From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/hwtracing/coresight/coresight-replicator.c | 374 +++++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 334 insertions(+), 40 deletions(-)
diff --git a/kernel/drivers/hwtracing/coresight/coresight-replicator.c b/kernel/drivers/hwtracing/coresight/coresight-replicator.c
index 344e73e..dfff280 100644
--- a/kernel/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/kernel/drivers/hwtracing/coresight/coresight-replicator.c
@@ -1,10 +1,12 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
*
* Description: CoreSight Replicator driver
*/
+#include <linux/acpi.h>
+#include <linux/amba/bus.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/platform_device.h>
@@ -12,41 +14,177 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
+#include <linux/property.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/coresight.h>
#include "coresight-priv.h"
+#define REPLICATOR_IDFILTER0 0x000
+#define REPLICATOR_IDFILTER1 0x004
+
+DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
+
/**
* struct replicator_drvdata - specifics associated to a replicator component
- * @dev: the device entity associated with this component
+ * @base: memory mapped base address for this component. Also indicates
+ * whether this one is programmable or not.
* @atclk: optional clock for the core parts of the replicator.
* @csdev: component vitals needed by the framework
+ * @spinlock: serialize enable/disable operations.
+ * @check_idfilter_val: check if the context is lost upon clock removal.
*/
struct replicator_drvdata {
- struct device *dev;
+ void __iomem *base;
struct clk *atclk;
struct coresight_device *csdev;
+ spinlock_t spinlock;
+ bool check_idfilter_val;
};
+
+static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
+{
+ struct coresight_device *csdev = drvdata->csdev;
+
+ CS_UNLOCK(drvdata->base);
+
+ if (!coresight_claim_device_unlocked(csdev)) {
+ writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
+ writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
+ coresight_disclaim_device_unlocked(csdev);
+ }
+
+ CS_LOCK(drvdata->base);
+}
+
+/*
+ * replicator_reset : Reset the replicator configuration to sane values.
+ */
+static inline void replicator_reset(struct replicator_drvdata *drvdata)
+{
+ if (drvdata->base)
+ dynamic_replicator_reset(drvdata);
+}
+
+static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
+ int inport, int outport)
+{
+ int rc = 0;
+ u32 id0val, id1val;
+ struct coresight_device *csdev = drvdata->csdev;
+
+ CS_UNLOCK(drvdata->base);
+
+ id0val = readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0);
+ id1val = readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1);
+
+ /*
+ * Some replicator designs lose context when AMBA clocks are removed,
+ * so have a check for this.
+ */
+ if (drvdata->check_idfilter_val && id0val == 0x0 && id1val == 0x0)
+ id0val = id1val = 0xff;
+
+ if (id0val == 0xff && id1val == 0xff)
+ rc = coresight_claim_device_unlocked(csdev);
+
+ if (!rc) {
+ switch (outport) {
+ case 0:
+ id0val = 0x0;
+ break;
+ case 1:
+ id1val = 0x0;
+ break;
+ default:
+ WARN_ON(1);
+ rc = -EINVAL;
+ }
+ }
+
+ /* Ensure that the outport is enabled. */
+ if (!rc) {
+ writel_relaxed(id0val, drvdata->base + REPLICATOR_IDFILTER0);
+ writel_relaxed(id1val, drvdata->base + REPLICATOR_IDFILTER1);
+ }
+
+ CS_LOCK(drvdata->base);
+
+ return rc;
+}
static int replicator_enable(struct coresight_device *csdev, int inport,
int outport)
{
+ int rc = 0;
struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
+ unsigned long flags;
+ bool first_enable = false;
- if (atomic_inc_return(&csdev->refcnt[outport]) == 1)
- dev_dbg(drvdata->dev, "REPLICATOR enabled\n");
- return 0;
+ spin_lock_irqsave(&drvdata->spinlock, flags);
+ if (atomic_read(&csdev->refcnt[outport]) == 0) {
+ if (drvdata->base)
+ rc = dynamic_replicator_enable(drvdata, inport,
+ outport);
+ if (!rc)
+ first_enable = true;
+ }
+ if (!rc)
