@@ -12,6 +12,8 @@
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/coresight.h>
#include <linux/amba/bus.h>
@@ -43,7 +45,7 @@ struct funnel_drvdata {
unsigned long priority;
};
-static int funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
+static int dynamic_funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
{
u32 functl;
int rc = 0;
@@ -71,17 +73,19 @@ static int funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
static int funnel_enable(struct coresight_device *csdev, int inport,
int outport)
{
- int rc;
+ int rc = 0;
struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
- rc = funnel_enable_hw(drvdata, inport);
+ if (drvdata->base)
+ rc = dynamic_funnel_enable_hw(drvdata, inport);
if (!rc)
dev_dbg(drvdata->dev, "FUNNEL inport %d enabled\n", inport);
return rc;
}
-static void funnel_disable_hw(struct funnel_drvdata *drvdata, int inport)
+static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata,
+ int inport)
{
u32 functl;
@@ -103,7 +107,8 @@ static void funnel_disable(struct coresight_device *csdev, int inport,
{
struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
- funnel_disable_hw(drvdata, inport);
+ if (drvdata->base)
+ dynamic_funnel_disable_hw(drvdata, inport);
dev_dbg(drvdata->dev, "FUNNEL inport %d disabled\n", inport);
}
@@ -177,54 +182,70 @@ static struct attribute *coresight_funnel_attrs[] = {
};
ATTRIBUTE_GROUPS(coresight_funnel);
-static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
+static int funnel_probe(struct device *dev, struct resource *res)
{
int ret;
void __iomem *base;
- struct device *dev = &adev->dev;
struct coresight_platform_data *pdata = NULL;
struct funnel_drvdata *drvdata;
- struct resource *res = &adev->res;
struct coresight_desc desc = { 0 };
- struct device_node *np = adev->dev.of_node;
+ struct device_node *np = 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;
+ dev->platform_data = pdata;
}
+ if (of_device_is_compatible(np, "arm,coresight-funnel"))
+ pr_warn_once("Uses OBSOLETE CoreSight funnel binding\n");
+
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 */
+ drvdata->dev = dev;
+ drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
if (!IS_ERR(drvdata->atclk)) {
ret = clk_prepare_enable(drvdata->atclk);
if (ret)
return ret;
}
- 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);
+ /*
+ * Map the device base for dynamic-funnel, which has been
+ * validated by AMBA core.
+ */
+ if (res) {
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base)) {
+ ret = PTR_ERR(base);
+ goto out_disable_clk;
+ }
+ drvdata->base = base;
+ desc.groups = coresight_funnel_groups;
+ }
- drvdata->base = base;
- pm_runtime_put(&adev->dev);
+ dev_set_drvdata(dev, drvdata);
desc.type = CORESIGHT_DEV_TYPE_LINK;
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
desc.ops = &funnel_cs_ops;
desc.pdata = pdata;
desc.dev = dev;
- desc.groups = coresight_funnel_groups;
drvdata->csdev = coresight_register(&desc);
+ if (IS_ERR(drvdata->csdev)) {
+ ret = PTR_ERR(drvdata->csdev);
+ goto out_disable_clk;
+ }
+
+ pm_runtime_put(dev);
- return PTR_ERR_OR_ZERO(drvdata->csdev);
+out_disable_clk:
+ if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
+ clk_disable_unprepare(drvdata->atclk);
+ return ret;
}
#ifdef CONFIG_PM
@@ -253,7 +274,48 @@ static const struct dev_pm_ops funnel_dev_pm_ops = {
SET_RUNTIME_PM_OPS(funnel_runtime_suspend, funnel_runtime_resume, NULL)
};
-static const struct amba_id funnel_ids[] = {
+static int static_funnel_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ /* Static funnel do not have programming base */
+ ret = funnel_probe(&pdev->dev, NULL);
+
+ if (ret) {
+ pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ }
+
+ return ret;
+}
+
+static const struct of_device_id static_funnel_match[] = {
+ {.compatible = "arm,coresight-static-funnel"},
+ {}
+};
+
+static struct platform_driver static_funnel_driver = {
+ .probe = static_funnel_probe,
+ .driver = {
+ .name = "coresight-static-funnel",
+ .of_match_table = static_funnel_match,
+ .pm = &funnel_dev_pm_ops,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver(static_funnel_driver);
+
+static int dynamic_funnel_probe(struct amba_device *adev,
+ const struct amba_id *id)
+{
+ return funnel_probe(&adev->dev, &adev->res);
+}
+
+static const struct amba_id dynamic_funnel_ids[] = {
{
.id = 0x000bb908,
.mask = 0x000fffff,
@@ -266,14 +328,14 @@ static const struct amba_id funnel_ids[] = {
{ 0, 0},
};
-static struct amba_driver funnel_driver = {
+static struct amba_driver dynamic_funnel_driver = {
.drv = {
- .name = "coresight-funnel",
+ .name = "coresight-dynamic-funnel",
.owner = THIS_MODULE,
.pm = &funnel_dev_pm_ops,
.suppress_bind_attrs = true,
},
- .probe = funnel_probe,
- .id_table = funnel_ids,
+ .probe = dynamic_funnel_probe,
+ .id_table = dynamic_funnel_ids,
};
-builtin_amba_driver(funnel_driver);
+builtin_amba_driver(dynamic_funnel_driver);