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