include/linux/phy.h

   1 /*
   2  * Framework and drivers for configuring and reading different PHYs
   3  * Based on code in sungem_phy.c and gianfar_phy.c
   4  *
   5  * Author: Andy Fleming
   6  *
   7  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  *
  14  */
  15
  16 #ifndef __PHY_H
  17 #define __PHY_H
  18
  19 #include <linux/compiler.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/mdio.h>
  23 #include <linux/mii.h>
  24 #include <linux/module.h>
  25 #include <linux/timer.h>
  26 #include <linux/workqueue.h>
  27 #include <linux/mod_devicetable.h>
  28
  29 #include <linux/atomic.h>
  30
  31 #define PHY_DEFAULT_FEATURES    (SUPPORTED_Autoneg | \
  32                                  SUPPORTED_TP | \
  33                                  SUPPORTED_MII)
  34
  35 #define PHY_10BT_FEATURES       (SUPPORTED_10baseT_Half | \
  36                                  SUPPORTED_10baseT_Full)
  37
  38 #define PHY_100BT_FEATURES      (SUPPORTED_100baseT_Half | \
  39                                  SUPPORTED_100baseT_Full)
  40
  41 #define PHY_1000BT_FEATURES     (SUPPORTED_1000baseT_Half | \
  42                                  SUPPORTED_1000baseT_Full)
  43
  44 #define PHY_BASIC_FEATURES      (PHY_10BT_FEATURES | \
  45                                  PHY_100BT_FEATURES | \
  46                                  PHY_DEFAULT_FEATURES)
  47
  48 #define PHY_GBIT_FEATURES       (PHY_BASIC_FEATURES | \
  49                                  PHY_1000BT_FEATURES)
  50
  51
  52 /*
  53  * Set phydev->irq to PHY_POLL if interrupts are not supported,
  54  * or not desired for this PHY.  Set to PHY_IGNORE_INTERRUPT if
  55  * the attached driver handles the interrupt
  56  */
  57 #define PHY_POLL                -1
  58 #define PHY_IGNORE_INTERRUPT    -2
  59
  60 #define PHY_HAS_INTERRUPT       0x00000001
  61 #define PHY_HAS_MAGICANEG       0x00000002
  62 #define PHY_IS_INTERNAL         0x00000004
  63 #define MDIO_DEVICE_IS_PHY      0x80000000
  64
  65 /* Interface Mode definitions */
  66 typedef enum {
  67         PHY_INTERFACE_MODE_NA,
  68         PHY_INTERFACE_MODE_MII,
  69         PHY_INTERFACE_MODE_GMII,
  70         PHY_INTERFACE_MODE_SGMII,
  71         PHY_INTERFACE_MODE_TBI,
  72         PHY_INTERFACE_MODE_REVMII,
  73         PHY_INTERFACE_MODE_RMII,
  74         PHY_INTERFACE_MODE_RGMII,
  75         PHY_INTERFACE_MODE_RGMII_ID,
  76         PHY_INTERFACE_MODE_RGMII_RXID,
  77         PHY_INTERFACE_MODE_RGMII_TXID,
  78         PHY_INTERFACE_MODE_RTBI,
  79         PHY_INTERFACE_MODE_SMII,
  80         PHY_INTERFACE_MODE_XGMII,
  81         PHY_INTERFACE_MODE_MOCA,
  82         PHY_INTERFACE_MODE_QSGMII,
  83         PHY_INTERFACE_MODE_MAX,
  84 } phy_interface_t;
  85
  86 /**
  87  * It maps 'enum phy_interface_t' found in include/linux/phy.h
  88  * into the device tree binding of 'phy-mode', so that Ethernet
  89  * device driver can get phy interface from device tree.
