u-boot/drivers/net/phy/fixed.c
Hannes Schmelzer db40c1aa1c drivers/net/phy: add fixed-phy / fixed-link support
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>
2017-03-26 09:58:26 -05:00

82 lines
1.8 KiB
C

/*
* Fixed-Link phy
*
* Copyright 2017 Bernecker & Rainer Industrieelektronik GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <phy.h>
#include <dm.h>
#include <fdt_support.h>
DECLARE_GLOBAL_DATA_PTR;
int fixedphy_probe(struct phy_device *phydev)
{
struct fixed_link *priv;
int ofnode = phydev->addr;
u32 val;
/* check for mandatory properties within fixed-link node */
val = fdt_getprop_u32_default_node(gd->fdt_blob,
ofnode, 0, "speed", 0);
if (val != SPEED_10 && val != SPEED_100 && val != SPEED_1000) {
printf("ERROR: no/invalid speed given in fixed-link node!");
return -EINVAL;
}
priv = malloc(sizeof(*priv));
if (!priv)
return -ENOMEM;
memset(priv, 0, sizeof(*priv));
phydev->priv = priv;
phydev->addr = 0;
priv->link_speed = val;
priv->duplex = fdtdec_get_bool(gd->fdt_blob, ofnode, "full-duplex");
priv->pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "pause");
priv->asym_pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "asym-pause");
/* fixed-link phy must not be reset by core phy code */
phydev->flags |= PHY_FLAG_BROKEN_RESET;
return 0;
}
int fixedphy_startup(struct phy_device *phydev)
{
struct fixed_link *priv = phydev->priv;
phydev->asym_pause = priv->asym_pause;
phydev->pause = priv->pause;
phydev->duplex = priv->duplex;
phydev->speed = priv->link_speed;
phydev->link = 1;
return 0;
}
int fixedphy_shutdown(struct phy_device *phydev)
{
return 0;
}
static struct phy_driver fixedphy_driver = {
.uid = PHY_FIXED_ID,
.mask = 0xffffffff,
.name = "Fixed PHY",
.features = PHY_GBIT_FEATURES | SUPPORTED_MII,
.probe = fixedphy_probe,
.startup = fixedphy_startup,
.shutdown = fixedphy_shutdown,
};
int phy_fixed_init(void)
{
phy_register(&fixedphy_driver);
return 0;
}