From patchwork Wed Jul 12 08:22:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souradeep Chowdhury X-Patchwork-Id: 13309792 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 40DDCC001DD for ; Wed, 12 Jul 2023 08:28:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232341AbjGLI22 (ORCPT ); Wed, 12 Jul 2023 04:28:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232819AbjGLI2E (ORCPT ); Wed, 12 Jul 2023 04:28:04 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EB6C22D6A; Wed, 12 Jul 2023 01:23:10 -0700 (PDT) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36C6ScJ7013338; Wed, 12 Jul 2023 08:23:04 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=hVzf/h1iQ+R3J36zD1MxGrCE/cAMVqwUd+PVOholWlg=; b=p04CaScvNvCruN5VQ4vqQxEKZlJNNUsceYXz+uq6aQKQDbK+aoqFVF7kV9+sAjeQ0C2g K4FYfliJLHC8A7uJOh2u+kJjf0KwFi+P1Vp+6V/2LibOcxwohwDjXDhGJNiPCeL87y5g NwkRq5nKKl+oxhY0ZgO4c0RPpoGq0Y7hcOUEXxu6KnTAtFTN9pSkOLifv78JRwhNqWNc DB3ZXHg4tbTZxBTaaSKziH+BHRYKsD7+Us/wp33l6z1r/UyB8OP2+ubeqbEBW0H5WtWe FvhwecTVEnKuO/5Yt16SpD3Tildd7T4AMvrCqZch9wVsINWc+YJjM1LDAkoDmmYOOZwO 1Q== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3rsfeq0x7r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Jul 2023 08:23:04 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 36C8N3lX014311 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Jul 2023 08:23:03 GMT Received: from hu-schowdhu-blr.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 15.2.1118.30; Wed, 12 Jul 2023 01:22:59 -0700 From: Souradeep Chowdhury To: , , Andy Gross , Konrad Dybcio , "Bjorn Andersson" , CC: , , Sibi Sankar , Rajendra Nayak , Souradeep Chowdhury Subject: [PATCH V1 1/3] usb: misc: Add the interface for notifier call for Embedded USB Debugger(EUD) Date: Wed, 12 Jul 2023 13:52:38 +0530 Message-ID: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: 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: HmumV-VRMaraD9yASJM1jw0BP7fj7PtJ X-Proofpoint-GUID: HmumV-VRMaraD9yASJM1jw0BP7fj7PtJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-12_05,2023-07-11_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 priorityscore=1501 mlxlogscore=599 suspectscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307120073 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add the interface for notifier calls that can be made to check the role switch status of EUD. An external module can import this file and use the wrapper functions eud_register_notify to register a notifier to the EUD notifier chain, eud_unregister_notify to unregister the notifier from the chain, eud_notifier_call_chain to call the notifier chain to check the status of role-switch. These interfaces are provided to handle the case where multiple modules might go for a role-switch on the same port in which case EUD will be given priority over the rest. Signed-off-by: Souradeep Chowdhury --- drivers/usb/misc/qcom_eud_notifier.h | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 drivers/usb/misc/qcom_eud_notifier.h diff --git a/drivers/usb/misc/qcom_eud_notifier.h b/drivers/usb/misc/qcom_eud_notifier.h new file mode 100644 index 000000000000..0cae42a5f6bf --- /dev/null +++ b/drivers/usb/misc/qcom_eud_notifier.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Released under the GPLv2 only. + */ + +#include + +extern int eud_register_notify(struct notifier_block *nb); +extern void eud_unregister_notify(struct notifier_block *nb); +extern void eud_notifier_call_chain(unsigned long role_switch_state); From patchwork Wed Jul 12 08:22:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souradeep Chowdhury X-Patchwork-Id: 13309793 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 A1644EB64D9 for ; Wed, 12 Jul 2023 08:28:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232450AbjGLI2b (ORCPT ); Wed, 12 Jul 2023 04:28:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232876AbjGLI2H (ORCPT ); Wed, 12 Jul 2023 04:28:07 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 028101993; Wed, 12 Jul 2023 01:23:15 -0700 (PDT) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36C3mOZR032181; Wed, 12 Jul 2023 08:23:08 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=40o+X8oKsX81WIYXOnfFG7rcPkNuQsSlDf08s1f+OFU=; b=lbf3kT8WLHSNf58d+2fYPsgT/rfIM4BtAjGJ57ivrWQTbA9emg/XLa4X1BnEpQEge76+ YaaXlhf8J/eXsLXPJIlek2vuJRlUoyuHC0HnOu1twbU1yjzNuIKkEvNaj3BYFyBK6mLc 2Y2nXnTDCcIMnrfc+eCR/eQmd7uCu++vvOCiMDae4DdQFGXslUReGzo+NCt7IIZtZliX OuwuBK8gnpuZIM3YsPEg5eE3lcXyWm73RbNgTM99gUHUv/lIW9X7AJsuUT/5PNcTRpb2 /RCIxN7/1JzdJLwiWKxqvEIdOeTb4VoZsnJcDcuouaJc6STs9fVTOZi4xGD7+MWO+N9N Rw== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3rsgd38tv4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Jul 2023 08:23:08 +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 36C8N7mo031890 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Jul 2023 08:23:07 GMT Received: from hu-schowdhu-blr.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 15.2.1118.30; Wed, 12 Jul 2023 01:23:03 -0700 From: Souradeep Chowdhury To: , , Andy Gross , Konrad Dybcio , "Bjorn Andersson" , CC: , , Sibi Sankar , Rajendra Nayak , Souradeep Chowdhury Subject: [PATCH V1 2/3] usb: misc: Add notifier call chain to Embedded USB Debug(EUD) driver Date: Wed, 12 Jul 2023 13:52:39 +0530 Message-ID: <18212c7abbb8c833cc07f8500d4905b79c49ec59.1689148711.git.quic_schowdhu@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: 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: SXiq8Dlvs04sZERfyLzjmvM9owT8ZG2m X-Proofpoint-GUID: SXiq8Dlvs04sZERfyLzjmvM9owT8ZG2m X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-12_04,2023-07-11_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1015 adultscore=0 mlxlogscore=955 priorityscore=1501 impostorscore=0 bulkscore=0 phishscore=0 malwarescore=0 mlxscore=0 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307120073 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add the notifier call chain to EUD driver. The notifier call chain is added to check the role-switch status of EUD. When multiple modules are switching roles on the same port, they need to call this notifier to check the role-switch status of EUD. If EUD is disabled, then the modules can go for the role-switch, otherwise it needs to be blocked. The notifier chain can be used to link multiple modules switching roles on the same port and create a ordering, priority and conflict resolution among them. The wrapper functions are defined here which can be used to register a notifier block to the chain, deregister it and also call the chain. Signed-off-by: Souradeep Chowdhury --- drivers/usb/misc/qcom_eud.c | 52 +++++++++++++++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 2 deletions(-) diff --git a/drivers/usb/misc/qcom_eud.c b/drivers/usb/misc/qcom_eud.c index 7f371ea1248c..e6c97a2cf2df 100644 --- a/drivers/usb/misc/qcom_eud.c +++ b/drivers/usb/misc/qcom_eud.c @@ -11,10 +11,13 @@ #include #include #include +#include +#include #include #include #include #include +#include "qcom_eud_notifier.h" #define EUD_REG_INT1_EN_MASK 0x0024 #define EUD_REG_INT_STATUS_1 0x0044 @@ -22,14 +25,16 @@ #define EUD_REG_VBUS_INT_CLR 0x0080 #define EUD_REG_CSR_EUD_EN 0x1014 #define EUD_REG_SW_ATTACH_DET 0x1018 -#define EUD_REG_EUD_EN2 0x0000 +#define EUD_REG_EUD_EN2 0x0000 #define EUD_ENABLE BIT(0) -#define EUD_INT_PET_EUD BIT(0) +#define EUD_INT_PET_EUD BIT(0) #define EUD_INT_VBUS BIT(2) #define EUD_INT_SAFE_MODE BIT(4) #define EUD_INT_ALL (EUD_INT_VBUS | EUD_INT_SAFE_MODE) +static RAW_NOTIFIER_HEAD(eud_nh); + struct eud_chip { struct device *dev; struct