Since the musb-gadget code now calls the dma engine properly it is possible to enable it for the TX path in device mode. AM335x Advisory 1.0.13 says that we may lose the toggle bit on multiple RX transfers. There is a workaround in host mode but none in device mode and therefore RX transfers are disabled. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> --- drivers/usb/musb/musb_cppi41.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index a74259e..e64701d 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -362,6 +362,9 @@ static int cppi41_is_compatible(struct dma_channel *channel, u16 maxpacket, WARN_ON(1); return 1; } + if (cppi41_channel->is_tx) + return 1; + /* AM335x Advisory 1.0.13. No workaround for device RX mode */ return 0; } -- 1.8.4.rc1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
