mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 01:38:22 +00:00
98 lines
2 KiB
C
98 lines
2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* (C) Copyright 2019
|
||
|
|
* Alex Marginean, NXP
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <dm.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <miiphy.h>
|
||
|
|
|
||
|
|
/* macros copied over from mdio_sandbox.c */
|
||
|
|
#define SANDBOX_PHY_ADDR 5
|
||
|
|
#define SANDBOX_PHY_REG_CNT 2
|
||
|
|
|
||
|
|
struct mdio_mux_sandbox_priv {
|
||
|
|
int enabled;
|
||
|
|
int sel;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int mdio_mux_sandbox_mark_selection(struct udevice *dev, int sel)
|
||
|
|
{
|
||
|
|
struct udevice *mdio;
|
||
|
|
struct mdio_ops *ops;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* find the sandbox parent mdio and write a register on the PHY there
|
||
|
|
* so the mux test can verify selection.
|
||
|
|
*/
|
||
|
|
err = uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &mdio);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
ops = mdio_get_ops(mdio);
|
||
|
|
return ops->write(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
|
||
|
|
SANDBOX_PHY_REG_CNT - 1, (u16)sel);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mdio_mux_sandbox_select(struct udevice *dev, int cur, int sel)
|
||
|
|
{
|
||
|
|
struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev);
|
||
|
|
|
||
|
|
if (!priv->enabled)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
if (cur != priv->sel)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
priv->sel = sel;
|
||
|
|
mdio_mux_sandbox_mark_selection(dev, priv->sel);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mdio_mux_sandbox_deselect(struct udevice *dev, int sel)
|
||
|
|
{
|
||
|
|
struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev);
|
||
|
|
|
||
|
|
if (!priv->enabled)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
if (sel != priv->sel)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
priv->sel = -1;
|
||
|
|
mdio_mux_sandbox_mark_selection(dev, priv->sel);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct mdio_mux_ops mdio_mux_sandbox_ops = {
|
||
|
|
.select = mdio_mux_sandbox_select,
|
||
|
|
.deselect = mdio_mux_sandbox_deselect,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int mdio_mux_sandbox_probe(struct udevice *dev)
|
||
|
|
{
|
||
|
|
struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev);
|
||
|
|
|
||
|
|
priv->enabled = 1;
|
||
|
|
priv->sel = -1;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct udevice_id mdio_mux_sandbox_ids[] = {
|
||
|
|
{ .compatible = "sandbox,mdio-mux" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
U_BOOT_DRIVER(mdio_mux_sandbox) = {
|
||
|
|
.name = "mdio_mux_sandbox",
|
||
|
|
.id = UCLASS_MDIO_MUX,
|
||
|
|
.of_match = mdio_mux_sandbox_ids,
|
||
|
|
.probe = mdio_mux_sandbox_probe,
|
||
|
|
.ops = &mdio_mux_sandbox_ops,
|
||
|
|
.priv_auto_alloc_size = sizeof(struct mdio_mux_sandbox_priv),
|
||
|
|
};
|