diff options
Diffstat (limited to 'drivers/mtd/onenand')
| -rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 349 |
1 files changed, 233 insertions, 116 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 45bc1433b28..40d8d6ff626 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -763,31 +763,83 @@ static void onenand_release_device(struct mtd_info *mtd) } /** - * 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 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, } /* 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 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, * 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 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, } /** - * 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 @@ static int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, } /** - * 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 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from, 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 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from, * @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 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to * @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) { @@ -1222,27 +1276,72 @@ static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0) /** - * onenand_write - [MTD Interface] write buffer to FLASH + * 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 - [OneNAND Interface] write main and/or 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 ops oob operation description structure * - * Write with ECC + * Write main and/or oob with ECC */ -static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, - size_t *retlen, const u_char *buf) +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; + 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; - 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; + ops->retlen = 0; + ops->oobretlen = 0; /* Do not allow writes past end of device */ if (unlikely((to + len) > mtd->size)) { @@ -1256,6 +1355,13 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, 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 */ @@ -1263,9 +1369,11 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, /* Loop until all data write */ while (written < len) { - int thislen = min_t(int, mtd->writesize - column, len - written); 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); @@ -1279,7 +1387,25 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, } this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize); - this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize); + + 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); @@ -1317,51 +1443,11 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, /* Deselect and wake up anyone waiting on the device */ onenand_release_device(mtd); - *retlen = written; + ops->retlen = written; return ret; } -/** - * 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_do_write_oob - [Internal] OneNAND write out-of-band @@ -1479,6 +1565,33 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, } /** + * 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 @@ 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); } |