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_TRGMII,
  84         PHY_INTERFACE_MODE_1000BASEX,
  85         PHY_INTERFACE_MODE_2500BASEX,
  86         PHY_INTERFACE_MODE_RXAUI,
  87         PHY_INTERFACE_MODE_MAX,
  88 } phy_interface_t;
  89
  90 /**
  91  * phy_supported_speeds - return all speeds currently supported by a phy device
  92  * @phy: The phy device to return supported speeds of.
  93  * @speeds: buffer to store supported speeds in.
  94  * @size: size of speeds buffer.
  95  *
  96  * Description: Returns the number of supported speeds, and
  97  * fills the speeds * buffer with the supported speeds. If speeds buffer is
  98  * too small to contain * all currently supported speeds, will return as
  99  * many speeds as can fit.
 100  */
 101 unsigned int phy_supported_speeds(struct phy_device *phy,
 102                                       unsigned int *speeds,
 103                                       unsigned int size);
 104
 105 /**
 106  * It maps 'enum phy_interface_t' found in include/linux/phy.h
 107  * into the device tree binding of 'phy-mode', so that Ethernet
 108  * device driver can get phy interface from device tree.
 109  */
 110 static inline const char *phy_modes(phy_interface_t interface)
 111 {
 112         switch (interface) {
 113         case PHY_INTERFACE_MODE_NA:
 114                 return "";
 115         case PHY_INTERFACE_MODE_MII:
 116                 return "mii";
 117         case PHY_INTERFACE_MODE_GMII:
 118                 return "gmii";
 119         case PHY_INTERFACE_MODE_SGMII:
 120                 return "sgmii";
 121         case PHY_INTERFACE_MODE_TBI:
 122                 return "tbi";
 123         case PHY_INTERFACE_MODE_REVMII:
 124                 return "rev-mii";
 125         case PHY_INTERFACE_MODE_RMII:
 126                 return "rmii";
 127         case PHY_INTERFACE_MODE_RGMII:
 128                 return "rgmii";
 129         case PHY_INTERFACE_MODE_RGMII_ID:
 130                 return "rgmii-id";
 131         case PHY_INTERFACE_MODE_RGMII_RXID:
 132                 return "rgmii-rxid";
 133         case PHY_INTERFACE_MODE_RGMII_TXID:
 134                 return "rgmii-txid";
 135         case PHY_INTERFACE_MODE_RTBI:
 136                 return "rtbi";
 137         case PHY_INTERFACE_MODE_SMII:
 138                 return "smii";
 139         case PHY_INTERFACE_MODE_XGMII:
 140                 return "xgmii";
 141         case PHY_INTERFACE_MODE_MOCA:
 142                 return "moca";
 143         case PHY_INTERFACE_MODE_QSGMII:
 144                 return "qsgmii";
 145         case PHY_INTERFACE_MODE_TRGMII:
 146                 return "trgmii";
 147         case PHY_INTERFACE_MODE_1000BASEX:
 148                 return "1000base-x";
 149         case PHY_INTERFACE_MODE_2500BASEX:
 150                 return "2500base-x";
 151         case PHY_INTERFACE_MODE_RXAUI:
 152                 return "rxaui";
 153         default:
 154                 return "unknown";
 155         }
 156 }
 157
 158
 159 #define PHY_INIT_TIMEOUT        100000
 160 #define PHY_STATE_TIME          1
 161 #define PHY_FORCE_TIMEOUT       10
 162 #define PHY_AN_TIMEOUT          10
 163
 164 #define PHY_MAX_ADDR    32
 165
 166 /* Used when trying to connect to a specific phy (mii bus id:phy device id) */
 167 #define PHY_ID_FMT "%s:%02x"
 168
 169 #define MII_BUS_ID_SIZE 61
 170
 171 /* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit
 172    IEEE 802.3ae clause 45 addressing mode used by 10GIGE phy chips. */
 173 #define MII_ADDR_C45 (1<<30)
 174
 175 struct device;
 176 struct sk_buff;
 177
 178 /*
 179  * The Bus class for PHYs.  Devices which provide access to
 180  * PHYs should register using this structure
 181  */
 182 struct mii_bus {
 183         struct module *owner;
 184         const char *name;
 185         char id[MII_BUS_ID_SIZE];
 186         void *priv;
