usb: renesas_usbhs: add support for USB-DMAC
Some Renesas SoCs have the USB-DMAC. It is able to terminate transfers
when a short packet is received, even if less bytes than the transfer
counter size have been received. Also, it is able to send a short
packet even if the packet size is not multiples of 8bytes.
Since the previous code has used the interruption of USBHS controller
when receiving packets even if this driver has used a dmac, a lot of
interruptions has happened. This patch will reduce such interruptions.
This patch allows to use the USB-DMAC on R-Car H2 and M2.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/renesas_usbhs/pipe.h b/drivers/usb/renesas_usbhs/pipe.h
index d24a059..b0bc7b6 100644
--- a/drivers/usb/renesas_usbhs/pipe.h
+++ b/drivers/usb/renesas_usbhs/pipe.h
@@ -97,6 +97,7 @@
void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo);
void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
u16 epnum, u16 maxp);
+void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable);
#define usbhs_pipe_sequence_data0(pipe) usbhs_pipe_data_sequence(pipe, 0)
#define usbhs_pipe_sequence_data1(pipe) usbhs_pipe_data_sequence(pipe, 1)