;
+ /* Set up for next read from bufferRAM */
+ if (unlikely(boundary))
+ this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
+ ONENAND_SET_NEXT_BUFFERRAM(this);
buf += thislen;
- }
+ thislen = min_t(int, writesize, len - read);
+ column = 0;
- /* Deselect and wake up anyone waiting on the device */
- onenand_release_device(mtd);
+ /* Now wait for load */
+ ret = this->wait(mtd, FL_READING);
+ onenand_update_bufferram(mtd, from, !ret);
+ if (ret == -EBADMSG)
+ ret = 0;
+ }
/*
* Return success, if no ECC failures, else -EBADMSG
* fs driver will take care of that, because
* retlen == desired len and result == -EBADMSG
*/
- *retlen = read;
- return ret;
+ ops->retlen = read;
+ ops->oobretlen = oobread;
+
+ if (ret)
+ return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
+}
+
+/**
+ * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
+ * @param mtd MTD device structure
+ * @param from offset to read from
+ * @param ops oob operation description structure
+ *
+ * OneNAND read out-of-band data from the spare area
+ */
+static int onenand_read_oob_nolock(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, thislen, column, oobsize;
+ size_t len = ops->ooblen;
+ mtd_oob_mode_t mode = ops->mode;
+ u_char *buf = ops->oobbuf;
+ int ret = 0;
+
+ from += ops->ooboffs;
+
+ MTDDEBUG(MTD_DEBUG_LEVEL3,
+ "onenand_read_oob_nolock: from = 0x%08x, len = %i\n",
+ (unsigned int) from, (int) len);
+
+ /* Initialize return length value */
+ ops->oobretlen = 0;
+
+ if (mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ column = from & (mtd->oobsize - 1);
+
+ if (unlikely(column >= oobsize)) {
+ printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow reads past end of device */
+ if (unlikely(from >= mtd->size ||
+ column + len > ((mtd->size >> this->page_shift) -
+ (from >> this->page_shift)) * oobsize)) {
+ printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
+ return -EINVAL;
+ }
+
+ stats = mtd->ecc_stats;
+
+ while (read < len) {
+ thislen = oobsize - column;
+ thislen = min_t(int, thislen, len);
+
+ this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
+
+ onenand_update_bufferram(mtd, from, 0);
+
+ ret = this->wait(mtd, FL_READING);
+ if (ret && ret != -EBADMSG) {
+ printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
+ break;
+ }
+
+ if (mode == MTD_OOB_AUTO)
+ onenand_transfer_auto_oob(mtd, buf, column, thislen);
+ else
+ this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
+
+ read += thislen;
+
+ if (read == len)
+ break;
+
+ buf += thislen;
+
+ /* Read more? */
+ if (read < len) {
+ /* Page size */
+ from += mtd->writesize;
+ column = 0;
+ }
+ }
+
+ ops->oobretlen = read;
+
+ if (ret)
+ return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return 0;
}
/**
int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t * retlen, u_char * buf)
{
- return onenand_read_ecc(mtd, from, len, retlen, buf, NULL, NULL);
+ struct mtd_oob_ops ops = {
+ .len = len,
+ .ooblen = 0,
+ .datbuf = buf,
+ .oobbuf = NULL,
+ };
+ int ret;
+
+ onenand_get_device(mtd, FL_READING);
+ ret = onenand_read_ops_nolock(mtd, from, &ops);
+ onenand_release_device(mtd);
+
+ *retlen = ops.retlen;
+ return ret;
}
/**
* onenand_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 ops oob operations description structure
*
- * OneNAND read out-of-band data from the spare area
+ * OneNAND main and/or out-of-band
*/
-int onenand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char * buf)
+int onenand_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ int ret;
+
+ switch (ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ break;
+ case MTD_OOB_RAW:
+ /* Not implemented yet */
+ default:
+ return -EINVAL;
+ }
+
+ onenand_get_device(mtd, FL_READING);
+ if (ops->datbuf)
+ ret = onenand_read_ops_nolock(mtd, from, ops);
+ else
+ ret = onenand_read_oob_nolock(mtd, from, ops);
+ onenand_release_device(mtd);
+
+ return ret;
+}
+
+/**
+ * onenand_bbt_wait - [DEFAULT] wait until the command is done
+ * @param mtd MTD device structure
+ * @param state state to select the max. timeout value
+ *
+ * Wait for command done.
