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https://github.com/brain-hackers/u-boot-brain
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db40c1aa1c
This patch adds support for having a "fixed-link" to some other MAC (like some embedded switch-device). For this purpose we introduce a new phy-driver, called "Fixed PHY". Fixed PHY works only with CONFIG_DM_ETH enabled, since the fixed-link is described with a subnode below ethernet interface. Most ethernet drivers (unfortunately not all are following same scheme for searching/attaching phys) are calling "phy_connect(...)" for getting a phy-device. At this point we link in, we search here for a subnode called "fixed- link", once found we start phy_device_create(...) with the special phy- id PHY_FIXED_ID (0xa5a55a5a). During init the "Fixed PHY" driver has registered with this id and now gets probed, during probe we get all the details about fixed-link out of dts, later on the phy reports this values. Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com> Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at> Acked-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
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* Fixed-Link phy
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*
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* Copyright 2017 Bernecker & Rainer Industrieelektronik GmbH
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#include <common.h>
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#include <phy.h>
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#include <dm.h>
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#include <fdt_support.h>
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DECLARE_GLOBAL_DATA_PTR;
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int fixedphy_probe(struct phy_device *phydev)
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{
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struct fixed_link *priv;
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int ofnode = phydev->addr;
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u32 val;
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/* check for mandatory properties within fixed-link node */
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val = fdt_getprop_u32_default_node(gd->fdt_blob,
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ofnode, 0, "speed", 0);
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if (val != SPEED_10 && val != SPEED_100 && val != SPEED_1000) {
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printf("ERROR: no/invalid speed given in fixed-link node!");
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return -EINVAL;
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}
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priv = malloc(sizeof(*priv));
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if (!priv)
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return -ENOMEM;
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memset(priv, 0, sizeof(*priv));
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phydev->priv = priv;
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phydev->addr = 0;
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priv->link_speed = val;
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priv->duplex = fdtdec_get_bool(gd->fdt_blob, ofnode, "full-duplex");
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priv->pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "pause");
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priv->asym_pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "asym-pause");
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/* fixed-link phy must not be reset by core phy code */
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phydev->flags |= PHY_FLAG_BROKEN_RESET;
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return 0;
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}
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int fixedphy_startup(struct phy_device *phydev)
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{
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struct fixed_link *priv = phydev->priv;
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phydev->asym_pause = priv->asym_pause;
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phydev->pause = priv->pause;
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phydev->duplex = priv->duplex;
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phydev->speed = priv->link_speed;
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phydev->link = 1;
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return 0;
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}
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int fixedphy_shutdown(struct phy_device *phydev)
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{
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return 0;
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}
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static struct phy_driver fixedphy_driver = {
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.uid = PHY_FIXED_ID,
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.mask = 0xffffffff,
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.name = "Fixed PHY",
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.features = PHY_GBIT_FEATURES | SUPPORTED_MII,
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.probe = fixedphy_probe,
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.startup = fixedphy_startup,
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.shutdown = fixedphy_shutdown,
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};
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int phy_fixed_init(void)
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{
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phy_register(&fixedphy_driver);
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return 0;
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}
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