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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2009-2015 Cavium, Inc.
*/
#include <linux/platform_device.h>
#include <linux/of_address.h>
#include <linux/of_mdio.h>
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/phy.h>
#include <linux/io.h>
#include "mdio-cavium.h"
static int octeon_mdiobus_probe(struct platform_device *pdev)
{
struct cavium_mdiobus *bus;
struct mii_bus *mii_bus;
struct resource *res_mem;
resource_size_t mdio_phys;
resource_size_t regsize;
union cvmx_smix_en smi_en;
int err = -ENOENT;
mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
if (!mii_bus)
return -ENOMEM;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res_mem == NULL) {
dev_err(&pdev->dev, "found no memory resource\n");
return -ENXIO;
}
bus = mii_bus->priv;
bus->mii_bus = mii_bus;
mdio_phys = res_mem->start;
regsize = resource_size(res_mem);
if (!devm_request_mem_region(&pdev->dev, mdio_phys, regsize,
res_mem->name)) {
dev_err(&pdev->dev, "request_mem_region failed\n");
return -ENXIO;
}
bus->register_base =
(u64)devm_ioremap(&pdev->dev, mdio_phys, regsize);
if (!bus->register_base) {
dev_err(&pdev->dev, "dev_ioremap failed\n");
return -ENOMEM;
}
smi_en.u64 = 0;
smi_en.s.en = 1;
oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
bus->mii_bus->name = KBUILD_MODNAME;
snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%llx", bus->register_base);
bus->mii_bus->parent = &pdev->dev;
bus->mii_bus->read = cavium_mdiobus_read;
bus->mii_bus->write = cavium_mdiobus_write;
platform_set_drvdata(pdev, bus);
err = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node);
if (err)
goto fail_register;
dev_info(&pdev->dev, "Probed\n");
return 0;
fail_register:
mdiobus_free(bus->mii_bus);
smi_en.u64 = 0;
oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
return err;
}
static int octeon_mdiobus_remove(struct platform_device *pdev)
{
struct cavium_mdiobus *bus;
union cvmx_smix_en smi_en;
bus = platform_get_drvdata(pdev);
mdiobus_unregister(bus->mii_bus);
mdiobus_free(bus->mii_bus);
smi_en.u64 = 0;
oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
return 0;
}
static const struct of_device_id octeon_mdiobus_match[] = {
{
.compatible = "cavium,octeon-3860-mdio",
},
{},
};
MODULE_DEVICE_TABLE(of, octeon_mdiobus_match);
static struct platform_driver octeon_mdiobus_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = octeon_mdiobus_match,
},
.probe = octeon_mdiobus_probe,
.remove = octeon_mdiobus_remove,
};
void octeon_mdiobus_force_mod_depencency(void)
{
/* Let ethernet drivers force us to be loaded. */
}
EXPORT_SYMBOL(octeon_mdiobus_force_mod_depencency);
module_platform_driver(octeon_mdiobus_driver);
MODULE_DESCRIPTION("Cavium OCTEON MDIO bus driver");
MODULE_AUTHOR("David Daney");
MODULE_LICENSE("GPL v2");
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