+ */
+static int onenand_bbt_wait(struct mtd_info *mtd, int state)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned int flags = ONENAND_INT_MASTER;
+ unsigned int interrupt;
+ unsigned int ctrl;
+
+ while (1) {
+ interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
+ if (interrupt & flags)
+ break;
+ }
+
+ /* To get correct interrupt status in timeout case */
+ interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
+ ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
+
+ /* Initial bad block case: 0x2400 or 0x0400 */
+ if (ctrl & ONENAND_CTRL_ERROR) {
+ printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
+ return ONENAND_BBT_READ_ERROR;
+ }
+
+ if (interrupt & ONENAND_INT_READ) {
+ int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
+ if (ecc & ONENAND_ECC_2BIT_ALL)
+ return ONENAND_BBT_READ_ERROR;
+ } else {
+ printk(KERN_ERR "onenand_bbt_wait: read timeout!"
+ "ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
+ return ONENAND_BBT_READ_FATAL_ERROR;
+ }
+
+ return 0;
+}
+
+/**
+ * onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
+ * @param mtd MTD device structure
+ * @param from offset to read from
+ * @param ops oob operation description structure
+ *
+ * OneNAND read out-of-band data from the spare area for bbt scan
+ */
+int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
int read = 0, thislen, column;
int ret = 0;
+ size_t len = ops->ooblen;
+ u_char *buf = ops->oobbuf;
- MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_read_oob: "
- "from = 0x%08x, len = %i\n",
- (unsigned int)from, (int)len);
+ MTDDEBUG(MTD_DEBUG_LEVEL3,
+ "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n",
+ (unsigned int) from, len);
- /* Initialize return length value */
- *retlen = 0;
+ /* Initialize return value */
+ ops->oobretlen = 0;
/* Do not allow reads past end of device */
if (unlikely((from + len) > mtd->size)) {
- MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_read_oob: "
- "Attempt read beyond end of device\n");
- return -EINVAL;
+ printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
+ return ONENAND_BBT_READ_FATAL_ERROR;
}
/* Grab the lock and see if the device is available */
column = from & (mtd->oobsize - 1);
while (read < len) {
+
thislen = mtd->oobsize - column;
thislen = min_t(int, thislen, len);
onenand_update_bufferram(mtd, from, 0);
- ret = this->wait(mtd, FL_READING);
- /* First copy data and check return value for ECC handling */
-
- this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column,
- thislen);
+ ret = onenand_bbt_wait(mtd, FL_READING);
+ if (ret)
+ break;
+ this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
read += thislen;
if (read == len)
break;
- if (ret) {
- MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_read_oob: read failed = %d\n", ret);
- break;
- }
-
buf += thislen;
+
/* Read more? */
if (read < len) {
- /* Page size */
- from += mtd->writesize;
+ /* Update Page size */
+ from += this->writesize;
column = 0;
}
}
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
- *retlen = read;
+ ops->oobretlen = read;
return ret;
}
+
#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
/**
- * onenand_verify_page - [GENERIC] verify the chip contents after a write
- * @param mtd MTD device structure
- * @param buf the databuffer to verify
- *
- * Check DataRAM area directly
+ * onenand_verify_oob - [GENERIC] verify the oob contents after a write
+ * @param mtd MTD device structure
+ * @param buf the databuffer to verify
+ * @param to offset to read from
*/
-static int onenand_verify_page(struct mtd_info *mtd, u_char * buf,
- loff_t addr)
+static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
{
struct onenand_chip *this = mtd->priv;
- void __iomem *dataram0, *dataram1;
+ u_char *oob_buf = this->oob_buf;
+ int status, i;
+
+ this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
+ onenand_update_bufferram(mtd, to, 0);
+ status = this->wait(mtd, FL_READING);
+ if (status)
+ return status;
+
+ this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
+ for (i = 0; i < mtd->oobsize; i++)
+ if (buf[i] != 0xFF && buf[i] != oob_buf[i])
+ return -EBADMSG;
+
+ return 0;
+}
+
+/**
+ * onenand_verify - [GENERIC] verify the chip contents after a write
