mirror of
https://github.com/brain-hackers/u-boot-brain
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ec9594a50f
A very simple test for DM_MDIO, mimicks a register write/read through the sandbox bus to a dummy PHY. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
// 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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#define SANDBOX_PHY_ADDR 5
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#define SANDBOX_PHY_REG 0
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struct mdio_sandbox_priv {
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int enabled;
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u16 reg;
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};
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static int mdio_sandbox_read(struct udevice *dev, int addr, int devad, int reg)
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{
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struct mdio_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 (addr != SANDBOX_PHY_ADDR)
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return -ENODEV;
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if (devad != MDIO_DEVAD_NONE)
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return -ENODEV;
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if (reg != SANDBOX_PHY_REG)
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return -ENODEV;
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return priv->reg;
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}
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static int mdio_sandbox_write(struct udevice *dev, int addr, int devad, int reg,
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u16 val)
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{
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struct mdio_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 (addr != SANDBOX_PHY_ADDR)
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return -ENODEV;
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if (devad != MDIO_DEVAD_NONE)
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return -ENODEV;
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if (reg != SANDBOX_PHY_REG)
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return -ENODEV;
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priv->reg = val;
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return 0;
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}
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static int mdio_sandbox_reset(struct udevice *dev)
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{
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struct mdio_sandbox_priv *priv = dev_get_priv(dev);
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priv->reg = 0;
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return 0;
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}
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static const struct mdio_ops mdio_sandbox_ops = {
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.read = mdio_sandbox_read,
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.write = mdio_sandbox_write,
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.reset = mdio_sandbox_reset,
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};
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static int mdio_sandbox_probe(struct udevice *dev)
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{
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struct mdio_sandbox_priv *priv = dev_get_priv(dev);
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priv->enabled = 1;
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return 0;
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}
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static const struct udevice_id mdio_sandbox_ids[] = {
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{ .compatible = "sandbox,mdio" },
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{ }
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};
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U_BOOT_DRIVER(mdio_sandbox) = {
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.name = "mdio_sandbox",
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.id = UCLASS_MDIO,
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.of_match = mdio_sandbox_ids,
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.probe = mdio_sandbox_probe,
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.ops = &mdio_sandbox_ops,
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.priv_auto_alloc_size = sizeof(struct mdio_sandbox_priv),
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};
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