  90  */
  91 static inline const char *phy_modes(phy_interface_t interface)
  92 {
  93         switch (interface) {
  94         case PHY_INTERFACE_MODE_NA:
  95                 return "";
  96         case PHY_INTERFACE_MODE_MII:
  97                 return "mii";
  98         case PHY_INTERFACE_MODE_GMII:
  99                 return "gmii";
 100         case PHY_INTERFACE_MODE_SGMII:
 101                 return "sgmii";
 102         case PHY_INTERFACE_MODE_TBI:
 103                 return "tbi";
 104         case PHY_INTERFACE_MODE_REVMII:
 105                 return "rev-mii";
 106         case PHY_INTERFACE_MODE_RMII:
 107                 return "rmii";
 108         case PHY_INTERFACE_MODE_RGMII:
 109                 return "rgmii";
 110         case PHY_INTERFACE_MODE_RGMII_ID:
 111                 return "rgmii-id";
 112         case PHY_INTERFACE_MODE_RGMII_RXID:
 113                 return "rgmii-rxid";
 114         case PHY_INTERFACE_MODE_RGMII_TXID:
 115                 return "rgmii-txid";
 116         case PHY_INTERFACE_MODE_RTBI:
 117                 return "rtbi";
 118         case PHY_INTERFACE_MODE_SMII:
 119                 return "smii";
 120         case PHY_INTERFACE_MODE_XGMII:
 121                 return "xgmii";
 122         case PHY_INTERFACE_MODE_MOCA:
 123                 return "moca";
 124         case PHY_INTERFACE_MODE_QSGMII:
 125                 return "qsgmii";
 126         default:
 127                 return "unknown";
 128         }
 129 }
 130
 131
 132 #define PHY_INIT_TIMEOUT        100000
 133 #define PHY_STATE_TIME          1
 134 #define PHY_FORCE_TIMEOUT       10
 135 #define PHY_AN_TIMEOUT          10
 136
 137 #define PHY_MAX_ADDR    32
 138
 139 /* Used when trying to connect to a specific phy (mii bus id:phy device id) */
 140 #define PHY_ID_FMT "%s:%02x"
 141
 142 /*
 143  * Need to be a little smaller than phydev->dev.bus_id to leave room
 144  * for the ":%02x"
 145  */
 146 #define MII_BUS_ID_SIZE (20 - 3)
 147
 148 /* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit
 149    IEEE 802.3ae clause 45 addressing mode used by 10GIGE phy chips. */
 150 #define MII_ADDR_C45 (1<<30)
 151
 152 struct device;
 153 struct sk_buff;
 154
 155 /*
 156  * The Bus class for PHYs.  Devices which provide access to
 157  * PHYs should register using this structure
 158  */
 159 struct mii_bus {
 160         struct module *owner;
 161         const char *name;
 162         char id[MII_BUS_ID_SIZE];
 163         void *priv;
 164         int (*read)(struct mii_bus *bus, int addr, int regnum);
 165         int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
 166         int (*reset)(struct mii_bus *bus);
 167
 168         /*
 169          * A lock to ensure that only one thing can read/write
 170          * the MDIO bus at a time
 171          */
 172         struct mutex mdio_lock;
 173
 174         struct device *parent;
 175         enum {
 176                 MDIOBUS_ALLOCATED = 1,
 177                 MDIOBUS_REGISTERED,
 178                 MDIOBUS_UNREGISTERED,
 179                 MDIOBUS_RELEASED,
 180         } state;
 181         struct device dev;
 182
 183         /* list of all PHYs on bus */
 184         struct mdio_device *mdio_map[PHY_MAX_ADDR];
 185
 186         /* PHY addresses to be ignored when probing */
 187         u32 phy_mask;
 188
 189         /* PHY addresses to ignore the TA/read failure */
 190         u32 phy_ignore_ta_mask;
 191
 192         /*
 193          * An array of interrupts, each PHY's interrupt at the index
 194          * matching its address
 195          */
 196         int irq[PHY_MAX_ADDR];
 197 };
 198 #define to_mii_bus(d) container_of(d, struct mii_bus, dev)
 199
 200 struct mii_bus *mdiobus_alloc_size(size_t);
 201 static inline struct mii_bus *mdiobus_alloc(void)
 202 {
 203         return mdiobus_alloc_size(0);
 204 }
 205
 206 int __mdiobus_register(struct mii_bus *bus, struct module *owner);
 207 #define mdiobus_register(bus) __mdiobus_register(bus, THIS_MODULE)
 208 void mdiobus_unregister(struct mii_bus *bus);
 209 void mdiobus_free(struct mii_bus *bus);
 210 struct mii_bus *devm_mdiobus_alloc_size(struct device *dev, int sizeof_priv);
 211 static inline struct mii_bus *devm_mdiobus_alloc(struct device *dev)
 212 {
 213         return devm_mdiobus_alloc_size(dev, 0);
 214 }
 215
 216 void devm_mdiobus_free(struct device *dev, struct mii_bus *bus);
 217 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
 218
 219 #define PHY_INTERRUPT_DISABLED  0x0
 220 #define PHY_INTERRUPT_ENABLED   0x80000000
 221
 222 /* PHY state machine states:
 223  *
 224  * DOWN: PHY device and driver are not ready for anything.  probe
 225  * should be called if and only if the PHY is in this state,
 226  * given that the PHY device exists.
