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d0781c95bc
The DSA (Distributed Switch Architecture) implementation has made a
design decision when it got introduced to the Linux kernel in 2008.
That was to hide away from the user the CPU-facing Ethernet MAC, since
it does not make sense to register it as a struct net_device (UCLASS_ETH
udevice for U-Boot), because that would never be beneficial for a user:
they would not be able to use it for traffic, since conceptually, a
packet delivered to the CPU port should loop back into the system.
Nonetheless, DSA has had numerous growing pains due to the lack of a
struct net_device for the CPU port, but so far it has overcome them.
It is unlikely at this stage of maturity that this aspect of it will
change.
We would like U-Boot to present the same information as Linux, to be at
parity in terms of number of interfaces, so that ethNaddr environment
variables could directly be associated between U-Boot and Linux.
Therefore, we would implicitly like U-Boot to hide the CPU port from the
user as well.
But the paradox is that DSA still needs a struct phy_device to inform
the driver of the parameters of the link that it should configure the
CPU port to. The problem is that the phy_device is typically returned
via a call to phy_connect, which needs an udevice to attach the PHY to,
and to search its ofnode for the 'fixed-link' property. But we don't
have an udevice to present for the CPU port.
Since 99% of DSA setups are MAC-to-MAC connections between the switch
and the host Ethernet controller, the struct phy_device is going to be a
fixed PHY. This simplifies things quite a bit. In U-Boot, a fixed PHY
does not need an MDIO bus, and does not need an attached dev either.
Basically, the phy_connect call doesn't do any connection, it just
creates the fixed PHY.
The proposal of this patch is to introduce a new fixed_phy_create
function which will take a single argument: the ofnode that holds this:
port@4 {
reg = <4>;
phy-mode = "internal";
fixed-link {
speed = <2500>;
full-duplex;
};
};
and probe a fixed PHY driver using the information from this ofnode.
DSA will probably be the only user of this function.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
579 lines
16 KiB
C
579 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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* Andy Fleming <afleming@gmail.com>
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*
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* This file pretty much stolen from Linux's mii.h/ethtool.h/phy.h
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*/
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#ifndef _PHY_H
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#define _PHY_H
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#include <log.h>
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#include <phy_interface.h>
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#include <dm/ofnode.h>
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#include <dm/read.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/mdio.h>
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struct udevice;
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#define PHY_FIXED_ID 0xa5a55a5a
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#define PHY_NCSI_ID 0xbeefcafe
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/*
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* There is no actual id for this.
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* This is just a dummy id for gmii2rgmmi converter.
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*/
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#define PHY_GMII2RGMII_ID 0x5a5a5a5a
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#define PHY_MAX_ADDR 32
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#define PHY_FLAG_BROKEN_RESET (1 << 0) /* soft reset not supported */
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#define PHY_DEFAULT_FEATURES (SUPPORTED_Autoneg | \
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SUPPORTED_TP | \
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SUPPORTED_MII)
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#define PHY_10BT_FEATURES (SUPPORTED_10baseT_Half | \
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SUPPORTED_10baseT_Full)
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#define PHY_100BT_FEATURES (SUPPORTED_100baseT_Half | \
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SUPPORTED_100baseT_Full)
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#define PHY_1000BT_FEATURES (SUPPORTED_1000baseT_Half | \
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SUPPORTED_1000baseT_Full)
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#define PHY_BASIC_FEATURES (PHY_10BT_FEATURES | \
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PHY_100BT_FEATURES | \
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PHY_DEFAULT_FEATURES)
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#define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES | \
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PHY_1000BT_FEATURES)
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#define PHY_10G_FEATURES (PHY_GBIT_FEATURES | \
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SUPPORTED_10000baseT_Full)
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#ifndef PHY_ANEG_TIMEOUT
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#define PHY_ANEG_TIMEOUT 4000
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#endif
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struct phy_device;
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#define MDIO_NAME_LEN 32
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struct mii_dev {
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struct list_head link;
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char name[MDIO_NAME_LEN];
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void *priv;
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int (*read)(struct mii_dev *bus, int addr, int devad, int reg);
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int (*write)(struct mii_dev *bus, int addr, int devad, int reg,
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u16 val);
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int (*reset)(struct mii_dev *bus);
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struct phy_device *phymap[PHY_MAX_ADDR];
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u32 phy_mask;
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};
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/* struct phy_driver: a structure which defines PHY behavior
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*
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* uid will contain a number which represents the PHY. During
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* startup, the driver will poll the PHY to find out what its
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* UID--as defined by registers 2 and 3--is. The 32-bit result
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* gotten from the PHY will be masked to
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* discard any bits which may change based on revision numbers
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* unimportant to functionality
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*
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*/
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struct phy_driver {
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char *name;
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unsigned int uid;
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unsigned int mask;
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unsigned int mmds;
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u32 features;
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/* Called to do any driver startup necessities */
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/* Will be called during phy_connect */
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int (*probe)(struct phy_device *phydev);
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/* Called to configure the PHY, and modify the controller
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* based on the results. Should be called after phy_connect */
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int (*config)(struct phy_device *phydev);
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/* Called when starting up the controller */
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int (*startup)(struct phy_device *phydev);
