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generic: ar8216: add sanity check to ar8216_probe 

Verify that the mdio bus has PHY devices with
a supported PHY ID at address 0-4.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 35537
lede-17.01
Gabor Juhos 2013-02-10 13:05:14 +00:00
parent 4720c75cf7
commit 774da6c7a4
1 changed files with 41 additions and 0 deletions
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41
target/linux/generic/files/drivers/net/phy/ar8216.c
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@ -1956,6 +1956,44 @@ ar8216_config_aneg(struct phy_device *phydev)
return genphy_config_aneg(phydev);
}
static const u32 ar8xxx_phy_ids[] = {
0x004dd033,
0x004dd041,
0x004dd042,
};
static bool
ar8xxx_phy_match(u32 phy_id)
{
int i;
for (i = 0; i < ARRAY_SIZE(ar8xxx_phy_ids); i++)
if (phy_id == ar8xxx_phy_ids[i])
return true;
return false;
}
static bool
ar8xxx_is_possible(struct mii_bus *bus)
{
unsigned i;
for (i = 0; i < 4; i++) {
u32 phy_id;
phy_id = mdiobus_read(bus, i, MII_PHYSID1) << 16;
phy_id |= mdiobus_read(bus, i, MII_PHYSID2);
if (!ar8xxx_phy_match(phy_id)) {
pr_debug("ar8xxx: unknown PHY at %s:%02x id:%08x\n",
dev_name(&bus->dev), i, phy_id);
return false;
}
}
return true;
}
static int
ar8216_probe(struct phy_device *pdev)
{
@ -1966,6 +2004,9 @@ ar8216_probe(struct phy_device *pdev)
if (pdev->addr != 0 && pdev->addr != 4)
return -ENODEV;
if (!ar8xxx_is_possible(pdev->bus))
return -ENODEV;
priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;