drivers/hwtracing/coresight/coresight-funnel.c


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generated by cgit v1.2.3 (git 2.25.1) at 2024-09-07 07:04:00 +0000
 

pan>->base);
}

static void funnel_disable(struct coresight_device *csdev, int inport,
			   int outport)
{
	struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);

	funnel_disable_hw(drvdata, inport);

	dev_info(drvdata->dev, "FUNNEL inport %d disabled\n", inport);
}

static const struct coresight_ops_link funnel_link_ops = {
	.enable		= funnel_enable,
	.disable	= funnel_disable,
};

static const struct coresight_ops funnel_cs_ops = {
	.link_ops	= &funnel_link_ops,
};

static ssize_t priority_show(struct device *dev,
			     struct device_attribute *attr, char *buf)
{
	struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
	unsigned long val = drvdata->priority;

	return sprintf(buf, "%#lx\n", val);
}

static ssize_t priority_store(struct device *dev,
			      struct device_attribute *attr,
			      const char *buf, size_t size)
{
	int ret;
	unsigned long val;
	struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);

	ret = kstrtoul(buf, 16, &val);
	if (ret)
		return ret;

	drvdata->priority = val;
	return size;
}
static DEVICE_ATTR_RW(priority);

static u32 get_funnel_ctrl_hw(struct funnel_drvdata *drvdata)
{
	u32 functl;

	CS_UNLOCK(drvdata->base);
	functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
	CS_LOCK(drvdata->base);

	return functl;
}

static ssize_t funnel_ctrl_show(struct device *dev,
			     struct device_attribute *attr, char *buf)
{
	u32 val;
	struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);

	pm_runtime_get_sync(drvdata->dev);

	val = get_funnel_ctrl_hw(drvdata);

	pm_runtime_put(drvdata->dev);

	return sprintf(buf, "%#x\n", val);
}
static DEVICE_ATTR_RO(funnel_ctrl);

static struct attribute *coresight_funnel_attrs[] = {
	&dev_attr_funnel_ctrl.attr,
	&dev_attr_priority.attr,
	NULL,
};
ATTRIBUTE_GROUPS(coresight_funnel);

static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
{
	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;

	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;
	}
	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);

	drvdata->base = base;
	pm_runtime_put(&adev->dev);

	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);

	return PTR_ERR_OR_ZERO(drvdata->csdev);
}

#ifdef CONFIG_PM
static int funnel_runtime_suspend(struct device *dev)
{
	struct funnel_drvdata *drvdata = dev_get_drvdata(dev);

	if (drvdata && !IS_ERR(drvdata->atclk))
		clk_disable_unprepare(drvdata->atclk);

	return 0;
}

static int funnel_runtime_resume(struct device *dev)
{
	struct funnel_drvdata *drvdata = dev_get_drvdata(dev);

	if (drvdata && !IS_ERR(drvdata->atclk))
		clk_prepare_enable(drvdata->atclk);

	return 0;
}
#endif

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[] = {
	{
		.id     = 0x000bb908,
		.mask   = 0x000fffff,
	},
	{
		/* Coresight SoC-600 */
		.id     = 0x000bb9eb,
		.mask   = 0x000fffff,
	},
	{ 0, 0},
};

static struct amba_driver funnel_driver = {
	.drv = {
		.name	= "coresight-funnel",
		.owner	= THIS_MODULE,
		.pm	= &funnel_dev_pm_ops,
		.suppress_bind_attrs = true,
	},
	.probe		= funnel_probe,
	.id_table	= funnel_ids,
};
builtin_amba_driver(funnel_driver);