From patchwork Fri Mar 10 16:34:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 662076 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 04303C7618D for ; Fri, 10 Mar 2023 16:37:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230386AbjCJQhs (ORCPT ); Fri, 10 Mar 2023 11:37:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231459AbjCJQhR (ORCPT ); Fri, 10 Mar 2023 11:37:17 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AD494B826; Fri, 10 Mar 2023 08:35:18 -0800 (PST) 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 32AFl3vZ027552; Fri, 10 Mar 2023 16:34:56 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-transfer-encoding : content-type; s=qcppdkim1; bh=9C4DYWplhgjPBnAXY668/L2h51S0yRoFzMkgqWjFhQQ=; b=DdHSb6ECMWDqCwuWQVnXfRpVapipHjn2nXvLcoBS5QskgA3ZrI3Jhg5gGW2P9ibYk1dA lu+dtAjIw6TVP9t3P0iM8jl5h5S3L8oWbocqw8vo0PHh3hT0Ua2IO4L1htrHq72Q9+CH DE8arcjH053AI1WqKby72kXNUkbAVeRZLqYYGCfw3XlZuHhSs+VgwaNzFsl8H5+zgP3h AY8Xrc1nKd9Xeklz5KXehASHQ7xd+cZ0ovgYO/4U0/DnheLruM01ZW95k8sOrtG7WJcn aJjr2SfriuGOHmL0EPJsbjVo66rnplce0W0lecEtZvT3y/vUYcJ3U5MSqvC45CFALHO/ Gw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3p7rqgt5r1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Mar 2023 16:34:56 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 32AGYtnB032555 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 10 Mar 2023 16:34:55 GMT Received: from hu-kriskura-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Fri, 10 Mar 2023 08:34:49 -0800 From: Krishna Kurapati To: Thinh Nguyen , Greg Kroah-Hartman , Philipp Zabel , "Andy Gross" , Bjorn Andersson , "Konrad Dybcio" , Rob Herring , Krzysztof Kozlowski , Felipe Balbi CC: , , , , , , , , , , , Krishna Kurapati Subject: [PATCH 3/8] usb: dwc3: core: Skip setting event buffers for host only controllers Date: Fri, 10 Mar 2023 22:04:15 +0530 Message-ID: <20230310163420.7582-4-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230310163420.7582-1-quic_kriskura@quicinc.com> References: <20230310163420.7582-1-quic_kriskura@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: nG66TYP_EWdY1M39YHfzlw7-LTM9SCcw X-Proofpoint-GUID: nG66TYP_EWdY1M39YHfzlw7-LTM9SCcw 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=2023-03-10_07,2023-03-10_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 adultscore=0 mlxlogscore=831 spamscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 suspectscore=0 mlxscore=0 lowpriorityscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2303100130 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On some SoC's like SA8295P where the teritiary controller is host-only capable, GEVTADDRHI/LO, GEVTSIZ, GEVTCOUNT registers are not accessible. Trying to setup them up during core_init leads to a crash. For DRD/Peripheral supported controllers, event buffer setup is done again in gadget_pullup. Skip setup or cleanup of event buffers if controller is host-only capable. Signed-off-by: Krishna Kurapati --- drivers/usb/dwc3/core.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 076c0f8a4441..1ca9fa40a66e 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -840,7 +840,11 @@ static void dwc3_clk_disable(struct dwc3 *dwc) static void dwc3_core_exit(struct dwc3 *dwc) { - dwc3_event_buffers_cleanup(dwc); + unsigned int hw_mode; + + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1); @@ -1177,10 +1181,12 @@ static int dwc3_core_init(struct dwc3 *dwc) if (ret < 0) goto err3; - ret = dwc3_event_buffers_setup(dwc); - if (ret) { - dev_err(dwc->dev, "failed to setup event buffers\n"); - goto err4; + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) { + ret = dwc3_event_buffers_setup(dwc); + if (ret) { + dev_err(dwc->dev, "failed to setup event buffers\n"); + goto err4; + } } /* @@ -2008,7 +2014,9 @@ static int dwc3_probe(struct platform_device *pdev) err5: dwc3_debugfs_exit(dwc); - dwc3_event_buffers_cleanup(dwc); + + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1);