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-rw-r--r--drivers/net/ethernet/ibm/emac/Kconfig1
-rw-r--r--drivers/net/ethernet/ibm/emac/core.c254
-rw-r--r--drivers/net/ethernet/ibm/emac/core.h4
3 files changed, 252 insertions, 7 deletions
diff --git a/drivers/net/ethernet/ibm/emac/Kconfig b/drivers/net/ethernet/ibm/emac/Kconfig
index 3f44a30e0615..90d49191beb3 100644
--- a/drivers/net/ethernet/ibm/emac/Kconfig
+++ b/drivers/net/ethernet/ibm/emac/Kconfig
@@ -2,6 +2,7 @@ config IBM_EMAC
tristate "IBM EMAC Ethernet support"
depends on PPC_DCR
select CRC32
+ select PHYLIB
help
This driver supports the IBM EMAC family of Ethernet controllers
typically found on 4xx embedded PowerPC chips, but also on the
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index 6ead2335a169..275c2e2349ad 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -42,6 +42,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_net.h>
+#include <linux/of_mdio.h>
#include <linux/slab.h>
#include <asm/processor.h>
@@ -2420,6 +2421,219 @@ static int emac_read_uint_prop(struct device_node *np, const char *name,
return 0;
}
+static void emac_adjust_link(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ struct phy_device *phy = dev->phy_dev;
+
+ dev->phy.autoneg = phy->autoneg;
+ dev->phy.speed = phy->speed;
+ dev->phy.duplex = phy->duplex;
+ dev->phy.pause = phy->pause;
+ dev->phy.asym_pause = phy->asym_pause;
+ dev->phy.advertising = phy->advertising;
+}
+
+static int emac_mii_bus_read(struct mii_bus *bus, int addr, int regnum)
+{
+ int ret = emac_mdio_read(bus->priv, addr, regnum);
+ /* This is a workaround for powered down ports/phys.
+ * In the wild, this was seen on the Cisco Meraki MX60(W).
+ * This hardware disables ports as part of the handoff
+ * procedure. Accessing the ports will lead to errors
+ * (-ETIMEDOUT, -EREMOTEIO) that do more harm than good.
+ */
+ return ret < 0 ? 0xffff : ret;
+}
+
+static int emac_mii_bus_write(struct mii_bus *bus, int addr,
+ int regnum, u16 val)
+{
+ emac_mdio_write(bus->priv, addr, regnum, val);
+ return 0;
+}
+
+static int emac_mii_bus_reset(struct mii_bus *bus)
+{
+ struct emac_instance *dev = netdev_priv(bus->priv);
+
+ return emac_reset(dev);
+}
+
+static int emac_mdio_setup_aneg(struct mii_phy *phy, u32 advertise)
+{
+ struct net_device *ndev = phy->dev;
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ dev->phy.autoneg = AUTONEG_ENABLE;
+ dev->phy.speed = SPEED_1000;
+ dev->phy.duplex = DUPLEX_FULL;
+ dev->phy.advertising = advertise;
+ phy->autoneg = AUTONEG_ENABLE;
+ phy->speed = dev->phy.speed;
+ phy->duplex = dev->phy.duplex;
+ phy->advertising = advertise;
+ return phy_start_aneg(dev->phy_dev);
+}
+
+static int emac_mdio_setup_forced(struct mii_phy *phy, int speed, int fd)
+{
+ struct net_device *ndev = phy->dev;
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ dev->phy.autoneg = AUTONEG_DISABLE;
+ dev->phy.speed = speed;
+ dev->phy.duplex = fd;
+ phy->autoneg = AUTONEG_DISABLE;
+ phy->speed = speed;
+ phy->duplex = fd;
+ return phy_start_aneg(dev->phy_dev);
+}
+
+static int emac_mdio_poll_link(struct mii_phy *phy)
+{
+ struct net_device *ndev = phy->dev;
+ struct emac_instance *dev = netdev_priv(ndev);
+ int res;
+
+ res = phy_read_status(dev->phy_dev);
+ if (res) {
+ dev_err(&dev->ofdev->dev, "link update failed (%d).", res);
+ return ethtool_op_get_link(ndev);
+ }
+
+ return dev->phy_dev->link;
+}
+
+static int emac_mdio_read_link(struct mii_phy *phy)
+{
+ struct net_device *ndev = phy->dev;
