netdev/phy: Handle IEEE802.3 clause 45 Ethernet PHYs
The IEEE802.3 clause 45 MDIO bus protocol allows for directly
addressing PHY registers using a 21 bit address, and is used by many
10G Ethernet PHYS. Already existing is the ability of MDIO bus
drivers to use clause 45, with the MII_ADDR_C45 flag. Here we add
struct phy_c45_device_ids to hold the device identifier registers
present in clause 45. struct phy_device gets a couple of new fields:
c45_ids to hold the identifiers and is_c45 to signal that it is clause
45.
get_phy_device() gets a new parameter is_c45 to indicate that the PHY
device should use the clause 45 protocol, and its callers are adjusted
to pass false. The follow-on patch to of_mdio.c will pass true where
appropriate.
EXPORT phy_device_create() so that the follow-on patch to of_mdio.c
can use it to create phy devices for PHYs, that have non-standard
device identifier registers, based on the device tree bindings.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/phy.h b/include/linux/phy.h
index c291cae..597d05d 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -243,6 +243,15 @@
PHY_RESUMING
};
+/**
+ * struct phy_c45_device_ids - 802.3-c45 Device Identifiers
+ * @devices_in_package: Bit vector of devices present.
+ * @device_ids: The device identifer for each present device.
+ */
+struct phy_c45_device_ids {
+ u32 devices_in_package;
+ u32 device_ids[8];
+};
/* phy_device: An instance of a PHY
*
@@ -250,6 +259,8 @@
* bus: Pointer to the bus this PHY is on
* dev: driver model device structure for this PHY
* phy_id: UID for this device found during discovery
+ * c45_ids: 802.3-c45 Device Identifers if is_c45.
+ * is_c45: Set to true if this phy uses clause 45 addressing.
* state: state of the PHY for management purposes
* dev_flags: Device-specific flags used by the PHY driver.
* addr: Bus address of PHY
@@ -285,6 +296,9 @@
u32 phy_id;
+ struct phy_c45_device_ids c45_ids;
+ bool is_c45;
+
enum phy_state state;
u32 dev_flags;
@@ -480,7 +494,9 @@
return mdiobus_write(phydev->bus, phydev->addr, regnum, val);
}
-struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
+struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
+ bool is_c45, struct phy_c45_device_ids *c45_ids);
+struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
int phy_device_register(struct phy_device *phy);
int phy_init_hw(struct phy_device *phydev);
struct phy_device * phy_attach(struct net_device *dev,