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[70.73.24.112]) by mx.google.com with ESMTPSA id j15sm1356689pdm.86.2014.08.27.10.18.09 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 27 Aug 2014 10:18:10 -0700 (PDT) From: mathieu.poirier@linaro.org To: thomas.petazzoni@free-electrons.com, will.deacon@arm.com, linux@arm.linux.org.uk, gregkh@linuxfoundation.org, arnd@linaro.org Cc: 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, kaixu.xia@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, mathieu.poirier@linaro.org Subject: [PATCH 06/11 v5] coresight-replicator: add CoreSight Replicator driver Date: Wed, 27 Aug 2014 11:17:27 -0600 Message-Id: <1409159852-7249-7-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409159852-7249-1-git-send-email-mathieu.poirier@linaro.org> References: <1409159852-7249-1-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 209.85.160.177 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 Reviewed-by: Linus Walleij --- 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");