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/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* 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/clk.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/of_coresight.h>
#include <linux/coresight.h>
#include <linux/memory_alloc.h>
#include <linux/io.h>
#include <linux/of.h>
#include "kgsl.h"
#include "kgsl_device.h"
#include "adreno.h"
struct coresight_attr {
struct device_attribute attr;
int regname;
};
#define CORESIGHT_CREATE_REG_ATTR(_attrname, _regname) \
struct coresight_attr coresight_attr_##_attrname = \
{ __ATTR(_attrname, S_IRUGO | S_IWUSR, gfx_show_reg, gfx_store_reg),\
_regname}
/**
* adreno_coresight_enable() - Generic function to enable coresight debugging
* @csdev: Pointer to coresight's device struct
*
* This is a generic function to enable coresight debug bus on adreno
* devices. This should be used in all cases of enabling
* coresight debug bus for adreno devices. This function in turn calls
* the adreno device specific function through gpudev hook.
* This function is registered as the coresight enable function
* with coresight driver. It should only be called through coresight driver
* as that would ensure that the necessary setup required to be done
* on coresight driver's part is also done.
*/
int adreno_coresight_enable(struct coresight_device *csdev)
{
struct kgsl_device *device = dev_get_drvdata(csdev->dev.parent);
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
/* Check if coresight compatible device, return error otherwise */
if (adreno_dev->gpudev->coresight_enable)
return adreno_dev->gpudev->coresight_enable(device);
else
return -ENODEV;
}
/**
* adreno_coresight_disable() - Generic function to disable coresight debugging
* @csdev: Pointer to coresight's device struct
*
* This is a generic function to disable coresight debug bus on adreno
* devices. This should be used in all cases of disabling
* coresight debug bus for adreno devices. This function in turn calls
* the adreno device specific function through the gpudev hook.
* This function is registered as the coresight disable function
* with coresight driver. It should only be called through coresight driver
* as that would ensure that the necessary setup required to be done on
* coresight driver's part is also done.
*/
void adreno_coresight_disable(struct coresight_device *csdev)
{
struct kgsl_device *device = dev_get_drvdata(csdev->dev.parent);
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
/* Check if coresight compatible device, bail otherwise */
if (adreno_dev->gpudev->coresight_disable)
return adreno_dev->gpudev->coresight_disable(device);
}
static const struct coresight_ops_source adreno_coresight_ops_source = {
.enable = adreno_coresight_enable,
.disable = adreno_coresight_disable,
};
static const struct coresight_ops adreno_coresight_cs_ops = {
.source_ops = &adreno_coresight_ops_source,
};
void adreno_coresight_remove(struct platform_device *pdev)
{
struct kgsl_device_platform_data *pdata = pdev->dev.platform_data;
coresight_unregister(pdata->csdev);
}
static ssize_t coresight_read_reg(struct kgsl_device *device,
unsigned int offset, char *buf)
{
unsigned int regval = 0;
mutex_lock(&device->mutex);
if (!kgsl_active_count_get(device)) {
kgsl_regread(device, offset, ®val);
kgsl_active_count_put(device);
}
mutex_unlock(&device->mutex);
return snprintf(buf, PAGE_SIZE, "0x%X", regval);
}
static inline unsigned int coresight_convert_reg(const char *buf)
{
long regval = 0;
int rv = 0;
rv = kstrtoul(buf, 16, ®val);
if (!rv)
return (unsigned int)regval;
else
return rv;
}
static ssize_t gfx_show_reg(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct kgsl_device *device = dev_get_drvdata(dev->parent);
struct coresight_attr *csight_attr = container_of(attr,
struct coresight_attr, attr);
return coresight_read_reg(device, csight_attr->regname, buf);
}
static ssize_t gfx_store_reg(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct kgsl_device *device = dev_get_drvdata(dev->parent);
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct coresight_attr *csight_attr = container_of(attr,
struct coresight_attr, attr);
unsigned int regval = 0;
regval = coresight_convert_reg(buf);
if (adreno_dev->gpudev->coresight_config_debug_reg)
adreno_dev->gpudev->coresight_config_debug_reg(device,
csight_attr->regname, regval);
return size;
}
CORESIGHT_CREATE_REG_ATTR(config_debug_bus, DEBUG_BUS_CTL);
CORESIGHT_CREATE_REG_ATTR(config_trace_stop_cnt, TRACE_STOP_CNT);
CORESIGHT_CREATE_REG_ATTR(config_trace_start_cnt, TRACE_START_CNT);
CORESIGHT_CREATE_REG_ATTR(config_trace_period_cnt, TRACE_PERIOD_CNT);
CORESIGHT_CREATE_REG_ATTR(config_trace_cmd, TRACE_CMD);
CORESIGHT_CREATE_REG_ATTR(config_trace_bus_ctl, TRACE_BUS_CTL);
static struct attribute *gfx_attrs[] = {
&coresight_attr_config_debug_bus.attr.attr,
&coresight_attr_config_trace_start_cnt.attr.attr,
&coresight_attr_config_trace_stop_cnt.attr.attr,
&coresight_attr_config_trace_period_cnt.attr.attr,
&coresight_attr_config_trace_cmd.attr.attr,
&coresight_attr_config_trace_bus_ctl.attr.attr,
NULL,
};
static struct attribute_group gfx_attr_grp = {
.attrs = gfx_attrs,
};
static const struct attribute_group *gfx_attr_grps[] = {
&gfx_attr_grp,
NULL,
};
int adreno_coresight_init(struct platform_device *pdev)
{
int ret = 0;
struct kgsl_device_platform_data *pdata = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct coresight_desc *desc;
if (IS_ERR_OR_NULL(pdata->coresight_pdata))
return -ENODATA;
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;
desc->type = CORESIGHT_DEV_TYPE_SOURCE;
desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_BUS;
desc->ops = &adreno_coresight_cs_ops;
desc->pdata = pdata->coresight_pdata;
desc->dev = &pdev->dev;
desc->owner = THIS_MODULE;
desc->groups = gfx_attr_grps;
pdata->csdev = coresight_register(desc);
if (IS_ERR(pdata->csdev)) {
ret = PTR_ERR(pdata->csdev);
goto err;
}
return 0;
err:
devm_kfree(dev, desc);
return ret;
}
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