From patchwork Fri Jun 26 14:46:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deepak Kumar Singh X-Patchwork-Id: 11627711 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 7991E912 for ; Fri, 26 Jun 2020 14:47:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60FFD2053B for ; Fri, 26 Jun 2020 14:47:29 +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="T1AJFehA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729359AbgFZOr1 (ORCPT ); Fri, 26 Jun 2020 10:47:27 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:14475 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729415AbgFZOr0 (ORCPT ); Fri, 26 Jun 2020 10:47:26 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1593182845; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=PWopmoPYmvBb6c4l4UvCri+PTIKOehyoMRDeBLGjvow=; b=T1AJFehA4qb676p0KZoR40dAbmJZ86thSRCFUlVMXKEmF4XHyIufleAfgTmp9Vr0MsKPz82R 0BfbE85rCfHxEqI/1lix4Z7HOcGc7DdIzpXGQJdRebcr1Yp/PnJoTbnDIwFcJAW1WlMRWbkq vaX5ETO0/IudqqoYgK3vrOmZ4MU= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI4ZWZiZiIsICJsaW51eC1yZW1vdGVwcm9jQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n14.prod.us-east-1.postgun.com with SMTP id 5ef60a79356bcc26ab20abac (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 26 Jun 2020 14:47:21 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id E21E4C433C6; Fri, 26 Jun 2020 14:47:20 +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=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from deesin-linux.qualcomm.com (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: deesin) by smtp.codeaurora.org (Postfix) with ESMTPSA id BD23FC433C8; Fri, 26 Jun 2020 14:47:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BD23FC433C8 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=deesin@codeaurora.org From: Deepak Kumar Singh To: bjorn.andersson@linaro.org, clew@codeaurora.org, mathieu.poirier@linaro.org Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam , Deepak Kumar Singh Subject: [PATCH V6 3/4] rpmsg: char: Add TIOCMGET/TIOCMSET ioctl support Date: Fri, 26 Jun 2020 20:16:58 +0530 Message-Id: <1593182819-30747-4-git-send-email-deesin@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1593182819-30747-1-git-send-email-deesin@codeaurora.org> References: <1593182819-30747-1-git-send-email-deesin@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org From: Arun Kumar Neelakantam Add TICOMGET and TIOCMSET ioctl support for rpmsg char device nodes to get/set the low level transport signals. Signed-off-by: Deepak Kumar Singh Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/rpmsg_char.c | 54 +++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 51 insertions(+), 3 deletions(-) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 4bbbacd..43ceac0 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* + * Copyright (c) 2018, The Linux Foundation. * Copyright (c) 2016, Linaro Ltd. * Copyright (c) 2012, Michal Simek * Copyright (c) 2012, PetaLogix @@ -19,6 +20,7 @@ #include #include #include +#include #include #include @@ -269,15 +271,61 @@ static __poll_t rpmsg_eptdev_poll(struct file *filp, poll_table *wait) return mask; } +static int rpmsg_eptdev_tiocmset(struct file *fp, unsigned int cmd, + int __user *arg) +{ + struct rpmsg_eptdev *eptdev = fp->private_data; + u32 set, clear, val; + int ret; + + ret = get_user(val, arg); + if (ret) + return ret; + set = clear = 0; + switch (cmd) { + case TIOCMBIS: + set = val; + break; + case TIOCMBIC: + clear = val; + break; + case TIOCMSET: + set = val; + clear = ~val; + break; + } + + set &= TIOCM_DTR | TIOCM_RTS | TIOCM_CD | TIOCM_RI; + clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_CD | TIOCM_RI; + + return rpmsg_set_signals(eptdev->ept, set, clear); +} + static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) { struct rpmsg_eptdev *eptdev = fp->private_data; + int ret; - if (cmd != RPMSG_DESTROY_EPT_IOCTL) - return -EINVAL; + switch (cmd) { + case TIOCMGET: + ret = rpmsg_get_signals(eptdev->ept); + if (ret >= 0) + ret = put_user(ret, (int __user *)arg); + break; + case TIOCMSET: + case TIOCMBIS: + case TIOCMBIC: + ret = rpmsg_eptdev_tiocmset(fp, cmd, (int __user *)arg); + break; + case RPMSG_DESTROY_EPT_IOCTL: + ret = rpmsg_eptdev_destroy(&eptdev->dev, NULL); + break; + default: + ret = -EINVAL; + } - return rpmsg_eptdev_destroy(&eptdev->dev, NULL); + return ret; } static const struct file_operations rpmsg_eptdev_fops = {