diff options
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 40 |
1 files changed, 12 insertions, 28 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index 52beb5c924b7..ce4692cdb3b2 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -294,16 +294,14 @@ static void u8_cs_chg_writer(struct driver_data *drv_data) { struct chip_data *chip = drv_data->cur_chip; - /* poll for SPI completion before start */ - while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) - cpu_relax(); - while (drv_data->tx < drv_data->tx_end) { cs_active(drv_data, chip); write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); while (read_STAT(drv_data) & BIT_STAT_TXS) cpu_relax(); + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) + cpu_relax(); cs_deactive(drv_data, chip); @@ -342,31 +340,20 @@ static void u8_cs_chg_reader(struct driver_data *drv_data) { struct chip_data *chip = drv_data->cur_chip; - /* poll for SPI completion before start */ - while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) - cpu_relax(); - - /* clear TDBR buffer before read(else it will be shifted out) */ - write_TDBR(drv_data, 0xFFFF); + while (drv_data->rx < drv_data->rx_end) { + cs_active(drv_data, chip); + read_RDBR(drv_data); /* kick off */ - cs_active(drv_data, chip); - dummy_read(drv_data); + while (!(read_STAT(drv_data) & BIT_STAT_RXS)) + cpu_relax(); + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) + cpu_relax(); - while (drv_data->rx < drv_data->rx_end - 1) { + *(u8 *) (drv_data->rx) = read_SHAW(drv_data); cs_deactive(drv_data, chip); - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) - cpu_relax(); - cs_active(drv_data, chip); - *(u8 *) (drv_data->rx) = read_RDBR(drv_data); ++drv_data->rx; } - cs_deactive(drv_data, chip); - - while (!(read_STAT(drv_data) & BIT_STAT_RXS)) - cpu_relax(); - *(u8 *) (drv_data->rx) = read_SHAW(drv_data); - ++drv_data->rx; } static void u8_duplex(struct driver_data *drv_data) @@ -392,15 +379,12 @@ static void u8_cs_chg_duplex(struct driver_data *drv_data) { struct chip_data *chip = drv_data->cur_chip; - /* poll for SPI completion before start */ - while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) - cpu_relax(); - while (drv_data->rx < drv_data->rx_end) { cs_active(drv_data, chip); write_TDBR(drv_data, (*(u8 *) (drv_data->tx))); - while (read_STAT(drv_data) & BIT_STAT_TXS) + + while (!(read_STAT(drv_data) & BIT_STAT_SPIF)) cpu_relax(); while (!(read_STAT(drv_data) & BIT_STAT_RXS)) cpu_relax(); |