include/phy.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright 2011 Freescale Semiconductor, Inc.
   4  *      Andy Fleming <afleming@gmail.com>
   5  *
   6  * This file pretty much stolen from Linux's mii.h/ethtool.h/phy.h
   7  */
   8
   9 #ifndef _PHY_H
  10 #define _PHY_H
  11
  12 #include <log.h>
  13 #include <phy_interface.h>
  14 #include <dm/ofnode.h>
  15 #include <dm/read.h>
  16 #include <linux/errno.h>
  17 #include <linux/list.h>
  18 #include <linux/mii.h>
  19 #include <linux/ethtool.h>
  20 #include <linux/mdio.h>
  21
  22 struct udevice;
  23
  24 #define PHY_FIXED_ID            0xa5a55a5a
  25 #define PHY_NCSI_ID            0xbeefcafe
  26
  27 /*
  28  * There is no actual id for this.
  29  * This is just a dummy id for gmii2rgmmi converter.
  30  */
  31 #define PHY_GMII2RGMII_ID       0x5a5a5a5a
  32
  33 #define PHY_MAX_ADDR 32
  34
  35 #define PHY_FLAG_BROKEN_RESET   (1 << 0) /* soft reset not supported */
  36
  37 #define PHY_DEFAULT_FEATURES    (SUPPORTED_Autoneg | \
  38                                  SUPPORTED_TP | \
  39                                  SUPPORTED_MII)
  40
  41 #define PHY_10BT_FEATURES       (SUPPORTED_10baseT_Half | \
  42                                  SUPPORTED_10baseT_Full)
  43
  44 #define PHY_100BT_FEATURES      (SUPPORTED_100baseT_Half | \
  45                                  SUPPORTED_100baseT_Full)
  46
  47 #define PHY_1000BT_FEATURES     (SUPPORTED_1000baseT_Half | \
  48                                  SUPPORTED_1000baseT_Full)
  49
  50 #define PHY_BASIC_FEATURES      (PHY_10BT_FEATURES | \
  51                                  PHY_100BT_FEATURES | \
  52                                  PHY_DEFAULT_FEATURES)
  53
  54 #define PHY_100BT1_FEATURES     (SUPPORTED_TP | \
  55                                  SUPPORTED_MII | \
  56                                  SUPPORTED_100baseT_Full)
  57
  58 #define PHY_GBIT_FEATURES       (PHY_BASIC_FEATURES | \
  59                                  PHY_1000BT_FEATURES)
  60
  61 #define PHY_10G_FEATURES        (PHY_GBIT_FEATURES | \
  62                                 SUPPORTED_10000baseT_Full)
  63
  64 #ifndef PHY_ANEG_TIMEOUT
  65 #define PHY_ANEG_TIMEOUT        4000
  66 #endif
  67
  68
  69 struct phy_device;
  70
  71 #define MDIO_NAME_LEN 32
  72
  73 struct mii_dev {
  74         struct list_head link;
  75         char name[MDIO_NAME_LEN];
  76         void *priv;
  77         int (*read)(struct mii_dev *bus, int addr, int devad, int reg);
  78         int (*write)(struct mii_dev *bus, int addr, int devad, int reg,
  79                         u16 val);
  80         int (*reset)(struct mii_dev *bus);
  81         struct phy_device *phymap[PHY_MAX_ADDR];
  82         u32 phy_mask;
  83 };
  84
  85 /* struct phy_driver: a structure which defines PHY behavior
  86  *
  87  * uid will contain a number which represents the PHY.  During
  88  * startup, the driver will poll the PHY to find out what its
  89  * UID--as defined by registers 2 and 3--is.  The 32-bit result
  90  * gotten from the PHY will be masked to
  91  * discard any bits which may change based on revision numbers
  92  * unimportant to functionality
  93  *
  94  */
  95 struct phy_driver {
  96         char *name;
  97         unsigned int uid;
  98         unsigned int mask;
  99         unsigned int mmds;
 100
 101         u32 features;
 102
 103         /* Called to do any driver startup necessities */
 104         /* Will be called during phy_connect */
 105         int (*probe)(struct phy_device *phydev);
 106
 107         /* Called to configure the PHY, and modify the controller
 108          * based on the results.  Should be called after phy_connect */
 109         int (*config)(struct phy_device *phydev);
 110
 111         /* Called when starting up the controller */
 112         int (*startup)(struct phy_device *phydev);
 113
 114         /* Called when bringing down the controller */
 115         int (*shutdown)(struct phy_device *phydev);
 116
 117         int (*readext)(struct phy_device *phydev, int addr, int devad, int reg);
 118         int (*writeext)(struct phy_device *phydev, int addr, int devad, int reg,
 119                         u16 val);
 120
 121         /* Phy specific driver override for reading a MMD register */
 122         int (*read_mmd)(struct phy_device *phydev, int devad, int reg);
 123
 124         /* Phy specific driver override for writing a MMD register */
 125         int (*write_mmd)(struct phy_device *phydev, int devad, int reg,
 126                          u16 val);
 127
 128         struct list_head list;
 129
 130         /* driver private data */
 131         ulong data;
 132 };
 133