 227  * - PHY driver probe function will, depending on the PHY, set
 228  * the state to STARTING or READY
 229  *
 230  * STARTING:  PHY device is coming up, and the ethernet driver is
 231  * not ready.  PHY drivers may set this in the probe function.
 232  * If they do, they are responsible for making sure the state is
 233  * eventually set to indicate whether the PHY is UP or READY,
 234  * depending on the state when the PHY is done starting up.
 235  * - PHY driver will set the state to READY
 236  * - start will set the state to PENDING
 237  *
 238  * READY: PHY is ready to send and receive packets, but the
 239  * controller is not.  By default, PHYs which do not implement
 240  * probe will be set to this state by phy_probe().  If the PHY
 241  * driver knows the PHY is ready, and the PHY state is STARTING,
 242  * then it sets this STATE.
 243  * - start will set the state to UP
 244  *
 245  * PENDING: PHY device is coming up, but the ethernet driver is
 246  * ready.  phy_start will set this state if the PHY state is
 247  * STARTING.
 248  * - PHY driver will set the state to UP when the PHY is ready
 249  *
 250  * UP: The PHY and attached device are ready to do work.
 251  * Interrupts should be started here.
 252  * - timer moves to AN
 253  *
 254  * AN: The PHY is currently negotiating the link state.  Link is
 255  * therefore down for now.  phy_timer will set this state when it
 256  * detects the state is UP.  config_aneg will set this state
 257  * whenever called with phydev->autoneg set to AUTONEG_ENABLE.
 258  * - If autonegotiation finishes, but there's no link, it sets
 259  *   the state to NOLINK.
 260  * - If aneg finishes with link, it sets the state to RUNNING,
 261  *   and calls adjust_link
 262  * - If autonegotiation did not finish after an arbitrary amount
 263  *   of time, autonegotiation should be tried again if the PHY
 264  *   supports "magic" autonegotiation (back to AN)
 265  * - If it didn't finish, and no magic_aneg, move to FORCING.
 266  *
 267  * NOLINK: PHY is up, but not currently plugged in.
 268  * - If the timer notes that the link comes back, we move to RUNNING
 269  * - config_aneg moves to AN
 270  * - phy_stop moves to HALTED
 271  *
 272  * FORCING: PHY is being configured with forced settings
 273  * - if link is up, move to RUNNING
 274  * - If link is down, we drop to the next highest setting, and
 275  *   retry (FORCING) after a timeout
 276  * - phy_stop moves to HALTED
 277  *
 278  * RUNNING: PHY is currently up, running, and possibly sending
 279  * and/or receiving packets
 280  * - timer will set CHANGELINK if we're polling (this ensures the
 281  *   link state is polled every other cycle of this state machine,
 282  *   which makes it every other second)
 283  * - irq will set CHANGELINK
 284  * - config_aneg will set AN
 285  * - phy_stop moves to HALTED
 286  *
 287  * CHANGELINK: PHY experienced a change in link state
 288  * - timer moves to RUNNING if link
 289  * - timer moves to NOLINK if the link is down
 290  * - phy_stop moves to HALTED
 291  *
 292  * HALTED: PHY is up, but no polling or interrupts are done. Or
 293  * PHY is in an error state.
 294  *
 295  * - phy_start moves to RESUMING
 296  *
 297  * RESUMING: PHY was halted, but now wants to run again.
