usb: dwc3: enable ACCEPT{U1,U2}ENA when SetConfiguration received

As per databook, ACCEPT{U1,U2}ENA bits should be set after receiving
SetConfiguration Command.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 1315e787a316..9b94886b66e5 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -474,6 +474,7 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 {
         u32 cfg;
         int ret;
+        u32 reg;
 
         dwc->start_config_issued = false;
         cfg = le16_to_cpu(ctrl->wValue);
@@ -488,6 +489,14 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
                 /* if the cfg matches and the cfg is non zero */
                 if (cfg && (!ret || (ret == USB_GADGET_DELAYED_STATUS))) {
                         dwc->dev_state = DWC3_CONFIGURED_STATE;
+                        /*
+                         * Enable transition to U1/U2 state when
+                         * nothing is pending from application.
+                         */
+                        reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+                        reg |= (DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA);
+                        dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+
                         dwc->resize_fifos = true;
                         dev_dbg(dwc->dev, "resize fifos flag SET\n");
                 }