 134 struct phy_device {
 135         /* Information about the PHY type */
 136         /* And management functions */
 137         struct mii_dev *bus;
 138         struct phy_driver *drv;
 139         void *priv;
 140
 141 #ifdef CONFIG_DM_ETH
 142         struct udevice *dev;
 143         ofnode node;
 144 #else
 145         struct eth_device *dev;
 146 #endif
 147
 148         /* forced speed & duplex (no autoneg)
 149          * partner speed & duplex & pause (autoneg)
 150          */
 151         int speed;
 152         int duplex;
 153
 154         /* The most recently read link state */
 155         int link;
 156         int port;
 157         phy_interface_t interface;
 158
 159         u32 advertising;
 160         u32 supported;
 161         u32 mmds;
 162
 163         int autoneg;
 164         int addr;
 165         int pause;
 166         int asym_pause;
 167         u32 phy_id;
 168         bool is_c45;
 169         u32 flags;
 170 };
 171
 172 struct fixed_link {
 173         int phy_id;
 174         int duplex;
 175         int link_speed;
 176         int pause;
 177         int asym_pause;
 178 };
 179
 180 /**
 181  * phy_read - Convenience function for reading a given PHY register
 182  * @phydev: the phy_device struct
 183  * @devad: The MMD to read from
 184  * @regnum: register number to read
 185  * @return: value for success or negative errno for failure
 186  */
 187 static inline int phy_read(struct phy_device *phydev, int devad, int regnum)
 188 {
 189         struct mii_dev *bus = phydev->bus;
 190
 191         if (!bus || !bus->read) {
 192                 debug("%s: No bus configured\n", __func__);
 193                 return -1;
 194         }
 195
 196         return bus->read(bus, phydev->addr, devad, regnum);
 197 }
 198
 199 /**
 200  * phy_write - Convenience function for writing a given PHY register
 201  * @phydev: the phy_device struct
 202  * @devad: The MMD to read from
 203  * @regnum: register number to write
 204  * @val: value to write to @regnum
 205  * @return: 0 for success or negative errno for failure
 206  */
 207 static inline int phy_write(struct phy_device *phydev, int devad, int regnum,
 208                         u16 val)
 209 {
 210         struct mii_dev *bus = phydev->bus;
 211
 212         if (!bus || !bus->write) {
 213                 debug("%s: No bus configured\n", __func__);
 214                 return -1;
 215         }
 216
 217         return bus->write(bus, phydev->addr, devad, regnum, val);
 218 }
 219
 220 /**
 221  * phy_mmd_start_indirect - Convenience function for writing MMD registers
 222  * @phydev: the phy_device struct
 223  * @devad: The MMD to read from
 224  * @regnum: register number to write
 225  * @return: None
 226  */
 227 static inline void phy_mmd_start_indirect(struct phy_device *phydev, int devad,
 228                                           int regnum)
 229 {
 230         /* Write the desired MMD Devad */
 231         phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_CTRL, devad);
 232
 233         /* Write the desired MMD register address */
 234         phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_DATA, regnum);
 235
 236         /* Select the Function : DATA with no post increment */
 237         phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_CTRL,
 238                   (devad | MII_MMD_CTRL_NOINCR));
 239 }
 240
 241 /**
 242  * phy_read_mmd - Convenience function for reading a register
 243  * from an MMD on a given PHY.
 244  * @phydev: The phy_device struct
 245  * @devad: The MMD to read from
 246  * @regnum: The register on the MMD to read
 247  * @return: Value for success or negative errno for failure
 248  */
 249 static inline int phy_read_mmd(struct phy_device *phydev, int devad,
 250                                int regnum)
 251 {
 252         struct phy_driver *drv = phydev->drv;
 253
 254         if (regnum > (u16)~0 || devad > 32)
 255                 return -EINVAL;
 256
 257         /* driver-specific access */
 258         if (drv->read_mmd)
 259                 return drv->read_mmd(phydev, devad, regnum);
 260
 261         /* direct C45 / C22 access */
 262         if ((drv->features & PHY_10G_FEATURES) == PHY_10G_FEATURES ||
 263             devad == MDIO_DEVAD_NONE || !devad)
 264                 return phy_read(phydev, devad, regnum);
 265
 266         /* indirect C22 access */
 267         phy_mmd_start_indirect(phydev, devad, regnum);
 268
 269         /* Read the content of the MMD's selected register */
 270         return phy_read(phydev, MDIO_DEVAD_NONE, MII_MMD_DATA);
 271 }
 272
 273 /**
 274  * phy_write_mmd - Convenience function for writing a register
 275  * on an MMD on a given PHY.
