Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-11 23:47:24 +00:00
Code Issues Projects Releases Packages Wiki Activity

net: fec: add support for DM_MDIO

Browse source 
Add support for DM_MDIO by registering a UCLASS_MDIO driver and
attempting to use it. This is necessary if wanting to use a DSA
driver for example hanging off of the FEC MAC.

Care is taken to fallback to non DM_MDIO mii bus as several boards define
DM_MDIO without having the proper device-tree configuration necessary
such as an mdio subnode, a phy-mode prop, and either a valid phy-handle
prop or fixed-phy subnode which will cause dm_eth_phy_connect() to fail.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
This commit is contained in:
Tim Harvey 2022-11-30 09:42:49 -08:00 committed by Tom Rini
parent 8abb9f6b17
commit 3b8f99a3e7
1 changed files with 88 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

90
drivers/net/fec_mxc.c
View file

@ -30,6 +30,8 @@
#include <asm/arch/imx-regs.h>
#include <asm/mach-imx/sys_proto.h>
#include <asm-generic/gpio.h>
#include <dm/device_compat.h>
#include <dm/lists.h>
#include "fec_mxc.h"
#include <eth_phy.h>
@ -1019,6 +1021,81 @@ struct mii_dev *fec_get_miibus(ulong base_addr, int dev_id)
return bus;
}
#ifdef CONFIG_DM_MDIO
struct dm_fec_mdio_priv {
struct ethernet_regs *regs;
};
static int dm_fec_mdio_read(struct udevice *dev, int addr, int devad, int reg)
{
struct dm_fec_mdio_priv *priv = dev_get_priv(dev);
return fec_mdio_read(priv->regs, addr, reg);
}
static int dm_fec_mdio_write(struct udevice *dev, int addr, int devad, int reg, u16 data)
{
struct dm_fec_mdio_priv *priv = dev_get_priv(dev);
return fec_mdio_write(priv->regs, addr, reg, data);
}
static const struct mdio_ops dm_fec_mdio_ops = {
.read = dm_fec_mdio_read,
.write = dm_fec_mdio_write,
};
static int dm_fec_mdio_probe(struct udevice *dev)
{
struct dm_fec_mdio_priv *priv = dev_get_priv(dev);
priv->regs = (struct ethernet_regs *)ofnode_get_addr(dev_ofnode(dev->parent));
return 0;
}
U_BOOT_DRIVER(fec_mdio) = {
.name = "fec_mdio",
.id = UCLASS_MDIO,
.probe = dm_fec_mdio_probe,
.ops = &dm_fec_mdio_ops,
.priv_auto = sizeof(struct dm_fec_mdio_priv),
};
static int dm_fec_bind_mdio(struct udevice *dev)
{
struct udevice *mdiodev;
const char *name;
ofnode mdio;
int ret = -ENODEV;
/* for a UCLASS_MDIO driver we need to bind and probe manually
* for an internal MDIO bus that has no dt compatible of its own
*/
ofnode_for_each_subnode(mdio, dev_ofnode(dev)) {
name = ofnode_get_name(mdio);
if (strcmp(name, "mdio"))
continue;
ret = device_bind_driver_to_node(dev, "fec_mdio",
name, mdio, &mdiodev);
if (ret) {
printf("%s bind %s failed: %d\n", __func__, name, ret);
break;
}
/* need to probe it as there is no compatible to do so */
ret = uclass_get_device_by_ofnode(UCLASS_MDIO, mdio, &mdiodev);
if (!ret)
return 0;
printf("%s probe %s failed: %d\n", __func__, name, ret);
}
return ret;
}
#endif
static int fecmxc_read_rom_hwaddr(struct udevice *dev)
{
struct fec_priv *priv = dev_get_priv(dev);
@ -1082,7 +1159,7 @@ static int device_get_phy_addr(struct fec_priv *priv, struct udevice *dev)
static int fec_phy_init(struct fec_priv *priv, struct udevice *dev)
{
struct phy_device *phydev;
struct phy_device *phydev = NULL;
int addr;
addr = device_get_phy_addr(priv, dev);
@ -1090,7 +1167,10 @@ static int fec_phy_init(struct fec_priv *priv, struct udevice *dev)
addr = CFG_FEC_MXC_PHYADDR;
#endif
phydev = phy_connect(priv->bus, addr, dev, priv->interface);
if (IS_ENABLED(CONFIG_DM_MDIO))
phydev = dm_eth_phy_connect(dev);
if (!phydev)
phydev = phy_connect(priv->bus, addr, dev, priv->interface);
if (!phydev)
return -ENODEV;
@ -1221,6 +1301,12 @@ static int fecmxc_probe(struct udevice *dev)
priv->dev_id = dev_seq(dev);
#ifdef CONFIG_DM_MDIO
ret = dm_fec_bind_mdio(dev);
if (ret && ret != -ENODEV)
return ret;
#endif
#ifdef CONFIG_DM_ETH_PHY
bus = eth_phy_get_mdio_bus(dev);
#endif