Release 4.14 drivers/hwtracing/coresight/coresight-funnel.c
/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
*
* Description: CoreSight Funnel driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/coresight.h>
#include <linux/amba/bus.h>
#include <linux/clk.h>
#include "coresight-priv.h"
#define FUNNEL_FUNCTL 0x000
#define FUNNEL_PRICTL 0x004
#define FUNNEL_HOLDTIME_MASK 0xf00
#define FUNNEL_HOLDTIME_SHFT 0x8
#define FUNNEL_HOLDTIME (0x7 << FUNNEL_HOLDTIME_SHFT)
/**
* struct funnel_drvdata - specifics associated to a funnel component
* @base: memory mapped base address for this component.
* @dev: the device entity associated to this component.
* @atclk: optional clock for the core parts of the funnel.
* @csdev: component vitals needed by the framework.
* @priority: port selection order.
*/
struct funnel_drvdata {
void __iomem *base;
struct device *dev;
struct clk *atclk;
struct coresight_device *csdev;
unsigned long priority;
};
static void funnel_enable_hw(struct funnel_drvdata *drvdata, int port)
{
u32 functl;
CS_UNLOCK(drvdata->base);
functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
functl &= ~FUNNEL_HOLDTIME_MASK;
functl |= FUNNEL_HOLDTIME;
functl |= (1 << port);
writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
writel_relaxed(drvdata->priority, drvdata->base + FUNNEL_PRICTL);
CS_LOCK(drvdata->base);
}
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static int funnel_enable(struct coresight_device *csdev, int inport,
int outport)
{
struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
funnel_enable_hw(drvdata, inport);
dev_info(drvdata->dev, "FUNNEL inport %d enabled\n", inport);
return 0;
}
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static void funnel_disable_hw(struct funnel_drvdata *drvdata, int inport)
{
u32 functl;
CS_UNLOCK(drvdata->base);
functl = readl_relaxed(drvdata->base + FUNNEL_FUNCTL);
functl &= ~(1 << inport);
writel_relaxed(functl, drvdata->base + FUNNEL_FUNCTL);
CS_LOCK(drvdata->base);
}
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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);
}
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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);
}
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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;
}
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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;
}
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| Pratik Patel | 42 | 100.00% | 1 | 100.00% |
| Total | 42 | 100.00% | 1 | 100.00% |
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);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Pratik Patel | 62 | 93.94% | 1 | 50.00% |
| Linus Walleij | 4 | 6.06% | 1 | 50.00% |
| Total | 66 | 100.00% | 2 | 100.00% |
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);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);
return 0;
}
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| Suzuki K. Poulose | 11 | 3.65% | 1 | 25.00% |
| Total | 301 | 100.00% | 4 | 100.00% |
#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;
}
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| Linus Walleij | 43 | 100.00% | 1 | 100.00% |
| Total | 43 | 100.00% | 1 | 100.00% |
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;
}
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| Linus Walleij | 43 | 100.00% | 1 | 100.00% |
| Total | 43 | 100.00% | 1 | 100.00% |
#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 = 0x0003b908,
.mask = 0x0003ffff,
},
{
/* 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);
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| Pratik Patel | 918 | 81.31% | 1 | 12.50% |
| Linus Walleij | 179 | 15.85% | 2 | 25.00% |
| Suzuki K. Poulose | 24 | 2.13% | 2 | 25.00% |
| Mathieu J. Poirier | 5 | 0.44% | 1 | 12.50% |
| Paul Gortmaker | 2 | 0.18% | 1 | 12.50% |
| Arvind Yadav | 1 | 0.09% | 1 | 12.50% |
| Wei Yongjun | | 0.00% | 0 | 0.00% |
| Total | 1129 | 100.00% | 8 | 100.00% |
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