 276  * @phydev: The phy_device struct
 277  * @devad: The MMD to read from
 278  * @regnum: The register on the MMD to read
 279  * @val: value to write to @regnum
 280  * @return: 0 for success or negative errno for failure
 281  */
 282 static inline int phy_write_mmd(struct phy_device *phydev, int devad,
 283                                 int regnum, u16 val)
 284 {
 285         struct phy_driver *drv = phydev->drv;
 286
 287         if (regnum > (u16)~0 || devad > 32)
 288                 return -EINVAL;
 289
 290         /* driver-specific access */
 291         if (drv->write_mmd)
 292                 return drv->write_mmd(phydev, devad, regnum, val);
 293
 294         /* direct C45 / C22 access */
 295         if ((drv->features & PHY_10G_FEATURES) == PHY_10G_FEATURES ||
 296             devad == MDIO_DEVAD_NONE || !devad)
 297                 return phy_write(phydev, devad, regnum, val);
 298
 299         /* indirect C22 access */
 300         phy_mmd_start_indirect(phydev, devad, regnum);
 301
 302         /* Write the data into MMD's selected register */
 303         return phy_write(phydev, MDIO_DEVAD_NONE, MII_MMD_DATA, val);
 304 }
 305
 306 /**
 307  * phy_set_bits_mmd - Convenience function for setting bits in a register
 308  * on MMD
 309  * @phydev: the phy_device struct
 310  * @devad: the MMD containing register to modify
 311  * @regnum: register number to modify
 312  * @val: bits to set
 313  * @return: 0 for success or negative errno for failure
 314  */
 315 static inline int phy_set_bits_mmd(struct phy_device *phydev, int devad,
 316                                    u32 regnum, u16 val)
 317 {
 318         int value, ret;
 319
 320         value = phy_read_mmd(phydev, devad, regnum);
 321         if (value < 0)
 322                 return value;
 323
 324         value |= val;
 325
 326         ret = phy_write_mmd(phydev, devad, regnum, value);
 327         if (ret < 0)
 328                 return ret;
 329
 330         return 0;
 331 }
 332
 333 /**
 334  * phy_clear_bits_mmd - Convenience function for clearing bits in a register
 335  * on MMD
 336  * @phydev: the phy_device struct
 337  * @devad: the MMD containing register to modify
 338  * @regnum: register number to modify
 339  * @val: bits to clear
 340  * @return: 0 for success or negative errno for failure
 341  */
 342 static inline int phy_clear_bits_mmd(struct phy_device *phydev, int devad,
 343                                      u32 regnum, u16 val)
 344 {
 345         int value, ret;
 346
 347         value = phy_read_mmd(phydev, devad, regnum);
 348         if (value < 0)
 349                 return value;
 350
 351         value &= ~val;
 352
 353         ret = phy_write_mmd(phydev, devad, regnum, value);
 354         if (ret < 0)
 355                 return ret;
 356
 357         return 0;
 358 }
 359
 360 #ifdef CONFIG_PHYLIB_10G
 361 extern struct phy_driver gen10g_driver;
 362
 363 /*
 364  * List all 10G interfaces here, the assumption being that PHYs on these
 365  * interfaces are C45
 366  */
 367 static inline int is_10g_interface(phy_interface_t interface)
 368 {
 369         return interface == PHY_INTERFACE_MODE_XGMII ||
 370                interface == PHY_INTERFACE_MODE_USXGMII ||
 371                interface == PHY_INTERFACE_MODE_10GBASER;
 372 }
 373
 374 #endif
 375
 376 /**
 377  * phy_init() - Initializes the PHY drivers
 378  * This function registers all available PHY drivers
 379  *
 380  * @return: 0 if OK, -ve on error
 381  */
 382 int phy_init(void);
 383
 384 /**
 385  * phy_reset() - Resets the specified PHY
 386  * Issues a reset of the PHY and waits for it to complete
 387  *
 388  * @phydev:     PHY to reset
 389  * @return: 0 if OK, -ve on error
 390  */
 391 int phy_reset(struct phy_device *phydev);
 392
 393 /**
 394  * phy_find_by_mask() - Searches for a PHY on the specified MDIO bus
 395  * The function checks the PHY addresses flagged in phy_mask and returns a
 396  * phy_device pointer if it detects a PHY.