+ * @param mtd MTD device structure
+ * @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)
+{
+ struct onenand_chip *this = mtd->priv;
+ void __iomem *dataram;
int ret = 0;
+ int thislen, column;
- this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize);
+ while (len != 0) {
+ thislen = min_t(int, this->writesize, len);
+ column = addr & (this->writesize - 1);
+ if (column + thislen > this->writesize)
+ thislen = this->writesize - column;
- ret = this->wait(mtd, FL_READING);
- if (ret)
- return ret;
+ this->command(mtd, ONENAND_CMD_READ, addr, this->writesize);
- onenand_update_bufferram(mtd, addr, 1);
+ onenand_update_bufferram(mtd, addr, 0);
- /* Check, if the two dataram areas are same */
- dataram0 = this->base + ONENAND_DATARAM;
- dataram1 = dataram0 + mtd->writesize;
+ ret = this->wait(mtd, FL_READING);
+ if (ret)
+ return ret;
- if (memcmp(dataram0, dataram1, mtd->writesize))
- return -EBADMSG;
+ onenand_update_bufferram(mtd, addr, 1);
+
+ dataram = this->base + ONENAND_DATARAM;
+ dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
+
+ if (memcmp(buf, dataram + column, thislen))
+ return -EBADMSG;
+
+ len -= thislen;
+ buf += thislen;
+ addr += thislen;
+ }
return 0;
}
#else
-#define onenand_verify_page(...) (0)
+#define onenand_verify(...) (0)
+#define onenand_verify_oob(...) (0)
#endif
#define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0)
/**
- * onenand_write_ecc - [MTD Interface] OneNAND write with ECC
- * @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
- * @param eccbuf filesystem supplied oob data buffer
- * @param oobsel oob selection structure
+ * onenand_fill_auto_oob - [Internal] oob auto-placement transfer
+ * @param mtd MTD device structure
+ * @param oob_buf oob buffer
+ * @param buf source address
+ * @param column oob offset to write to
+ * @param thislen oob length to write
+ */
+static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
+ const u_char *buf, int column, int thislen)
+{
+ struct onenand_chip *this = mtd->priv;
+ struct nand_oobfree *free;
+ int writecol = column;
+ int writeend = column + thislen;
+ int lastgap = 0;
+ unsigned int i;
+
+ free = this->ecclayout->oobfree;
+ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
+ if (writecol >= lastgap)
+ writecol += free->offset - lastgap;
+ if (writeend >= lastgap)
+ writeend += free->offset - lastgap;
+ lastgap = free->offset + free->length;
+ }
+ 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 < writeend && free_end > writecol) {
+ int st = max_t(int,free->offset,writecol);
+ int ed = min_t(int,free_end,writeend);
+ int n = ed - st;
+ memcpy(oob_buf + st, buf, n);
+ buf += n;
+ } else if (column == 0)
+ break;
+ }
+ return 0;
+}
+
+/**
+ * onenand_write_ops_nolock - [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
*
- * OneNAND write with ECC
+ * Write main and/or oob with ECC
*/
-static int onenand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf,
- u_char * eccbuf, struct nand_oobinfo *oobsel)
+static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
- int written = 0;
+ 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;
- MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_write_ecc: "
- "to = 0x%08x, len = %i\n",
- (unsigned int)to, (int)len);
+ MTDDEBUG(MTD_DEBUG_LEVEL3,
+ "onenand_write_ops_nolock: to = 0x%08x, len = %i\n",
+ (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
- *retlen = 0;
+ ops->retlen = 0;
+ ops->oobretlen = 0;
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
- MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_write_ecc: "
- "Attempt write to past end of device\n");
+ printk(KERN_ERR "onenand_write_ops_nolock: Attempt write to past end of device\n");
return -EINVAL;
}
/* Reject writes, which are not page aligned */
- if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
- MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_write_ecc: "
- "Attempt to write not page aligned data\n");
+ if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
+ printk(KERN_ERR "onenand_write_ops_nolock: Attempt to write not page aligned data\n");
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- onenand_get_device(mtd, FL_WRITING);
+ if (ops->mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ oobcolumn = to & (mtd->oobsize - 1);
