77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* Pvpanic MMIO Device Support
|
||
|
|
*
|
||
|
|
* Copyright (C) 2013 Fujitsu.
|
||
|
|
* Copyright (C) 2018 ZTE.
|
||
|
|
* Copyright (C) 2021 Oracle.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/kexec.h>
|
||
|
|
#include <linux/mod_devicetable.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
#include <uapi/misc/pvpanic.h>
|
||
|
|
|
||
|
|
#include "pvpanic.h"
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Hu Tao <hutao@cn.fujitsu.com>");
|
||
|
|
MODULE_DESCRIPTION("pvpanic-mmio device driver");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
|
||
|
|
static int pvpanic_mmio_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
struct resource *res;
|
||
|
|
void __iomem *base;
|
||
|
|
|
||
|
|
res = platform_get_mem_or_io(pdev, 0);
|
||
|
|
if (!res)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
switch (resource_type(res)) {
|
||
|
|
case IORESOURCE_IO:
|
||
|
|
base = devm_ioport_map(dev, res->start, resource_size(res));
|
||
|
|
if (!base)
|
||
|
|
return -ENOMEM;
|
||
|
|
break;
|
||
|
|
case IORESOURCE_MEM:
|
||
|
|
base = devm_ioremap_resource(dev, res);
|
||
|
|
if (IS_ERR(base))
|
||
|
|
return PTR_ERR(base);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return devm_pvpanic_probe(dev, base);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id pvpanic_mmio_match[] = {
|
||
|
|
{ .compatible = "qemu,pvpanic-mmio", },
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, pvpanic_mmio_match);
|
||
|
|
|
||
|
|
static const struct acpi_device_id pvpanic_device_ids[] = {
|
||
|
|
{ "QEMU0001", 0 },
|
||
|
|
{ "", 0 }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
|
||
|
|
|
||
|
|
static struct platform_driver pvpanic_mmio_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "pvpanic-mmio",
|
||
|
|
.of_match_table = pvpanic_mmio_match,
|
||
|
|
.acpi_match_table = pvpanic_device_ids,
|
||
|
|
.dev_groups = pvpanic_dev_groups,
|
||
|
|
},
|
||
|
|
.probe = pvpanic_mmio_probe,
|
||
|
|
};
|
||
|
|
module_platform_driver(pvpanic_mmio_driver);
|