From patchwork Mon Feb 13 19:31:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elson Roy Serrao X-Patchwork-Id: 653443 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 D0284C636CC for ; Mon, 13 Feb 2023 19:31:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231229AbjBMTb3 (ORCPT ); Mon, 13 Feb 2023 14:31:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229468AbjBMTb2 (ORCPT ); Mon, 13 Feb 2023 14:31:28 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33FEE272C; Mon, 13 Feb 2023 11:31:27 -0800 (PST) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31DIffsL027070; Mon, 13 Feb 2023 19:31:22 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; s=qcppdkim1; bh=iKFu+nmfvMXaR2s9ABZhifpl1tABmCamoa5lPYvIZmA=; b=C1uWfr7pIPRWCL19X1nVEWIadwuu3o7XHlE8/HFvE0kzhZANVRRG+Z1dGlVRGvAqCjSJ iTwJcIHc3r5YeZ/y+8B+1XbK6gqiWJe3X3E2RunRnPvs28JID3DNOsQGjcpTuwilj8iG R+pXRwax2ybCX+TGtqkhXdybc3Q2YL5lWLMs+C22SC0ZxNCQqwYEEismmH79R3jNvCC2 kEP5dHNVFyYm8QQGKSf7TWmRSbPH2/hz77ouuj2G/bCy6IyfjTCt039i2zEcskaABbpu /Zy/8xi80FbpWDYxf7PiFk9EbBwipDjCZnF2Bhf3Bg9wynrLREl8Syj77moX1vO6eJge lg== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3np0qpw1q9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Feb 2023 19:31:22 +0000 Received: from pps.filterd (NALASPPMTA02.qualcomm.com [127.0.0.1]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 31DJSr22023923; Mon, 13 Feb 2023 19:31:21 GMT Received: from pps.reinject (localhost [127.0.0.1]) by NALASPPMTA02.qualcomm.com (PPS) with ESMTP id 3np43mb473-1; Mon, 13 Feb 2023 19:31:21 +0000 Received: from NALASPPMTA02.qualcomm.com (NALASPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 31DJVL9O026806; Mon, 13 Feb 2023 19:31:21 GMT Received: from hu-devc-lv-c.qualcomm.com (hu-eserrao-lv.qualcomm.com [10.47.235.164]) by NALASPPMTA02.qualcomm.com (PPS) with ESMTP id 31DJVLMp026804; Mon, 13 Feb 2023 19:31:21 +0000 Received: by hu-devc-lv-c.qualcomm.com (Postfix, from userid 464172) id 8C39A20E2A; Mon, 13 Feb 2023 11:31:21 -0800 (PST) From: Elson Roy Serrao To: gregkh@linuxfoundation.org, Thinh.Nguyen@synopsys.com, balbi@kernel.org Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, quic_wcheng@quicinc.com, quic_jackp@quicinc.com, Elson Roy Serrao Subject: [PATCH v4 1/5] usb: gadget: Properly configure the device for remote wakeup Date: Mon, 13 Feb 2023 11:31:12 -0800 Message-Id: <1676316676-28377-2-git-send-email-quic_eserrao@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1676316676-28377-1-git-send-email-quic_eserrao@quicinc.com> References: <1676316676-28377-1-git-send-email-quic_eserrao@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 8voTCZGXCiUHOrgfVr6wZQm9pErV6HaY X-Proofpoint-ORIG-GUID: 8voTCZGXCiUHOrgfVr6wZQm9pErV6HaY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-13_12,2023-02-13_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 malwarescore=0 phishscore=0 adultscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 bulkscore=0 mlxlogscore=739 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302130170 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The wakeup bit in the bmAttributes field indicates whether the device is configured for remote wakeup. But this field should be allowed to set only if the UDC supports such wakeup mechanism. So configure this field based on UDC capability. Also inform the UDC whether the device is configured for remote wakeup by implementing a gadget op. Signed-off-by: Elson Roy Serrao Reviewed-by: Thinh Nguyen --- drivers/usb/gadget/composite.c | 18 ++++++++++++++++++ drivers/usb/gadget/configfs.c | 3 +++ drivers/usb/gadget/udc/core.c | 27 +++++++++++++++++++++++++++ drivers/usb/gadget/udc/trace.h | 5 +++++ include/linux/usb/composite.h | 2 ++ include/linux/usb/gadget.h | 8 ++++++++ 6 files changed, 63 insertions(+) diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index fa7dd6c..a37a8f4 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -513,6 +513,19 @@ static u8 encode_bMaxPower(enum usb_device_speed speed, return min(val, 900U) / 8; } +void check_remote_wakeup_config(struct usb_gadget *g, + struct usb_configuration *c) +{ + if (USB_CONFIG_ATT_WAKEUP & c->bmAttributes) { + /* Reset the rw bit if gadget is not capable of it */ + if (!g->wakeup_capable && g->ops->set_remote_wakeup) { + WARN(c->cdev, "Clearing wakeup bit for config c.