 298  * - If we are forcing, or aneg is done, timer moves to RUNNING
 299  * - If aneg is not done, timer moves to AN
 300  * - phy_stop moves to HALTED
 301  */
 302 enum phy_state {
 303         PHY_DOWN = 0,
 304         PHY_STARTING,
 305         PHY_READY,
 306         PHY_PENDING,
 307         PHY_UP,
 308         PHY_AN,
 309         PHY_RUNNING,
 310         PHY_NOLINK,
 311         PHY_FORCING,
 312         PHY_CHANGELINK,
 313         PHY_HALTED,
 314         PHY_RESUMING
 315 };
 316
 317 /**
 318  * struct phy_c45_device_ids - 802.3-c45 Device Identifiers
 319  * @devices_in_package: Bit vector of devices present.
 320  * @device_ids: The device identifer for each present device.
 321  */
 322 struct phy_c45_device_ids {
 323         u32 devices_in_package;
 324         u32 device_ids[8];
 325 };
 326
 327 /* phy_device: An instance of a PHY
 328  *
 329  * drv: Pointer to the driver for this PHY instance
 330  * phy_id: UID for this device found during discovery
 331  * c45_ids: 802.3-c45 Device Identifers if is_c45.
 332  * is_c45:  Set to true if this phy uses clause 45 addressing.
 333  * is_internal: Set to true if this phy is internal to a MAC.
 334  * is_pseudo_fixed_link: Set to true if this phy is an Ethernet switch, etc.
 335  * has_fixups: Set to true if this phy has fixups/quirks.
 336  * suspended: Set to true if this phy has been suspended successfully.
 337  * state: state of the PHY for management purposes
 338  * dev_flags: Device-specific flags used by the PHY driver.
 339  * link_timeout: The number of timer firings to wait before the
 340  * giving up on the current attempt at acquiring a link
 341  * irq: IRQ number of the PHY's interrupt (-1 if none)
 342  * phy_timer: The timer for handling the state machine
 343  * phy_queue: A work_queue for the interrupt
 344  * attached_dev: The attached enet driver's device instance ptr
 345  * adjust_link: Callback for the enet controller to respond to
 346  * changes in the link state.
 347  *
 348  * speed, duplex, pause, supported, advertising, lp_advertising,
 349  * and autoneg are used like in mii_if_info
 350  *
 351  * interrupts currently only supports enabled or disabled,
 352  * but could be changed in the future to support enabling
 353  * and disabling specific interrupts
 354  *
 355  * Contains some infrastructure for polling and interrupt
 356  * handling, as well as handling shifts in PHY hardware state
 357  */
 358 struct phy_device {
 359         struct mdio_device mdio;
 360
 361         /* Information about the PHY type */
 362         /* And management functions */
 363         struct phy_driver *drv;
 364
 365         u32 phy_id;
 366
 367         struct phy_c45_device_ids c45_ids;
 368         bool is_c45;
 369         bool is_internal;
 370         bool is_pseudo_fixed_link;
 371         bool has_fixups;
 372         bool suspended;
 373
 374         enum phy_state state;
 375
 376         u32 dev_flags;
 377
 378         phy_interface_t interface;
 379
 380         /*
 381          * forced speed & duplex (no autoneg)
 382          * partner speed & duplex & pause (autoneg)
 383          */
 384         int speed;
 385         int duplex;
 386         int pause;
 387         int asym_pause;
 388
 389         /* The most recently read link state */
 390         int link;
 391
 392         /* Enabled Interrupts */
 393         u32 interrupts;
 394
 395         /* Union of PHY and Attached devices' supported modes */
 396         /* See mii.h for more info */
 397         u32 supported;
 398         u32 advertising;
 399         u32 lp_advertising;
 400
 401         int autoneg;
 402
 403         int link_timeout;
 404
 405         /*
 406          * Interrupt number for this PHY
 407          * -1 means no interrupt
 408          */
 409         int irq;
 410
 411         /* private data pointer */
 412         /* For use by PHYs to maintain extra state */
 413         void *priv;
 414
 415         /* Interrupt and Polling infrastructure */
 416         struct work_struct phy_queue;
 417         struct delayed_work state_queue;
 418         atomic_t irq_disable;
 419
 420         struct mutex lock;
 421
 422         struct net_device *attached_dev;
 423
 424         u8 mdix;
 425
 426         void (*adjust_link)(struct net_device *dev);
 427 };
 428 #define to_phy_device(d) container_of(to_mdio_device(d), \
 429                                       struct phy_device, mdio)
 430
 431 /* struct phy_driver: Driver structure for a particular PHY type
 432  *
 433  * driver_data: static driver data
 434  * phy_id: The result of reading the UID registers of this PHY
 435  *   type, and ANDing them with the phy_id_mask.  This driver
 436  *   only works for PHYs with IDs which match this field
 437  * name: The friendly name of this PHY type
 438  * phy_id_mask: Defines the important bits of the phy_id
 439  * features: A list of features (speed, duplex, etc) supported
 440  *   by this PHY
 441  * flags: A bitfield defining certain other features this PHY
 442  *   supports (like interrupts)
 443  *
 444  * The drivers must implement config_aneg and read_status.  All
 445  * other functions are optional. Note that none of these
 446  * functions should be called from interrupt time.  The goal is
 447  * for the bus read/write functions to be able to block when the
 448  * bus transaction is happening, and be freed up by an interrupt
 449  * (The MPC85xx has this ability, though it is not currently
 450  * supported in the driver).
