V4L/DVB (12534): soc-camera: V4L2 API compliant scaling (S_FMT) and cropping (S_CROP)

[mv-sheeva.git] / drivers / spi / omap2_mcspi.c

diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index 2b64091b0f1f31b41206311830df5773df05b32a..9b80ad36dbbad224c28d89475d0f91e8794d826b 100644 (file)
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -272,7 +272,7 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
 
        if (rx != NULL) {
                omap_set_dma_transfer_params(mcspi_dma->dma_rx_channel,
-                               data_type, element_count, 1,
+                               data_type, element_count - 1, 1,
                                OMAP_DMA_SYNC_ELEMENT,
                                mcspi_dma->dma_rx_sync_dev, 1);
 
@@ -303,6 +303,25 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
        if (rx != NULL) {
                wait_for_completion(&mcspi_dma->dma_rx_completion);
                dma_unmap_single(NULL, xfer->rx_dma, count, DMA_FROM_DEVICE);
+               omap2_mcspi_set_enable(spi, 0);
+               if (likely(mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHSTAT0)
+                               & OMAP2_MCSPI_CHSTAT_RXS)) {
+                       u32 w;
+
+                       w = mcspi_read_cs_reg(spi, OMAP2_MCSPI_RX0);
+                       if (word_len <= 8)
+                               ((u8 *)xfer->rx_buf)[element_count - 1] = w;
+                       else if (word_len <= 16)
+                               ((u16 *)xfer->rx_buf)[element_count - 1] = w;
+                       else /* word_len <= 32 */
+                               ((u32 *)xfer->rx_buf)[element_count - 1] = w;
+               } else {
+                       dev_err(&spi->dev, "DMA RX last word empty");
+                       count -= (word_len <= 8)  ? 1 :
+                                (word_len <= 16) ? 2 :
+                              /* word_len <= 32 */ 4;
+               }
+               omap2_mcspi_set_enable(spi, 1);
        }
        return count;
 }