From patchwork Wed Apr 5 12:57:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 13201720 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 C5D98C77B60 for ; Wed, 5 Apr 2023 12:59:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238108AbjDEM7N (ORCPT ); Wed, 5 Apr 2023 08:59:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238110AbjDEM7K (ORCPT ); Wed, 5 Apr 2023 08:59:10 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8F2A45FFC; Wed, 5 Apr 2023 05:58:53 -0700 (PDT) Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3359c5ff017586; Wed, 5 Apr 2023 12:58:45 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=lY5SWbXTZbHga92Nc/RFPY6MGhTnq0qvDaUfk3nkSg8=; b=OWxHuX9a9hVbwI/NbwL8uVFeEFdW4wWhhPu3X5VkSWfXBUJPPJTkqADTdWG1Zo662D77 esXzl5t9b11g5x9e9s1RB/xuCi/ZAMuwXSWD6GVd9WEkruG6NAtq6NfdWDXNPIh6kMZq IHt9Lgl46wQVckwyG9ILhLtiiR10S+qIb5hsJGrvRdbcDHUl5Xp8IDeFs1AdmB6KRFLn uLGijfUXVw/ai0zrRKTKyE08v0e5p06PQYmmtjenonsRxzZQl8S5BtCw3Vi4Yq3s//y9 dtwDy2qAC0CXsjXFRX+2kC9Ze883g2Y/HTMil2gn3ez5xNAVoDinLlmbKU+1dsdyAEEa +g== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3prwc79gn4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Apr 2023 12:58:45 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 335CwiD3016466 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 5 Apr 2023 12:58:44 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 15.2.986.42; Wed, 5 Apr 2023 05:58:38 -0700 From: Krishna Kurapati To: Thinh Nguyen , Greg Kroah-Hartman , Philipp Zabel , "Andy Gross" , Bjorn Andersson , "Konrad Dybcio" , Rob Herring , Krzysztof Kozlowski CC: , , , , , , , , , , , Krishna Kurapati Subject: [PATCH v6 3/8] usb: dwc3: core: Skip setting event buffers for host only controllers Date: Wed, 5 Apr 2023 18:27:54 +0530 Message-ID: <20230405125759.4201-4-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230405125759.4201-1-quic_kriskura@quicinc.com> References: <20230405125759.4201-1-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-GUID: D6DHpjeo6yqjmQj-d8XdPi6J6ma1WXjF X-Proofpoint-ORIG-GUID: D6DHpjeo6yqjmQj-d8XdPi6J6ma1WXjF 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=2023-04-05_08,2023-04-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 malwarescore=0 phishscore=0 priorityscore=1501 bulkscore=0 mlxlogscore=879 adultscore=0 lowpriorityscore=0 mlxscore=0 spamscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304050117 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On some SoC's like SA8295P where the tertiary 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 --- Link to v5: https://lore.kernel.org/all/20230310163420.7582-4-quic_kriskura@quicinc.com/ 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 567ae79389a1..2964bcaa0a27 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -839,7 +839,11 @@ 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); @@ -1176,10 +1180,12 @@ 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; + } } /* @@ -2002,7 +2008,9 @@ 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);