From ebe6b2b81464a2c083542feb1a1a6c78a2268151 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 18 Jul 2017 21:26:41 +0900 Subject: [PATCH] usb: gadget: udc: renesas_usb3: fix zlp transfer by the dmac The dedicated dmac can transfer a zero-length-packet (zlp) if some bits of the USB_COM_CON register. However, the commit 2d4aa21a73ba ("usb: gadget: udc: renesas_usb3: add support for dedicated DMAC") didn't set the bits to 1. So, this patch fixes it. Fixes: 2d4aa21a73b ("usb: gadget: udc: renesas_usb3: add support for dedicated DMAC) Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 923ad5a..1cc5f0d 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -89,6 +89,9 @@ /* USB_COM_CON */ #define USB_COM_CON_CONF BIT(24) +#define USB_COM_CON_PN_WDATAIF_NL BIT(23) +#define USB_COM_CON_PN_RDATAIF_NL BIT(22) +#define USB_COM_CON_PN_LSTTR_PP BIT(21) #define USB_COM_CON_SPD_MODE BIT(17) #define USB_COM_CON_EP0_EN BIT(16) #define USB_COM_CON_DEV_ADDR_SHIFT 8 @@ -686,6 +689,9 @@ static void renesas_usb3_init_controller(struct renesas_usb3 *usb3) { usb3_init_axi_bridge(usb3); usb3_init_epc_registers(usb3); + usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL | + USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP, + USB3_USB_COM_CON); usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA); usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA); -- 2.7.4