From patchwork Sat Aug 29 05:58:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 258731 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDACFC433E2 for ; Sat, 29 Aug 2020 05:59:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C23D20EDD for ; Sat, 29 Aug 2020 05:59:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="ZrF5l2L4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726333AbgH2F7g (ORCPT ); Sat, 29 Aug 2020 01:59:36 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:50509 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726791AbgH2F7b (ORCPT ); Sat, 29 Aug 2020 01:59:31 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1598680771; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=0SSYopABa/u9gVBP57j7CY/l/03XJjz9Ka506GoE6BQ=; b=ZrF5l2L4T4G7zUYAcooAZ51ZF2iZ//1F3lpIKIQQN2JyryiA+0TI5+DtZ5IKrIWG+wuKJ+Xh DsrYCrZUQgbkEP5J4LErI5A097p0T5yhmgZSyP1eqYCif6L0Nu9Tv0p2GQPsdkSuh+RQcMOL r0amzOHSQfB8dkcAfZu1PRqVCfw= X-Mailgun-Sending-Ip: 69.72.43.7 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-n07.prod.us-west-2.postgun.com with SMTP id 5f49ee9ea2622b2833563832 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Sat, 29 Aug 2020 05:58:54 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 70690C433A0; Sat, 29 Aug 2020 05:58:54 +0000 (UTC) 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 790A0C433CA; Sat, 29 Aug 2020 05:58:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 790A0C433CA 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=none smtp.mailfrom=wcheng@codeaurora.org From: Wesley Cheng To: robh+dt@kernel.org, bjorn.andersson@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org, agross@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, jackp@codeaurora.org, Wesley Cheng Subject: [RFC v5 5/6] usb: gadget: udc: core: Introduce check_config to verify USB configuration Date: Fri, 28 Aug 2020 22:58:45 -0700 Message-Id: <20200829055846.19034-6-wcheng@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200829055846.19034-1-wcheng@codeaurora.org> References: <20200829055846.19034-1-wcheng@codeaurora.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some UDCs may have constraints on how many high bandwidth endpoints it can support in a certain configuration. This API allows for the composite driver to pass down the total number of endpoints to the UDC so it can verify it has the required resources to support the configuration. Signed-off-by: Wesley Cheng --- drivers/usb/gadget/udc/core.c | 9 +++++++++ include/linux/usb/gadget.h | 2 ++ 2 files changed, 11 insertions(+) diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index c33ad8a333ad..e006d69dff9b 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -1001,6 +1001,15 @@ int usb_gadget_ep_match_desc(struct usb_gadget *gadget, } EXPORT_SYMBOL_GPL(usb_gadget_ep_match_desc); +int usb_gadget_check_config(struct usb_gadget *gadget, unsigned long ep_map) +{ + if (!gadget->ops->check_config) + return 0; + + return gadget->ops->check_config(gadget, ep_map); +} +EXPORT_SYMBOL_GPL(usb_gadget_check_config); + /* ------------------------------------------------------------------------- */ static void usb_gadget_state_work(struct work_struct *work) diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 52ce1f6b8f83..791ae5b352a1 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -326,6 +326,7 @@ struct usb_gadget_ops { struct usb_ep *(*match_ep)(struct usb_gadget *, struct usb_endpoint_descriptor *, struct usb_ss_ep_comp_descriptor *); + int (*check_config)(struct usb_gadget *gadget, unsigned long ep_map); }; /** @@ -575,6 +576,7 @@ int usb_gadget_connect(struct usb_gadget *gadget); int usb_gadget_disconnect(struct usb_gadget *gadget); int usb_gadget_deactivate(struct usb_gadget *gadget); int usb_gadget_activate(struct usb_gadget *gadget); +int usb_gadget_check_config(struct usb_gadget *gadget, unsigned long ep_map); #else static inline int usb_gadget_frame_number(struct usb_gadget *gadget) { return 0; }