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| author | Mike Frysinger <vapier@gentoo.org> | 2011-01-10 02:20:12 -0500 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-04-11 21:00:53 +0200 |
| commit | 6163045bcd276818d9ad6bdd1bf36ddcd60d014b (patch) | |
| tree | 732ba3dd3b07977e38c773960dfb76c78ee4ab09 /drivers/mtd/spi/sst.c | |
| parent | 000044d8bfdc803a1a97e68ba95f289bfe5ad149 (diff) | |
| download | u-boot-imx-6163045bcd276818d9ad6bdd1bf36ddcd60d014b.zip u-boot-imx-6163045bcd276818d9ad6bdd1bf36ddcd60d014b.tar.gz u-boot-imx-6163045bcd276818d9ad6bdd1bf36ddcd60d014b.tar.bz2 | |
sf: unify status polling for ready bit
All of the spi flash drivers implement the status register polling for
detecting the device ready state, so unify them all in a new helper
function -- spi_flash_wait_ready.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/mtd/spi/sst.c')
| -rw-r--r-- | drivers/mtd/spi/sst.c | 41 |
1 files changed, 3 insertions, 38 deletions
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c index 2557891..4a82f8a 100644 --- a/drivers/mtd/spi/sst.c +++ b/drivers/mtd/spi/sst.c @@ -90,41 +90,6 @@ static const struct sst_spi_flash_params sst_spi_flash_table[] = { }; static int -sst_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 byte = CMD_SST_RDSR; - - ret = spi_xfer(spi, sizeof(byte) * 8, &byte, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", byte, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, sizeof(byte) * 8, NULL, &byte, 0); - if (ret) - break; - - if ((byte & SST_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if (!ret && (byte & SST_SR_WIP) != 0) - ret = -1; - - if (ret) - debug("SF: sst wait for ready timed out\n"); - return ret; -} - -static int sst_enable_writing(struct spi_flash *flash) { int ret = spi_flash_cmd(flash->spi, CMD_SST_WREN, NULL, 0); @@ -177,7 +142,7 @@ sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf) if (ret) return ret; - return sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + return spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); } static int @@ -224,7 +189,7 @@ sst_write(struct spi_flash *flash, u32 offset, size_t len, const void *buf) break; } - ret = sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); if (ret) break; @@ -298,7 +263,7 @@ sst_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - ret = sst_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); if (ret) break; } |