From patchwork Sat Nov 14 08:12:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 11905463 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9F6FE697 for ; Sat, 14 Nov 2020 08:13:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 76F1622254 for ; Sat, 14 Nov 2020 08:13:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="tUC+OKlp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726638AbgKNINE (ORCPT ); Sat, 14 Nov 2020 03:13:04 -0500 Received: from m42-4.mailgun.net ([69.72.42.4]:34202 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726481AbgKNINC (ORCPT ); Sat, 14 Nov 2020 03:13:02 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1605341581; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=EcGr7jPbsIV016J8qpPWQhkLnpm44nvrJJGdYGx4j2I=; b=tUC+OKlpfuagRwbb7XxpGaK+adQ4bzvTM+6s2rPvzbphUDwaMfzuO2SQGW/BsJI7DfvVuuUJ F4besLpzNRIuz8fT0s5VY3+cZMYWGYJRn1Wvetubkoe411WS+gwHfpN65SprAngkHlFr82jB N4K6FRHSb5LzIl+zjtFa3w7lc1g= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyIxZTE2YSIsICJsaW51eC11c2JAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n03.prod.us-west-2.postgun.com with SMTP id 5faf9184e9dd187f531564c2 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Sat, 14 Nov 2020 08:12:52 GMT Sender: wcheng=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id C9005C433FF; Sat, 14 Nov 2020 08:12:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00,SPF_FAIL autolearn=no autolearn_force=no version=3.4.0 Received: from wcheng-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: wcheng) by smtp.codeaurora.org (Postfix) with ESMTPSA id D80CCC433C6; Sat, 14 Nov 2020 08:12:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org D80CCC433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=wcheng@codeaurora.org From: Wesley Cheng To: balbi@kernel.org, gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, jackp@codeaurora.org, Wesley Cheng Subject: [PATCH 0/3] Add vbus draw support to DWC3 Date: Sat, 14 Nov 2020 00:12:44 -0800 Message-Id: <20201114081247.25063-1-wcheng@codeaurora.org> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some devices are connected to standard downstream ports (SDP) and draw current from them. The current rates are defined in the BC1.2 specification, and highlights the different charge rates depending on the device state. The DWC3 gadget does not currently have a mechanism to notify external drivers about how much current can be drawn. The current rates are notified by the USB gadget layer, and the DWC3 gadget will propagate this potentially to external charger drivers. Also, the USB gadget needs to be fixed to only allow 100mA current draw when receiving a bus reset from the host, as the BC1.2 specification states that this is the max current draw possible when in the connected and unconfigured state. Wesley Cheng (3): usb: dwc3: gadget: Introduce a DWC3 VBUS draw callback usb: gadget: composite: Split composite reset and disconnect usb: gadget: configfs: Add a specific configFS reset callback drivers/usb/dwc3/gadget.c | 11 +++++++++++ drivers/usb/gadget/composite.c | 21 +++++++++++++++++++-- drivers/usb/gadget/configfs.c | 24 +++++++++++++++++++++++- include/linux/usb/composite.h | 2 ++ 4 files changed, 55 insertions(+), 3 deletions(-)