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drivers/net/ethoc: add mdio bus support 

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Franck Jullien 2014-05-14 18:59:29 +02:00 committed by Sascha Hauer
parent 26576f8ef5
commit b4ce62d3d2
2 changed files with 58 additions and 0 deletions
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1
drivers/net/Kconfig
View File

@ -80,6 +80,7 @@ config DRIVER_NET_EP93XX
config DRIVER_NET_ETHOC
bool "OpenCores ethernet MAC driver"
select PHYLIB
help
This option enables support for the OpenCores 10/100 Mbps
Ethernet MAC core.

57
drivers/net/ethoc.c
View File

@ -178,6 +178,8 @@ struct ethoc {
u32 num_rx;
u32 cur_rx;
struct mii_bus miibus;
};
/**
@ -481,6 +483,54 @@ static int ethoc_send_packet(struct eth_device *edev, void *packet, int length)
return 0;
}
static int ethoc_mdio_read(struct mii_bus *bus, int phy, int reg)
{
struct ethoc *priv = bus->priv;
u64 start;
u32 data;
ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg));
ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ);
start = get_time_ns();
while (ethoc_read(priv, MIISTATUS) & MIISTATUS_BUSY) {
if (is_timeout(start, 2 * MSECOND)) {
dev_err(bus->parent, "PHY command timeout\n");
return -EBUSY;
}
}
data = ethoc_read(priv, MIIRX_DATA);
/* reset MII command register */
ethoc_write(priv, MIICOMMAND, 0);
return data;
}
static int ethoc_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
{
struct ethoc *priv = bus->priv;
u64 start;
ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg));
ethoc_write(priv, MIITX_DATA, val);
ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE);
start = get_time_ns();
while (ethoc_read(priv, MIISTATUS) & MIISTATUS_BUSY) {
if (is_timeout(start, 2 * MSECOND)) {
dev_err(bus->parent, "PHY command timeout\n");
return -EBUSY;
}
}
/* reset MII command register */
ethoc_write(priv, MIICOMMAND, 0);
return 0;
}
static int ethoc_probe(struct device_d *dev)
{
struct eth_device *edev;
@ -493,6 +543,11 @@ static int ethoc_probe(struct device_d *dev)
priv = edev->priv;
priv->iobase = dev_request_mem_region(dev, 0);
priv->miibus.read = ethoc_mdio_read;
priv->miibus.write = ethoc_mdio_write;
priv->miibus.priv = priv;
priv->miibus.parent = dev;
edev->init = ethoc_init_dev;
edev->open = ethoc_open;
edev->send = ethoc_send_packet;
@ -503,6 +558,8 @@ static int ethoc_probe(struct device_d *dev)
edev->set_ethaddr = ethoc_set_ethaddr;
edev->parent = dev;
mdiobus_register(&priv->miibus);
eth_register(edev);
return 0;