 187         int (*read)(struct mii_bus *bus, int addr, int regnum);
 188         int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
 189         int (*reset)(struct mii_bus *bus);
 190
 191         /*
 192          * A lock to ensure that only one thing can read/write
 193          * the MDIO bus at a time
 194          */
 195         struct mutex mdio_lock;
 196
 197         struct device *parent;
 198         enum {
 199                 MDIOBUS_ALLOCATED = 1,
 200                 MDIOBUS_REGISTERED,
 201                 MDIOBUS_UNREGISTERED,
 202                 MDIOBUS_RELEASED,
 203         } state;
 204         struct device dev;
 205
 206         /* list of all PHYs on bus */
 207         struct mdio_device *mdio_map[PHY_MAX_ADDR];
 208
 209         /* PHY addresses to be ignored when probing */
 210         u32 phy_mask;
 211
 212         /* PHY addresses to ignore the TA/read failure */
 213         u32 phy_ignore_ta_mask;
 214
 215         /*
 216          * An array of interrupts, each PHY's interrupt at the index
 217          * matching its address
 218          */
 219         int irq[PHY_MAX_ADDR];
 220 };
 221 #define to_mii_bus(d) container_of(d, struct mii_bus, dev)
 222
 223 struct mii_bus *mdiobus_alloc_size(size_t);
 224 static inline struct mii_bus *mdiobus_alloc(void)
 225 {
 226         return mdiobus_alloc_size(0);
 227 }
 228
 229 int __mdiobus_register(struct mii_bus *bus, struct module *owner);
 230 #define mdiobus_register(bus) __mdiobus_register(bus, THIS_MODULE)
 231 void mdiobus_unregister(struct mii_bus *bus);
 232 void mdiobus_free(struct mii_bus *bus);
 233 struct mii_bus *devm_mdiobus_alloc_size(struct device *dev, int sizeof_priv);
 234 static inline struct mii_bus *devm_mdiobus_alloc(struct device *dev)
 235 {
 236         return devm_mdiobus_alloc_size(dev, 0);
 237 }
 238
 239 void devm_mdiobus_free(struct device *dev, struct mii_bus *bus);
 240 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
 241
 242 #define PHY_INTERRUPT_DISABLED  0x0
 243 #define PHY_INTERRUPT_ENABLED   0x80000000
 244
 245 /* PHY state machine states:
 246  *
 247  * DOWN: PHY device and driver are not ready for anything.  probe
 248  * should be called if and only if the PHY is in this state,
 249  * given that the PHY device exists.
 250  * - PHY driver probe function will, depending on the PHY, set
 251  * the state to STARTING or READY
 252  *
 253  * STARTING:  PHY device is coming up, and the ethernet driver is
 254  * not ready.  PHY drivers may set this in the probe function.
 255  * If they do, they are responsible for making sure the state is
 256  * eventually set to indicate whether the PHY is UP or READY,
 257  * depending on the state when the PHY is done starting up.
 258  * - PHY driver will set the state to READY
 259  * - start will set the state to PENDING
 260  *
 261  * READY: PHY is ready to send and receive packets, but the
 262  * controller is not.  By default, PHYs which do not implement
 263  * probe will be set to this state by phy_probe().  If the PHY
 264  * driver knows the PHY is ready, and the PHY state is STARTING,
 265  * then it sets this STATE.
 266  * - start will set the state to UP
 267  *
 268  * PENDING: PHY device is coming up, but the ethernet driver is
 269  * ready.  phy_start will set this state if the PHY state is
 270  * STARTING.
 271  * - PHY driver will set the state to UP when the PHY is ready
 272  *
 273  * UP: The PHY and attached device are ready to do work.
 274  * Interrupts should be started here.
 275  * - timer moves to AN
 276  *
 277  * AN: The PHY is currently negotiating the link state.  Link is
 278  * therefore down for now.  phy_timer will set this state when it
 279  * detects the state is UP.  config_aneg will set this state
 280  * whenever called with phydev->autoneg set to AUTONEG_ENABLE.
 281  * - If autonegotiation finishes, but there's no link, it sets
 282  *   the state to NOLINK.
