From patchwork Fri Apr 7 22:40:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 671410 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E724C76196 for ; Fri, 7 Apr 2023 22:41:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231129AbjDGWlU (ORCPT ); Fri, 7 Apr 2023 18:41:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231251AbjDGWlR (ORCPT ); Fri, 7 Apr 2023 18:41:17 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C0F4D52B; Fri, 7 Apr 2023 15:41:03 -0700 (PDT) Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 337MK2RX002387; Fri, 7 Apr 2023 22:40:57 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=VV1HyI3BY9JBkw/VShtTUOpXS/70QguiTs+CLdeBcVA=; b=IWvfsJnEesxJsc+pnS1ZtVP3hmelobLpespxL6B2bK7p7onyspg1hw2V9nHOIm3qGdha l3Wh7W4vPxNuV7hPtp2IQs6mxhnn5nmFrsfkglhoh/acqfQpAdLhf2d4trUCWUbGc32h n7ad/45aUaLy6TvSVe8xK2aMJ0xoxUwdUiLSvHvJvNXOVUwQ3URvxVF9ZUchhI+w6Se8 R+mTCtyy9TGDIgt1xTAv1lmz/ChIbFirZrKB1DcG1ZXavs91sDZMMMjWvKubBXrZDNHY QFpGUyGCHCkDCtCJgsjtaiPAY+ErcMh30RZdUnYlYaFJ8bP0X+9ewGzs5EWXK+jWMmea BQ== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3ptb2428bd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Apr 2023 22:40:57 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 337Mecl0005239 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 7 Apr 2023 22:40:38 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Fri, 7 Apr 2023 15:40:38 -0700 From: Wesley Cheng To: , CC: , , , , Wesley Cheng Subject: [PATCH v2 1/3] usb: dwc3: gadget: Refactor EP0 forced stall/restart into a separate API Date: Fri, 7 Apr 2023 15:40:23 -0700 Message-ID: <20230407224025.22315-2-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230407224025.22315-1-quic_wcheng@quicinc.com> References: <20230407224025.22315-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 0CeV-N7FHn1ihptVoLDqH4JEHw7lyWl7 X-Proofpoint-GUID: 0CeV-N7FHn1ihptVoLDqH4JEHw7lyWl7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-07_14,2023-04-06_03,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 spamscore=0 adultscore=0 lowpriorityscore=0 clxscore=1015 mlxscore=0 bulkscore=0 mlxlogscore=912 impostorscore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304070205 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Several sequences utilize the same routine for forcing the control endpoint back into the SETUP phase. This is required, because those operations need to ensure that EP0 is back in the default state. Fixes: c96683798e27 ("usb: dwc3: ep0: Don't prepare beyond Setup stage") Signed-off-by: Wesley Cheng --- drivers/usb/dwc3/gadget.c | 44 ++++++++++++++++++--------------------- 1 file changed, 20 insertions(+), 24 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 3c63fa97a680..320e30476c88 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -139,6 +139,24 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) return -ETIMEDOUT; } +static void dwc3_ep0_reset_state(struct dwc3 *dwc) +{ + unsigned int dir; + + if (dwc->ep0state != EP0_SETUP_PHASE) { + dir = !!dwc->ep0_expect_in; + if (dwc->ep0state == EP0_DATA_PHASE) + dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); + else + dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); + + dwc->eps[0]->trb_enqueue = 0; + dwc->eps[1]->trb_enqueue = 0; + + dwc3_ep0_stall_and_restart(dwc); + } +} + /** * dwc3_ep_inc_trb - increment a trb index. * @index: Pointer to the TRB index to increment. @@ -3821,16 +3839,7 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) dwc->setup_packet_pending = false; usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED); - if (dwc->ep0state != EP0_SETUP_PHASE) { - unsigned int dir; - - dir = !!dwc->ep0_expect_in; - if (dwc->ep0state == EP0_DATA_PHASE) - dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); - else - dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); - dwc3_ep0_stall_and_restart(dwc); - } + dwc3_ep0_reset_state(dwc); } static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) @@ -3884,20 +3893,7 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) * phase. So ensure that EP0 is in setup phase by issuing a stall * and restart if EP0 is not in setup phase. */ - if (dwc->ep0state != EP0_SETUP_PHASE) { - unsigned int dir; - - dir = !!dwc->ep0_expect_in; - if (dwc->ep0state == EP0_DATA_PHASE) - dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); - else - dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); - - dwc->eps[0]->trb_enqueue = 0; - dwc->eps[1]->trb_enqueue = 0; - - dwc3_ep0_stall_and_restart(dwc); - } + dwc3_ep0_reset_state(dwc); /* * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a