Integration test for tpdm can help to generate the data for
verification of the topology during TPDM software bring up.
Sample:
echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
echo 1 > /sys/bus/coresight/devices/tpdm1/enable_source
echo 1 > /sys/bus/coresight/devices/tpdm1/integration_test
echo 2 > /sys/bus/coresight/devices/tpdm1/integration_test
cat /dev/tmc_etf0 > /data/etf-tpdm1.bin
Signed-off-by: Tao Zhang <quic_taozha@xxxxxxxxxxx>
Signed-off-by: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx>
---
drivers/hwtracing/coresight/Kconfig | 9 ++++
drivers/hwtracing/coresight/coresight-tpdm.c | 54 ++++++++++++++++++++
drivers/hwtracing/coresight/coresight-tpdm.h | 8 +++
3 files changed, 71 insertions(+)
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 5c506a1cd08f..60248fef4089 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -214,4 +214,13 @@ config CORESIGHT_TPDM
To compile this driver as a module, choose M here: the module will be
called coresight-tpdm.
+config CORESIGHT_TPDM_INTEGRATION_TEST
+ bool "Enable CoreSight Integration Test For TPDM"
+ depends on CORESIGHT_TPDM
+ help
+ This option adds support for the CoreSight integration test on this
+ devie. Coresight architecture provides integration control modes of
+ 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.
endif
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index c6480b7389b0..7a2b9097b470 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -136,6 +136,59 @@ static void tpdm_init_default_data(struct tpdm_drvdata *drvdata)
CS_LOCK(drvdata->base);
}
+#ifdef CONFIG_CORESIGHT_TPDM_INTEGRATION_TEST
+static ssize_t integration_test_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t size)
+{
+ int i, ret = 0;
+ unsigned long val;
+ struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+ ret = kstrtoul(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ if (val != 1 && val != 2)
+ return -EINVAL;
+
+ if (!drvdata->enable)
+ return -EINVAL;
+
+ if (val == 1)
+ val = ATBCNTRL_VAL_64;
+ else
+ val = ATBCNTRL_VAL_32;
+ CS_UNLOCK(drvdata->base);
+ writel_relaxed(0x1, drvdata->base + TPDM_ITCNTRL);
+
+ for (i = 1; i < 5; i++)
+ writel_relaxed(val, drvdata->base + TPDM_ITATBCNTRL);
+
+ writel_relaxed(0, drvdata->base + TPDM_ITCNTRL);
+ CS_LOCK(drvdata->base);
+ return size;
+}
+static DEVICE_ATTR_WO(integration_test);
+#endif /* CORESIGHT_TPDM_INTEGRATION_TEST */
+
+static struct attribute *tpdm_attrs[] = {
+#ifdef CONFIG_CORESIGHT_TPDM_INTEGRATION_TEST
+ &dev_attr_integration_test.attr,
+#endif /* CORESIGHT_TPDM_INTEGRATION_TEST */
+ NULL,
+};
+
+static struct attribute_group tpdm_attr_grp = {
+ .attrs = tpdm_attrs,
+};
+
+static const struct attribute_group *tpdm_attr_grps[] = {
+ &tpdm_attr_grp,
+ NULL,
+};
+
static int tpdm_probe(struct amba_device *adev, const struct amba_id *id)
{
struct device *dev = &adev->dev;
@@ -171,6 +224,7 @@ static int tpdm_probe(struct amba_device *adev, const struct amba_id *id)
desc.ops = &tpdm_cs_ops;
desc.pdata = adev->dev.platform_data;
desc.dev = &adev->dev;
+ desc.groups = tpdm_attr_grps;
drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index cb3ddc6c89ae..128fcff37192 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -12,6 +12,14 @@
/* DSB Subunit Registers */
#define TPDM_DSB_CR (0x780)
+/* TPDM integration test registers */
+#define TPDM_ITATBCNTRL (0xEF0)
+#define TPDM_ITCNTRL (0xF00)
+
+/* Register value for integration test */
+#define ATBCNTRL_VAL_32 0xC00F1409
+#define ATBCNTRL_VAL_64 0xC01F1409
+
/**
* This enum is for PERIPHIDR0 register of TPDM.
* The fields [6:0] of PERIPHIDR0 are used to determine what
--
2.17.1
