leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net/ethoc: implement MDIO bus and support phylib

Browse Source 
Implement MDIO bus read/write functions, initialize the bus and scan for
the PHY when phylib is enabled. Limit PHY speeds to 10/100 Mbps.

Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Max Filippov 2016-08-05 18:26:21 +03:00 committed by Joe Hershberger
parent 59b7dfa0d1
commit 0d0779c141
1 changed files with 150 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

156
drivers/net/ethoc.c
View File

@ -18,6 +18,7 @@
#include <net.h>
#include <miiphy.h>
#include <asm/cache.h>
#include <wait_bit.h>
/* register offsets */
#define MODER 0x00
@ -181,6 +182,11 @@ struct ethoc {
void __iomem *iobase;
void __iomem *packet;
phys_addr_t packet_phys;
#ifdef CONFIG_PHYLIB
struct mii_dev *bus;
struct phy_device *phydev;
#endif
};
/**
@ -193,14 +199,19 @@ struct ethoc_bd {
u32 addr;
};
static inline u32 *ethoc_reg(struct ethoc *priv, size_t offset)
{
return priv->iobase + offset;
}
static inline u32 ethoc_read(struct ethoc *priv, size_t offset)
{
return readl(priv->iobase + offset);
return readl(ethoc_reg(priv, offset));
}
static inline void ethoc_write(struct ethoc *priv, size_t offset, u32 data)
{
writel(data, priv->iobase + offset);
writel(data, ethoc_reg(priv, offset));
}
static inline void ethoc_read_bd(struct ethoc *priv, int index,
@ -319,13 +330,31 @@ static int ethoc_reset(struct ethoc *priv)
static int ethoc_init_common(struct ethoc *priv)
{
int ret = 0;
priv->num_tx = 1;
priv->num_rx = PKTBUFSRX;
ethoc_write(priv, TX_BD_NUM, priv->num_tx);
ethoc_init_ring(priv);
ethoc_reset(priv);
return 0;
#ifdef CONFIG_PHYLIB
ret = phy_startup(priv->phydev);
if (ret) {
printf("Could not initialize PHY %s\n",
priv->phydev->dev->name);
return ret;
}
#endif
return ret;
}
static void ethoc_stop_common(struct ethoc *priv)
{
ethoc_disable_rx_and_tx(priv);
#ifdef CONFIG_PHYLIB
phy_shutdown(priv->phydev);
#endif
}
static int ethoc_update_rx_stats(struct ethoc_bd *bd)
@ -509,6 +538,110 @@ static int ethoc_free_pkt_common(struct ethoc *priv)
return 0;
}
#ifdef CONFIG_PHYLIB
static int ethoc_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
{
struct ethoc *priv = bus->priv;
int rc;
ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(addr, reg));
ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ);
rc = wait_for_bit(__func__, ethoc_reg(priv, MIISTATUS),
MIISTATUS_BUSY, false, CONFIG_SYS_HZ, false);
if (rc == 0) {
u32 data = ethoc_read(priv, MIIRX_DATA);
/* reset MII command register */
ethoc_write(priv, MIICOMMAND, 0);
return data;
}
return rc;
}
static int ethoc_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
u16 val)
{
struct ethoc *priv = bus->priv;
int rc;
ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(addr, reg));
ethoc_write(priv, MIITX_DATA, val);
ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE);
rc = wait_for_bit(__func__, ethoc_reg(priv, MIISTATUS),
MIISTATUS_BUSY, false, CONFIG_SYS_HZ, false);
if (rc == 0) {
/* reset MII command register */
ethoc_write(priv, MIICOMMAND, 0);
}
return rc;
}
static int ethoc_mdio_init(const char *name, struct ethoc *priv)
{
struct mii_dev *bus = mdio_alloc();
int ret;
if (!bus) {
printf("Failed to allocate MDIO bus\n");
return -ENOMEM;
}
bus->read = ethoc_mdio_read;
bus->write = ethoc_mdio_write;
snprintf(bus->name, sizeof(bus->name), "%s", name);
bus->priv = priv;
ret = mdio_register(bus);
if (ret < 0)
return ret;
priv->bus = miiphy_get_dev_by_name(name);
return 0;
}
static int ethoc_phy_init(struct ethoc *priv, void *dev)
{
struct phy_device *phydev;
int mask = 0xffffffff;
#ifdef CONFIG_PHY_ADDR
mask = 1 << CONFIG_PHY_ADDR;
#endif
phydev = phy_find_by_mask(priv->bus, mask, PHY_INTERFACE_MODE_MII);
if (!phydev)
return -ENODEV;
phy_connect_dev(phydev, dev);
phydev->supported &= PHY_BASIC_FEATURES;
phydev->advertising = phydev->supported;
priv->phydev = phydev;
phy_config(phydev);
return 0;
}
#else
static inline int ethoc_mdio_init(const char *name, struct ethoc *priv)
{
return 0;
}
static inline int ethoc_phy_init(struct ethoc *priv, void *dev)
{
return 0;
}
#endif
#ifdef CONFIG_DM_ETH
static int ethoc_write_hwaddr(struct udevice *dev)
@ -548,9 +681,7 @@ static int ethoc_start(struct udevice *dev)
static void ethoc_stop(struct udevice *dev)
{
struct ethoc *priv = dev_get_priv(dev);
ethoc_disable_rx_and_tx(priv);
ethoc_stop_common(dev_get_priv(dev));
}
static int ethoc_ofdata_to_platdata(struct udevice *dev)
@ -576,6 +707,10 @@ static int ethoc_probe(struct udevice *dev)
priv->packet = ioremap(pdata->packet_base,
(1 + PKTBUFSRX) * PKTSIZE_ALIGN);
}
ethoc_mdio_init(dev->name, priv);
ethoc_phy_init(priv, dev);
return 0;
}
@ -583,6 +718,11 @@ static int ethoc_remove(struct udevice *dev)
{
struct ethoc *priv = dev_get_priv(dev);
#ifdef CONFIG_PHYLIB
free(priv->phydev);
mdio_unregister(priv->bus);
mdio_free(priv->bus);
#endif
iounmap(priv->iobase);
return 0;
}
@ -687,6 +827,10 @@ int ethoc_initialize(u8 dev_num, int base_addr)
priv->iobase = ioremap(dev->iobase, ETHOC_IOSIZE);
eth_register(dev);
ethoc_mdio_init(dev->name, priv);
ethoc_phy_init(priv, dev);
return 1;
}