From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753430AbcEPIoM (ORCPT ); Mon, 16 May 2016 04:44:12 -0400 Received: from mail-pf0-f181.google.com ([209.85.192.181]:33247 "EHLO mail-pf0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752059AbcEPIoK (ORCPT ); Mon, 16 May 2016 04:44:10 -0400 From: Baolin Wang To: balbi@kernel.org, gregkh@linuxfoundation.org Cc: broonie@kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, baolin.wang@linaro.org Subject: [PATCH] dwc3: gadget: Implement the suspend entry event handler Date: Mon, 16 May 2016 16:43:53 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 8e4a1b1..9b14ecc 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2595,6 +2595,17 @@ 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) { @@ -2646,7 +2657,20 @@ 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"); -- 1.7.9.5