usb_role_switch *role_sw; @@ -41,6 +46,42 @@ struct eud_chip { bool usb_attached; }; +int eud_register_notify(struct notifier_block *nb) +{ + return raw_notifier_chain_register(&eud_nh, nb); +} +EXPORT_SYMBOL_GPL(eud_register_notify); + +void eud_unregister_notify(struct notifier_block *nb) +{ + raw_notifier_chain_unregister(&eud_nh, nb); +} +EXPORT_SYMBOL_GPL(eud_unregister_notify); + +void eud_notifier_call_chain(unsigned long role_switch_state) +{ + raw_notifier_call_chain(&eud_nh, role_switch_state, NULL); +} +EXPORT_SYMBOL_GPL(eud_notifier_call_chain); + +static int eud_vbus_spoof_attach_detach(struct notifier_block *nb, unsigned long event, + void *data) +{ + struct device_node *eud = of_find_compatible_node(NULL, NULL, "qcom,eud"); + struct device *eud_device = bus_find_device_by_of_node(&platform_bus_type, eud); + struct eud_chip *eud_data = dev_get_drvdata(eud_device); + + if (eud_data->enabled && event != USB_ROLE_DEVICE) + return NOTIFY_BAD; + else + return NOTIFY_OK; +} + +static struct notifier_block eud_notifier = { + .notifier_call = eud_vbus_spoof_attach_detach, + .priority = 1, +}; + static int enable_eud(struct eud_chip *priv) { writel(EUD_ENABLE, priv->base + EUD_REG_CSR_EUD_EN); @@ -196,6 +237,10 @@ static int eud_probe(struct platform_device *pdev) return dev_err_probe(chip->dev, ret, "failed to add role switch release action\n"); + ret = eud_register_notify(&eud_notifier); + if (ret) + return dev_err_probe(chip->dev, ret, "failed to register notifier\n"); + chip->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(chip->base)) return PTR_ERR(chip->base); @@ -226,6 +271,9 @@ static void eud_remove(struct platform_device *pdev) device_init_wakeup(&pdev->dev, false); disable_irq_wake(chip->irq); + eud_unregister_notify(&eud_notifier); + + return 0; } static const struct of_device_id eud_dt_match[] = { From patchwork Wed Jul 12 08:22:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souradeep Chowdhury X-Patchwork-Id: 13309794 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 493E9EB64DA for ; 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Wed, 12 Jul 2023 08:23:12 +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 36C8NBZp009460 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Jul 2023 08:23:11 GMT Received: from hu-schowdhu-blr.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 15.2.1118.30; Wed, 12 Jul 2023 01:23:07 -0700 From: Souradeep Chowdhury To: , , Andy Gross , Konrad Dybcio , "Bjorn Andersson" , CC: , , Sibi Sankar , Rajendra Nayak , Souradeep Chowdhury Subject: [PATCH V1 3/3] MAINTAINERS: Add the header file entry for Embedded USB debugger(EUD) Date: Wed, 12 Jul 2023 13:52:40 +0530 Message-ID: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: 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: _yvdB73eKuYn8LPXLSgJzcoMtbz0e7-k X-Proofpoint-ORIG-GUID: _yvdB73eKuYn8LPXLSgJzcoMtbz0e7-k X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-12_04,2023-07-11_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 bulkscore=0 spamscore=0 mlxlogscore=500 phishscore=0 clxscore=1015 mlxscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307120073 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add the entry for Embedded USB Debugger(EUD) header file which contains interface definitions for the EUD notifier chain. Signed-off-by: Souradeep Chowdhury --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index 3be1bdfe8ecc..6d395cc6f45c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17288,6 +17288,7 @@ L: linux-arm-msm@vger.kernel.org S: Maintained F: Documentation/ABI/testing/sysfs-driver-eud F: Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml +F: drivers/usb/misc/qcom_eud_notifier.h F: drivers/usb/misc/qcom_eud.c QCOM IPA DRIVER