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generic: ar8216: add support for separated mdio bus for phy access

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Atheros FE switches have a builtin mdio master available for PHY
accessing and on ar724x/ar933x builtin switches this mdio master
is the only way of accessing PHYs.

After this patch if there is phy_read/phy_write method available
in ar8xxx_chip we register a separated mdio bus for accessing PHYs.

Still adds support for mdio device probing only since this isn't
needed for those switches registered using PHY probing.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
This commit is contained in:
Chuanhong Guo 2019-01-10 19:30:35 +08:00 committed by Petr Štetiar
parent cb7d96499c
commit cc817392f4
2 changed files with 37 additions and 1 deletions
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35
target/linux/generic/files/drivers/net/phy/ar8216.c
View File

@ -190,7 +190,7 @@ ar8xxx_phy_init(struct ar8xxx_priv *priv)
int i; int i;
struct mii_bus *bus; struct mii_bus *bus;
bus = priv->mii_bus; bus = priv->sw_mii_bus ?: priv->mii_bus;
for (i = 0; i < AR8XXX_NUM_PHYS; i++) { for (i = 0; i < AR8XXX_NUM_PHYS; i++) {
if (priv->chip->phy_fixup) if (priv->chip->phy_fixup)
priv->chip->phy_fixup(priv, i); priv->chip->phy_fixup(priv, i);
@ -1683,6 +1683,21 @@ ar8xxx_sw_set_flush_port_arl_table(struct switch_dev *dev,
return ret; return ret;
} }
static int
ar8xxx_phy_read(struct mii_bus *bus, int phy_addr, int reg_addr)
{
struct ar8xxx_priv *priv = bus->priv;
return priv->chip->phy_read(priv, phy_addr, reg_addr);
}
static int
ar8xxx_phy_write(struct mii_bus *bus, int phy_addr, int reg_addr,
u16 reg_val)
{
struct ar8xxx_priv *priv = bus->priv;
return priv->chip->phy_write(priv, phy_addr, reg_addr, reg_val);
}
static const struct switch_attr ar8xxx_sw_attr_globals[] = { static const struct switch_attr ar8xxx_sw_attr_globals[] = {
{ {
.type = SWITCH_TYPE_INT, .type = SWITCH_TYPE_INT,
@ -2471,6 +2486,7 @@ ar8xxx_mdiodev_probe(struct mdio_device *mdiodev)
const struct of_device_id *match; const struct of_device_id *match;
struct ar8xxx_priv *priv; struct ar8xxx_priv *priv;
struct switch_dev *swdev; struct switch_dev *swdev;
struct device_node *mdio_node;
int ret; int ret;
match = of_match_device(ar8xxx_mdiodev_of_match, &mdiodev->dev); match = of_match_device(ar8xxx_mdiodev_of_match, &mdiodev->dev);
@ -2493,6 +2509,21 @@ ar8xxx_mdiodev_probe(struct mdio_device *mdiodev)
if (ret) if (ret)
goto free_priv; goto free_priv;
if (priv->chip->phy_read && priv->chip->phy_write) {
priv->sw_mii_bus = devm_mdiobus_alloc(&mdiodev->dev);
priv->sw_mii_bus->name = "ar8xxx-mdio";
priv->sw_mii_bus->read = ar8xxx_phy_read;
priv->sw_mii_bus->write = ar8xxx_phy_write;
priv->sw_mii_bus->priv = priv;
priv->sw_mii_bus->parent = &mdiodev->dev;
snprintf(priv->sw_mii_bus->id, MII_BUS_ID_SIZE, "%s",
dev_name(&mdiodev->dev));
mdio_node = of_get_child_by_name(priv->pdev->of_node, "mdio-bus");
ret = of_mdiobus_register(priv->sw_mii_bus, mdio_node);
if (ret)
goto free_priv;
}
swdev = &priv->dev; swdev = &priv->dev;
swdev->alias = dev_name(&mdiodev->dev); swdev->alias = dev_name(&mdiodev->dev);
ret = register_switch(swdev, NULL); ret = register_switch(swdev, NULL);
@ -2548,6 +2579,8 @@ ar8xxx_mdiodev_remove(struct mdio_device *mdiodev)
unregister_switch(&priv->dev); unregister_switch(&priv->dev);
ar8xxx_mib_stop(priv); ar8xxx_mib_stop(priv);
if(priv->sw_mii_bus)
mdiobus_unregister(priv->sw_mii_bus);
ar8xxx_free(priv); ar8xxx_free(priv);
} }

3
target/linux/generic/files/drivers/net/phy/ar8216.h
View File

@ -433,6 +433,8 @@ struct ar8xxx_chip {
u32 *status, enum arl_op op); u32 *status, enum arl_op op);
int (*sw_hw_apply)(struct switch_dev *dev); int (*sw_hw_apply)(struct switch_dev *dev);
void (*phy_rgmii_set)(struct ar8xxx_priv *priv, struct phy_device *phydev); void (*phy_rgmii_set)(struct ar8xxx_priv *priv, struct phy_device *phydev);
int (*phy_read)(struct ar8xxx_priv *priv, int addr, int regnum);
int (*phy_write)(struct ar8xxx_priv *priv, int addr, int regnum, u16 val);
const struct ar8xxx_mib_desc *mib_decs; const struct ar8xxx_mib_desc *mib_decs;
unsigned num_mibs; unsigned num_mibs;
@ -442,6 +444,7 @@ struct ar8xxx_chip {
struct ar8xxx_priv { struct ar8xxx_priv {
struct switch_dev dev; struct switch_dev dev;
struct mii_bus *mii_bus; struct mii_bus *mii_bus;
struct mii_bus *sw_mii_bus;
struct phy_device *phy; struct phy_device *phy;
struct device *pdev; struct device *pdev;