diff options
| author | Mike Frysinger | 2011-01-10 02:20:12 -0500 |
|---|---|---|
| committer | Wolfgang Denk | 2011-04-11 21:00:53 +0200 |
| commit | 6163045bcd276818d9ad6bdd1bf36ddcd60d014b (patch) | |
| tree | 732ba3dd3b07977e38c773960dfb76c78ee4ab09 /drivers/mtd/spi/stmicro.c | |
| parent | 000044d8bfdc803a1a97e68ba95f289bfe5ad149 (diff) | |
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/stmicro.c')
| -rw-r--r-- | drivers/mtd/spi/stmicro.c | 48 |
1 files changed, 4 insertions, 44 deletions
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c index 31340279cb8..02da8b2fdc5 100644 --- a/drivers/mtd/spi/stmicro.c +++ b/drivers/mtd/spi/stmicro.c @@ -55,8 +55,6 @@ #define STM_ID_M25P80 0x14 #define STM_ID_M25P128 0x18 -#define STMICRO_SR_WIP (1 << 0) /* Write-in-Progress */ - struct stmicro_spi_flash_params { u8 idcode1; u16 page_size; @@ -136,40 +134,6 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = { }, }; -static int stmicro_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 cmd = CMD_M25PXX_RDSR; - u8 status; - - ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", cmd, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if ((status & STMICRO_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & STMICRO_SR_WIP) == 0) - return 0; - - /* Timed out */ - return -1; -} - static int stmicro_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf) { @@ -238,11 +202,9 @@ static int stmicro_write(struct spi_flash *flash, break; } - ret = stmicro_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); - if (ret < 0) { - debug("SF: STMicro page programming timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) break; - } page_addr++; byte_addr = 0; @@ -304,11 +266,9 @@ int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); - if (ret < 0) { - debug("SF: STMicro page erase timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) break; - } } debug("SF: STMicro: Successfully erased %u bytes @ 0x%x\n", |