From patchwork Thu Aug 7 18:21:42 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 35061 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-pd0-f198.google.com (mail-pd0-f198.google.com [209.85.192.198]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id CD09921457 for ; Thu, 7 Aug 2014 18:22:49 +0000 (UTC) Received: by mail-pd0-f198.google.com with SMTP id fp1sf25982817pdb.9 for ; Thu, 07 Aug 2014 11:22:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-unsubscribe; bh=f1OiP7VViq71+Ks5Gq9Ve1BpnPIH5c0YCJtBnBpukw0=; b=D+5tLah1xxp+tVYGeNmkCCndXuFHi66NELd5z23R4vgozNHUJZBazMEzCiJYtTG+IX glSClQMoXl93s5OFGKiUbo8szXpyFVik183yNb9iKO1NmL7NLExLauQH6L4tESIXn8Ey k/G3IPCYhLx/rK0Gnx8ShJnpqT9xLbA9Qo6HXhi/Ao+smj0zdTKCfQrcRAr9Vs8fwnZu uh6ku7/+EPIo3LSS+3KWY5nkrBHh2FOnjwMCyb6brB4Tl3a+d2YHrz1OXtn95TN3+x/5 2dsdQWFcYfb6xBgqkkDZvSAGN91ay7sJP9DmI0Xx+nZm+ub16NiRMUiLEloFDXlPLQGR RBQg== X-Gm-Message-State: ALoCoQn+2pVfAPYWNuFL59MMS5XW62CUDAy6jrDgHQiyAmuQTlz7xZMDV5ovAYFF6FpnU7Eeb/1K X-Received: by 10.68.116.42 with SMTP id jt10mr9940439pbb.5.1407435769095; Thu, 07 Aug 2014 11:22:49 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.140.102.202 with SMTP id w68ls221163qge.4.gmail; Thu, 07 Aug 2014 11:22:49 -0700 (PDT) X-Received: by 10.221.9.72 with SMTP id ov8mr17742631vcb.27.1407435768983; Thu, 07 Aug 2014 11:22:48 -0700 (PDT) Received: from mail-vc0-f180.google.com (mail-vc0-f180.google.com [209.85.220.180]) by mx.google.com with ESMTPS id b11si2067411vdv.62.2014.08.07.11.22.48 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 07 Aug 2014 11:22:48 -0700 (PDT) Received-SPF: pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.220.180 as permitted sender) client-ip=209.85.220.180; Received: by mail-vc0-f180.google.com with SMTP id ij19so6796290vcb.39 for ; Thu, 07 Aug 2014 11:22:48 -0700 (PDT) X-Received: by 10.220.15.8 with SMTP id i8mr2645511vca.45.1407435768774; Thu, 07 Aug 2014 11:22:48 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.221.37.5 with SMTP id tc5csp50883vcb; Thu, 7 Aug 2014 11:22:43 -0700 (PDT) X-Received: by 10.70.0.48 with SMTP id 16mr19463886pdb.8.1407435760659; Thu, 07 Aug 2014 11:22:40 -0700 (PDT) Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by mx.google.com with ESMTPS id xi3si4105936pab.111.2014.08.07.11.22.39 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 07 Aug 2014 11:22:40 -0700 (PDT) Received-SPF: pass (google.com: domain of mathieu.poirier@linaro.org designates 209.85.220.53 as permitted sender) client-ip=209.85.220.53; Received: by mail-pa0-f53.google.com with SMTP id rd3so5819637pab.40 for ; Thu, 07 Aug 2014 11:22:39 -0700 (PDT) X-Received: by 10.66.167.105 with SMTP id zn9mr18482028pab.103.1407435759090; Thu, 07 Aug 2014 11:22:39 -0700 (PDT) Received: from t430.cg.shawcable.net (S0106002369de4dac.cg.shawcable.net. [70.73.24.112]) by mx.google.com with ESMTPSA id x9sm621439pdi.88.2014.08.07.11.22.37 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 07 Aug 2014 11:22:38 -0700 (PDT) From: mathieu.poirier@linaro.org To: linus.walleij@linaro.org, will.deacon@arm.com, linux@arm.linux.org.uk, robherring2@gmail.com, daniel.thompson@linaro.org Cc: mathieu.poirier@linaro.org, arve@android.com, john.stultz@linaro.org, pratikp@codeaurora.org, varshney@ti.com, Al.Grant@arm.com, jonas.svennebring@avagotech.com, james.king@linaro.org, panchaxari.prasannamurthy@linaro.org, marcin.jabrzyk@gmail.com, r.sengupta@samsung.com, robbelibobban@gmail.com, Tony.Armitstead@arm.com, patches@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 06/10 v3] coresight-replicator: add CoreSight Replicator driver Date: Thu, 7 Aug 2014 12:21:42 -0600 Message-Id: <1407435706-19441-7-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1407435706-19441-1-git-send-email-mathieu.poirier@linaro.org> References: <1407435706-19441-1-git-send-email-mathieu.poirier@linaro.org> X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: mathieu.poirier@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.220.180 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , From: Pratik Patel This driver manages non-configurable CoreSight Replicator that takes a single input trace data stream and replicates it to produce two identical