+ atomic_inc(&csdev->refcnt[outport]);
+ spin_unlock_irqrestore(&drvdata->spinlock, flags);
+
+ if (first_enable)
+ dev_dbg(&csdev->dev, "REPLICATOR enabled\n");
+ return rc;
+}
+
+static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
+ int inport, int outport)
+{
+ u32 reg;
+ struct coresight_device *csdev = drvdata->csdev;
+
+ switch (outport) {
+ case 0:
+ reg = REPLICATOR_IDFILTER0;
+ break;
+ case 1:
+ reg = REPLICATOR_IDFILTER1;
+ break;
+ default:
+ WARN_ON(1);
+ return;
+ }
+
+ CS_UNLOCK(drvdata->base);
+
+ /* disable the flow of ATB data through port */
+ writel_relaxed(0xff, drvdata->base + reg);
+
+ if ((readl_relaxed(drvdata->base + REPLICATOR_IDFILTER0) == 0xff) &&
+ (readl_relaxed(drvdata->base + REPLICATOR_IDFILTER1) == 0xff))
+ coresight_disclaim_device_unlocked(csdev);
+ CS_LOCK(drvdata->base);
}
static void replicator_disable(struct coresight_device *csdev, int inport,
int outport)
{
struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
+ unsigned long flags;
+ bool last_disable = false;
- if (atomic_dec_return(&csdev->refcnt[outport]) == 0)
- dev_dbg(drvdata->dev, "REPLICATOR disabled\n");
+ spin_lock_irqsave(&drvdata->spinlock, flags);
+ if (atomic_dec_return(&csdev->refcnt[outport]) == 0) {
+ if (drvdata->base)
+ dynamic_replicator_disable(drvdata, inport, outport);
+ last_disable = true;
+ }
+ spin_unlock_irqrestore(&drvdata->spinlock, flags);
+
+ if (last_disable)
+ dev_dbg(&csdev->dev, "REPLICATOR disabled\n");
}
static const struct coresight_ops_link replicator_link_ops = {
@@ -58,60 +196,138 @@
.link_ops = &replicator_link_ops,
};
-static int replicator_probe(struct platform_device *pdev)
+#define coresight_replicator_reg(name, offset) \
+ coresight_simple_reg32(struct replicator_drvdata, name, offset)
+
+coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
+coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
+
+static struct attribute *replicator_mgmt_attrs[] = {
+ &dev_attr_idfilter0.attr,
+ &dev_attr_idfilter1.attr,
+ NULL,
+};
+
+static const struct attribute_group replicator_mgmt_group = {
+ .attrs = replicator_mgmt_attrs,
+ .name = "mgmt",
+};
+
+static const struct attribute_group *replicator_groups[] = {
+ &replicator_mgmt_group,
+ NULL,
+};
+
+static int replicator_probe(struct device *dev, struct resource *res)
{
- int ret;
- struct device *dev = &pdev->dev;
+ int ret = 0;
struct coresight_platform_data *pdata = NULL;
struct replicator_drvdata *drvdata;
struct coresight_desc desc = { 0 };
- struct device_node *np = pdev->dev.of_node;
+ void __iomem *base;
- if (np) {
- pdata = of_get_coresight_platform_data(dev, np);
- if (IS_ERR(pdata))
- return PTR_ERR(pdata);
- pdev->dev.platform_data = pdata;
- }
+ if (is_of_node(dev_fwnode(dev)) &&
+ of_device_is_compatible(dev->of_node, "arm,coresight-replicator"))
+ dev_warn_once(dev,
+ "Uses OBSOLETE CoreSight replicator binding\n");
+
+ desc.name = coresight_alloc_device_name(&replicator_devs, dev);
+ if (!desc.name)
+ return -ENOMEM;
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
- drvdata->dev = &pdev->dev;
- drvdata->atclk = devm_clk_get(&pdev->dev, "atclk"); /* optional */
+ drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
if (!IS_ERR(drvdata->atclk)) {
ret = clk_prepare_enable(drvdata->atclk);
if (ret)
return ret;
}
- pm_runtime_get_noresume(&pdev->dev);
- pm_runtime_set_active(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
- platform_set_drvdata(pdev, drvdata);
+ /*
+ * Map the device base for dynamic-replicator, 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 = replicator_groups;
+ desc.access = CSDEV_ACCESS_IOMEM(base);
+ }
+
+ if (fwnode_property_present(dev_fwnode(dev),
+ "qcom,replicator-loses-context"))
+ drvdata->check_idfilter_val = true;
+
+ dev_set_drvdata(dev, drvdata);
+
+ pdata = coresight_get_platform_data(dev);
+ if (IS_ERR(pdata)) {
+ ret = PTR_ERR(pdata);
+ goto out_disable_clk;
+ }
+ dev->platform_data = pdata;
+
+ spin_lock_init(&drvdata->spinlock);