+
+ column = to & (mtd->writesize - 1);
/* Loop until all data write */
while (written < len) {
- int thislen = min_t(int, mtd->writesize, len - written);
+ u_char *wbuf = (u_char *) buf;
- this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize);
+ thislen = min_t(int, mtd->writesize - column, len - written);
+ thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
- this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen);
- this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0,
- mtd->oobsize);
+ this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
- this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
+ /* 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;
- onenand_update_bufferram(mtd, to, 1);
+ /* 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) {
- MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_write_ecc: write filaed %d\n", ret);
+ printk(KERN_ERR "onenand_write_ops_nolock: write filaed %d\n", ret);
break;
}
- written += thislen;
-
/* Only check verify write turn on */
- ret = onenand_verify_page(mtd, (u_char *) buf, to);
+ ret = onenand_verify(mtd, buf, to, thislen);
if (ret) {
- MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_write_ecc: verify failed %d\n", ret);
+ printk(KERN_ERR "onenand_write_ops_nolock: 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;
+ ops->retlen = written;
return ret;
}
/**
- * onenand_write - [MTD Interface] compability function for onenand_write_ecc
- * @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
- *
- * This function simply calls onenand_write_ecc
- * with oob buffer and oobsel = NULL
- */
-int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf)
-{
- return onenand_write_ecc(mtd, to, len, retlen, buf, NULL, NULL);
-}
-
-/**
- * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
- * @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
+ * onenand_write_oob_nolock - [Internal] OneNAND write out-of-band
+ * @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
+ * @param mode operation mode
*
* OneNAND write out-of-band
*/
-int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
- size_t * retlen, const u_char * buf)
+static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
- int column, status;
+ int column, ret = 0, oobsize;
int written = 0;
+ u_char *oobbuf;
+ size_t len = ops->ooblen;
+ const u_char *buf = ops->oobbuf;
+ mtd_oob_mode_t mode = ops->mode;
- MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_write_oob: "
- "to = 0x%08x, len = %i\n",
- (unsigned int)to, (int)len);
+ to += ops->ooboffs;
+
+ MTDDEBUG(MTD_DEBUG_LEVEL3,
+ "onenand_write_oob_nolock: to = 0x%08x, len = %i\n",
+ (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
- *retlen = 0;
+ ops->oobretlen = 0;
- /* Do not allow writes past end of device */
- if (unlikely((to + len) > mtd->size)) {
- MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_write_oob: "
- "Attempt write to past end of device\n");
+ if (mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ column = to & (mtd->oobsize - 1);
+
+ if (unlikely(column >= oobsize)) {
+ printk(KERN_ERR "onenand_write_oob_nolock: Attempted to start write outside oob\n");
return -EINVAL;
}
- /* Grab the lock and see if the device is available */
- onenand_get_device(mtd, FL_WRITING);
+ /* For compatibility with NAND: Do not allow write past end of page */
+ if (unlikely(column + len > oobsize)) {
+ printk(KERN_ERR "onenand_write_oob_nolock: "
+ "Attempt to write past end of page\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow reads past end of device */
+ if (unlikely(to >= mtd->size ||
+ column + len > ((mtd->size >> this->page_shift) -
+ (to >> this->page_shift)) * oobsize)) {
+ printk(KERN_ERR "onenand_write_oob_nolock: Attempted to write past end of device\n");
+ return -EINVAL;
+ }
+
+ oobbuf = this->oob_buf;
/* Loop until all data write */
while (written < len) {
- int thislen = min_t(int, mtd->oobsize, len - written);
-
- column = to & (mtd->oobsize - 1);
+ int thislen = min_t(int, oobsize, len - written);
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
- this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0,
- mtd->oobsize);
- this->write_bufferram(mtd, ONENAND_SPARERAM, buf, column,
