mdio_sandbox.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2019
* Alex Marginean, NXP
*/
#include <dm.h>
#include <errno.h>
#include <miiphy.h>
#define SANDBOX_PHY_ADDR 5
#define SANDBOX_PHY_REG_CNT 2
struct mdio_sandbox_priv {
int enabled;
u16 reg[SANDBOX_PHY_REG_CNT];
};
static int mdio_sandbox_read(struct udevice *dev, int addr, int devad, int reg)
{
struct mdio_sandbox_priv *priv = dev_get_priv(dev);
if (!priv->enabled)
return -ENODEV;
if (addr != SANDBOX_PHY_ADDR)
return -ENODEV;
if (devad != MDIO_DEVAD_NONE)
return -ENODEV;
if (reg < 0 || reg >= SANDBOX_PHY_REG_CNT)
return -ENODEV;
return priv->reg[reg];
}
static int mdio_sandbox_write(struct udevice *dev, int addr, int devad, int reg,
u16 val)
{
struct mdio_sandbox_priv *priv = dev_get_priv(dev);
if (!priv->enabled)
return -ENODEV;
if (addr != SANDBOX_PHY_ADDR)
return -ENODEV;
if (devad != MDIO_DEVAD_NONE)
return -ENODEV;
if (reg < 0 || reg >= SANDBOX_PHY_REG_CNT)
return -ENODEV;
priv->reg[reg] = val;
return 0;
}
static int mdio_sandbox_reset(struct udevice *dev)
{
struct mdio_sandbox_priv *priv = dev_get_priv(dev);
int i;
for (i = 0; i < SANDBOX_PHY_REG_CNT; i++)
priv->reg[i] = 0;
return 0;
}
static const struct mdio_ops mdio_sandbox_ops = {
.read = mdio_sandbox_read,
.write = mdio_sandbox_write,
.reset = mdio_sandbox_reset,
};
static int mdio_sandbox_probe(struct udevice *dev)
{
struct mdio_sandbox_priv *priv = dev_get_priv(dev);
priv->enabled = 1;
return 0;
}
static const struct udevice_id mdio_sandbox_ids[] = {
{ .compatible = "sandbox,mdio" },
{ }
};
U_BOOT_DRIVER(mdio_sandbox) = {
.name = "mdio_sandbox",
.id = UCLASS_MDIO,
.of_match = mdio_sandbox_ids,
.probe = mdio_sandbox_probe,
.ops = &mdio_sandbox_ops,
.priv_auto_alloc_size = sizeof(struct mdio_sandbox_priv),
};