desc.type = CORESIGHT_DEV_TYPE_LINK;
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
desc.ops = &replicator_cs_ops;
- desc.pdata = pdev->dev.platform_data;
- desc.dev = &pdev->dev;
+ desc.pdata = dev->platform_data;
+ desc.dev = dev;
+
drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);
- goto out_disable_pm;
+ goto out_disable_clk;
}
- pm_runtime_put(&pdev->dev);
+ replicator_reset(drvdata);
+ pm_runtime_put(dev);
- return 0;
-
-out_disable_pm:
- if (!IS_ERR(drvdata->atclk))
+out_disable_clk:
+ if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
clk_disable_unprepare(drvdata->atclk);
- pm_runtime_put_noidle(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static int replicator_remove(struct device *dev)
+{
+ struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
+
+ coresight_unregister(drvdata->csdev);
+ return 0;
+}
+
+static int static_replicator_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 replicators do not have programming base */
+ ret = replicator_probe(&pdev->dev, NULL);
+
+ if (ret) {
+ pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ }
return ret;
+}
+
+static int static_replicator_remove(struct platform_device *pdev)
+{
+ replicator_remove(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ return 0;
}
#ifdef CONFIG_PM
@@ -141,18 +357,96 @@
replicator_runtime_resume, NULL)
};
-static const struct of_device_id replicator_match[] = {
+static const struct of_device_id static_replicator_match[] = {
{.compatible = "arm,coresight-replicator"},
+ {.compatible = "arm,coresight-static-replicator"},
{}
};
-static struct platform_driver replicator_driver = {
- .probe = replicator_probe,
+MODULE_DEVICE_TABLE(of, static_replicator_match);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id static_replicator_acpi_ids[] = {
+ {"ARMHC985", 0}, /* ARM CoreSight Static Replicator */
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids);
+#endif
+
+static struct platform_driver static_replicator_driver = {
+ .probe = static_replicator_probe,
+ .remove = static_replicator_remove,
.driver = {
- .name = "coresight-replicator",
- .of_match_table = replicator_match,
+ .name = "coresight-static-replicator",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(static_replicator_match),
+ .acpi_match_table = ACPI_PTR(static_replicator_acpi_ids),
.pm = &replicator_dev_pm_ops,
.suppress_bind_attrs = true,
},
};
-builtin_platform_driver(replicator_driver);
+
+static int dynamic_replicator_probe(struct amba_device *adev,
+ const struct amba_id *id)
+{
+ return replicator_probe(&adev->dev, &adev->res);
+}
+
+static void dynamic_replicator_remove(struct amba_device *adev)
+{
+ replicator_remove(&adev->dev);
+}
+
+static const struct amba_id dynamic_replicator_ids[] = {
+ CS_AMBA_ID(0x000bb909),
+ CS_AMBA_ID(0x000bb9ec), /* Coresight SoC-600 */
+ {},
+};
+
+MODULE_DEVICE_TABLE(amba, dynamic_replicator_ids);
+
+static struct amba_driver dynamic_replicator_driver = {
+ .drv = {
+ .name = "coresight-dynamic-replicator",
+ .pm = &replicator_dev_pm_ops,
+ .owner = THIS_MODULE,
+ .suppress_bind_attrs = true,
+ },
+ .probe = dynamic_replicator_probe,
+ .remove = dynamic_replicator_remove,
+ .id_table = dynamic_replicator_ids,
+};
+
+static int __init replicator_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&static_replicator_driver);
+ if (ret) {
+ pr_info("Error registering platform driver\n");
+ return ret;
+ }
+
+ ret = amba_driver_register(&dynamic_replicator_driver);
+ if (ret) {
+ pr_info("Error registering amba driver\n");
+ platform_driver_unregister(&static_replicator_driver);
+ }
+
+ return ret;
+}
+
+static void __exit replicator_exit(void)
+{
+ platform_driver_unregister(&static_replicator_driver);
+ amba_driver_unregister(&dynamic_replicator_driver);
+}
+
+module_init(replicator_init);
+module_exit(replicator_exit);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
+MODULE_LICENSE("GPL v2");
--
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