From: Per Forlin per.forlin@linaro.org
The dma driver requires both src and dst to be set. This fix is needed in order to run gadget mass storage. Patch is verified on snowball.
Signed-off-by: Per Forlin per.forlin@linaro.org --- drivers/usb/musb/ux500_dma.c | 16 +++++++--------- 1 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c index cecace4..2313475 100644 --- a/drivers/usb/musb/ux500_dma.c +++ b/drivers/usb/musb/ux500_dma.c @@ -133,15 +133,13 @@ static bool ux500_configure_channel(struct dma_channel *channel, DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_conf.direction = direction; - if (direction == DMA_FROM_DEVICE) { - slave_conf.src_addr = usb_fifo_addr; - slave_conf.src_addr_width = addr_width; - slave_conf.src_maxburst = 16; - } else { - slave_conf.dst_addr = usb_fifo_addr; - slave_conf.dst_addr_width = addr_width; - slave_conf.dst_maxburst = 16; - } + slave_conf.src_addr = usb_fifo_addr; + slave_conf.src_addr_width = addr_width; + slave_conf.src_maxburst = 16; + slave_conf.dst_addr = usb_fifo_addr; + slave_conf.dst_addr_width = addr_width; + slave_conf.dst_maxburst = 16; + dma_chan->device->device_control(dma_chan, DMA_SLAVE_CONFIG, (unsigned long) &slave_conf);