+ struct emac_instance *dev = netdev_priv(ndev);
+ int res;
+
+ res = phy_read_status(dev->phy_dev);
+ if (res)
+ return res;
+
+ dev->phy.speed = phy->speed;
+ dev->phy.duplex = phy->duplex;
+ dev->phy.pause = phy->pause;
+ dev->phy.asym_pause = phy->asym_pause;
+ return 0;
+}
+
+static int emac_mdio_init_phy(struct mii_phy *phy)
+{
+ struct net_device *ndev = phy->dev;
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ phy_start(dev->phy_dev);
+ dev->phy.autoneg = phy->autoneg;
+ dev->phy.speed = phy->speed;
+ dev->phy.duplex = phy->duplex;
+ dev->phy.advertising = phy->advertising;
+ dev->phy.pause = phy->pause;
+ dev->phy.asym_pause = phy->asym_pause;
+
+ return phy_init_hw(dev->phy_dev);
+}
+
+static const struct mii_phy_ops emac_dt_mdio_phy_ops = {
+ .init = emac_mdio_init_phy,
+ .setup_aneg = emac_mdio_setup_aneg,
+ .setup_forced = emac_mdio_setup_forced,
+ .poll_link = emac_mdio_poll_link,
+ .read_link = emac_mdio_read_link,
+};
+
+static int emac_dt_mdio_probe(struct emac_instance *dev)
+{
+ struct device_node *mii_np;
+ int res;
+
+ mii_np = of_get_child_by_name(dev->ofdev->dev.of_node, "mdio");
+ if (!mii_np) {
+ dev_err(&dev->ofdev->dev, "no mdio definition found.");
+ return -ENODEV;
+ }
+
+ if (!of_device_is_available(mii_np)) {
+ res = -ENODEV;
+ goto put_node;
+ }
+
+ dev->mii_bus = devm_mdiobus_alloc(&dev->ofdev->dev);
+ if (!dev->mii_bus) {
+ res = -ENOMEM;
+ goto put_node;
+ }
+
+ dev->mii_bus->priv = dev->ndev;
+ dev->mii_bus->parent = dev->ndev->dev.parent;
+ dev->mii_bus->name = "emac_mdio";
+ dev->mii_bus->read = &emac_mii_bus_read;
+ dev->mii_bus->write = &emac_mii_bus_write;
+ dev->mii_bus->reset = &emac_mii_bus_reset;
+ snprintf(dev->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev->ofdev->name);
+ res = of_mdiobus_register(dev->mii_bus, mii_np);
+ if (res) {
+ dev_err(&dev->ofdev->dev, "cannot register MDIO bus %s (%d)",
+ dev->mii_bus->name, res);
+ }
+
+ put_node:
+ of_node_put(mii_np);
+ return res;
+}
+
+static int emac_dt_phy_connect(struct emac_instance *dev,
+ struct device_node *phy_handle)
+{
+ int res;
+
+ dev->phy.def = devm_kzalloc(&dev->ofdev->dev, sizeof(*dev->phy.def),
+ GFP_KERNEL);
+ if (!dev->phy.def)
+ return -ENOMEM;
+
+ dev->phy_dev = of_phy_connect(dev->ndev, phy_handle, &emac_adjust_link,
+ 0, dev->phy_mode);
+ if (!dev->phy_dev) {
+ dev_err(&dev->ofdev->dev, "failed to connect to PHY.\n");
+ return -ENODEV;
+ }
+
+ dev->phy.def->phy_id = dev->phy_dev->drv->phy_id;
+ dev->phy.def->phy_id_mask = dev->phy_dev->drv->phy_id_mask;
+ dev->phy.def->name = dev->phy_dev->drv->name;
+ dev->phy.def->ops = &emac_dt_mdio_phy_ops;
+ dev->phy.features = dev->phy_dev->supported;
+ dev->phy.address = dev->phy_dev->mdio.addr;
+ dev->phy.mode = dev->phy_dev->interface;
+ return 0;
+}
+
+static int emac_dt_phy_probe(struct emac_instance *dev)
+{
+ struct device_node *np = dev->ofdev->dev.of_node;
+ struct device_node *phy_handle;
+ int res = 0;
+
+ phy_handle = of_parse_phandle(np, "phy-handle", 0);
+
+ if (phy_handle) {
+ res = emac_dt_mdio_probe(dev);
+ if (!res) {
+ res = emac_dt_phy_connect(dev, phy_handle);
+ if (res)
+ mdiobus_unregister(dev->mii_bus);
+ }
+ }
+
+ of_node_put(phy_handle);
+ return res;
+}
+
static int emac_init_phy(struct emac_instance *dev)
{
struct device_node *np = dev->ofdev->dev.of_node;
@@ -2430,15 +2644,12 @@ static int emac_init_phy(struct emac_instance *dev)
dev->phy.dev = ndev;
dev->phy.mode = dev->phy_mode;
- /* PHY-less configuration.
