TPDA(Trace, Profiling and Diagnostics Aggregator) is
to provide packetization, funneling and timestamping of
TPDM data. Multiple monitors are connected to different
input ports of TPDA.This change is to add tpda
enable/disable/probe functions for coresight tpda driver.
- - - - - - - - - - - -
| TPDM 0| | TPDM 1 | | TPDM 2|
- - - - - - - - - - - -
| | |
|_ _ _ _ _ _ | _ _ _ _ |
| | |
| | |
------------------
| TPDA |
------------------
|
|
------------------
| Trace Funnel |
------------------
Signed-off-by: Tao Zhang <quic_taozha@xxxxxxxxxxx>
Signed-off-by: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx>
---
MAINTAINERS | 1 +
drivers/hwtracing/coresight/Kconfig | 11 +
drivers/hwtracing/coresight/Makefile | 1 +
drivers/hwtracing/coresight/coresight-tpda.c | 201 +++++++++++++++++++
drivers/hwtracing/coresight/coresight-tpda.h | 33 +++
5 files changed, 247 insertions(+)
create mode 100644 drivers/hwtracing/coresight/coresight-tpda.c
create mode 100644 drivers/hwtracing/coresight/coresight-tpda.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 7e2898f1550b..12e4e56a252c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15568,6 +15568,7 @@ M: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
S: Maintained
F: Documentation/ABI/testing/sysfs-bus-coresight-devices-tpdm
F: Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
+F: drivers/hwtracing/coresight/coresight-tpda.c
F: drivers/hwtracing/coresight/coresight-tpdm.c
QEMU MACHINE EMULATOR AND VIRTUALIZER SUPPORT
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 60248fef4089..317c5e7f4819 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -223,4 +223,15 @@ config CORESIGHT_TPDM_INTEGRATION_TEST
operation to facilitate integration testing and software bringup
and/or to instrument topology discovery. The TPDM utilizes integration
mode to accomplish integration testing and software bringup.
+
+config CORESIGHT_TPDA
+ tristate "CoreSight Trace, Profiling & Diagnostics Aggregator driver"
+ help
+ This driver provides support for configuring aggregator. This is
+ primarily useful for pulling the data sets from one or more
+ attached monitors and pushing the resultant data out. Multiple
+ monitors are connected on different input ports of TPDA.
+
+ To compile this driver as a module, choose M here: the module will be
+ called coresight-tpda.
endif
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index e7392a0dddeb..cd8079ec276d 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -26,5 +26,6 @@ obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o
obj-$(CONFIG_CORESIGHT_TRBE) += coresight-trbe.o
obj-$(CONFIG_CORESIGHT_TPDM) += coresight-tpdm.o
+obj-$(CONFIG_CORESIGHT_TPDA) += coresight-tpda.o
coresight-cti-y := coresight-cti-core.o coresight-cti-platform.o \
coresight-cti-sysfs.o
diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c
new file mode 100644
index 000000000000..e51624fac567
--- /dev/null
+++ b/drivers/hwtracing/coresight/coresight-tpda.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/amba/bus.h>
+#include <linux/bitmap.h>
+#include <linux/coresight.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include "coresight-priv.h"
+#include "coresight-tpda.h"
+
+DEFINE_CORESIGHT_DEVLIST(tpda_devs, "tpda");
+
+/* Settings pre enabling port control register */
+static void tpda_enable_pre_port(struct tpda_drvdata *drvdata)
+{
+ u32 val;
+
+ val = readl_relaxed(drvdata->base + TPDA_CR);
+ val |= (drvdata->atid << 6);
+ writel_relaxed(val, drvdata->base + TPDA_CR);
+}
+
+static void tpda_enable_port(struct tpda_drvdata *drvdata, int port)
+{
+ u32 val;
+
+ val = readl_relaxed(drvdata->base + TPDA_Pn_CR(port));
+ /* Enable the port */
+ val = val | BIT(0);
+ writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port));
+}
+
+/* Settings post enabling port control register */
+static void tpda_enable_post_port(struct tpda_drvdata *drvdata)
+{
+ u32 val;
+
+ val = readl_relaxed(drvdata->base + TPDA_SYNCR);
+ /* Clear the mode */
+ val = val & ~BIT(12);
+ /* Program the counter value */
+ val = val | 0xFFF;
+ writel_relaxed(val, drvdata->base + TPDA_SYNCR);
+}
+
