From patchwork Tue Sep 30 16:58:47 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 38168 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-wi0-f197.google.com (mail-wi0-f197.google.com [209.85.212.197]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 2082E2032C for ; Tue, 30 Sep 2014 16:59:13 +0000 (UTC) Received: by mail-wi0-f197.google.com with SMTP id ho1sf3948858wib.0 for ; Tue, 30 Sep 2014 09:59:12 -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=KXfqZsrlPaYpCx82GYg8vDddSejTF5aSzAYiI3Ra4gI=; b=aUBgpWtPwl8GvbIFqQdw4lAh7sL5J9vs1p3tcFZ+5LMKmu6IBX0MFrPPVUzMjoQE2u gI+1619aTbq7Ezx/Ih0AGN5OzUtEa+WTZK+w29yi//5M+NZ0kz1T4h4XqD0EY1sbjroQ oBRa+799o4mpRKm9vMFV0EnXeyN4P+Jwbn8xLiNbbV8dUb/9+ie6408MpFWyJ0nDXVsY 8Zi160qlWk9TWFvOm+Sk9RqVgnLZUJn4fMrguwFy7eD6CWYYv41pdZP9clTYtgSTQPKY AgMdNcYiNkY4CGVmfM6k7HZvlXtxl92YiYMPMOLTKln3skTrvVHhKauPb6vI8M0eflr1 +04A== X-Gm-Message-State: ALoCoQlI3bxVJjwEqvOdoBWCRqLVGQOZIEvNh7z761N4l+QQqufkbKgSsh0hR6i2RZW0BZ8EwWN1 X-Received: by 10.112.126.228 with SMTP id nb4mr681969lbb.16.1412096352327; Tue, 30 Sep 2014 09:59:12 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.152.42.212 with SMTP id q20ls78272lal.22.gmail; Tue, 30 Sep 2014 09:59:12 -0700 (PDT) X-Received: by 10.112.78.98 with SMTP id a2mr44314921lbx.48.1412096352185; Tue, 30 Sep 2014 09:59:12 -0700 (PDT) Received: from mail-lb0-f178.google.com (mail-lb0-f178.google.com [209.85.217.178]) by mx.google.com with ESMTPS id u14si3562758laz.45.2014.09.30.09.59.12 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 30 Sep 2014 09:59:12 -0700 (PDT) Received-SPF: pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.178 as permitted sender) client-ip=209.85.217.178; Received: by mail-lb0-f178.google.com with SMTP id w7so3608096lbi.9 for ; Tue, 30 Sep 2014 09:59:12 -0700 (PDT) X-Received: by 10.152.5.168 with SMTP id t8mr48215968lat.67.1412096352045; Tue, 30 Sep 2014 09:59:12 -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 10.112.130.169 with SMTP id of9csp384927lbb; Tue, 30 Sep 2014 09:59:11 -0700 (PDT) X-Received: by 10.66.169.73 with SMTP id ac9mr64873049pac.102.1412096350439; Tue, 30 Sep 2014 09:59:10 -0700 (PDT) Received: from mail-pd0-f180.google.com (mail-pd0-f180.google.com [209.85.192.180]) by mx.google.com with ESMTPS id ci4si27657745pad.21.2014.09.30.09.59.09 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 30 Sep 2014 09:59:10 -0700 (PDT) Received-SPF: pass (google.com: domain of mathieu.poirier@linaro.org designates 209.85.192.180 as permitted sender) client-ip=209.85.192.180; Received: by mail-pd0-f180.google.com with SMTP id fp1so5507741pdb.25 for ; Tue, 30 Sep 2014 09:59:09 -0700 (PDT) X-Received: by 10.68.139.99 with SMTP id qx3mr26740994pbb.103.1412096349743; Tue, 30 Sep 2014 09:59:09 -0700 (PDT) Received: from t430.cg.shawcable.net (S0106002369de4dac.cg.shawcable.net. [70.73.24.112]) by mx.google.com with ESMTPSA id fo4sm15649083pbb.12.2014.09.30.09.59.07 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 30 Sep 2014 09:59:08 -0700 (PDT) From: mathieu.poirier@linaro.org To: linux@arm.linux.org.uk, gregkh@linuxfoundation.org Cc: pratikp@codeaurora.org, varshney@ti.com, Al.Grant@arm.com, jonas.svennebring@avagotech.com, james.king@linaro.org, kaixu.xia@linaro.org, marcin.jabrzyk@gmail.com, r.sengupta@samsung.com, robbelibobban@gmail.com, patches@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org Subject: [PATCH v7 03/11] coresight-tpiu: add CoreSight TPIU driver Date: Tue, 30 Sep 2014 10:58:47 -0600 Message-Id: <1412096335-18672-4-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1412096335-18672-1-git-send-email-mathieu.poirier@linaro.org> References: <1412096335-18672-1-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 209.85.217.178 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 CoreSight TPIU (Trace Port Interface Unit) which acts as a sink. TPIU is typically connected to some offchip hardware hosting a storage buffer. Signed-off-by: Pratik Patel Signed-off-by: Mathieu Poirier --- drivers/coresight/Makefile | 2 +- drivers/coresight/coresight-tpiu.c | 217 +++++++++++++++++++++++++++++++++++++ 2 files changed, 218 insertions(+), 1 deletion(-) create mode 100644 drivers/coresight/coresight-tpiu.c diff --git a/drivers/coresight/Makefile b/drivers/coresight/Makefile index 16e26c5..540df99 100644 --- a/drivers/coresight/Makefile +++ b/drivers/coresight/Makefile @@ -3,4 +3,4 @@ # obj-$(CONFIG_CORESIGHT) += coresight.o obj-$(CONFIG_OF) += of_coresight.o -obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-tmc.o +obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-tmc.o coresight-tpiu.o diff --git a/drivers/coresight/coresight-tpiu.c