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// SPDX-License-Identifier: GPL-2.0
/*
* Generic DFL driver for Userspace I/O devicess
*
* Copyright (C) 2021 Intel Corporation, Inc.
*/
#include <linux/dfl.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/uio_driver.h>
#define DRIVER_NAME "uio_dfl"
static int uio_dfl_probe(struct dfl_device *ddev)
{
struct resource *r = &ddev->mmio_res;
struct device *dev = &ddev->dev;
struct uio_info *uioinfo;
struct uio_mem *uiomem;
int ret;
uioinfo = devm_kzalloc(dev, sizeof(struct uio_info), GFP_KERNEL);
if (!uioinfo)
return -ENOMEM;
uioinfo->name = DRIVER_NAME;
uioinfo->version = "0";
uiomem = &uioinfo->mem[0];
uiomem->memtype = UIO_MEM_PHYS;
uiomem->addr = r->start & PAGE_MASK;
uiomem->offs = r->start & ~PAGE_MASK;
uiomem->size = (uiomem->offs + resource_size(r)
+ PAGE_SIZE - 1) & PAGE_MASK;
uiomem->name = r->name;
/* Irq is yet to be supported */
uioinfo->irq = UIO_IRQ_NONE;
ret = devm_uio_register_device(dev, uioinfo);
if (ret)
dev_err(dev, "unable to register uio device\n");
return ret;
}
#define FME_FEATURE_ID_ETH_GROUP 0x10
#define FME_FEATURE_ID_HSSI_SUBSYS 0x15
#define FME_FEATURE_ID_VENDOR_SPECIFIC 0x23
#define PORT_FEATURE_ID_IOPLL_USRCLK 0x14
static const struct dfl_device_id uio_dfl_ids[] = {
{ FME_ID, FME_FEATURE_ID_ETH_GROUP },
{ FME_ID, FME_FEATURE_ID_HSSI_SUBSYS },
{ FME_ID, FME_FEATURE_ID_VENDOR_SPECIFIC },
{ PORT_ID, PORT_FEATURE_ID_IOPLL_USRCLK },
{ }
};
MODULE_DEVICE_TABLE(dfl, uio_dfl_ids);
static struct dfl_driver uio_dfl_driver = {
.drv = {
.name = DRIVER_NAME,
},
.id_table = uio_dfl_ids,
.probe = uio_dfl_probe,
};
module_dfl_driver(uio_dfl_driver);
MODULE_DESCRIPTION("Generic DFL driver for Userspace I/O devices");
MODULE_AUTHOR("Intel Corporation");
MODULE_LICENSE("GPL v2");
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