 451  */
 452 struct phy_driver {
 453         struct mdio_driver_common mdiodrv;
 454         u32 phy_id;
 455         char *name;
 456         unsigned int phy_id_mask;
 457         u32 features;
 458         u32 flags;
 459         const void *driver_data;
 460
 461         /*
 462          * Called to issue a PHY software reset
 463          */
 464         int (*soft_reset)(struct phy_device *phydev);
 465
 466         /*
 467          * Called to initialize the PHY,
 468          * including after a reset
 469          */
 470         int (*config_init)(struct phy_device *phydev);
 471
 472         /*
 473          * Called during discovery.  Used to set
 474          * up device-specific structures, if any
 475          */
 476         int (*probe)(struct phy_device *phydev);
 477
 478         /* PHY Power Management */
 479         int (*suspend)(struct phy_device *phydev);
 480         int (*resume)(struct phy_device *phydev);
 481
 482         /*
 483          * Configures the advertisement and resets
 484          * autonegotiation if phydev->autoneg is on,
 485          * forces the speed to the current settings in phydev
 486          * if phydev->autoneg is off
 487          */
 488         int (*config_aneg)(struct phy_device *phydev);
 489
 490         /* Determines the auto negotiation result */
 491         int (*aneg_done)(struct phy_device *phydev);
 492
 493         /* Determines the negotiated speed and duplex */
 494         int (*read_status)(struct phy_device *phydev);
 495
 496         /* Clears any pending interrupts */
 497         int (*ack_interrupt)(struct phy_device *phydev);
 498
 499         /* Enables or disables interrupts */
 500         int (*config_intr)(struct phy_device *phydev);
 501
 502         /*
 503          * Checks if the PHY generated an interrupt.
 504          * For multi-PHY devices with shared PHY interrupt pin
 505          */
 506         int (*did_interrupt)(struct phy_device *phydev);
 507
 508         /* Clears up any memory if needed */
 509         void (*remove)(struct phy_device *phydev);
 510
 511         /* Returns true if this is a suitable driver for the given
 512          * phydev.  If NULL, matching is based on phy_id and
 513          * phy_id_mask.
 514          */
 515         int (*match_phy_device)(struct phy_device *phydev);
 516
 517         /* Handles ethtool queries for hardware time stamping. */
 518         int (*ts_info)(struct phy_device *phydev, struct ethtool_ts_info *ti);
 519
 520         /* Handles SIOCSHWTSTAMP ioctl for hardware time stamping. */
 521         int  (*hwtstamp)(struct phy_device *phydev, struct ifreq *ifr);
 522
 523         /*
 524          * Requests a Rx timestamp for 'skb'. If the skb is accepted,
 525          * the phy driver promises to deliver it using netif_rx() as
 526          * soon as a timestamp becomes available. One of the
 527          * PTP_CLASS_ values is passed in 'type'. The function must
 528          * return true if the skb is accepted for delivery.
 529          */
 530         bool (*rxtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
 531
 532         /*
 533          * Requests a Tx timestamp for 'skb'. The phy driver promises
 534          * to deliver it using skb_complete_tx_timestamp() as soon as a
 535          * timestamp becomes available. One of the PTP_CLASS_ values
 536          * is passed in 'type'.
