mdio-uclass.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2019
* Alex Marginean, NXP
*/
#include <common.h>
#include <dm.h>
#include <miiphy.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
void dm_mdio_probe_devices(void)
{
struct udevice *it;
struct uclass *uc;
uclass_get(UCLASS_MDIO, &uc);
uclass_foreach_dev(it, uc) {
device_probe(it);
}
}
static int dm_mdio_post_bind(struct udevice *dev)
{
/*
* MDIO command doesn't like spaces in names, don't allow them to keep
* it happy
*/
if (strchr(dev->name, ' ')) {
debug("\nError: MDIO device name \"%s\" has a space!\n",
dev->name);
return -EINVAL;
}
return 0;
}
/*
* Following read/write/reset functions are registered with legacy MII code.
* These are called for PHY operations by upper layers and we further call the
* DM MDIO driver functions.
*/
static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
{
struct udevice *dev = mii_bus->priv;
return mdio_get_ops(dev)->read(dev, addr, devad, reg);
}
static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
u16 val)
{
struct udevice *dev = mii_bus->priv;
return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
}
static int mdio_reset(struct mii_dev *mii_bus)
{
struct udevice *dev = mii_bus->priv;
if (mdio_get_ops(dev)->reset)
return mdio_get_ops(dev)->reset(dev);
else
return 0;
}
static int dm_mdio_post_probe(struct udevice *dev)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
pdata->mii_bus = mdio_alloc();
pdata->mii_bus->read = mdio_read;
pdata->mii_bus->write = mdio_write;
pdata->mii_bus->reset = mdio_reset;
pdata->mii_bus->priv = dev;
strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN - 1);
return mdio_register(pdata->mii_bus);
}
static int dm_mdio_pre_remove(struct udevice *dev)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
struct mdio_ops *ops = mdio_get_ops(dev);
if (ops->reset)
ops->reset(dev);
mdio_unregister(pdata->mii_bus);
mdio_free(pdata->mii_bus);
return 0;
}
struct phy_device *dm_mdio_phy_connect(struct udevice *dev, int addr,
struct udevice *ethdev,
phy_interface_t interface)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
if (device_probe(dev))
return 0;
return phy_connect(pdata->mii_bus, addr, ethdev, interface);
}
UCLASS_DRIVER(mdio) = {
.id = UCLASS_MDIO,
.name = "mdio",
.post_bind = dm_mdio_post_bind,
.post_probe = dm_mdio_post_probe,
.pre_remove = dm_mdio_pre_remove,
.per_device_auto_alloc_size = sizeof(struct mdio_perdev_priv),
};