From 72704f876f50b00f08d41d4b13d5a5d11262254f Mon Sep 17 00:00:00 2001 From: Baolin Wang Date: Mon, 16 May 2016 16:43:53 +0800 Subject: [PATCH] dwc3: gadget: Implement the suspend entry event handler It had changed to be suspend event for BIT6 in DEVT register from version 2.30a and above. Thus this patch introduces one suspend event handler to handle the suspend event. Signed-off-by: Baolin Wang Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index f20975300594..8f8c2157910e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2695,6 +2695,17 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, dwc->link_state = next; } +static void dwc3_gadget_suspend_interrupt(struct dwc3 *dwc, + unsigned int evtinfo) +{ + enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK; + + if (dwc->link_state != next && next == DWC3_LINK_STATE_U3) + dwc3_suspend_gadget(dwc); + + dwc->link_state = next; +} + static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, unsigned int evtinfo) { @@ -2746,7 +2757,20 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc, dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); break; case DWC3_DEVICE_EVENT_EOPF: - dwc3_trace(trace_dwc3_gadget, "End of Periodic Frame"); + /* It changed to be suspend event for version 2.30a and above */ + if (dwc->revision < DWC3_REVISION_230A) { + dwc3_trace(trace_dwc3_gadget, "End of Periodic Frame"); + } else { + dwc3_trace(trace_dwc3_gadget, "U3/L1-L2 Suspend Event"); + + /* + * Ignore suspend event until the gadget enters into + * USB_STATE_CONFIGURED state. + */ + if (dwc->gadget.state >= USB_STATE_CONFIGURED) + dwc3_gadget_suspend_interrupt(dwc, + event->event_info); + } break; case DWC3_DEVICE_EVENT_SOF: dwc3_trace(trace_dwc3_gadget, "Start of Periodic Frame"); -- 2.45.2