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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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11b0bacd71
This makes it possible for HW PHY-less boards to utilize PAL goodies. Generic routines to connect to fixed PHY are provided, as well as ability to specify software callback that fills up link, speed, etc. information into PHY descriptor (the latter feature not tested so far). Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
385 lines
12 KiB
C
385 lines
12 KiB
C
/*
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* include/linux/phy.h
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*
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* Framework and drivers for configuring and reading different PHYs
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* Based on code in sungem_phy.c and gianfar_phy.c
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*
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* Author: Andy Fleming
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*
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#ifndef __PHY_H
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#define __PHY_H
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#include <linux/spinlock.h>
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#include <linux/device.h>
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#define PHY_BASIC_FEATURES (SUPPORTED_10baseT_Half | \
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SUPPORTED_10baseT_Full | \
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SUPPORTED_100baseT_Half | \
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SUPPORTED_100baseT_Full | \
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SUPPORTED_Autoneg | \
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SUPPORTED_TP | \
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SUPPORTED_MII)
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#define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES | \
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SUPPORTED_1000baseT_Half | \
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SUPPORTED_1000baseT_Full)
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/* Set phydev->irq to PHY_POLL if interrupts are not supported,
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* or not desired for this PHY. Set to PHY_IGNORE_INTERRUPT if
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* the attached driver handles the interrupt
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*/
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#define PHY_POLL -1
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#define PHY_IGNORE_INTERRUPT -2
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#define PHY_HAS_INTERRUPT 0x00000001
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#define PHY_HAS_MAGICANEG 0x00000002
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#define MII_BUS_MAX 4
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#define PHY_INIT_TIMEOUT 100000
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#define PHY_STATE_TIME 1
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#define PHY_FORCE_TIMEOUT 10
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#define PHY_AN_TIMEOUT 10
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#define PHY_MAX_ADDR 32
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/* Used when trying to connect to a specific phy (mii bus id:phy device id) */
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#define PHY_ID_FMT "%x:%02x"
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/* The Bus class for PHYs. Devices which provide access to
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* PHYs should register using this structure */
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struct mii_bus {
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const char *name;
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int id;
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void *priv;
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int (*read)(struct mii_bus *bus, int phy_id, int regnum);
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int (*write)(struct mii_bus *bus, int phy_id, int regnum, u16 val);
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int (*reset)(struct mii_bus *bus);
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/* A lock to ensure that only one thing can read/write
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* the MDIO bus at a time */
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spinlock_t mdio_lock;
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struct device *dev;
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/* list of all PHYs on bus */
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struct phy_device *phy_map[PHY_MAX_ADDR];
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/* Phy addresses to be ignored when probing */
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u32 phy_mask;
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/* Pointer to an array of interrupts, each PHY's
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* interrupt at the index matching its address */
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int *irq;
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};
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#define PHY_INTERRUPT_DISABLED 0x0
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#define PHY_INTERRUPT_ENABLED 0x80000000
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/* PHY state machine states:
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*
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* DOWN: PHY device and driver are not ready for anything. probe
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* should be called if and only if the PHY is in this state,
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* given that the PHY device exists.
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* - PHY driver probe function will, depending on the PHY, set
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* the state to STARTING or READY
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*
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* STARTING: PHY device is coming up, and the ethernet driver is
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* not ready. PHY drivers may set this in the probe function.
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* If they do, they are responsible for making sure the state is
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* eventually set to indicate whether the PHY is UP or READY,
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* depending on the state when the PHY is done starting up.
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* - PHY driver will set the state to READY
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* - start will set the state to PENDING
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*
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* READY: PHY is ready to send and receive packets, but the
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* controller is not. By default, PHYs which do not implement
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* probe will be set to this state by phy_probe(). If the PHY
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* driver knows the PHY is ready, and the PHY state is STARTING,
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* then it sets this STATE.
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* - start will set the state to UP
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*
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* PENDING: PHY device is coming up, but the ethernet driver is
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* ready. phy_start will set this state if the PHY state is
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* STARTING.
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* - PHY driver will set the state to UP when the PHY is ready
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*
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* UP: The PHY and attached device are ready to do work.
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* Interrupts should be started here.
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* - timer moves to AN
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*
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* AN: The PHY is currently negotiating the link state. Link is
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* therefore down for now. phy_timer will set this state when it
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* detects the state is UP. config_aneg will set this state
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* whenever called with phydev->autoneg set to AUTONEG_ENABLE.
