phy.h
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上传日期:2009-04-28
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- /*
- * include/linux/phy.h
- *
- * Framework and drivers for configuring and reading different PHYs
- * Based on code in sungem_phy.c and gianfar_phy.c
- *
- * Author: Andy Fleming
- *
- * Copyright (c) 2004 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
- #ifndef __PHY_H
- #define __PHY_H
- #include <linux/spinlock.h>
- #include <linux/device.h>
- #define PHY_BASIC_FEATURES (SUPPORTED_10baseT_Half |
- SUPPORTED_10baseT_Full |
- SUPPORTED_100baseT_Half |
- SUPPORTED_100baseT_Full |
- SUPPORTED_Autoneg |
- SUPPORTED_TP |
- SUPPORTED_MII)
- #define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES |
- SUPPORTED_1000baseT_Half |
- SUPPORTED_1000baseT_Full)
- /* Set phydev->irq to PHY_POLL if interrupts are not supported,
- * or not desired for this PHY. Set to PHY_IGNORE_INTERRUPT if
- * the attached driver handles the interrupt
- */
- #define PHY_POLL -1
- #define PHY_IGNORE_INTERRUPT -2
- #define PHY_HAS_INTERRUPT 0x00000001
- #define PHY_HAS_MAGICANEG 0x00000002
- #define MII_BUS_MAX 4
- #define PHY_INIT_TIMEOUT 100000
- #define PHY_STATE_TIME 1
- #define PHY_FORCE_TIMEOUT 10
- #define PHY_AN_TIMEOUT 10
- #define PHY_MAX_ADDR 32
- /* The Bus class for PHYs. Devices which provide access to
- * PHYs should register using this structure */
- struct mii_bus {
- const char *name;
- int id;
- void *priv;
- int (*read)(struct mii_bus *bus, int phy_id, int regnum);
- int (*write)(struct mii_bus *bus, int phy_id, int regnum, u16 val);
- int (*reset)(struct mii_bus *bus);
- /* A lock to ensure that only one thing can read/write
- * the MDIO bus at a time */
- spinlock_t mdio_lock;
- struct device *dev;
- /* list of all PHYs on bus */
- struct phy_device *phy_map[PHY_MAX_ADDR];
- /* Pointer to an array of interrupts, each PHY's
- * interrupt at the index matching its address */
- int *irq;
- };
- #define PHY_INTERRUPT_DISABLED 0x0
- #define PHY_INTERRUPT_ENABLED 0x80000000
- /* PHY state machine states:
- *
- * DOWN: PHY device and driver are not ready for anything. probe
- * should be called if and only if the PHY is in this state,
- * given that the PHY device exists.
- * - PHY driver probe function will, depending on the PHY, set
- * the state to STARTING or READY
- *
- * STARTING: PHY device is coming up, and the ethernet driver is
- * not ready. PHY drivers may set this in the probe function.
- * If they do, they are responsible for making sure the state is
- * eventually set to indicate whether the PHY is UP or READY,
- * depending on the state when the PHY is done starting up.
- * - PHY driver will set the state to READY
- * - start will set the state to PENDING
- *
- * READY: PHY is ready to send and receive packets, but the
- * controller is not. By default, PHYs which do not implement
- * probe will be set to this state by phy_probe(). If the PHY
- * driver knows the PHY is ready, and the PHY state is STARTING,
- * then it sets this STATE.
- * - start will set the state to UP
- *
- * PENDING: PHY device is coming up, but the ethernet driver is
- * ready. phy_start will set this state if the PHY state is
- * STARTING.
- * - PHY driver will set the state to UP when the PHY is ready
- *
- * UP: The PHY and attached device are ready to do work.
- * Interrupts should be started here.
- * - timer moves to AN
- *
- * AN: The PHY is currently negotiating the link state. Link is
- * therefore down for now. phy_timer will set this state when it
- * detects the state is UP. config_aneg will set this state
- * whenever called with phydev->autoneg set to AUTONEG_ENABLE.
- * - If autonegotiation finishes, but there's no link, it sets
- * the state to NOLINK.
