mirror of https://gitee.com/openkylin/linux.git
236 lines
5.6 KiB
C
236 lines
5.6 KiB
C
/* Copyright (c) 2011-2012, 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/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/err.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 TPIU_SUPP_PORTSZ 0x000
|
|
#define TPIU_CURR_PORTSZ 0x004
|
|
#define TPIU_SUPP_TRIGMODES 0x100
|
|
#define TPIU_TRIG_CNTRVAL 0x104
|
|
#define TPIU_TRIG_MULT 0x108
|
|
#define TPIU_SUPP_TESTPATM 0x200
|
|
#define TPIU_CURR_TESTPATM 0x204
|
|
#define TPIU_TEST_PATREPCNTR 0x208
|
|
#define TPIU_FFSR 0x300
|
|
#define TPIU_FFCR 0x304
|
|
#define TPIU_FSYNC_CNTR 0x308
|
|
#define TPIU_EXTCTL_INPORT 0x400
|
|
#define TPIU_EXTCTL_OUTPORT 0x404
|
|
#define TPIU_ITTRFLINACK 0xee4
|
|
#define TPIU_ITTRFLIN 0xee8
|
|
#define TPIU_ITATBDATA0 0xeec
|
|
#define TPIU_ITATBCTR2 0xef0
|
|
#define TPIU_ITATBCTR1 0xef4
|
|
#define TPIU_ITATBCTR0 0xef8
|
|
|
|
/** register definition **/
|
|
/* FFCR - 0x304 */
|
|
#define FFCR_FON_MAN BIT(6)
|
|
|
|
/**
|
|
* @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 TPIU.
|
|
* @csdev: component vitals needed by the framework.
|
|
*/
|
|
struct tpiu_drvdata {
|
|
void __iomem *base;
|
|
struct device *dev;
|
|
struct clk *atclk;
|
|
struct coresight_device *csdev;
|
|
};
|
|
|
|
static void tpiu_enable_hw(struct tpiu_drvdata *drvdata)
|
|
{
|
|
CS_UNLOCK(drvdata->base);
|
|
|
|
/* TODO: fill this up */
|
|
|
|
CS_LOCK(drvdata->base);
|
|
}
|
|
|
|
static int tpiu_enable(struct coresight_device *csdev)
|
|
{
|
|
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
|
|
|
|
pm_runtime_get_sync(csdev->dev.parent);
|
|
tpiu_enable_hw(drvdata);
|
|
|
|
dev_info(drvdata->dev, "TPIU enabled\n");
|
|
return 0;
|
|
}
|
|
|
|
static void tpiu_disable_hw(struct tpiu_drvdata *drvdata)
|
|
{
|
|
CS_UNLOCK(drvdata->base);
|
|
|
|
/* Clear formatter controle reg. */
|
|
writel_relaxed(0x0, drvdata->base + TPIU_FFCR);
|
|
/* Generate manual flush */
|
|
writel_relaxed(FFCR_FON_MAN, drvdata->base + TPIU_FFCR);
|
|
|
|
CS_LOCK(drvdata->base);
|
|
}
|
|
|
|
static void tpiu_disable(struct coresight_device *csdev)
|
|
{
|
|
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
|
|
|
|
tpiu_disable_hw(drvdata);
|
|
pm_runtime_put(csdev->dev.parent);
|
|
|
|
dev_info(drvdata->dev, "TPIU disabled\n");
|
|
}
|
|
|
|
static const struct coresight_ops_sink tpiu_sink_ops = {
|
|
.enable = tpiu_enable,
|
|
.disable = tpiu_disable,
|
|
};
|
|
|
|
static const struct coresight_ops tpiu_cs_ops = {
|
|
.sink_ops = &tpiu_sink_ops,
|
|
};
|
|
|
|
static int tpiu_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 tpiu_drvdata *drvdata;
|
|
struct resource *res = &adev->res;
|
|
struct coresight_desc *desc;
|
|
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;
|
|
|
|
/* Disable tpiu to support older devices */
|
|
tpiu_disable_hw(drvdata);
|
|
|
|
pm_runtime_put(&adev->dev);
|
|
|
|
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
|
|
if (!desc)
|
|
return -ENOMEM;
|
|
|
|
desc->type = CORESIGHT_DEV_TYPE_SINK;
|
|
desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PORT;
|
|
desc->ops = &tpiu_cs_ops;
|
|
desc->pdata = pdata;
|
|
desc->dev = dev;
|
|
drvdata->csdev = coresight_register(desc);
|
|
if (IS_ERR(drvdata->csdev))
|
|
return PTR_ERR(drvdata->csdev);
|
|
|
|
dev_info(dev, "TPIU initialized\n");
|
|
return 0;
|
|
}
|
|
|
|
static int tpiu_remove(struct amba_device *adev)
|
|
{
|
|
struct tpiu_drvdata *drvdata = amba_get_drvdata(adev);
|
|
|
|
coresight_unregister(drvdata->csdev);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int tpiu_runtime_suspend(struct device *dev)
|
|
{
|
|
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
if (drvdata && !IS_ERR(drvdata->atclk))
|
|
clk_disable_unprepare(drvdata->atclk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tpiu_runtime_resume(struct device *dev)
|
|
{
|
|
struct tpiu_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 tpiu_dev_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(tpiu_runtime_suspend, tpiu_runtime_resume, NULL)
|
|
};
|
|
|
|
static struct amba_id tpiu_ids[] = {
|
|
{
|
|
.id = 0x0003b912,
|
|
.mask = 0x0003ffff,
|
|
},
|
|
{
|
|
.id = 0x0004b912,
|
|
.mask = 0x0007ffff,
|
|
},
|
|
{ 0, 0},
|
|
};
|
|
|
|
static struct amba_driver tpiu_driver = {
|
|
.drv = {
|
|
.name = "coresight-tpiu",
|
|
.owner = THIS_MODULE,
|
|
.pm = &tpiu_dev_pm_ops,
|
|
},
|
|
.probe = tpiu_probe,
|
|
.remove = tpiu_remove,
|
|
.id_table = tpiu_ids,
|
|
};
|
|
|
|
module_amba_driver(tpiu_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("CoreSight Trace Port Interface Unit driver");
|