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* - If autonegotiation finishes, but there's no link, it sets
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* the state to NOLINK.
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* - If aneg finishes with link, it sets the state to RUNNING,
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* and calls adjust_link
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* - If autonegotiation did not finish after an arbitrary amount
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* of time, autonegotiation should be tried again if the PHY
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* supports "magic" autonegotiation (back to AN)
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* - If it didn't finish, and no magic_aneg, move to FORCING.
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*
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* NOLINK: PHY is up, but not currently plugged in.
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* - If the timer notes that the link comes back, we move to RUNNING
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* - config_aneg moves to AN
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* - phy_stop moves to HALTED
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*
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* FORCING: PHY is being configured with forced settings
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* - if link is up, move to RUNNING
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* - If link is down, we drop to the next highest setting, and
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* retry (FORCING) after a timeout
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* - phy_stop moves to HALTED
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*
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* RUNNING: PHY is currently up, running, and possibly sending
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* and/or receiving packets
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* - timer will set CHANGELINK if we're polling (this ensures the
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* link state is polled every other cycle of this state machine,
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* which makes it every other second)
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* - irq will set CHANGELINK
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* - config_aneg will set AN
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* - phy_stop moves to HALTED
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*
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* CHANGELINK: PHY experienced a change in link state
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* - timer moves to RUNNING if link
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* - timer moves to NOLINK if the link is down
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* - phy_stop moves to HALTED
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*
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* HALTED: PHY is up, but no polling or interrupts are done. Or
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* PHY is in an error state.
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*
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* - phy_start moves to RESUMING
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*
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* RESUMING: PHY was halted, but now wants to run again.
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* - If we are forcing, or aneg is done, timer moves to RUNNING
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* - If aneg is not done, timer moves to AN
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* - phy_stop moves to HALTED
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*/
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enum phy_state {
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PHY_DOWN=0,
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PHY_STARTING,
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PHY_READY,
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PHY_PENDING,
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PHY_UP,
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PHY_AN,
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PHY_RUNNING,
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PHY_NOLINK,
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PHY_FORCING,
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PHY_CHANGELINK,
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PHY_HALTED,
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PHY_RESUMING
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};
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/* phy_device: An instance of a PHY
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*
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* drv: Pointer to the driver for this PHY instance
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* bus: Pointer to the bus this PHY is on
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* dev: driver model device structure for this PHY
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* phy_id: UID for this device found during discovery
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* state: state of the PHY for management purposes
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* dev_flags: Device-specific flags used by the PHY driver.
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* addr: Bus address of PHY
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* link_timeout: The number of timer firings to wait before the
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* giving up on the current attempt at acquiring a link
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* irq: IRQ number of the PHY's interrupt (-1 if none)
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* phy_timer: The timer for handling the state machine
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* phy_queue: A work_queue for the interrupt
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* attached_dev: The attached enet driver's device instance ptr
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* adjust_link: Callback for the enet controller to respond to
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* changes in the link state.
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* adjust_state: Callback for the enet driver to respond to
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* changes in the state machine.
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*
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* speed, duplex, pause, supported, advertising, and
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* autoneg are used like in mii_if_info
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*
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* interrupts currently only supports enabled or disabled,
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* but could be changed in the future to support enabling
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* and disabling specific interrupts
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*
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* Contains some infrastructure for polling and interrupt
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* handling, as well as handling shifts in PHY hardware state
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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 phy_driver *drv;
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struct mii_bus *bus;
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struct device dev;
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u32 phy_id;
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enum phy_state state;
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u32 dev_flags;
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/* Bus address of the PHY (0-32) */
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int addr;
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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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int pause;
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int asym_pause;
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/* The most recently read link state */
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int link;
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/* Enabled Interrupts */
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u32 interrupts;
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/* Union of PHY and Attached devices' supported modes */
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/* See mii.h for more info */
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u32 supported;
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u32 advertising;
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int autoneg;
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int link_timeout;
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/* Interrupt number for this PHY
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* -1 means no interrupt */
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int irq;
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/* private data pointer */
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/* For use by PHYs to maintain extra state */
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void *priv;
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/* Interrupt and Polling infrastructure */
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struct work_struct phy_queue;
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struct timer_list phy_timer;
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spinlock_t lock;
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struct net_device *attached_dev;
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void (*adjust_link)(struct net_device *dev);
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void (*adjust_state)(struct net_device *dev);
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};
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#define to_phy_device(d) container_of(d, struct phy_device, dev)
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/* struct phy_driver: Driver structure for a particular PHY type
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*
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* phy_id: The result of reading the UID registers of this PHY
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* type, and ANDing them with the phy_id_mask. This driver
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* only works for PHYs with IDs which match this field
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* name: The friendly name of this PHY type
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* phy_id_mask: Defines the important bits of the phy_id
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* features: A list of features (speed, duplex, etc) supported
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* by this PHY
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* flags: A bitfield defining certain other features this PHY
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* supports (like interrupts)
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*
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* The drivers must implement config_aneg and read_status. All
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* other functions are optional. Note that none of these
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* functions should be called from interrupt time. The goal is
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* for the bus read/write functions to be able to block when the
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* bus transaction is happening, and be freed up by an interrupt
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* (The MPC85xx has this ability, though it is not currently
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* supported in the driver).