%d\n", + c->bConfigurationValue); + c->bmAttributes &= ~USB_CONFIG_ATT_WAKEUP; + } + } +} + static int config_buf(struct usb_configuration *config, enum usb_device_speed speed, void *buf, u8 type) { @@ -1000,6 +1013,11 @@ static int set_config(struct usb_composite_dev *cdev, else usb_gadget_clear_selfpowered(gadget); + if (USB_CONFIG_ATT_WAKEUP & c->bmAttributes) + usb_gadget_set_remote_wakeup(gadget, 1); + else + usb_gadget_set_remote_wakeup(gadget, 0); + usb_gadget_vbus_draw(gadget, power); if (result >= 0 && cdev->delayed_status) result = USB_GADGET_DELAYED_STATUS; diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index b9f1136..4c639e9 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -1761,6 +1761,9 @@ static int configfs_composite_bind(struct usb_gadget *gadget, if (gadget_is_otg(gadget)) c->descriptors = otg_desc; + /* Properly configure the bmAttributes wakeup bit */ + check_remote_wakeup_config(gadget, c); + cfg = container_of(c, struct config_usb_cfg, c); if (!list_empty(&cfg->string_list)) { i = 0; diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 23b0629..3dcbba7 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -514,6 +514,33 @@ int usb_gadget_wakeup(struct usb_gadget *gadget) EXPORT_SYMBOL_GPL(usb_gadget_wakeup); /** + * usb_gadget_set_remote_wakeup - configures the device remote wakeup feature. + * @gadget:the device being configured for remote wakeup + * @set:value to be configured. + * + * set to one to enable remote wakeup feature and zero to disable it. + * + * returns zero on success, else negative errno. + */ +int usb_gadget_set_remote_wakeup(struct usb_gadget *gadget, int set) +{ + int ret = 0; + + if (!gadget->ops->set_remote_wakeup) { + ret = -EOPNOTSUPP; + goto out; + } + + ret = gadget->ops->set_remote_wakeup(gadget, set); + +out: + trace_usb_gadget_set_remote_wakeup(gadget, ret); + + return ret; +} +EXPORT_SYMBOL_GPL(usb_gadget_set_remote_wakeup); + +/** * usb_gadget_set_selfpowered - sets the device selfpowered feature. * @gadget:the device being declared as self-powered * diff --git a/drivers/usb/gadget/udc/trace.h b/drivers/usb/gadget/udc/trace.h index abdbcb1..a5ed26f 100644 --- a/drivers/usb/gadget/udc/trace.h +++ b/drivers/usb/gadget/udc/trace.h @@ -91,6 +91,11 @@ DEFINE_EVENT(udc_log_gadget, usb_gadget_wakeup, TP_ARGS(g, ret) ); +DEFINE_EVENT(udc_log_gadget, usb_gadget_set_remote_wakeup, + TP_PROTO(struct usb_gadget *g, int ret), + TP_ARGS(g, ret) +); + DEFINE_EVENT(udc_log_gadget, usb_gadget_set_selfpowered, TP_PROTO(struct usb_gadget *g, int ret), TP_ARGS(g, ret) diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index 608dc96..d949e91 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -413,6 +413,8 @@ extern int composite_dev_prepare(struct usb_composite_driver *composite, extern int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, struct usb_ep *ep0); void composite_dev_cleanup(struct usb_composite_dev *cdev); +void check_remote_wakeup_config(struct usb_gadget *g, + struct usb_configuration *c); static inline struct usb_composite_driver *to_cdriver( struct usb_gadget_driver *gdrv) diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 00750f7..1d79612 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -310,6 +310,7 @@ struct usb_udc; struct usb_gadget_ops { int (*get_frame)(struct usb_gadget *); int (*wakeup)(struct usb_gadget *); + int (*set_remote_wakeup)(struct usb_gadget *, int set); int (*set_selfpowered) (struct usb_gadget *, int is_selfpowered); int (*vbus_session) (struct usb_gadget *, int is_active); int (*vbus_draw) (struct usb_gadget *, unsigned mA); @@ -384,6 +385,8 @@ struct usb_gadget_ops { * @connected: True if gadget is connected. * @lpm_capable: If the gadget max_speed is FULL or HIGH, this flag * indicates that it supports LPM as per the LPM ECN & errata. + * @wakeup_capable: True if gadget is capable of sending remote wakeup. + * @wakeup_armed: True if gadget is armed by the host for remote wakeup. * @irq: the interrupt number for device controller. * @id_number: a unique ID number for ensuring that gadget names are distinct * @@ -445,6 +448,8 @@ struct usb_gadget { unsigned deactivated:1; unsigned connected:1; unsigned lpm_capable:1; + unsigned wakeup_capable:1; + unsigned wakeup_armed:1; int irq; int id_number; }; @@ -601,6 +606,7 @@ static inline int gadget_is_otg(struct usb_gadget *g) #if IS_ENABLED(CONFIG_USB_GADGET) int usb_gadget_frame_number(struct usb_gadget *gadget); int usb_gadget_wakeup(struct usb_gadget *gadget); +int usb_gadget_set_remote_wakeup(struct usb_gadget *gadget, int set); int usb_gadget_set_selfpowered(struct usb_gadget *gadget); int usb_gadget_clear_selfpowered(struct usb_gadget *gadget); int usb_gadget_vbus_connect(struct usb_gadget *gadget); @@ -616,6 +622,8 @@ static inline int usb_gadget_frame_number(struct usb_gadget *gadget) { return 0; } static inline int usb_gadget_wakeup(struct usb_gadget *gadget) { return 0; } +static inline int usb_gadget_set_remote_wakeup(struct usb_gadget *gadget, int set) +{ return 0; } static inline int usb_gadget_set_selfpowered(struct usb_gadget *gadget) { return 0; } static inline int usb_gadget_clear_selfpowered(struct usb_gadget *gadget)