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/* Called when bringing down the controller */
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int (*shutdown)(struct phy_device *phydev);
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int (*readext)(struct phy_device *phydev, int addr, int devad, int reg);
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int (*writeext)(struct phy_device *phydev, int addr, int devad, int reg,
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u16 val);
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/* Phy specific driver override for reading a MMD register */
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int (*read_mmd)(struct phy_device *phydev, int devad, int reg);
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/* Phy specific driver override for writing a MMD register */
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int (*write_mmd)(struct phy_device *phydev, int devad, int reg,
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u16 val);
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struct list_head list;
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/* driver private data */
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ulong data;
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};
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struct phy_device {
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/* Information about the PHY type */
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/* And management functions */
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struct mii_dev *bus;
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struct phy_driver *drv;
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void *priv;
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#ifdef CONFIG_DM_ETH
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struct udevice *dev;
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ofnode node;
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#else
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struct eth_device *dev;
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#endif
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/* forced speed & duplex (no autoneg)
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* partner speed & duplex & pause (autoneg)
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*/
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int speed;
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int duplex;
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/* The most recently read link state */
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int link;
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int port;
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phy_interface_t interface;
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u32 advertising;
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u32 supported;
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u32 mmds;
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int autoneg;
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int addr;
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int pause;
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int asym_pause;
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u32 phy_id;
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bool is_c45;
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u32 flags;
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};
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struct fixed_link {
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int phy_id;
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int duplex;
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int link_speed;
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int pause;
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int asym_pause;
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};
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/**
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* phy_read - Convenience function for reading a given PHY register
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* @phydev: the phy_device struct
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* @devad: The MMD to read from
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* @regnum: register number to read
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* @return: value for success or negative errno for failure
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*/
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static inline int phy_read(struct phy_device *phydev, int devad, int regnum)
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{
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struct mii_dev *bus = phydev->bus;
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if (!bus || !bus->read) {
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debug("%s: No bus configured\n", __func__);
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return -1;
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}
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return bus->read(bus, phydev->addr, devad, regnum);
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}
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/**
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* phy_write - Convenience function for writing a given PHY register
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* @phydev: the phy_device struct
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* @devad: The MMD to read from
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* @regnum: register number to write
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* @val: value to write to @regnum
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* @return: 0 for success or negative errno for failure
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*/
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static inline int phy_write(struct phy_device *phydev, int devad, int regnum,
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u16 val)
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{
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struct mii_dev *bus = phydev->bus;
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if (!bus || !bus->write) {
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debug("%s: No bus configured\n", __func__);
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return -1;
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}
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return bus->write(bus, phydev->addr, devad, regnum, val);
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}
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/**
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* phy_mmd_start_indirect - Convenience function for writing MMD registers
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* @phydev: the phy_device struct
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* @devad: The MMD to read from
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* @regnum: register number to write
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* @return: None
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*/
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static inline void phy_mmd_start_indirect(struct phy_device *phydev, int devad,
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int regnum)
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{
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/* Write the desired MMD Devad */
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phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_CTRL, devad);
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/* Write the desired MMD register address */
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phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_DATA, regnum);
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/* Select the Function : DATA with no post increment */
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phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_CTRL,
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(devad | MII_MMD_CTRL_NOINCR));
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}
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/**
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* phy_read_mmd - Convenience function for reading a register
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* from an MMD on a given PHY.
