diff options
Diffstat (limited to 'drivers/mtd/spi/sf_ops.c')
-rw-r--r-- | drivers/mtd/spi/sf_ops.c | 71 |
1 files changed, 13 insertions, 58 deletions
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index 6e457ecbfc..c820d48b6c 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -139,72 +139,27 @@ static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr) } #endif -static int spi_flash_poll_status(struct spi_slave *spi, unsigned long timeout, - u8 cmd, u8 poll_bit) -{ - unsigned long timebase; - unsigned long flags = SPI_XFER_BEGIN; - int ret; - u8 status; - u8 check_status = 0x0; - - if (cmd == CMD_FLAG_STATUS) - check_status = poll_bit; - -#ifdef CONFIG_SF_DUAL_FLASH - if (spi->flags & SPI_XFER_U_PAGE) - flags |= SPI_XFER_U_PAGE; -#endif - ret = spi_xfer(spi, 8, &cmd, NULL, flags); - if (ret) { - debug("SF: fail to read %s status register\n", - cmd == CMD_READ_STATUS ? "read" : "flag"); - return ret; - } - - timebase = get_timer(0); - do { - WATCHDOG_RESET(); - - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if ((status & poll_bit) == check_status) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & poll_bit) == check_status) - return 0; - - /* Timed out */ - debug("SF: time out!\n"); - return -1; -} - int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) { - struct spi_slave *spi = flash->spi; - int ret; - u8 poll_bit = STATUS_WIP; - u8 cmd = CMD_READ_STATUS; + u8 sr; + int timebase, ret; - ret = spi_flash_poll_status(spi, timeout, cmd, poll_bit); - if (ret < 0) - return ret; + timebase = get_timer(0); - if (flash->poll_cmd == CMD_FLAG_STATUS) { - poll_bit = STATUS_PEC; - cmd = CMD_FLAG_STATUS; - ret = spi_flash_poll_status(spi, timeout, cmd, poll_bit); + while (get_timer(timebase) < timeout) { + ret = spi_flash_cmd_read_status(flash, &sr); if (ret < 0) return ret; + + if (!(sr & STATUS_WIP)) + return 0; + else + break; } - return 0; + printf("SF: Timeout!\n"); + + return -ETIMEDOUT; } int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, |