usb: dwc3: workaround: missing USB3 Reset event
DWC3 revisions <1.90a have an issue which would cause
a missing USB3 Reset event. In such cases, it's
suggested that we follow the steps of a normal
USB3 Reset on Connection Done Event.
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0a6deea..6704a52 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1756,6 +1756,22 @@
switch (speed) {
case DWC3_DCFG_SUPERSPEED:
+ /*
+ * WORKAROUND: DWC3 revisions <1.90a have an issue which
+ * would cause a missing USB3 Reset event.
+ *
+ * In such situations, we should force a USB3 Reset
+ * event by calling our dwc3_gadget_reset_interrupt()
+ * routine.
+ *
+ * Refers to:
+ *
+ * STAR#9000483510: RTL: SS : USB3 reset event may
+ * not be generated always when the link enters poll
+ */
+ if (dwc->revision < DWC3_REVISION_190A)
+ dwc3_gadget_reset_interrupt(dwc);
+
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dwc->gadget.ep0->maxpacket = 512;
dwc->gadget.speed = USB_SPEED_SUPER;