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* @phydev: The phy_device struct
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* @devad: The MMD to read from
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* @regnum: The register on the MMD to read
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* @return: Value for success or negative errno for failure
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*/
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static inline int phy_read_mmd(struct phy_device *phydev, int devad,
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int regnum)
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{
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struct phy_driver *drv = phydev->drv;
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if (regnum > (u16)~0 || devad > 32)
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return -EINVAL;
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/* driver-specific access */
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if (drv->read_mmd)
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return drv->read_mmd(phydev, devad, regnum);
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/* direct C45 / C22 access */
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if ((drv->features & PHY_10G_FEATURES) == PHY_10G_FEATURES ||
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devad == MDIO_DEVAD_NONE || !devad)
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return phy_read(phydev, devad, regnum);
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/* indirect C22 access */
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phy_mmd_start_indirect(phydev, devad, regnum);
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/* Read the content of the MMD's selected register */
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return phy_read(phydev, MDIO_DEVAD_NONE, MII_MMD_DATA);
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}
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/**
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* phy_write_mmd - Convenience function for writing a register
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* on an MMD on a given PHY.
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* @phydev: The phy_device struct
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* @devad: The MMD to read from
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* @regnum: The register on the MMD to read
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* @val: value to write to @regnum
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* @return: 0 for success or negative errno for failure
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*/
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static inline int phy_write_mmd(struct phy_device *phydev, int devad,
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int regnum, u16 val)
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{
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struct phy_driver *drv = phydev->drv;
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if (regnum > (u16)~0 || devad > 32)
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return -EINVAL;
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/* driver-specific access */
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if (drv->write_mmd)
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return drv->write_mmd(phydev, devad, regnum, val);
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/* direct C45 / C22 access */
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if ((drv->features & PHY_10G_FEATURES) == PHY_10G_FEATURES ||
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devad == MDIO_DEVAD_NONE || !devad)
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return phy_write(phydev, devad, regnum, val);
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/* indirect C22 access */
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phy_mmd_start_indirect(phydev, devad, regnum);
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/* Write the data into MMD's selected register */
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return phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_DATA, val);
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}
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/**
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* phy_set_bits_mmd - Convenience function for setting bits in a register
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* on MMD
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* @phydev: the phy_device struct
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* @devad: the MMD containing register to modify
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* @regnum: register number to modify
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* @val: bits to set
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* @return: 0 for success or negative errno for failure
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*/
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static inline int phy_set_bits_mmd(struct phy_device *phydev, int devad,
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u32 regnum, u16 val)
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{
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int value, ret;
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value = phy_read_mmd(phydev, devad, regnum);
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if (value < 0)
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return value;
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value |= val;
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ret = phy_write_mmd(phydev, devad, regnum, value);
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if (ret < 0)
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return ret;
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return 0;
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}
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/**
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* phy_clear_bits_mmd - Convenience function for clearing bits in a register
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* on MMD
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* @phydev: the phy_device struct
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* @devad: the MMD containing register to modify
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* @regnum: register number to modify
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* @val: bits to clear
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* @return: 0 for success or negative errno for failure
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*/
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static inline int phy_clear_bits_mmd(struct phy_device *phydev, int devad,
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u32 regnum, u16 val)
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{
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int value, ret;
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value = phy_read_mmd(phydev, devad, regnum);
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if (value < 0)
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return value;
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value &= ~val;
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ret = phy_write_mmd(phydev, devad, regnum, value);
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if (ret < 0)
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return ret;
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return 0;
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}
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#ifdef CONFIG_PHYLIB_10G
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extern struct phy_driver gen10g_driver;
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/*
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* List all 10G interfaces here, the assumption being that PHYs on these
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* interfaces are C45
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*/
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static inline int is_10g_interface(phy_interface_t interface)
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{
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return interface == PHY_INTERFACE_MODE_XGMII ||
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interface == PHY_INTERFACE_MODE_USXGMII ||
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interface == PHY_INTERFACE_MODE_XFI;
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}
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#endif
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/**
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* phy_init() - Initializes the PHY drivers
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* This function registers all available PHY drivers
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*
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* @return: 0 if OK, -ve on error
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*/
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int phy_init(void);
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/**
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* phy_reset() - Resets the specified PHY
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* Issues a reset of the PHY and waits for it to complete
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*
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* @phydev: PHY to reset
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* @return: 0 if OK, -ve on error
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*/
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int phy_reset(struct phy_device *phydev);
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/**
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* phy_find_by_mask() - Searches for a PHY on the specified MDIO bus
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* The function checks the PHY addresses flagged in phy_mask and returns a
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* phy_device pointer if it detects a PHY.