 283  * - If aneg finishes with link, it sets the state to RUNNING,
 284  *   and calls adjust_link
 285  * - If autonegotiation did not finish after an arbitrary amount
 286  *   of time, autonegotiation should be tried again if the PHY
 287  *   supports "magic" autonegotiation (back to AN)
 288  * - If it didn't finish, and no magic_aneg, move to FORCING.
 289  *
 290  * NOLINK: PHY is up, but not currently plugged in.
 291  * - If the timer notes that the link comes back, we move to RUNNING
 292  * - config_aneg moves to AN
 293  * - phy_stop moves to HALTED
 294  *
 295  * FORCING: PHY is being configured with forced settings
 296  * - if link is up, move to RUNNING
 297  * - If link is down, we drop to the next highest setting, and
 298  *   retry (FORCING) after a timeout
 299  * - phy_stop moves to HALTED
 300  *
 301  * RUNNING: PHY is currently up, running, and possibly sending
 302  * and/or receiving packets
 303  * - timer will set CHANGELINK if we're polling (this ensures the
 304  *   link state is polled every other cycle of this state machine,
 305  *   which makes it every other second)
 306  * - irq will set CHANGELINK
 307  * - config_aneg will set AN
 308  * - phy_stop moves to HALTED
 309  *
 310  * CHANGELINK: PHY experienced a change in link state
 311  * - timer moves to RUNNING if link
 312  * - timer moves to NOLINK if the link is down
 313  * - phy_stop moves to HALTED
 314  *
 315  * HALTED: PHY is up, but no polling or interrupts are done. Or
 316  * PHY is in an error state.
 317  *
 318  * - phy_start moves to RESUMING
 319  *
 320  * RESUMING: PHY was halted, but now wants to run again.
 321  * - If we are forcing, or aneg is done, timer moves to RUNNING
 322  * - If aneg is not done, timer moves to AN
 323  * - phy_stop moves to HALTED
 324  */
 325 enum phy_state {
 326         PHY_DOWN = 0,
 327         PHY_STARTING,
 328         PHY_READY,
 329         PHY_PENDING,
 330         PHY_UP,
 331         PHY_AN,
 332         PHY_RUNNING,
 333         PHY_NOLINK,
 334         PHY_FORCING,
 335         PHY_CHANGELINK,
 336         PHY_HALTED,
 337         PHY_RESUMING
 338 };
 339
 340 /**
 341  * struct phy_c45_device_ids - 802.3-c45 Device Identifiers
 342  * @devices_in_package: Bit vector of devices present.
 343  * @device_ids: The device identifer for each present device.
 344  */
 345 struct phy_c45_device_ids {
 346         u32 devices_in_package;
 347         u32 device_ids[8];
 348 };
 349
 350 /* phy_device: An instance of a PHY
 351  *
 352  * drv: Pointer to the driver for this PHY instance
 353  * phy_id: UID for this device found during discovery
 354  * c45_ids: 802.3-c45 Device Identifers if is_c45.
 355  * is_c45:  Set to true if this phy uses clause 45 addressing.
 356  * is_internal: Set to true if this phy is internal to a MAC.
 357  * is_pseudo_fixed_link: Set to true if this phy is an Ethernet switch, etc.
 358  * has_fixups: Set to true if this phy has fixups/quirks.
 359  * suspended: Set to true if this phy has been suspended successfully.
 360  * state: state of the PHY for management purposes
 361  * dev_flags: Device-specific flags used by the PHY driver.
 362  * link_timeout: The number of timer firings to wait before the
 363  * giving up on the current attempt at acquiring a link
 364  * irq: IRQ number of the PHY's interrupt (-1 if none)
 365  * phy_timer: The timer for handling the state machine
 366  * phy_queue: A work_queue for the phy_mac_interrupt
 367  * attached_dev: The attached enet driver's device instance ptr
 368  * adjust_link: Callback for the enet controller to respond to
 369  * changes in the link state.
