The Linux coresight drivers define the programmable ATB replicator as
Qualcomm replicator, while this is designed by ARM. This can cause confusion
to a user selecting the driver. Cleanup all references to make it
explicitly clear. This patch :
1) Replace the compatible string for the replicator :
qcom,coresight-replicator1x => arm,coresight-dynamic-replicator
2) Changes the Kconfig symbol (since this is not part of any defconfigs)
CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
3) Improves the help message in the Kconfig.
4) Changes the name of the driver and the file :
coresight-replicator-qcom => coresight-dynamic-replicator
Cc: Pratik Patel <prat...@codeaurora.org>
Cc: Ivan T. Ivanov <ivan.iva...@linaro.org>
Cc: Mathieu Poirier <mathieu.poir...@linaro.org>
Cc: devicet...@vger.kernel.org
Cc: Mark Rutland <mark.rutl...@arm.com>
Acked-by: Rob Herring <robh...@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com>
---
Changes since V1:
- Since the driver doesn't use the compatible string, change the
recommended compatible string.
- Rename the driver file to coresight-dynamic-replicator.c
---
.../devicetree/bindings/arm/coresight.txt | 4 +-
drivers/hwtracing/coresight/Kconfig | 10 +-
drivers/hwtracing/coresight/Makefile | 2 +-
.../coresight/coresight-dynamic-replicator.c | 195 ++++++++++++++++++++
.../coresight/coresight-replicator-qcom.c | 196 ---------------------
5 files changed, 203 insertions(+), 204 deletions(-)
create mode 100644 drivers/hwtracing/coresight/coresight-dynamic-replicator.c
delete mode 100644 drivers/hwtracing/coresight/coresight-replicator-qcom.c
diff --git a/Documentation/devicetree/bindings/arm/coresight.txt
b/Documentation/devicetree/bindings/arm/coresight.txt
index fcbae6a..15ac8e8 100644
--- a/Documentation/devicetree/bindings/arm/coresight.txt
+++ b/Documentation/devicetree/bindings/arm/coresight.txt
@@ -34,8 +34,8 @@ its hardware characteristcs.
- Embedded Trace Macrocell (version 4.x):
"arm,coresight-etm4x", "arm,primecell";
- - Qualcomm Configurable Replicator (version 1.x):
- "qcom,coresight-replicator1x", "arm,primecell";
+ - Coresight programmable Replicator :
+ "arm,coresight-dynamic-replicator", "arm,primecell";
- System Trace Macrocell:
"arm,coresight-stm", "arm,primecell"; [1]
diff --git a/drivers/hwtracing/coresight/Kconfig
b/drivers/hwtracing/coresight/Kconfig
index 8d55d6d..ef9cb3c 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -70,13 +70,13 @@ config CORESIGHT_SOURCE_ETM4X
for instruction level tracing. Depending on the implemented version
data tracing may also be available.
-config CORESIGHT_QCOM_REPLICATOR
- bool "Qualcomm CoreSight Replicator driver"
+config CORESIGHT_DYNAMIC_REPLICATOR
+ bool "CoreSight Programmable Replicator driver"
depends on CORESIGHT_LINKS_AND_SINKS
help
- This enables support for Qualcomm CoreSight link driver. The
- programmable ATB replicator sends the ATB trace stream from the
- ETB/ETF to the TPIUi and ETR.
+ This enables support for dynamic CoreSight replicator link driver.
+ The programmable ATB replicator allows independent filtering of the
+ trace data based on the traceid.
config CORESIGHT_STM
bool "CoreSight System Trace Macrocell driver"
diff --git a/drivers/hwtracing/coresight/Makefile
b/drivers/hwtracing/coresight/Makefile
index 433d590..5bae90ce 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -14,6 +14,6 @@ obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o
coresight-etm-cp14.o \
coresight-etm3x-sysfs.o
obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
coresight-etm4x-sysfs.o
-obj-$(CONFIG_CORESIGHT_QCOM_REPLICATOR) += coresight-replicator-qcom.o
+obj-$(CONFIG_CORESIGHT_DYNAMIC_REPLICATOR) += coresight-dynamic-replicator.o
obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
diff --git a/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
new file mode 100644
index 0000000..1675031
--- /dev/null
+++ b/drivers/hwtracing/coresight/coresight-dynamic-replicator.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2011-2015, 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 <linux/amba/bus.h>
+#include <linux/clk.h>
+#include <linux/coresight.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include "coresight-priv.h"
+
+#define REPLICATOR_IDFILTER0 0x000
+#define REPLICATOR_IDFILTER1 0x004
+
+/**
+ * struct replicator_state - specifics associated to a replicator component
+ * @base: memory mapped base address for this component.
+ * @dev: the device entity associated with this component
+ * @atclk: optional clock for the core parts of the replicator.
+ * @csdev: component vitals needed by the framework
+ */
+struct replicator_state {
+ void __iomem *base;
+ struct device *dev;
+ struct clk *atclk;
+ struct coresight_device *csdev;
+};
+
+static int replicator_enable(struct coresight_device *csdev, int inport,
+ int outport)
+{
+ struct replicator_state *drvdata = dev_get_drvdata(csdev->dev.parent);
+
+ CS_UNLOCK(drvdata->base);
+
+ /*
+ * Ensure that the other port is disabled
+ * 0x00 - passing through the replicator unimpeded
+ * 0xff - disable (or impede) the flow of ATB data
+ */
+ if (outport == 0) {
+ writel_relaxed(0x00, drvdata->base + REPLICATOR_IDFILTER0);
+ writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
+ } else {
+ writel_relaxed(0x00, drvdata->base + REPLICATOR_IDFILTER1);
+ writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
+ }
+
+ CS_LOCK(drvdata->base);
+
+ dev_info(drvdata->dev, "REPLICATOR enabled\n");
+ return 0;
+}
+
+static void replicator_disable(struct coresight_device *csdev, int inport,
+ int outport)
+{
+ struct replicator_state *drvdata = dev_get_drvdata(csdev->dev.parent);
+
+ CS_UNLOCK(drvdata->base);
+
+ /* disable the flow of ATB data through port */
+ if (outport == 0)
+ writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
+ else
+ writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
+
+ CS_LOCK(drvdata->base);
+
+ dev_info(drvdata->dev, "REPLICATOR disabled\n");
+}
+
+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 amba_device *adev, const struct amba_id *id)
+{
+ int ret;
+ struct device *dev = &adev->dev;
+ struct resource *res = &adev->res;
+ struct coresight_platform_data *pdata = NULL;
+ struct replicator_state *drvdata;
+ struct coresight_desc desc = { 0 };
+ struct device_node *np = adev->dev.of_node;
+ void __iomem *base;
+
+ 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;
+ drvdata->atclk = devm_clk_get(&adev->dev, "atclk"); /* optional */
+ if (!IS_ERR(drvdata->atclk)) {
+ ret = clk_prepare_enable(drvdata->atclk);
+ if (ret)
+ return ret;
+ }
+
+ /* 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;
+ dev_set_drvdata(dev, drvdata);
+ pm_runtime_put(&adev->dev);
+
+ desc.type = CORESIGHT_DEV_TYPE_LINK;
+ desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
+ desc.ops = &replicator_cs_ops;
+ desc.pdata = adev->dev.platform_data;
+ desc.dev = &adev->dev;
+ drvdata->csdev = coresight_register(&desc);
+ if (IS_ERR(drvdata->csdev))
+ return PTR_ERR(drvdata->csdev);
+
+ dev_info(dev, "initialized\n");