 397  * This function should only be called if just one PHY is expected to be present
 398  * in the set of addresses flagged in phy_mask.  If multiple PHYs are present,
 399  * it is undefined which of these PHYs is returned.
 400  *
 401  * @bus:        MII/MDIO bus to scan
 402  * @phy_mask:   bitmap of PYH addresses to scan
 403  * @interface:  type of MAC-PHY interface
 404  * @return: pointer to phy_device if a PHY is found, or NULL otherwise
 405  */
 406 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 407                 phy_interface_t interface);
 408
 409 #ifdef CONFIG_PHY_FIXED
 410
 411 /**
 412  * fixed_phy_create() - create an unconnected fixed-link pseudo-PHY device
 413  * @node: OF node for the container of the fixed-link node
 414  *
 415  * Description: Creates a struct phy_device based on a fixed-link of_node
 416  * description. Can be used without phy_connect by drivers which do not expose
 417  * a UCLASS_ETH udevice.
 418  */
 419 struct phy_device *fixed_phy_create(ofnode node);
 420
 421 #else
 422
 423 static inline struct phy_device *fixed_phy_create(ofnode node)
 424 {
 425         return NULL;
 426 }
 427
 428 #endif
 429
 430 #ifdef CONFIG_DM_ETH
 431
 432 /**
 433  * phy_connect_dev() - Associates the given pair of PHY and Ethernet devices
 434  * @phydev:     PHY device
 435  * @dev:        Ethernet device
 436  */
 437 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev);
 438
 439 /**
 440  * phy_connect() - Creates a PHY device for the Ethernet interface
 441  * Creates a PHY device for the PHY at the given address, if one doesn't exist
 442  * already, and associates it with the Ethernet device.
 443  * The function may be called with addr <= 0, in this case addr value is ignored
 444  * and the bus is scanned to detect a PHY.  Scanning should only be used if only
 445  * one PHY is expected to be present on the MDIO bus, otherwise it is undefined
 446  * which PHY is returned.
 447  *
 448  * @bus:        MII/MDIO bus that hosts the PHY
 449  * @addr:       PHY address on MDIO bus
 450  * @dev:        Ethernet device to associate to the PHY
 451  * @interface:  type of MAC-PHY interface
 452  * @return: pointer to phy_device if a PHY is found, or NULL otherwise
 453  */
 454 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 455                                 struct udevice *dev,
 456                                 phy_interface_t interface);
 457 /**
 458  * phy_device_create() - Create a PHY device
 459  *
 460  * @bus:                MII/MDIO bus that hosts the PHY
 461  * @addr:               PHY address on MDIO bus
 462  * @phy_id:             where to store the ID retrieved
 463  * @is_c45:             Device Identifiers if is_c45
 464  * @interface:          interface between the MAC and PHY
 465  * @return: pointer to phy_device if a PHY is found, or NULL otherwise
 466  */
 467 struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 468                                      u32 phy_id, bool is_c45,
 469                                      phy_interface_t interface);
 470
 471 /**
 472  * phy_connect_phy_id() - Connect to phy device by reading PHY id
 473  *                        from phy node.
 474  *
 475  * @bus:                MII/MDIO bus that hosts the PHY
 476  * @dev:                Ethernet device to associate to the PHY
 477  * @interface:          Interface between the MAC and PHY
 478  * @return:             pointer to phy_device if a PHY is found,
 479  *                      or NULL otherwise
 480  */
 481 struct phy_device *phy_connect_phy_id(struct mii_dev *bus, struct udevice *dev,
 482                                       int phyaddr, phy_interface_t interface);
 483
 484 static inline ofnode phy_get_ofnode(struct phy_device *phydev)
 485 {
 486         if (ofnode_valid(phydev->node))
 487                 return phydev->node;
 488         else
 489                 return dev_ofnode(phydev->dev);
 490 }
 491 #else
 492
 493 /**
 494  * phy_connect_dev() - Associates the given pair of PHY and Ethernet devices
 495  * @phydev:     PHY device
 496  * @dev:        Ethernet device
 497  */
 498 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev);
 499
 500 /**
 501  * phy_connect() - Creates a PHY device for the Ethernet interface
 502  * Creates a PHY device for the PHY at the given address, if one doesn't exist
 503  * already, and associates it with the Ethernet device.
 504  * The function may be called with addr <= 0, in this case addr value is ignored
 505  * and the bus is scanned to detect a PHY.  Scanning should only be used if only
 506  * one PHY is expected to be present on the MDIO bus, otherwise it is undefined
 507  * which PHY is returned.