 370  *
 371  * speed, duplex, pause, supported, advertising, lp_advertising,
 372  * and autoneg are used like in mii_if_info
 373  *
 374  * interrupts currently only supports enabled or disabled,
 375  * but could be changed in the future to support enabling
 376  * and disabling specific interrupts
 377  *
 378  * Contains some infrastructure for polling and interrupt
 379  * handling, as well as handling shifts in PHY hardware state
 380  */
 381 struct phy_device {
 382         struct mdio_device mdio;
 383
 384         /* Information about the PHY type */
 385         /* And management functions */
 386         struct phy_driver *drv;
 387
 388         u32 phy_id;
 389
 390         struct phy_c45_device_ids c45_ids;
 391         bool is_c45;
 392         bool is_internal;
 393         bool is_pseudo_fixed_link;
 394         bool has_fixups;
 395         bool suspended;
 396
 397         enum phy_state state;
 398
 399         u32 dev_flags;
 400
 401         phy_interface_t interface;
 402
 403         /*
 404          * forced speed & duplex (no autoneg)
 405          * partner speed & duplex & pause (autoneg)
 406          */
 407         int speed;
 408         int duplex;
 409         int pause;
 410         int asym_pause;
 411
 412         /* The most recently read link state */
 413         int link;
 414
 415         /* Enabled Interrupts */
 416         u32 interrupts;
 417
 418         /* Union of PHY and Attached devices' supported modes */
 419         /* See mii.h for more info */
 420         u32 supported;
 421         u32 advertising;
 422         u32 lp_advertising;
 423
 424         /* Energy efficient ethernet modes which should be prohibited */
 425         u32 eee_broken_modes;
 426
 427         int autoneg;
 428
 429         int link_timeout;
 430
 431 #ifdef CONFIG_LED_TRIGGER_PHY
 432         struct phy_led_trigger *phy_led_triggers;
 433         unsigned int phy_num_led_triggers;
 434         struct phy_led_trigger *last_triggered;
 435 #endif
 436
 437         /*
 438          * Interrupt number for this PHY
 439          * -1 means no interrupt
 440          */
 441         int irq;
 442
 443         /* private data pointer */
 444         /* For use by PHYs to maintain extra state */
 445         void *priv;
 446
 447         /* Interrupt and Polling infrastructure */
 448         struct work_struct phy_queue;
 449         struct delayed_work state_queue;
 450         atomic_t irq_disable;
 451
 452         struct mutex lock;
 453
 454         struct net_device *attached_dev;
 455
 456         u8 mdix;
 457         u8 mdix_ctrl;
 458
 459         void (*adjust_link)(struct net_device *dev);
 460 };
 461 #define to_phy_device(d) container_of(to_mdio_device(d), \
 462                                       struct phy_device, mdio)
 463
 464 /* struct phy_driver: Driver structure for a particular PHY type
 465  *
 466  * driver_data: static driver data
 467  * phy_id: The result of reading the UID registers of this PHY
 468  *   type, and ANDing them with the phy_id_mask.  This driver
 469  *   only works for PHYs with IDs which match this field
 470  * name: The friendly name of this PHY type
 471  * phy_id_mask: Defines the important bits of the phy_id
 472  * features: A list of features (speed, duplex, etc) supported
 473  *   by this PHY
 474  * flags: A bitfield defining certain other features this PHY
 475  *   supports (like interrupts)
 476  *
 477  * The drivers must implement config_aneg and read_status.  All
 478  * other functions are optional. Note that none of these
 479  * functions should be called from interrupt time.  The goal is
 480  * for the bus read/write functions to be able to block when the
 481  * bus transaction is happening, and be freed up by an interrupt
 482  * (The MPC85xx has this ability, though it is not currently
 483  * supported in the driver).
 484  */
 485 struct phy_driver {
 486         struct mdio_driver_common mdiodrv;
 487         u32 phy_id;
 488         char *name;
 489         unsigned int phy_id_mask;
 490         u32 features;
 491         u32 flags;
 492         const void *driver_data;
 493
 494         /*
 495          * Called to issue a PHY software reset
 496          */
 497         int (*soft_reset)(struct phy_device *phydev);
 498
 499         /*
 500          * Called to initialize the PHY,
 501          * including after a reset
 502          */
 503         int (*config_init)(struct phy_device *phydev);
 504
 505         /*
 506          * Called during discovery.  Used to set
 507          * up device-specific structures, if any
 508          */
 509         int (*probe)(struct phy_device *phydev);
 510
 511         /* PHY Power Management */
 512         int (*suspend)(struct phy_device *phydev);
 513         int (*resume)(struct phy_device *phydev);
 514
 515         /*
 516          * Configures the advertisement and resets
 517          * autonegotiation if phydev->autoneg is on,
 518          * forces the speed to the current settings in phydev
 519          * if phydev->autoneg is off
 520          */
 521         int (*config_aneg)(struct phy_device *phydev);
 522
 523         /* Determines the auto negotiation result */
 524         int (*aneg_done)(struct phy_device *phydev);
 525
 526         /* Determines the negotiated speed and duplex */
 527         int (*read_status)(struct phy_device *phydev);
 528
 529         /* Clears any pending interrupts */
 530         int (*ack_interrupt)(struct phy_device *phydev);
 531
 532         /* Enables or disables interrupts */
 533         int (*config_intr)(struct phy_device *phydev);
 534
 535         /*
 536          * Checks if the PHY generated an interrupt.