+static void _tpda_enable(struct tpda_drvdata *drvdata, int port)
+{
+ CS_UNLOCK(drvdata->base);
+
+ if (!drvdata->enable)
+ tpda_enable_pre_port(drvdata);
+
+ tpda_enable_port(drvdata, port);
+
+ if (!drvdata->enable)
+ tpda_enable_post_port(drvdata);
+
+ CS_LOCK(drvdata->base);
+}
+
+static int tpda_enable(struct coresight_device *csdev, int inport, int outport)
+{
+ struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
+
+ mutex_lock(&drvdata->lock);
+ _tpda_enable(drvdata, inport);
+ drvdata->enable = true;
+ mutex_unlock(&drvdata->lock);
+
+ dev_info(drvdata->dev, "TPDA inport %d enabled\n", inport);
+ return 0;
+}
+
+static void _tpda_disable(struct tpda_drvdata *drvdata, int port)
+{
+ u32 val;
+
+ CS_UNLOCK(drvdata->base);
+
+ val = readl_relaxed(drvdata->base + TPDA_Pn_CR(port));
+ val = val & ~BIT(0);
+ writel_relaxed(val, drvdata->base + TPDA_Pn_CR(port));
+
+ CS_LOCK(drvdata->base);
+}
+
+static void tpda_disable(struct coresight_device *csdev, int inport,
+ int outport)
+{
+ struct tpda_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
+
+ mutex_lock(&drvdata->lock);
+ _tpda_disable(drvdata, inport);
+ drvdata->enable = false;
+ mutex_unlock(&drvdata->lock);
+
+ dev_info(drvdata->dev, "TPDA inport %d disabled\n", inport);
+}
+
+static const struct coresight_ops_link tpda_link_ops = {
+ .enable = tpda_enable,
+ .disable = tpda_disable,
+};
+
+static const struct coresight_ops tpda_cs_ops = {
+ .link_ops = &tpda_link_ops,
+};
+
+static int tpda_parse_of_data(struct tpda_drvdata *drvdata)
+{
+ int ret;
+ struct device_node *node = drvdata->dev->of_node;
+
+ ret = of_property_read_u32(node, "qcom,tpda-atid", &drvdata->atid);
+ if (ret) {
+ dev_err(drvdata->dev, "TPDA ATID is not specified\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int tpda_probe(struct amba_device *adev, const struct amba_id *id)
+{
+ int ret;
+ struct device *dev = &adev->dev;
+ struct coresight_platform_data *pdata;
+ struct tpda_drvdata *drvdata;
+ struct coresight_desc desc = { 0 };
+
+ desc.name = coresight_alloc_device_name(&tpda_devs, dev);
+ if (!desc.name)
+ return -ENOMEM;
+ pdata = coresight_get_platform_data(dev);
+ 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);
+
+ drvdata->base = devm_ioremap_resource(dev, &adev->res);
+ if (!drvdata->base)
+ return -ENOMEM;
+
+ mutex_init(&drvdata->lock);
+
+ ret = tpda_parse_of_data(drvdata);
+ if (ret)
+ return ret;
+
+ desc.type = CORESIGHT_DEV_TYPE_LINK;
+ desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
+ desc.ops = &tpda_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);
+
+ pm_runtime_put(&adev->dev);
+
+ dev_dbg(drvdata->dev, "TPDA initialized\n");
+ return 0;
+}
+
+static struct amba_id tpda_ids[] = {
+ {
+ .id = 0x000f0f00,
+ .mask = 0x000fff00,
+ },
+ { 0, 0},
+};
+
+static struct amba_driver tpda_driver = {
+ .drv = {
+ .name = "coresight-tpda",
+ .owner = THIS_MODULE,
+ .suppress_bind_attrs = true,
+ },
+ .probe = tpda_probe,
+ .id_table = tpda_ids,
+};
+
+module_amba_driver(tpda_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Trace, Profiling & Diagnostic Aggregator driver");
diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/coresight/coresight-tpda.h
new file mode 100644
index 000000000000..35723571ea13
--- /dev/null
+++ b/drivers/hwtracing/coresight/coresight-tpda.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _CORESIGHT_CORESIGHT_TPDA_H
+#define _CORESIGHT_CORESIGHT_TPDA_H
+
+#define TPDA_CR (0x000)
+#define TPDA_Pn_CR(n) (0x004 + (n * 4))
+#define TPDA_SYNCR (0x08C)
+
+#define TPDA_MAX_INPORTS 32
+
+/**
+ * struct tpda_drvdata - specifics associated to an TPDA component
+ * @base: memory mapped base address for this component.
+ * @dev: The device entity associated to this component.
+ * @csdev: component vitals needed by the framework.
+ * @lock: lock for the enable value.
+ * @enable: enable status of the component.
+ * @traceid: trace source identification for the data packet by TPDA.
+ */
+struct tpda_drvdata {
+ void __iomem *base;
+ struct device *dev;
+ struct coresight_device *csdev;
+ struct mutex lock;
+ bool enable;
+ u32 atid;
+};
+
+#endif /* _CORESIGHT_CORESIGHT_TPDA_H */
--
2.17.1