trace data output streams. Replicators are typically used to route single interleaved trace data stream to two or more sinks. Signed-off-by: Pratik Patel Signed-off-by: Panchaxari Prasannamurthy Signed-off-by: Mathieu Poirier --- drivers/coresight/Makefile | 3 +- drivers/coresight/coresight-replicator.c | 153 +++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+), 1 deletion(-) create mode 100644 drivers/coresight/coresight-replicator.c diff --git a/drivers/coresight/Makefile b/drivers/coresight/Makefile index 26a07e1..3a32c06 100644 --- a/drivers/coresight/Makefile +++ b/drivers/coresight/Makefile @@ -4,4 +4,5 @@ obj-$(CONFIG_CORESIGHT) += coresight.o obj-$(CONFIG_OF) += of_coresight.o obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-tmc.o coresight-tpiu.o \ - coresight-etb10.o coresight-funnel.o + coresight-etb10.o coresight-funnel.o \ + coresight-replicator.o diff --git a/drivers/coresight/coresight-replicator.c b/drivers/coresight/coresight-replicator.c new file mode 100644 index 0000000..24286c6 --- /dev/null +++ b/drivers/coresight/coresight-replicator.c @@ -0,0 +1,153 @@ +/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "coresight-priv.h" + +struct replicator_drvdata { + struct device *dev; + struct coresight_device *csdev; +}; + +static int replicator_enable(struct coresight_device *csdev, int inport, + int outport) +{ + struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + + dev_info(drvdata->dev, "REPLICATOR enabled\n"); + return 0; +} + +static void replicator_disable(struct coresight_device *csdev, int inport, + int outport) +{ + struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + + dev_info(drvdata->dev, "REPLICATOR disabled\n"); +} + +static char *replicator_fix_name(struct device *dev, int id) +{ + char *name; + int ret, size; + + size = (sizeof(u64) * 2) + strlen(".replicator") + 1; + name = devm_kzalloc(dev, size, GFP_KERNEL); + if (!name) + return NULL; + + ret = scnprintf(name, size, "%08x.replicator", id); + + return name; +} + +static const struct coresight_ops_link replicator_link_ops = { + .enable = replicator_enable, + .disable = replicator_disable, +}; + +static const struct coresight_ops replicator_cs_ops = { + .link_ops = &replicator_link_ops, +}; + +static int replicator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct coresight_platform_data *pdata = NULL; + struct replicator_drvdata *drvdata; + struct coresight_desc *desc; + struct device_node *np = pdev->dev.of_node; + + if (np) { + pdata = of_get_coresight_platform_data(dev, np); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + pdev->dev.platform_data = pdata; + + pdata->name = replicator_fix_name(dev, pdata->id); + if (!pdata->name) + return -EINVAL; + } + + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->dev = &pdev->dev; + platform_set_drvdata(pdev, drvdata); + + desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); + if (!desc) + return -ENOMEM; + + desc->type = CORESIGHT_DEV_TYPE_LINK; + desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT; + desc->ops = &replicator_cs_ops; + desc->pdata = pdev->dev.platform_data; + desc->dev = &pdev->dev; + desc->owner = THIS_MODULE; + drvdata->csdev = coresight_register(desc); + if (IS_ERR(drvdata->csdev)) + return PTR_ERR(drvdata->csdev); + + dev_info(dev, "REPLICATOR initialized\n"); + return 0; +} + +static int replicator_remove(struct platform_device *pdev) +{ + struct replicator_drvdata *drvdata = platform_get_drvdata(pdev); + + coresight_unregister(drvdata->csdev); + return 0; +} + +static struct of_device_id replicator_match[] = { + {.compatible = "arm,coresight-replicator"}, + {} +}; + +static struct platform_driver replicator_driver = { + .probe = replicator_probe, + .remove = replicator_remove, + .driver = { + .name = "coresight-replicator", + .owner = THIS_MODULE, + .of_match_table = replicator_match, + }, +}; + +static int __init replicator_init(void) +{ + return platform_driver_register(&replicator_driver); +} +module_init(replicator_init); + +static void __exit replicator_exit(void) +{ + platform_driver_unregister(&replicator_driver); +} +module_exit(replicator_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("CoreSight Replicator driver");