 537          * For multi-PHY devices with shared PHY interrupt pin
 538          */
 539         int (*did_interrupt)(struct phy_device *phydev);
 540
 541         /* Clears up any memory if needed */
 542         void (*remove)(struct phy_device *phydev);
 543
 544         /* Returns true if this is a suitable driver for the given
 545          * phydev.  If NULL, matching is based on phy_id and
 546          * phy_id_mask.
 547          */
 548         int (*match_phy_device)(struct phy_device *phydev);
 549
 550         /* Handles ethtool queries for hardware time stamping. */
 551         int (*ts_info)(struct phy_device *phydev, struct ethtool_ts_info *ti);
 552
 553         /* Handles SIOCSHWTSTAMP ioctl for hardware time stamping. */
 554         int  (*hwtstamp)(struct phy_device *phydev, struct ifreq *ifr);
 555
 556         /*
 557          * Requests a Rx timestamp for 'skb'. If the skb is accepted,
 558          * the phy driver promises to deliver it using netif_rx() as
 559          * soon as a timestamp becomes available. One of the
 560          * PTP_CLASS_ values is passed in 'type'. The function must
 561          * return true if the skb is accepted for delivery.
 562          */
 563         bool (*rxtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
 564
 565         /*
 566          * Requests a Tx timestamp for 'skb'. The phy driver promises
 567          * to deliver it using skb_complete_tx_timestamp() as soon as a
 568          * timestamp becomes available. One of the PTP_CLASS_ values
 569          * is passed in 'type'.
 570          */
 571         void (*txtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
 572
 573         /* Some devices (e.g. qnap TS-119P II) require PHY register changes to
 574          * enable Wake on LAN, so set_wol is provided to be called in the
 575          * ethernet driver's set_wol function. */
 576         int (*set_wol)(struct phy_device *dev, struct ethtool_wolinfo *wol);
 577
 578         /* See set_wol, but for checking whether Wake on LAN is enabled. */
 579         void (*get_wol)(struct phy_device *dev, struct ethtool_wolinfo *wol);
 580
 581         /*
 582          * Called to inform a PHY device driver when the core is about to
 583          * change the link state. This callback is supposed to be used as
 584          * fixup hook for drivers that need to take action when the link
 585          * state changes. Drivers are by no means allowed to mess with the
 586          * PHY device structure in their implementations.
 587          */
 588         void (*link_change_notify)(struct phy_device *dev);
 589
 590         /* A function provided by a phy specific driver to override the
 591          * the PHY driver framework support for reading a MMD register
 592          * from the PHY. If not supported, return -1. This function is
 593          * optional for PHY specific drivers, if not provided then the
 594          * default MMD read function is used by the PHY framework.
 595          */
 596         int (*read_mmd_indirect)(struct phy_device *dev, int ptrad,
 597                                  int devnum, int regnum);
 598
 599         /* A function provided by a phy specific driver to override the
 600          * the PHY driver framework support for writing a MMD register
 601          * from the PHY. This function is optional for PHY specific drivers,
 602          * if not provided then the default MMD read function is used by
 603          * the PHY framework.
