diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2015-10-05 11:34:16 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2015-10-05 11:34:16 +0000 |
| commit | 38389c79c2ee89a662807e7dc4e82a5d11786ff8 (patch) | |
| tree | 7dcfa5298fe54b6d51869b6093df71cc993ae04d | |
| parent | 8181976067d879d902f192693c6b0d06bee181b9 (diff) | |
| download | mtk-20170518-38389c79c2ee89a662807e7dc4e82a5d11786ff8.zip mtk-20170518-38389c79c2ee89a662807e7dc4e82a5d11786ff8.tar.gz mtk-20170518-38389c79c2ee89a662807e7dc4e82a5d11786ff8.tar.bz2 | |
ramips: improve read performance of the m25p80 chunked io patch
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 47137
| -rw-r--r-- | target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch | 65 |
1 files changed, 58 insertions, 7 deletions
diff --git a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch index 1716e1c..2e81e45 100644 --- a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch +++ b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch @@ -16,10 +16,56 @@ u8 command[MAX_CMD_SIZE]; }; -@@ -157,6 +159,61 @@ static int m25p80_read(struct spi_nor *n - return 0; +@@ -117,25 +119,14 @@ static inline unsigned int m25p80_rx_nbi + } } +-/* +- * Read an address range from the nor chip. The address range +- * may be any size provided it is within the physical boundaries. +- */ +-static int m25p80_read(struct spi_nor *nor, loff_t from, size_t len, +- size_t *retlen, u_char *buf) ++static int __m25p80_read(struct spi_nor *nor, loff_t from, size_t len, ++ size_t *retlen, u_char *buf) + { + struct m25p *flash = nor->priv; + struct spi_device *spi = flash->spi; + struct spi_transfer t[2]; + struct spi_message m; + int dummy = nor->read_dummy; +- int ret; +- +- /* Wait till previous write/erase is done. */ +- ret = nor->wait_till_ready(nor); +- if (ret) +- return ret; +- + spi_message_init(&m); + memset(t, 0, (sizeof t)); + +@@ -156,6 +147,84 @@ static int m25p80_read(struct spi_nor *n + *retlen = m.actual_length - m25p_cmdsz(nor) - dummy; + return 0; + } ++/* ++ * Read an address range from the nor chip. The address range ++ * may be any size provided it is within the physical boundaries. ++ */ ++static int m25p80_read(struct spi_nor *nor, loff_t from, size_t len, ++ size_t *retlen, u_char *buf) ++{ ++ int ret; ++ ++ /* Wait till previous write/erase is done. */ ++ ret = nor->wait_till_ready(nor); ++ if (ret) ++ return ret; ++ ++ return __m25p80_read(nor, from, len, retlen, buf); ++} ++ ++ +static void m25p80_chunked_write(struct spi_nor *nor, loff_t _from, size_t _len, + size_t *_retlen, const u_char *_buf) +{ @@ -52,6 +98,12 @@ +{ + struct m25p *flash = nor->priv; + int chunk_size; ++ int ret; ++ ++ /* Wait till previous write/erase is done. */ ++ ret = nor->wait_till_ready(nor); ++ if (ret) ++ return ret; + + chunk_size = flash->chunk_size; + if (!chunk_size) @@ -64,7 +116,7 @@ + u_char *buf = _buf + *_retlen; + loff_t from = _from + *_retlen; + int retlen = 0; -+ int ret = m25p80_read(nor, from, len, &retlen, buf); ++ int ret = __m25p80_read(nor, from, len, &retlen, buf); + + if (ret) + return ret; @@ -74,11 +126,10 @@ + + return 0; +} -+ + static int m25p80_erase(struct spi_nor *nor, loff_t offset) { - struct m25p *flash = nor->priv; -@@ -197,6 +254,7 @@ static int m25p_probe(struct spi_device +@@ -197,6 +266,7 @@ static int m25p_probe(struct spi_device struct spi_nor *nor; enum read_mode mode = SPI_NOR_NORMAL; char *flash_name = NULL; @@ -86,7 +137,7 @@ int ret; data = dev_get_platdata(&spi->dev); -@@ -244,6 +302,14 @@ static int m25p_probe(struct spi_device +@@ -244,6 +314,14 @@ static int m25p_probe(struct spi_device if (ret) return ret; |