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* This function should only be called if just one PHY is expected to be present
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* in the set of addresses flagged in phy_mask. If multiple PHYs are present,
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* it is undefined which of these PHYs is returned.
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*
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* @bus: MII/MDIO bus to scan
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* @phy_mask: bitmap of PYH addresses to scan
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* @interface: type of MAC-PHY interface
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* @return: pointer to phy_device if a PHY is found, or NULL otherwise
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*/
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struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
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phy_interface_t interface);
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#ifdef CONFIG_PHY_FIXED
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/**
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* fixed_phy_create() - create an unconnected fixed-link pseudo-PHY device
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* @node: OF node for the container of the fixed-link node
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*
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* Description: Creates a struct phy_device based on a fixed-link of_node
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* description. Can be used without phy_connect by drivers which do not expose
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* a UCLASS_ETH udevice.
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*/
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struct phy_device *fixed_phy_create(ofnode node);
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#else
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static inline struct phy_device *fixed_phy_create(ofnode node)
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{
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return NULL;
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}
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#endif
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#ifdef CONFIG_DM_ETH
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/**
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* phy_connect_dev() - Associates the given pair of PHY and Ethernet devices
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* @phydev: PHY device
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* @dev: Ethernet device
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*/
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void phy_connect_dev(struct phy_device *phydev, struct udevice *dev);
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/**
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* phy_connect() - Creates a PHY device for the Ethernet interface
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* Creates a PHY device for the PHY at the given address, if one doesn't exist
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* already, and associates it with the Ethernet device.
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* The function may be called with addr <= 0, in this case addr value is ignored
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* and the bus is scanned to detect a PHY. Scanning should only be used if only
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* one PHY is expected to be present on the MDIO bus, otherwise it is undefined
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* which PHY is returned.
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*
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* @bus: MII/MDIO bus that hosts the PHY
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* @addr: PHY address on MDIO bus
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* @dev: Ethernet device to associate to the PHY
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* @interface: type of MAC-PHY interface
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* @return: pointer to phy_device if a PHY is found, or NULL otherwise
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*/
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struct phy_device *phy_connect(struct mii_dev *bus, int addr,
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struct udevice *dev,
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phy_interface_t interface);
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static inline ofnode phy_get_ofnode(struct phy_device *phydev)
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{
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if (ofnode_valid(phydev->node))
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return phydev->node;
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else
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return dev_ofnode(phydev->dev);
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}
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#else
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/**
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* phy_connect_dev() - Associates the given pair of PHY and Ethernet devices
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* @phydev: PHY device
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* @dev: Ethernet device
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*/
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void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev);
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/**
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* phy_connect() - Creates a PHY device for the Ethernet interface
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* Creates a PHY device for the PHY at the given address, if one doesn't exist
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* already, and associates it with the Ethernet device.
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* The function may be called with addr <= 0, in this case addr value is ignored
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* and the bus is scanned to detect a PHY. Scanning should only be used if only
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* one PHY is expected to be present on the MDIO bus, otherwise it is undefined
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* which PHY is returned.