 604          */
 605         void (*write_mmd_indirect)(struct phy_device *dev, int ptrad,
 606                                    int devnum, int regnum, u32 val);
 607
 608         /* Get the size and type of the eeprom contained within a plug-in
 609          * module */
 610         int (*module_info)(struct phy_device *dev,
 611                            struct ethtool_modinfo *modinfo);
 612
 613         /* Get the eeprom information from the plug-in module */
 614         int (*module_eeprom)(struct phy_device *dev,
 615                              struct ethtool_eeprom *ee, u8 *data);
 616
 617         /* Get statistics from the phy using ethtool */
 618         int (*get_sset_count)(struct phy_device *dev);
 619         void (*get_strings)(struct phy_device *dev, u8 *data);
 620         void (*get_stats)(struct phy_device *dev,
 621                           struct ethtool_stats *stats, u64 *data);
 622
 623         /* Get and Set PHY tunables */
 624         int (*get_tunable)(struct phy_device *dev,
 625                            struct ethtool_tunable *tuna, void *data);
 626         int (*set_tunable)(struct phy_device *dev,
 627                             struct ethtool_tunable *tuna,
 628                             const void *data);
 629 };
 630 #define to_phy_driver(d) container_of(to_mdio_common_driver(d),         \
 631                                       struct phy_driver, mdiodrv)
 632
 633 #define PHY_ANY_ID "MATCH ANY PHY"
 634 #define PHY_ANY_UID 0xffffffff
 635
 636 /* A Structure for boards to register fixups with the PHY Lib */
 637 struct phy_fixup {
 638         struct list_head list;
 639         char bus_id[MII_BUS_ID_SIZE + 3];
 640         u32 phy_uid;
 641         u32 phy_uid_mask;
 642         int (*run)(struct phy_device *phydev);
 643 };
 644
 645 /**
 646  * phy_read_mmd - Convenience function for reading a register
 647  * from an MMD on a given PHY.
 648  * @phydev: The phy_device struct
 649  * @devad: The MMD to read from
 650  * @regnum: The register on the MMD to read
 651  *
 652  * Same rules as for phy_read();
 653  */
 654 static inline int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
 655 {
 656         if (!phydev->is_c45)
 657                 return -EOPNOTSUPP;
 658
 659         return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr,
 660                             MII_ADDR_C45 | (devad << 16) | (regnum & 0xffff));
 661 }
 662
 663 /**
 664  * phy_read_mmd_indirect - reads data from the MMD registers
 665  * @phydev: The PHY device bus
 666  * @prtad: MMD Address
 667  * @addr: PHY address on the MII bus
 668  *
 669  * Description: it reads data from the MMD registers (clause 22 to access to
 670  * clause 45) of the specified phy address.
 671  */
 672 int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad);
 673
 674 /**
 675  * phy_read - Convenience function for reading a given PHY register
 676  * @phydev: the phy_device struct
 677  * @regnum: register number to read
 678  *
 679  * NOTE: MUST NOT be called from interrupt context,
 680  * because the bus read/write functions may wait for an interrupt
 681  * to conclude the operation.
 682  */
 683 static inline int phy_read(struct phy_device *phydev, u32 regnum)
 684 {
 685         return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, regnum);
 686 }
 687
 688 /**
 689  * phy_write - Convenience function for writing a given PHY register
 690  * @phydev: the phy_device struct
 691  * @regnum: register number to write
 692  * @val: value to write to @regnum
 693  *
 694  * NOTE: MUST NOT be called from interrupt context,
 695  * because the bus read/write functions may wait for an interrupt
 696  * to conclude the operation.
 697  */
 698 static inline int phy_write(struct phy_device *phydev, u32 regnum, u16 val)
 699 {
 700         return mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, regnum, val);
 701 }
 702
 703 /**
 704  * phy_interrupt_is_valid - Convenience function for testing a given PHY irq
 705  * @phydev: the phy_device struct
 706  *
 707  * NOTE: must be kept in sync with addition/removal of PHY_POLL and
 708  * PHY_IGNORE_INTERRUPT
 709  */
 710 static inline bool phy_interrupt_is_valid(struct phy_device *phydev)
 711 {
 712         return phydev->irq != PHY_POLL && phydev->irq != PHY_IGNORE_INTERRUPT;
 713 }
 714
 715 /**
 716  * phy_is_internal - Convenience function for testing if a PHY is internal
 717  * @phydev: the phy_device struct
 718  */
 719 static inline bool phy_is_internal(struct phy_device *phydev)
 720 {
 721         return phydev->is_internal;
 722 }
 723
 724 /**
 725  * phy_interface_is_rgmii - Convenience function for testing if a PHY interface
 726  * is RGMII (all variants)
 727  * @phydev: the phy_device struct
 728  */
 729 static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
 730 {
 731         return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
 732                 phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
 733 };
 734
 735 /*
 736  * phy_is_pseudo_fixed_link - Convenience function for testing if this
 737  * PHY is the CPU port facing side of an Ethernet switch, or similar.