b/drivers/coresight/coresight-tpiu.c new file mode 100644 index 0000000..ae10108 --- /dev/null +++ b/drivers/coresight/coresight-tpiu.c @@ -0,0 +1,217 @@ +/* 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 "coresight-priv.h" + +#define TPIU_SUPP_PORTSZ 0x000 +#define TPIU_CURR_PORTSZ 0x004 +#define TPIU_SUPP_TRIGMODES 0x100 +#define TPIU_TRIG_CNTRVAL 0x104 +#define TPIU_TRIG_MULT 0x108 +#define TPIU_SUPP_TESTPATM 0x200 +#define TPIU_CURR_TESTPATM 0x204 +#define TPIU_TEST_PATREPCNTR 0x208 +#define TPIU_FFSR 0x300 +#define TPIU_FFCR 0x304 +#define TPIU_FSYNC_CNTR 0x308 +#define TPIU_EXTCTL_INPORT 0x400 +#define TPIU_EXTCTL_OUTPORT 0x404 +#define TPIU_ITTRFLINACK 0xee4 +#define TPIU_ITTRFLIN 0xee8 +#define TPIU_ITATBDATA0 0xeec +#define TPIU_ITATBCTR2 0xef0 +#define TPIU_ITATBCTR1 0xef4 +#define TPIU_ITATBCTR0 0xef8 + +/** register definition **/ +/* FFCR - 0x304 */ +#define FFCR_FON_MAN BIT(6) + +/** + * @base: memory mapped base address for this component. + * @dev: the device entity associated to this component. + * @csdev: component vitals needed by the framework. + * @clk: the clock this component is associated to. + */ +struct tpiu_drvdata { + void __iomem *base; + struct device *dev; + struct coresight_device *csdev; + struct clk *clk; +}; + +static void tpiu_enable_hw(struct tpiu_drvdata *drvdata) +{ + CS_UNLOCK(drvdata->base); + + /* TODO: fill this up */ + + CS_LOCK(drvdata->base); +} + +static int tpiu_enable(struct coresight_device *csdev) +{ + struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + int ret; + + ret = clk_prepare_enable(drvdata->clk); + if (ret) + return ret; + + tpiu_enable_hw(drvdata); + + dev_info(drvdata->dev, "TPIU enabled\n"); + return 0; +} + +static void tpiu_disable_hw(struct tpiu_drvdata *drvdata) +{ + CS_UNLOCK(drvdata->base); + + /* Clear formatter controle reg. */ + writel_relaxed(0x0, drvdata->base + TPIU_FFCR); + /* Generate manual flush */ + writel_relaxed(FFCR_FON_MAN, drvdata->base + TPIU_FFCR); + + CS_LOCK(drvdata->base); +} + +static void tpiu_disable(struct coresight_device *csdev) +{ + struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + + tpiu_disable_hw(drvdata); + + clk_disable_unprepare(drvdata->clk); + + dev_info(drvdata->dev, "TPIU disabled\n"); +} + +static const struct coresight_ops_sink tpiu_sink_ops = { + .enable = tpiu_enable, + .disable = tpiu_disable, +}; + +static const struct coresight_ops tpiu_cs_ops = { + .sink_ops = &tpiu_sink_ops, +}; + +static int tpiu_probe(struct amba_device *adev, const struct amba_id *id) +{ + int ret; + void __iomem *base; + struct device *dev = &adev->dev; + struct coresight_platform_data *pdata = NULL; + struct tpiu_drvdata *drvdata; + struct resource *res = &adev->res; + struct coresight_desc *desc; + struct device_node *np = adev->dev.of_node; + + if (np) { + pdata = of_get_coresight_platform_data(dev, np); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + adev->dev.platform_data = pdata; + } + + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->dev = &adev->dev; + dev_set_drvdata(dev, drvdata); + + /* Validity for the resource is already checked by the AMBA core */ + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + drvdata->base = base; + + drvdata->clk = adev->pclk; + ret = clk_prepare_enable(drvdata->clk); + if (ret) + return ret; + + /* Disable tpiu to support older devices */ + tpiu_disable_hw(drvdata); + + clk_disable_unprepare(drvdata->clk); + + desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); + if (!desc) + return -ENOMEM; + + desc->type = CORESIGHT_DEV_TYPE_SINK; + desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PORT; + desc->ops = &tpiu_cs_ops; + desc->pdata = pdata; + desc->dev = dev; + drvdata->csdev = coresight_register(desc); + if (IS_ERR(drvdata->csdev)) + return PTR_ERR(drvdata->csdev); + + dev_info(dev, "TPIU initialized\n"); + return 0; +} + +static int tpiu_remove(struct amba_device *adev) +{ + struct tpiu_drvdata *drvdata = amba_get_drvdata(adev); + + coresight_unregister(drvdata->csdev); + return 0; +} + +static struct amba_id tpiu_ids[] = { + { + .id = 0x0003b912, + .mask = 0x0003ffff, + }, + { 0, 0}, +}; + +static struct amba_driver tpiu_driver = { + .drv = { + .name = "coresight-tpiu", + .owner = THIS_MODULE, + }, + .probe = tpiu_probe, + .remove = tpiu_remove, + .id_table = tpiu_ids, +}; + +static int __init tpiu_init(void) +{ + return amba_driver_register(&tpiu_driver); +} +module_init(tpiu_init); + +static void __exit tpiu_exit(void) +{ + amba_driver_unregister(&tpiu_driver); +} +module_exit(tpiu_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("CoreSight Trace Port Interface Unit driver");