- * - If aneg finishes with link, it sets the state to RUNNING,
- * and calls adjust_link
- * - If autonegotiation did not finish after an arbitrary amount
- * of time, autonegotiation should be tried again if the PHY
- * supports "magic" autonegotiation (back to AN)
- * - If it didn't finish, and no magic_aneg, move to FORCING.
- *
- * NOLINK: PHY is up, but not currently plugged in.
- * - If the timer notes that the link comes back, we move to RUNNING
- * - config_aneg moves to AN
- * - phy_stop moves to HALTED
- *
- * FORCING: PHY is being configured with forced settings
- * - if link is up, move to RUNNING
- * - If link is down, we drop to the next highest setting, and
- * retry (FORCING) after a timeout
- * - phy_stop moves to HALTED
- *
- * RUNNING: PHY is currently up, running, and possibly sending
- * and/or receiving packets
- * - timer will set CHANGELINK if we're polling (this ensures the
- * link state is polled every other cycle of this state machine,
- * which makes it every other second)
- * - irq will set CHANGELINK
- * - config_aneg will set AN
- * - phy_stop moves to HALTED
- *
- * CHANGELINK: PHY experienced a change in link state
- * - timer moves to RUNNING if link
- * - timer moves to NOLINK if the link is down
- * - phy_stop moves to HALTED
- *
- * HALTED: PHY is up, but no polling or interrupts are done. Or
- * PHY is in an error state.
- *
- * - phy_start moves to RESUMING
- *
- * RESUMING: PHY was halted, but now wants to run again.
- * - If we are forcing, or aneg is done, timer moves to RUNNING
- * - If aneg is not done, timer moves to AN
- * - phy_stop moves to HALTED
- */
- enum phy_state {
- PHY_DOWN=0,
- PHY_STARTING,
- PHY_READY,
- PHY_PENDING,
- PHY_UP,
- PHY_AN,
- PHY_RUNNING,
- PHY_NOLINK,
- PHY_FORCING,
- PHY_CHANGELINK,
- PHY_HALTED,
- PHY_RESUMING
- };
- /* phy_device: An instance of a PHY
- *
- * drv: Pointer to the driver for this PHY instance
- * 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
- * state: state of the PHY for management purposes
- * dev_flags: Device-specific flags used by the PHY driver.
- * addr: Bus address of PHY
- * link_timeout: The number of timer firings to wait before the
- * giving up on the current attempt at acquiring a link
- * irq: IRQ number of the PHY's interrupt (-1 if none)
- * phy_timer: The timer for handling the state machine
- * phy_queue: A work_queue for the interrupt
- * attached_dev: The attached enet driver's device instance ptr
- * adjust_link: Callback for the enet controller to respond to
- * changes in the link state.
- * adjust_state: Callback for the enet driver to respond to
- * changes in the state machine.
- *
- * speed, duplex, pause, supported, advertising, and
- * autoneg are used like in mii_if_info
- *
- * interrupts currently only supports enabled or disabled,
- * but could be changed in the future to support enabling
- * and disabling specific interrupts
- *
- * Contains some infrastructure for polling and interrupt
- * handling, as well as handling shifts in PHY hardware state
- */
- struct phy_device {
- /* Information about the PHY type */
- /* And management functions */
- struct phy_driver *drv;
- struct mii_bus *bus;
- struct device dev;
- u32 phy_id;
- enum phy_state state;
- u32 dev_flags;
- /* Bus address of the PHY (0-32) */
- int addr;
- /* forced speed & duplex (no autoneg)
- * partner speed & duplex & pause (autoneg)
- */
- int speed;
- int duplex;
- int pause;
- int asym_pause;
- /* The most recently read link state */
- int link;
- /* Enabled Interrupts */
- u32 interrupts;
- /* Union of PHY and Attached devices' supported modes */
- /* See mii.h for more info */
- u32 supported;
- u32 advertising;
- int autoneg;
- int link_timeout;
- /* Interrupt number for this PHY
- * -1 means no interrupt */
- int irq;
- /* private data pointer */
- /* For use by PHYs to maintain extra state */
- void *priv;
- /* Interrupt and Polling infrastructure */
- struct work_struct phy_queue;
- struct timer_list phy_timer;
- spinlock_t lock;
- struct net_device *attached_dev;
- void (*adjust_link)(struct net_device *dev);
- void (*adjust_state)(struct net_device *dev);
- };
- #define to_phy_device(d) container_of(d, struct phy_device, dev)
- /* struct phy_driver: Driver structure for a particular PHY type
- *
- * phy_id: The result of reading the UID registers of this PHY
- * type, and ANDing them with the phy_id_mask. This driver
- * only works for PHYs with IDs which match this field
- * name: The friendly name of this PHY type
- * phy_id_mask: Defines the important bits of the phy_id
- * features: A list of features (speed, duplex, etc) supported
- * by this PHY
- * flags: A bitfield defining certain other features this PHY
- * supports (like interrupts)
- *
- * The drivers must implement config_aneg and read_status. All
- * other functions are optional. Note that none of these
- * functions should be called from interrupt time. The goal is
- * for the bus read/write functions to be able to block when the
- * bus transaction is happening, and be freed up by an interrupt
- * (The MPC85xx has this ability, though it is not currently
- * supported in the driver).