 738  * @phydev: the phy_device struct
 739  */
 740 static inline bool phy_is_pseudo_fixed_link(struct phy_device *phydev)
 741 {
 742         return phydev->is_pseudo_fixed_link;
 743 }
 744
 745 /**
 746  * phy_write_mmd - Convenience function for writing a register
 747  * on an MMD on a given PHY.
 748  * @phydev: The phy_device struct
 749  * @devad: The MMD to read from
 750  * @regnum: The register on the MMD to read
 751  * @val: value to write to @regnum
 752  *
 753  * Same rules as for phy_write();
 754  */
 755 static inline int phy_write_mmd(struct phy_device *phydev, int devad,
 756                                 u32 regnum, u16 val)
 757 {
 758         if (!phydev->is_c45)
 759                 return -EOPNOTSUPP;
 760
 761         regnum = MII_ADDR_C45 | ((devad & 0x1f) << 16) | (regnum & 0xffff);
 762
 763         return mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, regnum, val);
 764 }
 765
 766 /**
 767  * phy_write_mmd_indirect - writes data to the MMD registers
 768  * @phydev: The PHY device
 769  * @prtad: MMD Address
 770  * @devad: MMD DEVAD
 771  * @data: data to write in the MMD register
 772  *
 773  * Description: Write data from the MMD registers of the specified
 774  * phy address.
 775  */
 776 void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
 777                             int devad, u32 data);
 778
 779 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
 780                                      bool is_c45,
 781                                      struct phy_c45_device_ids *c45_ids);
 782 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
 783 int phy_device_register(struct phy_device *phy);
 784 void phy_device_remove(struct phy_device *phydev);
 785 int phy_init_hw(struct phy_device *phydev);
 786 int phy_suspend(struct phy_device *phydev);
 787 int phy_resume(struct phy_device *phydev);
 788 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
 789                               phy_interface_t interface);
 790 struct phy_device *phy_find_first(struct mii_bus *bus);
 791 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
 792                       u32 flags, phy_interface_t interface);
 793 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
 794                        void (*handler)(struct net_device *),
 795                        phy_interface_t interface);
 796 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
 797                                void (*handler)(struct net_device *),
 798                                phy_interface_t interface);
 799 void phy_disconnect(struct phy_device *phydev);
 800 void phy_detach(struct phy_device *phydev);
 801 void phy_start(struct phy_device *phydev);
 802 void phy_stop(struct phy_device *phydev);
 803 int phy_start_aneg(struct phy_device *phydev);
 804 int phy_aneg_done(struct phy_device *phydev);
 805
 806 int phy_stop_interrupts(struct phy_device *phydev);
 807
 808 static inline int phy_read_status(struct phy_device *phydev)
 809 {
 810         if (!phydev->drv)
 811                 return -EIO;
 812
 813         return phydev->drv->read_status(phydev);
 814 }
 815
 816 #define phydev_err(_phydev, format, args...)    \
 817         dev_err(&_phydev->mdio.dev, format, ##args)
 818
 819 #define phydev_dbg(_phydev, format, args...)    \
 820         dev_dbg(&_phydev->mdio.dev, format, ##args);
 821
 822 static inline const char *phydev_name(const struct phy_device *phydev)
 823 {
 824         return dev_name(&phydev->mdio.dev);
 825 }
 826
 827 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
 828         __printf(2, 3);
 829 void phy_attached_info(struct phy_device *phydev);
 830 int genphy_config_init(struct phy_device *phydev);
 831 int genphy_setup_forced(struct phy_device *phydev);
 832 int genphy_restart_aneg(struct phy_device *phydev);
 833 int genphy_config_aneg(struct phy_device *phydev);
 834 int genphy_aneg_done(struct phy_device *phydev);
 835 int genphy_update_link(struct phy_device *phydev);
 836 int genphy_read_status(struct phy_device *phydev);
 837 int genphy_suspend(struct phy_device *phydev);
 838 int genphy_resume(struct phy_device *phydev);
 839 int genphy_soft_reset(struct phy_device *phydev);
 840 static inline int genphy_no_soft_reset(struct phy_device *phydev)
 841 {
 842         return 0;
 843 }
 844 void phy_driver_unregister(struct phy_driver *drv);
 845 void phy_drivers_unregister(struct phy_driver *drv, int n);
 846 int phy_driver_register(struct phy_driver *new_driver, struct module *owner);
