staging: octeon-usb: program DMA engine based on transfer direction
Program DMA engine based on transfer direction. We are only transferring
to one direction at a time.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
index 1ec70eb..a8c467f 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -1636,8 +1636,9 @@
usbc_haintmsk.u32);
}
- /* Setup the locations the DMA engines use */
+ /* Setup the location the DMA engine uses. */
{
+ uint64_t reg;
uint64_t dma_address = transaction->buffer +
transaction->actual_bytes;
@@ -1646,12 +1647,11 @@
transaction->iso_packets[0].offset +
transaction->actual_bytes;
- cvmx_write64_uint64(CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) +
- channel * 8,
- dma_address);
- cvmx_write64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index) +
- channel * 8,
- dma_address);
+ if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)
+ reg = CVMX_USBNX_DMA0_OUTB_CHN0(usb->index);
+ else
+ reg = CVMX_USBNX_DMA0_INB_CHN0(usb->index);
+ cvmx_write64_uint64(reg + channel * 8, dma_address);
}
/* Setup both the size of the transfer and the SPLIT characteristics */