 537          */
 538         void (*txtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
 539
 540         /* Some devices (e.g. qnap TS-119P II) require PHY register changes to
 541          * enable Wake on LAN, so set_wol is provided to be called in the
 542          * ethernet driver's set_wol function. */
 543         int (*set_wol)(struct phy_device *dev, struct ethtool_wolinfo *wol);
 544
 545         /* See set_wol, but for checking whether Wake on LAN is enabled. */
 546         void (*get_wol)(struct phy_device *dev, struct ethtool_wolinfo *wol);
 547
 548         /*
 549          * Called to inform a PHY device driver when the core is about to
 550          * change the link state. This callback is supposed to be used as
 551          * fixup hook for drivers that need to take action when the link
 552          * state changes. Drivers are by no means allowed to mess with the
 553          * PHY device structure in their implementations.
 554          */
 555         void (*link_change_notify)(struct phy_device *dev);
 556
 557         /* A function provided by a phy specific driver to override the
 558          * the PHY driver framework support for reading a MMD register
 559          * from the PHY. If not supported, return -1. This function is
 560          * optional for PHY specific drivers, if not provided then the
 561          * default MMD read function is used by the PHY framework.
 562          */
 563         int (*read_mmd_indirect)(struct phy_device *dev, int ptrad,
 564                                  int devnum, int regnum);
 565
 566         /* A function provided by a phy specific driver to override the
 567          * the PHY driver framework support for writing a MMD register
 568          * from the PHY. This function is optional for PHY specific drivers,
 569          * if not provided then the default MMD read function is used by
 570          * the PHY framework.
 571          */
 572         void (*write_mmd_indirect)(struct phy_device *dev, int ptrad,
 573                                    int devnum, int regnum, u32 val);
 574
 575         /* Get the size and type of the eeprom contained within a plug-in
 576          * module */
 577         int (*module_info)(struct phy_device *dev,
 578                            struct ethtool_modinfo *modinfo);
 579
 580         /* Get the eeprom information from the plug-in module */
 581         int (*module_eeprom)(struct phy_device *dev,
 582                              struct ethtool_eeprom *ee, u8 *data);
 583
 584         /* Get statistics from the phy using ethtool */
 585         int (*get_sset_count)(struct phy_device *dev);
 586         void (*get_strings)(struct phy_device *dev, u8 *data);
 587         void (*get_stats)(struct phy_device *dev,
 588                           struct ethtool_stats *stats, u64 *data);
 589 };
 590 #define to_phy_driver(d) container_of(to_mdio_common_driver(d),         \
 591                                       struct phy_driver, mdiodrv)
 592
 593 #define PHY_ANY_ID "MATCH ANY PHY"
 594 #define PHY_ANY_UID 0xffffffff
 595
 596 /* A Structure for boards to register fixups with the PHY Lib */
 597 struct phy_fixup {
 598         struct list_head list;
 599         char bus_id[20];
 600         u32 phy_uid;
 601         u32 phy_uid_mask;
 602         int (*run)(struct phy_device *phydev);
 603 };
 604
 605 /**
 606  * phy_read_mmd - Convenience function for reading a register
 607  * from an MMD on a given PHY.
 608  * @phydev: The phy_device struct
 609  * @devad: The MMD to read from
 610  * @regnum: The register on the MMD to read
 611  *
 612  * Same rules as for phy_read();
 613  */
 614 static inline int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
 615 {
 616         if (!phydev->is_c45)
 617                 return -EOPNOTSUPP;
 618
 619         return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr,
 620                             MII_ADDR_C45 | (devad << 16) | (regnum & 0xffff));
 621 }
 622
 623 /**
 624  * phy_read_mmd_indirect - reads data from the MMD registers
 625  * @phydev: The PHY device bus
 626  * @prtad: MMD Address
 627  * @addr: PHY address on the MII bus
 628  *
 629  * Description: it reads data from the MMD registers (clause 22 to access to
 630  * clause 45) of the specified phy address.
 631  */
 632 int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad);
 633
 634 /**
 635  * phy_read - Convenience function for reading a given PHY register
 636  * @phydev: the phy_device struct
 637  * @regnum: register number to read
 638  *
 639  * NOTE: MUST NOT be called from interrupt context,
 640  * because the bus read/write functions may wait for an interrupt
 641  * to conclude the operation.