- thislen);
+ /* We send data to spare ram with oobsize
+ * to prevent byte access */
+ memset(oobbuf, 0xff, mtd->oobsize);
+ if (mode == MTD_OOB_AUTO)
+ onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
+ else
+ memcpy(oobbuf + column, buf, thislen);
+ this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
onenand_update_bufferram(mtd, to, 0);
+ if (ONENAND_IS_2PLANE(this)) {
+ ONENAND_SET_BUFFERRAM1(this);
+ onenand_update_bufferram(mtd, to + this->writesize, 0);
+ }
- status = this->wait(mtd, FL_WRITING);
- if (status)
+ ret = this->wait(mtd, FL_WRITING);
+ if (ret) {
+ printk(KERN_ERR "onenand_write_oob_nolock: write failed %d\n", ret);
break;
+ }
+
+ ret = onenand_verify_oob(mtd, oobbuf, to);
+ if (ret) {
+ printk(KERN_ERR "onenand_write_oob_nolock: verify failed %d\n", ret);
+ break;
+ }
written += thislen;
if (written == len)
break;
- to += thislen;
+ to += mtd->writesize;
buf += thislen;
+ column = 0;
}
- /* Deselect and wake up anyone waiting on the device */
+ ops->oobretlen = written;
+
+ return ret;
+}
+
+/**
+ * onenand_write - [MTD Interface] compability function for onenand_write_ecc
+ * @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
+ */
+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;
+
+ onenand_get_device(mtd, FL_WRITING);
+ ret = onenand_write_ops_nolock(mtd, to, &ops);
onenand_release_device(mtd);
- *retlen = written;
+ *retlen = ops.retlen;
+ return ret;
+}
+
+/**
+ * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
+ * @param mtd MTD device structure
+ * @param to offset to write to
+ * @param ops oob operation description structure
+ *
+ * OneNAND write main and/or out-of-band
+ */
+int onenand_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ int ret;
+
+ switch (ops->mode) {
+ case MTD_OOB_PLACE:
+ case MTD_OOB_AUTO:
+ break;
+ case MTD_OOB_RAW:
+ /* Not implemented yet */
+ default:
+ return -EINVAL;
+ }
+
+ onenand_get_device(mtd, FL_WRITING);
+ if (ops->datbuf)
+ ret = onenand_write_ops_nolock(mtd, to, ops);
+ else
+ ret = onenand_write_oob_nolock(mtd, to, ops);
+ onenand_release_device(mtd);
+
+ return ret;
- return 0;
}
/**
int len;
int ret = 0;
- MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n",
- (unsigned int)instr->addr, (unsigned int)instr->len);
+ MTDDEBUG (MTD_DEBUG_LEVEL3,
+ "onenand_erase: start = 0x%08x, len = %i\n",
+ (unsigned int)instr->addr, (unsigned int)ins tr->len);
block_size = (1 << this->erase_shift);
/* Start address must align on block boundary */
if (unlikely(instr->addr & (block_size - 1))) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_erase: Unaligned address\n");
+ "onenand_erase: Unaligned address\n");
return -EINVAL;
}
/* Length must align on block boundary */
if (unlikely(instr->len & (block_size - 1))) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_erase: Length not block aligned\n");
+ "onenand_erase: Length not block aligned\n");
return -EINVAL;
}
/* Do not allow erase past end of device */
if (unlikely((instr->len + instr->addr) > mtd->size)) {
MTDDEBUG (MTD_DEBUG_LEVEL0,
- "onenand_erase: Erase past end of device\n");
+ "onenand_erase: Erase past end of device\n");
return -EINVAL;
}
this->page_shift = ffs(mtd->writesize) - 1;
this->ppb_shift = (this->erase_shift - this->page_shift);
this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
+ /* It's real page size */
+ this->writesize = mtd->writesize;
/* REVIST: Multichip handling */
this->read_bufferram = onenand_sync_read_bufferram;
}
+ /* Allocate buffers, if necessary */
+ if (!this->page_buf) {
+ this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
+ if (!this->page_buf) {
+ printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
+ return -ENOMEM;
+ }
+ this->options |= ONENAND_PAGEBUF_ALLOC;
+ }
+ if (!this->oob_buf) {
+ this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
+ if (!this->oob_buf) {
+ printk(KERN_ERR "onenand_scan: Can't allocate oob_buf\n");
+ if (this->options & ONENAND_PAGEBUF_ALLOC) {
+ this->options &= ~ONENAND_PAGEBUF_ALLOC;
+ kfree(this->page_buf);
+ }
+ return -ENOMEM;
+ }
+ this->options |= ONENAND_OOBBUF_ALLOC;
+ }
+
onenand_unlock(mtd, 0, mtd->size);
return onenand_default_bbt(mtd);
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