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*
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* @bus: MII/MDIO bus that hosts the PHY
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* @addr: PHY address on MDIO bus
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* @dev: Ethernet device to associate to the PHY
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* @interface: type of MAC-PHY interface
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* @return: pointer to phy_device if a PHY is found, or NULL otherwise
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|
*/
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struct phy_device *phy_connect(struct mii_dev *bus, int addr,
|
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struct eth_device *dev,
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|
phy_interface_t interface);
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|
|
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static inline ofnode phy_get_ofnode(struct phy_device *phydev)
|
|
{
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return ofnode_null();
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|
}
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#endif
|
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int phy_startup(struct phy_device *phydev);
|
|
int phy_config(struct phy_device *phydev);
|
|
int phy_shutdown(struct phy_device *phydev);
|
|
int phy_register(struct phy_driver *drv);
|
|
int phy_set_supported(struct phy_device *phydev, u32 max_speed);
|
|
int genphy_config_aneg(struct phy_device *phydev);
|
|
int genphy_restart_aneg(struct phy_device *phydev);
|
|
int genphy_update_link(struct phy_device *phydev);
|
|
int genphy_parse_link(struct phy_device *phydev);
|
|
int genphy_config(struct phy_device *phydev);
|
|
int genphy_startup(struct phy_device *phydev);
|
|
int genphy_shutdown(struct phy_device *phydev);
|
|
int gen10g_config(struct phy_device *phydev);
|
|
int gen10g_startup(struct phy_device *phydev);
|
|
int gen10g_shutdown(struct phy_device *phydev);
|
|
int gen10g_discover_mmds(struct phy_device *phydev);
|
|
|
|
int phy_b53_init(void);
|
|
int phy_mv88e61xx_init(void);
|
|
int phy_aquantia_init(void);
|
|
int phy_atheros_init(void);
|
|
int phy_broadcom_init(void);
|
|
int phy_cortina_init(void);
|
|
int phy_cortina_access_init(void);
|
|
int phy_davicom_init(void);
|
|
int phy_et1011c_init(void);
|
|
int phy_lxt_init(void);
|
|
int phy_marvell_init(void);
|
|
int phy_micrel_ksz8xxx_init(void);
|
|
int phy_micrel_ksz90x1_init(void);
|
|
int phy_meson_gxl_init(void);
|
|
int phy_natsemi_init(void);
|
|
int phy_realtek_init(void);
|
|
int phy_smsc_init(void);
|
|
int phy_teranetics_init(void);
|
|
int phy_ti_init(void);
|
|
int phy_vitesse_init(void);
|
|
int phy_xilinx_init(void);
|
|
int phy_mscc_init(void);
|
|
int phy_fixed_init(void);
|
|
int phy_ncsi_init(void);
|
|
int phy_xilinx_gmii2rgmii_init(void);
|
|
|
|
int board_phy_config(struct phy_device *phydev);
|
|
int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id);
|
|
|
|
/**
|
|
* phy_get_interface_by_name() - Look up a PHY interface name
|
|
*
|
|
* @str: PHY interface name, e.g. "mii"
|
|
* @return: PHY_INTERFACE_MODE_... value, or -1 if not found
|
|
*/
|
|
int phy_get_interface_by_name(const char *str);
|
|
|
|
/**
|
|
* phy_interface_is_rgmii - Convenience function for testing if a PHY interface
|
|
* is RGMII (all variants)
|
|
* @phydev: the phy_device struct
|
|
* @return: true if MII bus is RGMII or false if it is not
|
|
*/
|
|
static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
|
|
{
|
|
return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
|
|
phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
|
|
}
|
|
|
|
/**
|
|
* phy_interface_is_sgmii - Convenience function for testing if a PHY interface
|
|
* is SGMII (all variants)
|
|
* @phydev: the phy_device struct
|
|
* @return: true if MII bus is SGMII or false if it is not
|
|
*/
|
|
static inline bool phy_interface_is_sgmii(struct phy_device *phydev)
|
|
{
|
|
return phydev->interface >= PHY_INTERFACE_MODE_SGMII &&
|
|
phydev->interface <= PHY_INTERFACE_MODE_QSGMII;
|
|
}
|
|
|
|
/* PHY UIDs for various PHYs that are referenced in external code */
|
|
#define PHY_UID_CS4340 0x13e51002
|
|
#define PHY_UID_CS4223 0x03e57003
|
|
#define PHY_UID_TN2020 0x00a19410
|
|
#define PHY_UID_IN112525_S03 0x02107440
|
|
|
|
#endif
|