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*/
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struct phy_driver {
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u32 phy_id;
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char *name;
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unsigned int phy_id_mask;
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u32 features;
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u32 flags;
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/* Called to initialize the PHY,
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* including after a reset */
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int (*config_init)(struct phy_device *phydev);
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/* Called during discovery. Used to set
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* up device-specific structures, if any */
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int (*probe)(struct phy_device *phydev);
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/* PHY Power Management */
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int (*suspend)(struct phy_device *phydev);
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int (*resume)(struct phy_device *phydev);
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/* Configures the advertisement and resets
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* autonegotiation if phydev->autoneg is on,
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* forces the speed to the current settings in phydev
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* if phydev->autoneg is off */
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int (*config_aneg)(struct phy_device *phydev);
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/* Determines the negotiated speed and duplex */
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int (*read_status)(struct phy_device *phydev);
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/* Clears any pending interrupts */
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int (*ack_interrupt)(struct phy_device *phydev);
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/* Enables or disables interrupts */
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int (*config_intr)(struct phy_device *phydev);
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/* Clears up any memory if needed */
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void (*remove)(struct phy_device *phydev);
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struct device_driver driver;
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};
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#define to_phy_driver(d) container_of(d, struct phy_driver, driver)
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int phy_read(struct phy_device *phydev, u16 regnum);
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int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
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struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
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int phy_clear_interrupt(struct phy_device *phydev);
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int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
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struct phy_device * phy_attach(struct net_device *dev,
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const char *phy_id, u32 flags);
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struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
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void (*handler)(struct net_device *), u32 flags);
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void phy_disconnect(struct phy_device *phydev);
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void phy_detach(struct phy_device *phydev);
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void phy_start(struct phy_device *phydev);
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void phy_stop(struct phy_device *phydev);
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int phy_start_aneg(struct phy_device *phydev);
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int mdiobus_register(struct mii_bus *bus);
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void mdiobus_unregister(struct mii_bus *bus);
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void phy_sanitize_settings(struct phy_device *phydev);
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int phy_stop_interrupts(struct phy_device *phydev);
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static inline int phy_read_status(struct phy_device *phydev) {
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return phydev->drv->read_status(phydev);
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}
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int genphy_config_advert(struct phy_device *phydev);
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int genphy_setup_forced(struct phy_device *phydev);
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int genphy_restart_aneg(struct phy_device *phydev);
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int genphy_config_aneg(struct phy_device *phydev);
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int genphy_update_link(struct phy_device *phydev);
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int genphy_read_status(struct phy_device *phydev);
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void phy_driver_unregister(struct phy_driver *drv);
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int phy_driver_register(struct phy_driver *new_driver);
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void phy_prepare_link(struct phy_device *phydev,
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void (*adjust_link)(struct net_device *));
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void phy_start_machine(struct phy_device *phydev,
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void (*handler)(struct net_device *));
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void phy_stop_machine(struct phy_device *phydev);
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int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
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int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
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int phy_mii_ioctl(struct phy_device *phydev,
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struct mii_ioctl_data *mii_data, int cmd);
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int phy_start_interrupts(struct phy_device *phydev);
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void phy_print_status(struct phy_device *phydev);
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struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id);
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extern struct bus_type mdio_bus_type;
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#endif /* __PHY_H */
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