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c3452b50c3
Adds UCLASS_MDIO DM class supporting MDIO buses that are probed as stand-alone devices. Useful in particular for systems that support DM_ETH and have a stand-alone MDIO hardware block shared by multiple Ethernet interfaces. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
116 lines
2.5 KiB
C
116 lines
2.5 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 <common.h>
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#include <dm.h>
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#include <miiphy.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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void dm_mdio_probe_devices(void)
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{
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struct udevice *it;
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struct uclass *uc;
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uclass_get(UCLASS_MDIO, &uc);
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uclass_foreach_dev(it, uc) {
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device_probe(it);
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}
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}
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static int dm_mdio_post_bind(struct udevice *dev)
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{
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/*
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* MDIO command doesn't like spaces in names, don't allow them to keep
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* it happy
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*/
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if (strchr(dev->name, ' ')) {
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debug("\nError: MDIO device name \"%s\" has a space!\n",
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dev->name);
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return -EINVAL;
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}
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return 0;
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}
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/*
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* Following read/write/reset functions are registered with legacy MII code.
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* These are called for PHY operations by upper layers and we further call the
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* DM MDIO driver functions.
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*/
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static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
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{
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struct udevice *dev = mii_bus->priv;
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return mdio_get_ops(dev)->read(dev, addr, devad, reg);
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}
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static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
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u16 val)
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{
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struct udevice *dev = mii_bus->priv;
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return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
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}
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static int mdio_reset(struct mii_dev *mii_bus)
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{
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struct udevice *dev = mii_bus->priv;
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if (mdio_get_ops(dev)->reset)
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return mdio_get_ops(dev)->reset(dev);
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else
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return 0;
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}
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static int dm_mdio_post_probe(struct udevice *dev)
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{
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struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
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pdata->mii_bus = mdio_alloc();
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pdata->mii_bus->read = mdio_read;
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pdata->mii_bus->write = mdio_write;
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pdata->mii_bus->reset = mdio_reset;
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pdata->mii_bus->priv = dev;
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strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN);
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return mdio_register(pdata->mii_bus);
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}
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static int dm_mdio_pre_remove(struct udevice *dev)
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{
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struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
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struct mdio_ops *ops = mdio_get_ops(dev);
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if (ops->reset)
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ops->reset(dev);
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mdio_unregister(pdata->mii_bus);
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mdio_free(pdata->mii_bus);
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return 0;
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}
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struct phy_device *dm_mdio_phy_connect(struct udevice *dev, int addr,
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struct udevice *ethdev,
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phy_interface_t interface)
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{
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struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
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if (device_probe(dev))
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return 0;
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return phy_connect(pdata->mii_bus, addr, ethdev, interface);
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}
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UCLASS_DRIVER(mdio) = {
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.id = UCLASS_MDIO,
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.name = "mdio",
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.post_bind = dm_mdio_post_bind,
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.post_probe = dm_mdio_post_probe,
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.pre_remove = dm_mdio_pre_remove,
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.per_device_auto_alloc_size = sizeof(struct mdio_perdev_priv),
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};
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