 508  *
 509  * @bus:        MII/MDIO bus that hosts the PHY
 510  * @addr:       PHY address on MDIO bus
 511  * @dev:        Ethernet device to associate to the PHY
 512  * @interface:  type of MAC-PHY interface
 513  * @return: pointer to phy_device if a PHY is found, or NULL otherwise
 514  */
 515 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 516                                 struct eth_device *dev,
 517                                 phy_interface_t interface);
 518
 519 static inline ofnode phy_get_ofnode(struct phy_device *phydev)
 520 {
 521         return ofnode_null();
 522 }
 523 #endif
 524 int phy_startup(struct phy_device *phydev);
 525 int phy_config(struct phy_device *phydev);
 526 int phy_shutdown(struct phy_device *phydev);
 527 int phy_register(struct phy_driver *drv);
 528 int phy_set_supported(struct phy_device *phydev, u32 max_speed);
 529 int phy_modify(struct phy_device *phydev, int devad, int regnum, u16 mask,
 530                u16 set);
 531 int genphy_config_aneg(struct phy_device *phydev);
 532 int genphy_restart_aneg(struct phy_device *phydev);
 533 int genphy_update_link(struct phy_device *phydev);
 534 int genphy_parse_link(struct phy_device *phydev);
 535 int genphy_config(struct phy_device *phydev);
 536 int genphy_startup(struct phy_device *phydev);
 537 int genphy_shutdown(struct phy_device *phydev);
 538 int gen10g_config(struct phy_device *phydev);
 539 int gen10g_startup(struct phy_device *phydev);
 540 int gen10g_shutdown(struct phy_device *phydev);
 541 int gen10g_discover_mmds(struct phy_device *phydev);
 542
 543 int phy_b53_init(void);
 544 int phy_mv88e61xx_init(void);
 545 int phy_aquantia_init(void);
 546 int phy_atheros_init(void);
 547 int phy_broadcom_init(void);
 548 int phy_cortina_init(void);
 549 int phy_cortina_access_init(void);
 550 int phy_davicom_init(void);
 551 int phy_et1011c_init(void);
 552 int phy_lxt_init(void);
 553 int phy_marvell_init(void);
 554 int phy_micrel_ksz8xxx_init(void);
 555 int phy_micrel_ksz90x1_init(void);
 556 int phy_meson_gxl_init(void);
 557 int phy_natsemi_init(void);
 558 int phy_nxp_c45_tja11xx_init(void);
 559 int phy_nxp_tja11xx_init(void);
 560 int phy_realtek_init(void);
 561 int phy_smsc_init(void);
 562 int phy_teranetics_init(void);
 563 int phy_ti_init(void);
 564 int phy_vitesse_init(void);
 565 int phy_xilinx_init(void);
 566 int phy_mscc_init(void);
 567 int phy_fixed_init(void);
 568 int phy_ncsi_init(void);
 569 int phy_xilinx_gmii2rgmii_init(void);
 570
 571 int board_phy_config(struct phy_device *phydev);
 572 int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id);
 573
 574 /**
 575  * phy_get_interface_by_name() - Look up a PHY interface name
 576  *
 577  * @str:        PHY interface name, e.g. "mii"
 578  * @return: PHY_INTERFACE_MODE_... value, or -1 if not found
 579  */
 580 int phy_get_interface_by_name(const char *str);
 581
 582 /**
 583  * phy_interface_is_rgmii - Convenience function for testing if a PHY interface
 584  * is RGMII (all variants)
 585  * @phydev: the phy_device struct
 586  * @return: true if MII bus is RGMII or false if it is not
 587  */
 588 static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
 589 {
 590         return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
 591                 phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
 592 }
 593
 594 /**
 595  * phy_interface_is_sgmii - Convenience function for testing if a PHY interface
 596  * is SGMII (all variants)
 597  * @phydev: the phy_device struct
 598  * @return: true if MII bus is SGMII or false if it is not
 599  */
 600 static inline bool phy_interface_is_sgmii(struct phy_device *phydev)
 601 {
 602         return phydev->interface >= PHY_INTERFACE_MODE_SGMII &&
 603                 phydev->interface <= PHY_INTERFACE_MODE_QSGMII;
 604 }
 605
 606 /* PHY UIDs for various PHYs that are referenced in external code */
 607 #define PHY_UID_CS4340          0x13e51002
 608 #define PHY_UID_CS4223          0x03e57003
 609 #define PHY_UID_TN2020          0x00a19410
 610 #define PHY_UID_IN112525_S03    0x02107440
 611
 612 #endif