 847 int phy_drivers_register(struct phy_driver *new_driver, int n,
 848                          struct module *owner);
 849 void phy_state_machine(struct work_struct *work);
 850 void phy_change(struct phy_device *phydev);
 851 void phy_change_work(struct work_struct *work);
 852 void phy_mac_interrupt(struct phy_device *phydev, int new_link);
 853 void phy_start_machine(struct phy_device *phydev);
 854 void phy_stop_machine(struct phy_device *phydev);
 855 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
 856 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
 857 int phy_ethtool_ksettings_get(struct phy_device *phydev,
 858                               struct ethtool_link_ksettings *cmd);
 859 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 860                               const struct ethtool_link_ksettings *cmd);
 861 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd);
 862 int phy_start_interrupts(struct phy_device *phydev);
 863 void phy_print_status(struct phy_device *phydev);
 864 void phy_device_free(struct phy_device *phydev);
 865 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
 866
 867 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
 868                        int (*run)(struct phy_device *));
 869 int phy_register_fixup_for_id(const char *bus_id,
 870                               int (*run)(struct phy_device *));
 871 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
 872                                int (*run)(struct phy_device *));
 873
 874 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask);
 875 int phy_unregister_fixup_for_id(const char *bus_id);
 876 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask);
 877
 878 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable);
 879 int phy_get_eee_err(struct phy_device *phydev);
 880 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data);
 881 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data);
 882 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol);
 883 void phy_ethtool_get_wol(struct phy_device *phydev,
 884                          struct ethtool_wolinfo *wol);
 885 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
 886                                    struct ethtool_link_ksettings *cmd);
 887 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
 888                                    const struct ethtool_link_ksettings *cmd);
 889 int phy_ethtool_nway_reset(struct net_device *ndev);
 890
 891 int __init mdio_bus_init(void);
 892 void mdio_bus_exit(void);
 893
 894 extern struct bus_type mdio_bus_type;
 895
 896 struct mdio_board_info {
 897         const char      *bus_id;
 898         char            modalias[MDIO_NAME_SIZE];
 899         int             mdio_addr;
 900         const void      *platform_data;
 901 };
 902
 903 #if IS_ENABLED(CONFIG_PHYLIB)
 904 int mdiobus_register_board_info(const struct mdio_board_info *info,
 905                                 unsigned int n);
 906 #else
 907 static inline int mdiobus_register_board_info(const struct mdio_board_info *i,
 908                                               unsigned int n)
 909 {
 910         return 0;
 911 }
 912 #endif
 913
 914
 915 /**
 916  * module_phy_driver() - Helper macro for registering PHY drivers
 917  * @__phy_drivers: array of PHY drivers to register
 918  *
 919  * Helper macro for PHY drivers which do not do anything special in module
 920  * init/exit. Each module may only use this macro once, and calling it
 921  * replaces module_init() and module_exit().
 922  */
 923 #define phy_module_driver(__phy_drivers, __count)                       \
 924 static int __init phy_module_init(void)                                 \
 925 {                                                                       \
 926         return phy_drivers_register(__phy_drivers, __count, THIS_MODULE); \
 927 }                                                                       \
 928 module_init(phy_module_init);                                           \
 929 static void __exit phy_module_exit(void)                                \
 930 {                                                                       \
 931         phy_drivers_unregister(__phy_drivers, __count);                 \
 932 }                                                                       \
 933 module_exit(phy_module_exit)
 934
 935 #define module_phy_driver(__phy_drivers)                                \
 936         phy_module_driver(__phy_drivers, ARRAY_SIZE(__phy_drivers))
 937
 938 #endif /* __PHY_H */