- */
- struct phy_driver {
- u32 phy_id;
- char *name;
- unsigned int phy_id_mask;
- u32 features;
- u32 flags;
- /* Called to initialize the PHY,
- * including after a reset */
- int (*config_init)(struct phy_device *phydev);
- /* Called during discovery. Used to set
- * up device-specific structures, if any */
- int (*probe)(struct phy_device *phydev);
- /* PHY Power Management */
- int (*suspend)(struct phy_device *phydev);
- int (*resume)(struct phy_device *phydev);
- /* Configures the advertisement and resets
- * autonegotiation if phydev->autoneg is on,
- * forces the speed to the current settings in phydev
- * if phydev->autoneg is off */
- int (*config_aneg)(struct phy_device *phydev);
- /* Determines the negotiated speed and duplex */
- int (*read_status)(struct phy_device *phydev);
- /* Clears any pending interrupts */
- int (*ack_interrupt)(struct phy_device *phydev);
- /* Enables or disables interrupts */
- int (*config_intr)(struct phy_device *phydev);
- /* Clears up any memory if needed */
- void (*remove)(struct phy_device *phydev);
- struct device_driver driver;
- };
- #define to_phy_driver(d) container_of(d, struct phy_driver, driver)
- int phy_read(struct phy_device *phydev, u16 regnum);
- int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
- struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
- int phy_clear_interrupt(struct phy_device *phydev);
- int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
- struct phy_device * phy_attach(struct net_device *dev,
- const char *phy_id, u32 flags);
- struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
- void (*handler)(struct net_device *), u32 flags);
- void phy_disconnect(struct phy_device *phydev);
- void phy_detach(struct phy_device *phydev);
- void phy_start(struct phy_device *phydev);
- void phy_stop(struct phy_device *phydev);
- int phy_start_aneg(struct phy_device *phydev);
- int mdiobus_register(struct mii_bus *bus);
- void mdiobus_unregister(struct mii_bus *bus);
- void phy_sanitize_settings(struct phy_device *phydev);
- int phy_stop_interrupts(struct phy_device *phydev);
- static inline int phy_read_status(struct phy_device *phydev) {
- return phydev->drv->read_status(phydev);
- }
- int genphy_config_advert(struct phy_device *phydev);
- int genphy_setup_forced(struct phy_device *phydev);
- int genphy_restart_aneg(struct phy_device *phydev);
- int genphy_config_aneg(struct phy_device *phydev);
- int genphy_update_link(struct phy_device *phydev);
- int genphy_read_status(struct phy_device *phydev);
- void phy_driver_unregister(struct phy_driver *drv);
- int phy_driver_register(struct phy_driver *new_driver);
- void phy_prepare_link(struct phy_device *phydev,
- void (*adjust_link)(struct net_device *));
- void phy_start_machine(struct phy_device *phydev,
- void (*handler)(struct net_device *));
- void phy_stop_machine(struct phy_device *phydev);
- int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
- int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
- int phy_mii_ioctl(struct phy_device *phydev,
- struct mii_ioctl_data *mii_data, int cmd);
- int phy_start_interrupts(struct phy_device *phydev);
- void phy_print_status(struct phy_device *phydev);
- extern struct bus_type mdio_bus_type;
- #endif /* __PHY_H */