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| author | Jeroen Hofstee <jeroen@myspectrum.nl> | 2015-05-30 10:11:24 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-06-18 11:23:45 -0400 |
| commit | cb2fc338f8a877564cfc22a72714fade01f83c1d (patch) | |
| tree | 475cabafe7856a5fe6802f7ff6990df8760b7861 | |
| parent | c07361145ff9a28e129a5ef49213cf2beba911e5 (diff) | |
| download | u-boot-imx-cb2fc338f8a877564cfc22a72714fade01f83c1d.zip u-boot-imx-cb2fc338f8a877564cfc22a72714fade01f83c1d.tar.gz u-boot-imx-cb2fc338f8a877564cfc22a72714fade01f83c1d.tar.bz2 | |
mtd: OMAP: Enable GPMC prefetch mode for 16 bit access
commit c316f57 "mtd: OMAP: Enable GPMC prefetch mode" only enabled
prefetch mode for 8 bit nand access, this adds 16 bit as well.
Cc: Scott Wood <scottwood@freescale.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Daniel Mack <zonque@gmail.com>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Reviewed-by: Tom Rini <trini@konsulko.com>
| -rw-r--r-- | drivers/mtd/nand/omap_gpmc.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c index de90d55..4372988 100644 --- a/drivers/mtd/nand/omap_gpmc.c +++ b/drivers/mtd/nand/omap_gpmc.c @@ -415,7 +415,17 @@ static int __read_prefetch_aligned(struct nand_chip *chip, uint32_t *buf, int le return 0; } -static void omap_nand_read_prefetch8(struct mtd_info *mtd, uint8_t *buf, int len) +static inline void omap_nand_read(struct mtd_info *mtd, uint8_t *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + + if (chip->options & NAND_BUSWIDTH_16) + nand_read_buf16(mtd, buf, len); + else + nand_read_buf(mtd, buf, len); +} + +static void omap_nand_read_prefetch(struct mtd_info *mtd, uint8_t *buf, int len) { int ret; uint32_t head, tail; @@ -427,7 +437,7 @@ static void omap_nand_read_prefetch8(struct mtd_info *mtd, uint8_t *buf, int len */ head = ((uint32_t) buf) % 4; if (head) { - nand_read_buf(mtd, buf, head); + omap_nand_read(mtd, buf, head); buf += head; len -= head; } @@ -438,13 +448,13 @@ static void omap_nand_read_prefetch8(struct mtd_info *mtd, uint8_t *buf, int len */ tail = len % 4; - ret = __read_prefetch_aligned(chip, (uint32_t *) buf, len - tail); + ret = __read_prefetch_aligned(chip, (uint32_t *)buf, len - tail); if (ret < 0) { /* fallback in case the prefetch engine is busy */ - nand_read_buf(mtd, buf, len); + omap_nand_read(mtd, buf, len); } else if (tail) { buf += len - tail; - nand_read_buf(mtd, buf, tail); + omap_nand_read(mtd, buf, tail); } } #endif /* CONFIG_NAND_OMAP_GPMC_PREFETCH */ @@ -1011,13 +1021,11 @@ int board_nand_init(struct nand_chip *nand) if (err) return err; - /* TODO: Implement for 16-bit bus width */ - if (nand->options & NAND_BUSWIDTH_16) - nand->read_buf = nand_read_buf16; #ifdef CONFIG_NAND_OMAP_GPMC_PREFETCH - else - nand->read_buf = omap_nand_read_prefetch8; + nand->read_buf = omap_nand_read_prefetch; #else + if (nand->options & NAND_BUSWIDTH_16) + nand->read_buf = nand_read_buf16; else nand->read_buf = nand_read_buf; #endif |