diff options
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 35 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_bbt.c | 2 | ||||
| -rw-r--r-- | include/linux/mtd/nand.h | 6 |
3 files changed, 26 insertions, 17 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 492ff9d1a35..e1e81a9543e 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -767,8 +767,8 @@ static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, int eccbytes = chip->ecc.bytes; int eccsteps = chip->ecc.steps; uint8_t *p = buf; - uint8_t *ecc_calc = chip->buffers.ecccalc; - uint8_t *ecc_code = chip->buffers.ecccode; + uint8_t *ecc_calc = chip->buffers->ecccalc; + uint8_t *ecc_code = chip->buffers->ecccode; int *eccpos = chip->ecc.layout->eccpos; nand_read_page_raw(mtd, chip, buf); @@ -809,8 +809,8 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, int eccbytes = chip->ecc.bytes; int eccsteps = chip->ecc.steps; uint8_t *p = buf; - uint8_t *ecc_calc = chip->buffers.ecccalc; - uint8_t *ecc_code = chip->buffers.ecccode; + uint8_t *ecc_calc = chip->buffers->ecccalc; + uint8_t *ecc_code = chip->buffers->ecccode; int *eccpos = chip->ecc.layout->eccpos; for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { @@ -971,7 +971,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, page = realpage & chip->pagemask; col = (int)(from & (mtd->writesize - 1)); - chip->oob_poi = chip->buffers.oobrbuf; + chip->oob_poi = chip->buffers->oobrbuf; buf = ops->datbuf; oob = ops->oobbuf; @@ -982,7 +982,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, /* Is the current page in the buffer ? */ if (realpage != chip->pagebuf || oob) { - bufpoi = aligned ? buf : chip->buffers.databuf; + bufpoi = aligned ? buf : chip->buffers->databuf; if (likely(sndcmd)) { chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); @@ -997,7 +997,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, /* Transfer not aligned data */ if (!aligned) { chip->pagebuf = realpage; - memcpy(buf, chip->buffers.databuf + col, bytes); + memcpy(buf, chip->buffers->databuf + col, bytes); } buf += bytes; @@ -1024,7 +1024,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, nand_wait_ready(mtd); } } else { - memcpy(buf, chip->buffers.databuf + col, bytes); + memcpy(buf, chip->buffers->databuf + col, bytes); buf += bytes; } @@ -1267,7 +1267,7 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, realpage = (int)(from >> chip->page_shift); page = realpage & chip->pagemask; - chip->oob_poi = chip->buffers.oobrbuf; + chip->oob_poi = chip->buffers->oobrbuf; while(1) { sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd); @@ -1392,7 +1392,7 @@ static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, int i, eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; int eccsteps = chip->ecc.steps; - uint8_t *ecc_calc = chip->buffers.ecccalc; + uint8_t *ecc_calc = chip->buffers->ecccalc; const uint8_t *p = buf; int *eccpos = chip->ecc.layout->eccpos; @@ -1418,7 +1418,7 @@ static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, int i, eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; int eccsteps = chip->ecc.steps; - uint8_t *ecc_calc = chip->buffers.ecccalc; + uint8_t *ecc_calc = chip->buffers->ecccalc; const uint8_t *p = buf; int *eccpos = chip->ecc.layout->eccpos; @@ -1628,7 +1628,7 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to, (chip->pagebuf << chip->page_shift) < (to + ops->len)) chip->pagebuf = -1; - chip->oob_poi = chip->buffers.oobwbuf; + chip->oob_poi = chip->buffers->oobwbuf; while(1) { int cached = writelen > bytes && page != blockmask; @@ -1746,7 +1746,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, if (page == chip->pagebuf) chip->pagebuf = -1; - chip->oob_poi = chip->buffers.oobwbuf; + chip->oob_poi = chip->buffers->oobwbuf; memset(chip->oob_poi, 0xff, mtd->oobsize); nand_fill_oob(chip, ops->oobbuf, ops); status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask); @@ -2354,8 +2354,13 @@ int nand_scan_tail(struct mtd_info *mtd) int i; struct nand_chip *chip = mtd->priv; + if (!(chip->options & NAND_OWN_BUFFERS)) + chip->buffers = kmalloc(sizeof(*chip->buffers), GFP_KERNEL); + if (!chip->buffers) + return -ENOMEM; + /* Preset the internal oob write buffer */ - memset(chip->buffers.oobwbuf, 0xff, mtd->oobsize); + memset(chip->buffers->oobwbuf, 0xff, mtd->oobsize); /* * If no default placement scheme is given, select an appropriate one @@ -2559,6 +2564,8 @@ void nand_release(struct mtd_info *mtd) /* Free bad block table memory */ kfree(chip->bbt); + if (!(chip->options & NAND_OWN_BUFFERS)) + kfree(chip->buffers); } EXPORT_SYMBOL_GPL(nand_scan); diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c index a612c4ea819..9402653eb09 100644 --- a/drivers/mtd/nand/nand_bbt.c +++ b/drivers/mtd/nand/nand_bbt.c @@ -759,7 +759,7 @@ static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *b struct nand_chip *this = mtd->priv; bd->options &= ~NAND_BBT_SCANEMPTY; - return create_bbt(mtd, this->buffers.databuf, bd, -1); + return create_bbt(mtd, this->buffers->databuf, bd, -1); } /** diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 88d690d79d7..cd4fe9ae862 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -183,7 +183,9 @@ typedef enum { #define NAND_USE_FLASH_BBT 0x00010000 /* This option skips the bbt scan during initialization. */ #define NAND_SKIP_BBTSCAN 0x00020000 - +/* This option is defined if the board driver allocates its own buffers + (e.g. because it needs them DMA-coherent */ +#define NAND_OWN_BUFFERS 0x00040000 /* Options set by nand scan */ /* Nand scan has allocated controller struct */ #define NAND_CONTROLLER_ALLOC 0x80000000 @@ -385,7 +387,7 @@ struct nand_chip { struct nand_ecclayout *ecclayout; struct nand_ecc_ctrl ecc; - struct nand_buffers buffers; + struct nand_buffers *buffers; struct nand_hw_control hwcontrol; struct mtd_oob_ops ops; |