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authorGabor Juhos <juhosg@openwrt.org>2012-02-11 16:49:56 +0000
committerGabor Juhos <juhosg@openwrt.org>2012-02-11 16:49:56 +0000
commit4e1b870f3e6e9b8caca2be7ff45e3677f4054f2f (patch)
tree1d6f8d20b56af88daaade5417045e30acd7eaaf4
parent0ace4636dba140db5ecf1cadb985982378be41dc (diff)
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ramips: add MDIO bus support for RT288X
SVN-Revision: 30455
-rw-r--r--target/linux/ramips/files/drivers/net/ramips.c152
-rw-r--r--target/linux/ramips/files/drivers/net/ramips_eth.h4
2 files changed, 154 insertions, 2 deletions
diff --git a/target/linux/ramips/files/drivers/net/ramips.c b/target/linux/ramips/files/drivers/net/ramips.c
index 5d9d9f3b48..302942a620 100644
--- a/target/linux/ramips/files/drivers/net/ramips.c
+++ b/target/linux/ramips/files/drivers/net/ramips.c
@@ -24,6 +24,7 @@
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/platform_device.h>
+#include <linux/phy.h>
#include <ramips_eth_platform.h>
#include "ramips_eth.h"
@@ -88,6 +89,9 @@ ramips_hw_set_macaddr(unsigned char *mac)
}
#ifdef CONFIG_RALINK_RT288X
+
+#define RAMIPS_MDIO_RETRY 1000
+
static void
ramips_setup_mdio_cfg(struct raeth_priv *re)
{
@@ -122,8 +126,140 @@ ramips_setup_mdio_cfg(struct raeth_priv *re)
ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG);
}
+static int
+ramips_mdio_wait_ready(struct raeth_priv *re)
+{
+ int retries;
+
+ retries = RAMIPS_MDIO_RETRY;
+ while (1) {
+ u32 t;
+
+ t = ramips_fe_rr(RAMIPS_MDIO_ACCESS);
+ if ((t & (0x1 << 31)) == 0)
+ return 0;
+
+ if (retries-- == 0)
+ break;
+
+ udelay(1);
+ }
+
+ dev_err(re->parent, "MDIO operation timed out\n");
+ return -ETIMEDOUT;
+}
+
+static int
+ramips_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
+{
+ struct raeth_priv *re = bus->priv;
+ int err;
+ u32 t;
+
+ err = ramips_mdio_wait_ready(re);
+ if (err)
+ return 0xffff;
+
+ t = (phy_addr << 24) | (phy_reg << 16);
+ ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
+ t |= (1 << 31);
+ ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
+
+ err = ramips_mdio_wait_ready(re);
+ if (err)
+ return 0xffff;
+
+ RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
+ phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
+
+ return ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff;
+}
+
+static int
+ramips_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)
+{
+ struct raeth_priv *re = bus->priv;
+ int err;
+ u32 t;
+
+ RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
+ phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
+
+ err = ramips_mdio_wait_ready(re);
+ if (err)
+ return err;
+
+ t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val;
+ ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
+ t |= (1 << 31);
+ ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
+
+ return ramips_mdio_wait_ready(re);
+}
+
+static int
+ramips_mdio_reset(struct mii_bus *bus)
+{
+ /* TODO */
+ return 0;
+}
+
+static int
+ramips_mdio_init(struct raeth_priv *re)
+{
+ int err;
+ int i;
+
+ re->mii_bus = mdiobus_alloc();
+ if (re->mii_bus == NULL)
+ return -ENOMEM;
+
+ re->mii_bus->name = "ramips_mdio";
+ re->mii_bus->read = ramips_mdio_read;
+ re->mii_bus->write = ramips_mdio_write;
+ re->mii_bus->reset = ramips_mdio_reset;
+ re->mii_bus->irq = re->mii_irq;
+ re->mii_bus->priv = re;
+ re->mii_bus->parent = re->parent;
+
+ snprintf(re->mii_bus->id, MII_BUS_ID_SIZE, "%s", "ramips_mdio");
+ re->mii_bus->phy_mask = 0;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ re->mii_irq[i] = PHY_POLL;
+
+ err = mdiobus_register(re->mii_bus);
+ if (err)
+ goto err_free_bus;
+
+ return 0;
+
+err_free_bus:
+ kfree(re->mii_bus);
+ return err;
+}
+
+static void
+ramips_mdio_cleanup(struct raeth_priv *re)
+{
+ mdiobus_unregister(re->mii_bus);
+ kfree(re->mii_bus);
+}
+
#else
-static inline void ramips_setup_mdio_cfg(struct raeth_priv *re)
+static inline void
+ramips_setup_mdio_cfg(struct raeth_priv *re)
+{
+}
+
+static inline int
+ramips_mdio_init(struct raeth_priv *re)
+{
+ return 0;
+}
+
+static inline void
+ramips_mdio_cleanup(struct raeth_priv *re)
{
}
#endif /* CONFIG_RALINK_RT288X */
@@ -457,6 +593,7 @@ static int __init
ramips_eth_probe(struct net_device *dev)
{
struct raeth_priv *priv = netdev_priv(dev);
+ int err;
BUG_ON(!priv->plat->reset_fe);
priv->plat->reset_fe();
@@ -468,11 +605,21 @@ ramips_eth_probe(struct net_device *dev)
dev->watchdog_timeo = TX_TIMEOUT;
spin_lock_init(&priv->page_lock);
- return 0;
+ err = ramips_mdio_init(priv);
+ return err;
+}
+
+static void
+ramips_eth_uninit(struct net_device *dev)
+{
+ struct raeth_priv *re = netdev_priv(dev);
+
+ ramips_mdio_cleanup(re);
}
static const struct net_device_ops ramips_eth_netdev_ops = {
.ndo_init = ramips_eth_probe,
+ .ndo_uninit = ramips_eth_uninit,
.ndo_open = ramips_eth_open,
.ndo_stop = ramips_eth_stop,
.ndo_start_xmit = ramips_eth_hard_start_xmit,
@@ -526,6 +673,7 @@ ramips_eth_plat_probe(struct platform_device *plat)
priv = netdev_priv(ramips_dev);
priv->netdev = ramips_dev;
+ priv->parent = &plat->dev;
priv->speed = data->speed;
priv->duplex = data->duplex;
priv->rx_fc = data->rx_fc;
diff --git a/target/linux/ramips/files/drivers/net/ramips_eth.h b/target/linux/ramips/files/drivers/net/ramips_eth.h
index 87e67a581e..4927f2a211 100644
--- a/target/linux/ramips/files/drivers/net/ramips_eth.h
+++ b/target/linux/ramips/files/drivers/net/ramips_eth.h
@@ -230,12 +230,16 @@ struct raeth_priv
spinlock_t page_lock;
struct net_device *netdev;
+ struct device *parent;
struct ramips_eth_platform_data *plat;
int speed;
int duplex;
int tx_fc;
int rx_fc;
+
+ struct mii_bus *mii_bus;
+ int mii_irq[PHY_MAX_ADDR];
};
#endif /* RAMIPS_ETH_H */