From patchwork Mon May 1 14:34:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 678332 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 425E7C77B7F for ; Mon, 1 May 2023 14:35:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232511AbjEAOfr (ORCPT ); Mon, 1 May 2023 10:35:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229556AbjEAOfo (ORCPT ); Mon, 1 May 2023 10:35:44 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E4651707; Mon, 1 May 2023 07:35:43 -0700 (PDT) Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 341EHJm4028582; Mon, 1 May 2023 14:35:28 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=SHJpOQOaDQimrpDNKLc96uJyDLYS5uU5n2YMSTNQvrg=; b=p6QWS1JL7Y74r1KoC7ZFCxmZ/O/0bPiz/vI6TdkvGGV3zggIrwg9HvMQBZ+cNTswBpvf ov/DPIhsk46oUnbIum8YiTcFii0gbxBahcGEL2wWjZKRzDiTiswZzjI/qDBHTi2U93VU XbFF4E0WHGOyXsnWAJ2qBD7CeYBcDjI7T+CKSkOPhmo2CT3eQD1UwUn/LdAJyYYsNEi9 vJaGg8IVoZ/cyLw1wiH870LIW9pj0fI+BhrJONb2CEPsbD8ColQMlgf9wyNqG74NlNcM 97pWIv0XkVa1ehrogtKOQMemxhT7GxP9LmXtYOnFEow0nHHjVxEwrKV4GpqsMigH3Eyv ew== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3q8v0rukw9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 01 May 2023 14:35:27 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 341EZQJA015913 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 1 May 2023 14:35:26 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; Mon, 1 May 2023 07:35:20 -0700 From: Krishna Kurapati To: Thinh Nguyen , Greg Kroah-Hartman , Philipp Zabel , "Andy Gross" , Bjorn Andersson , "Konrad Dybcio" , Rob Herring , Krzysztof Kozlowski , Felipe Balbi , Wesley Cheng CC: , , , , , , , , , , Krishna Kurapati Subject: [PATCH v7 4/9] usb: dwc3: core: Skip setting event buffers for host only controllers Date: Mon, 1 May 2023 20:04:40 +0530 Message-ID: <20230501143445.3851-5-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230501143445.3851-1-quic_kriskura@quicinc.com> References: <20230501143445.3851-1-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: -_WjZryAEt_KX7j76HGaEwC_HHoYfZDJ X-Proofpoint-ORIG-GUID: -_WjZryAEt_KX7j76HGaEwC_HHoYfZDJ 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=2023-05-01_08,2023-04-27_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=957 suspectscore=0 adultscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 mlxscore=0 spamscore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2305010117 Precedence: bulk List-ID: X-Mailing-List: linux-usb@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 --- drivers/usb/dwc3/core.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index b8ac7bcee391..8625fc5c7ab4 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -835,7 +835,12 @@ 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); + dwc3_phy_power_off(dwc); dwc3_phy_exit(dwc); dwc3_clk_disable(dwc); @@ -1141,10 +1146,12 @@ static int dwc3_core_init(struct dwc3 *dwc) if (ret) goto err_exit_phy; - ret = dwc3_event_buffers_setup(dwc); - if (ret) { - dev_err(dwc->dev, "failed to setup event buffers\n"); - goto err_power_off_phy; + 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 err_power_off_phy; + } } /* @@ -1958,7 +1965,10 @@ static int dwc3_probe(struct platform_device *pdev) err_exit_debugfs: dwc3_debugfs_exit(dwc); - dwc3_event_buffers_cleanup(dwc); + + if (hw_mode != DWC3_GHWPARAMS0_MODE_HOST) + dwc3_event_buffers_cleanup(dwc); + dwc3_phy_power_off(dwc); dwc3_phy_exit(dwc); dwc3_ulpi_exit(dwc);