- * XXX I probably should move these settings to the dev tree
- */
- if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
+ /* PHY-less configuration. */
+ if ((dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) ||
+ of_phy_is_fixed_link(np)) {
emac_reset(dev);
- /* PHY-less configuration.
- * XXX I probably should move these settings to the dev tree
- */
+ /* PHY-less configuration. */
dev->phy.address = -1;
dev->phy.features = SUPPORTED_MII;
if (emac_phy_supports_gige(dev->phy_mode))
@@ -2447,6 +2658,16 @@ static int emac_init_phy(struct emac_instance *dev)
dev->phy.features |= SUPPORTED_100baseT_Full;
dev->phy.pause = 1;
+ if (of_phy_is_fixed_link(np)) {
+ int res = emac_dt_mdio_probe(dev);
+
+ if (!res) {
+ res = of_phy_register_fixed_link(np);
+ if (res)
+ mdiobus_unregister(dev->mii_bus);
+ }
+ return res;
+ }
return 0;
}
@@ -2490,6 +2711,18 @@ static int emac_init_phy(struct emac_instance *dev)
emac_configure(dev);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
+ int res = emac_dt_phy_probe(dev);
+
+ mutex_unlock(&emac_phy_map_lock);
+ if (!res)
+ goto init_phy;
+
+ dev_err(&dev->ofdev->dev, "failed to attach dt phy (%d).\n",
+ res);
+ return res;
+ }
+
if (dev->phy_address != 0xffffffff)
phy_map = ~(1 << dev->phy_address);
@@ -2517,6 +2750,7 @@ static int emac_init_phy(struct emac_instance *dev)
return -ENXIO;
}
+ init_phy:
/* Init PHY */
if (dev->phy.def->ops->init)
dev->phy.def->ops->init(&dev->phy);
@@ -2988,6 +3222,12 @@ static int emac_remove(struct platform_device *ofdev)
if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
zmii_detach(dev->zmii_dev, dev->zmii_port);
+ if (dev->phy_dev)
+ phy_disconnect(dev->phy_dev);
+
+ if (dev->mii_bus)
+ mdiobus_unregister(dev->mii_bus);
+
busy_phy_map &= ~(1 << dev->phy.address);
DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
diff --git a/drivers/net/ethernet/ibm/emac/core.h b/drivers/net/ethernet/ibm/emac/core.h
index 93ae11494810..0710a6685489 100644
--- a/drivers/net/ethernet/ibm/emac/core.h
+++ b/drivers/net/ethernet/ibm/emac/core.h
@@ -199,6 +199,10 @@ struct emac_instance {
struct emac_instance *mdio_instance;
struct mutex mdio_lock;
+ /* Device-tree based phy configuration */
+ struct mii_bus *mii_bus;
+ struct phy_device *phy_dev;
+
/* ZMII infos if any */
u32 zmii_ph;
u32 zmii_port;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-05 16:44:07 +0300