ramips: add MDIO bus support for RT288X

SVN-Revision: 30455
This commit is contained in:
Gabor Juhos 2012-02-11 16:49:56 +00:00
parent 0ace4636db
commit 4e1b870f3e
2 changed files with 154 additions and 2 deletions

View file

@ -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;

View file

@ -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 */