 642  */
 643 static inline int phy_read(struct phy_device *phydev, u32 regnum)
 644 {
 645         return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, regnum);
 646 }
 647
 648 /**
 649  * phy_write - Convenience function for writing a given PHY register
 650  * @phydev: the phy_device struct
 651  * @regnum: register number to write
 652  * @val: value to write to @regnum
 653  *
 654  * NOTE: MUST NOT be called from interrupt context,
 655  * because the bus read/write functions may wait for an interrupt
 656  * to conclude the operation.
 657  */
 658 static inline int phy_write(struct phy_device *phydev, u32 regnum, u16 val)
 659 {
 660         return mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, regnum, val);
 661 }
 662
 663 /**
 664  * phy_interrupt_is_valid - Convenience function for testing a given PHY irq
 665  * @phydev: the phy_device struct
 666  *
 667  * NOTE: must be kept in sync with addition/removal of PHY_POLL and
 668  * PHY_IGNORE_INTERRUPT
 669  */
 670 static inline bool phy_interrupt_is_valid(struct phy_device *phydev)
 671 {
 672         return phydev->irq != PHY_POLL && phydev->irq != PHY_IGNORE_INTERRUPT;
 673 }
 674
 675 /**
 676  * phy_is_internal - Convenience function for testing if a PHY is internal
 677  * @phydev: the phy_device struct
 678  */
 679 static inline bool phy_is_internal(struct phy_device *phydev)
 680 {
 681         return phydev->is_internal;
 682 }
 683
 684 /**
 685  * phy_interface_is_rgmii - Convenience function for testing if a PHY interface
 686  * is RGMII (all variants)
 687  * @phydev: the phy_device struct
 688  */
 689 static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
 690 {
 691         return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
 692                 phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
 693 };
 694
 695 /*
 696  * phy_is_pseudo_fixed_link - Convenience function for testing if this
 697  * PHY is the CPU port facing side of an Ethernet switch, or similar.
 698  * @phydev: the phy_device struct
 699  */
 700 static inline bool phy_is_pseudo_fixed_link(struct phy_device *phydev)
 701 {
 702         return phydev->is_pseudo_fixed_link;
 703 }
 704
 705 /**
 706  * phy_write_mmd - Convenience function for writing a register
 707  * on an MMD on a given PHY.
 708  * @phydev: The phy_device struct
 709  * @devad: The MMD to read from
 710  * @regnum: The register on the MMD to read
 711  * @val: value to write to @regnum
 712  *
 713  * Same rules as for phy_write();
 714  */
 715 static inline int phy_write_mmd(struct phy_device *phydev, int devad,
 716                                 u32 regnum, u16 val)
 717 {
 718         if (!phydev->is_c45)
 719                 return -EOPNOTSUPP;
 720
 721         regnum = MII_ADDR_C45 | ((devad & 0x1f) << 16) | (regnum & 0xffff);
 722
 723         return mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, regnum, val);
 724 }
 725
 726 /**
 727  * phy_write_mmd_indirect - writes data to the MMD registers
 728  * @phydev: The PHY device
 729  * @prtad: MMD Address
 730  * @devad: MMD DEVAD
 731  * @data: data to write in the MMD register
 732  *
 733  * Description: Write data from the MMD registers of the specified
 734  * phy address.
