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net: designware: add DM_MDIO support

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Add support for DM_MDIO to connect to PHY and expose a MDIO device for the
internal MDIO bus in order to dynamically connect to MDIO PHYs with DT
with eventual MDIO muxes in between.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Neil Armstrong
2021-02-24 15:02:39 +01:00
parent 6c7bc9fec0
commit 5160b4567c
1 changed files with 92 additions and 1 deletions
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93
drivers/net/designware.c
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@@ -21,7 +21,9 @@
#include <reset.h>
#include <asm/cache.h>
#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <dm/devres.h>
#include <dm/lists.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/err.h>
@@ -122,6 +124,55 @@ static int dw_mdio_reset(struct mii_dev *bus)
}
#endif
#if IS_ENABLED(CONFIG_DM_MDIO)
int designware_eth_mdio_read(struct udevice *mdio_dev, int addr, int devad, int reg)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(mdio_dev);
return dw_mdio_read(pdata->mii_bus, addr, devad, reg);
}
int designware_eth_mdio_write(struct udevice *mdio_dev, int addr, int devad, int reg, u16 val)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(mdio_dev);
return dw_mdio_write(pdata->mii_bus, addr, devad, reg, val);
}
#if CONFIG_IS_ENABLED(DM_GPIO)
int designware_eth_mdio_reset(struct udevice *mdio_dev)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(mdio_dev);
return dw_mdio_reset(pdata->mii_bus);
}
#endif
static const struct mdio_ops designware_eth_mdio_ops = {
.read = designware_eth_mdio_read,
.write = designware_eth_mdio_write,
#if CONFIG_IS_ENABLED(DM_GPIO)
.reset = designware_eth_mdio_reset,
#endif
};
static int designware_eth_mdio_probe(struct udevice *dev)
{
/* Use the priv data of parent */
dev_set_priv(dev, dev_get_priv(dev->parent));
return 0;
}
U_BOOT_DRIVER(designware_eth_mdio) = {
.name = "eth_designware_mdio",
.id = UCLASS_MDIO,
.probe = designware_eth_mdio_probe,
.ops = &designware_eth_mdio_ops,
.plat_auto = sizeof(struct mdio_perdev_priv),
};
#endif
static int dw_mdio_init(const char *name, void *priv)
{
struct mii_dev *bus = mdio_alloc();
@@ -143,6 +194,34 @@ static int dw_mdio_init(const char *name, void *priv)
return mdio_register(bus);
}
#if IS_ENABLED(CONFIG_DM_MDIO)
static int dw_dm_mdio_init(const char *name, void *priv)
{
struct udevice *dev = priv;
ofnode node;
int ret;
ofnode_for_each_subnode(node, dev_ofnode(dev)) {
const char *subnode_name = ofnode_get_name(node);
struct udevice *mdiodev;
if (strcmp(subnode_name, "mdio"))
continue;
ret = device_bind_driver_to_node(dev, "eth_designware_mdio",
subnode_name, node, &mdiodev);
if (ret)
debug("%s: not able to bind mdio device node\n", __func__);
return 0;
}
printf("%s: mdio node is missing, registering legacy mdio bus", __func__);
return dw_mdio_init(name, priv);
}
#endif
static void tx_descs_init(struct dw_eth_dev *priv)
{
struct eth_dma_regs *dma_p = priv->dma_regs_p;
@@ -487,7 +566,14 @@ static int _dw_free_pkt(struct dw_eth_dev *priv)
static int dw_phy_init(struct dw_eth_dev *priv, void *dev)
{
struct phy_device *phydev;
int phy_addr = -1, ret;
int ret;
#if IS_ENABLED(CONFIG_DM_MDIO) && IS_ENABLED(CONFIG_DM_ETH)
phydev = dm_eth_phy_connect(dev);
if (!phydev)
return -ENODEV;
#else
int phy_addr = -1;
#ifdef CONFIG_PHY_ADDR
phy_addr = CONFIG_PHY_ADDR;
@@ -496,6 +582,7 @@ static int dw_phy_init(struct dw_eth_dev *priv, void *dev)
phydev = phy_connect(priv->bus, phy_addr, dev, priv->interface);
if (!phydev)
return -ENODEV;
#endif
phydev->supported &= PHY_GBIT_FEATURES;
if (priv->max_speed) {
@@ -759,7 +846,11 @@ int designware_eth_probe(struct udevice *dev)
priv->interface = pdata->phy_interface;
priv->max_speed = pdata->max_speed;
#if IS_ENABLED(CONFIG_DM_MDIO)
ret = dw_dm_mdio_init(dev->name, dev);
#else
ret = dw_mdio_init(dev->name, dev);
#endif
if (ret) {
err = ret;
goto mdio_err;