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