 735  */
 736 void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
 737                             int devad, u32 data);
 738
 739 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
 740                                      bool is_c45,
 741                                      struct phy_c45_device_ids *c45_ids);
 742 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
 743 int phy_device_register(struct phy_device *phy);
 744 void phy_device_remove(struct phy_device *phydev);
 745 int phy_init_hw(struct phy_device *phydev);
 746 int phy_suspend(struct phy_device *phydev);
 747 int phy_resume(struct phy_device *phydev);
 748 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
 749                               phy_interface_t interface);
 750 struct phy_device *phy_find_first(struct mii_bus *bus);
 751 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
 752                       u32 flags, phy_interface_t interface);
 753 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
 754                        void (*handler)(struct net_device *),
 755                        phy_interface_t interface);
 756 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
 757                                void (*handler)(struct net_device *),
 758                                phy_interface_t interface);
 759 void phy_disconnect(struct phy_device *phydev);
 760 void phy_detach(struct phy_device *phydev);
 761 void phy_start(struct phy_device *phydev);
 762 void phy_stop(struct phy_device *phydev);
 763 int phy_start_aneg(struct phy_device *phydev);
 764
 765 int phy_stop_interrupts(struct phy_device *phydev);
 766
 767 static inline int phy_read_status(struct phy_device *phydev)
 768 {
 769         return phydev->drv->read_status(phydev);
 770 }
 771
 772 #define phydev_err(_phydev, format, args...)    \
 773         dev_err(&_phydev->mdio.dev, format, ##args)
 774
 775 #define phydev_dbg(_phydev, format, args...)    \
 776         dev_dbg(&_phydev->mdio.dev, format, ##args);
 777
 778 static inline const char *phydev_name(const struct phy_device *phydev)
 779 {
 780         return dev_name(&phydev->mdio.dev);
 781 }
 782
 783 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
 784         __printf(2, 3);
 785 void phy_attached_info(struct phy_device *phydev);
 786 int genphy_config_init(struct phy_device *phydev);
 787 int genphy_setup_forced(struct phy_device *phydev);
 788 int genphy_restart_aneg(struct phy_device *phydev);
 789 int genphy_config_aneg(struct phy_device *phydev);
 790 int genphy_aneg_done(struct phy_device *phydev);
 791 int genphy_update_link(struct phy_device *phydev);
 792 int genphy_read_status(struct phy_device *phydev);
 793 int genphy_suspend(struct phy_device *phydev);
 794 int genphy_resume(struct phy_device *phydev);
 795 int genphy_soft_reset(struct phy_device *phydev);
 796 void phy_driver_unregister(struct phy_driver *drv);
 797 void phy_drivers_unregister(struct phy_driver *drv, int n);
 798 int phy_driver_register(struct phy_driver *new_driver, struct module *owner);
 799 int phy_drivers_register(struct phy_driver *new_driver, int n,
 800                          struct module *owner);
 801 void phy_state_machine(struct work_struct *work);
 802 void phy_change(struct work_struct *work);
 803 void phy_mac_interrupt(struct phy_device *phydev, int new_link);
 804 void phy_start_machine(struct phy_device *phydev);
 805 void phy_stop_machine(struct phy_device *phydev);
 806 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
 807 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
 808 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd);
 809 int phy_start_interrupts(struct phy_device *phydev);
 810 void phy_print_status(struct phy_device *phydev);
 811 void phy_device_free(struct phy_device *phydev);
 812 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
 813
 814 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
 815                        int (*run)(struct phy_device *));
 816 int phy_register_fixup_for_id(const char *bus_id,
 817                               int (*run)(struct phy_device *));
 818 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
 819                                int (*run)(struct phy_device *));
 820
 821 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable);
 822 int phy_get_eee_err(struct phy_device *phydev);
 823 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data);
 824 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data);
 825 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol);
 826 void phy_ethtool_get_wol(struct phy_device *phydev,
 827                          struct ethtool_wolinfo *wol);
 828
 829 int __init mdio_bus_init(void);
 830 void mdio_bus_exit(void);
 831
 832 extern struct bus_type mdio_bus_type;
 833
 834 /**
 835  * module_phy_driver() - Helper macro for registering PHY drivers
 836  * @__phy_drivers: array of PHY drivers to register
 837  *
 838  * Helper macro for PHY drivers which do not do anything special in module
 839  * init/exit. Each module may only use this macro once, and calling it
 840  * replaces module_init() and module_exit().
 841  */
 842 #define phy_module_driver(__phy_drivers, __count)                       \
 843 static int __init phy_module_init(void)                                 \
 844 {                                                                       \
 845         return phy_drivers_register(__phy_drivers, __count, THIS_MODULE); \
 846 }                                                                       \
 847 module_init(phy_module_init);                                           \
 848 static void __exit phy_module_exit(void)                                \
 849 {                                                                       \
 850         phy_drivers_unregister(__phy_drivers, __count);                 \
 851 }                                                                       \
 852 module_exit(phy_module_exit)
 853
 854 #define module_phy_driver(__phy_drivers)                                \
 855         phy_module_driver(__phy_drivers, ARRAY_SIZE(__phy_drivers))
 856
 857 #endif /* __PHY_H */