include/linux/mdio.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * linux/mdio.h: definitions for MDIO (clause 45) transceivers
   4  * Copyright 2006-2009 Solarflare Communications Inc.
   5  */
   6 #ifndef __LINUX_MDIO_H__
   7 #define __LINUX_MDIO_H__
   8
   9 #include <uapi/linux/mdio.h>
  10 #include <linux/bitfield.h>
  11 #include <linux/mod_devicetable.h>
  12
  13 struct gpio_desc;
  14 struct mii_bus;
  15 struct reset_control;
  16
  17 /* Multiple levels of nesting are possible. However typically this is
  18  * limited to nested DSA like layer, a MUX layer, and the normal
  19  * user. Instead of trying to handle the general case, just define
  20  * these cases.
  21  */
  22 enum mdio_mutex_lock_class {
  23         MDIO_MUTEX_NORMAL,
  24         MDIO_MUTEX_MUX,
  25         MDIO_MUTEX_NESTED,
  26 };
  27
  28 struct mdio_device {
  29         struct device dev;
  30
  31         struct mii_bus *bus;
  32         char modalias[MDIO_NAME_SIZE];
  33
  34         int (*bus_match)(struct device *dev, const struct device_driver *drv);
  35         void (*device_free)(struct mdio_device *mdiodev);
  36         void (*device_remove)(struct mdio_device *mdiodev);
  37
  38         /* Bus address of the MDIO device (0-31) */
  39         int addr;
  40         int flags;
  41         int reset_state;
  42         struct gpio_desc *reset_gpio;
  43         struct reset_control *reset_ctrl;
  44         unsigned int reset_assert_delay;
  45         unsigned int reset_deassert_delay;
  46 };
  47
  48 static inline struct mdio_device *to_mdio_device(const struct device *dev)
  49 {
  50         return container_of(dev, struct mdio_device, dev);
  51 }
  52
  53 /* struct mdio_driver_common: Common to all MDIO drivers */
  54 struct mdio_driver_common {
  55         struct device_driver driver;
  56         int flags;
  57 };
  58 #define MDIO_DEVICE_FLAG_PHY            1
  59
  60 #define to_mdio_common_driver(__drv_c)  container_of_const(__drv_c, struct mdio_driver_common,  \
  61                                                            driver)
  62
  63 /* struct mdio_driver: Generic MDIO driver */
  64 struct mdio_driver {
  65         struct mdio_driver_common mdiodrv;
  66
  67         /*
  68          * Called during discovery.  Used to set
  69          * up device-specific structures, if any
  70          */
  71         int (*probe)(struct mdio_device *mdiodev);
  72
  73         /* Clears up any memory if needed */
  74         void (*remove)(struct mdio_device *mdiodev);
  75
  76         /* Quiesces the device on system shutdown, turns off interrupts etc */
  77         void (*shutdown)(struct mdio_device *mdiodev);
  78 };
  79
  80 #define to_mdio_driver(__drv_m) container_of_const(to_mdio_common_driver(__drv_m),      \
  81                                                    struct mdio_driver, mdiodrv)
  82
  83 /* device driver data */
  84 static inline void mdiodev_set_drvdata(struct mdio_device *mdio, void *data)
  85 {
  86         dev_set_drvdata(&mdio->dev, data);
  87 }
  88
  89 static inline void *mdiodev_get_drvdata(struct mdio_device *mdio)
  90 {
  91         return dev_get_drvdata(&mdio->dev);
  92 }
  93
  94 void mdio_device_free(struct mdio_device *mdiodev);
  95 struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr);
  96 int mdio_device_register(struct mdio_device *mdiodev);
  97 void mdio_device_remove(struct mdio_device *mdiodev);
  98 void mdio_device_reset(struct mdio_device *mdiodev, int value);
  99 int mdio_driver_register(struct mdio_driver *drv);
 100 void mdio_driver_unregister(struct mdio_driver *drv);
 101 int mdio_device_bus_match(struct device *dev, const struct device_driver *drv);
 102
 103 static inline void mdio_device_get(struct mdio_device *mdiodev)
 104 {
 105         get_device(&mdiodev->dev);
 106 }
 107
 108 static inline void mdio_device_put(struct mdio_device *mdiodev)
 109 {
 110         mdio_device_free(mdiodev);
 111 }
 112
 113 static inline bool mdio_phy_id_is_c45(int phy_id)
 114 {
 115         return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
 116 }
 117
 118 static inline __u16 mdio_phy_id_prtad(int phy_id)
 119 {
 120         return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
 121 }
 122
 123 static inline __u16 mdio_phy_id_devad(int phy_id)
 124 {
 125         return phy_id & MDIO_PHY_ID_DEVAD;
 126 }
 127
 128 /**
 129  * struct mdio_if_info - Ethernet controller MDIO interface
 130  * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
 131  * @mmds: Mask of MMDs expected to be present in the PHY.  This must be
 132  *      non-zero unless @prtad = %MDIO_PRTAD_NONE.
 133  * @mode_support: MDIO modes supported.  If %MDIO_SUPPORTS_C22 is set then
 134  *      MII register access will be passed through with @devad =
 135  *      %MDIO_DEVAD_NONE.  If %MDIO_EMULATE_C22 is set then access to
 136  *      commonly used clause 22 registers will be translated into
 137  *      clause 45 registers.
 138  * @dev: Net device structure
 139  * @mdio_read: Register read function; returns value or negative error code
 140  * @mdio_write: Register write function; returns 0 or negative error code
 141  */
 142 struct mdio_if_info {
 143         int prtad;
 144         u32 mmds;
 145         unsigned mode_support;
 146
 147         struct net_device *dev;
 148         int (*mdio_read)(struct net_device *dev, int prtad, int devad,
 149                          u16 addr);
 150         int (*mdio_write)(struct net_device *dev, int prtad, int devad,
 151                           u16 addr, u16 val);
 152 };
 153
 154 #define MDIO_PRTAD_NONE                 (-1)
 155 #define MDIO_DEVAD_NONE                 (-1)
 156 #define MDIO_SUPPORTS_C22               1
 157 #define MDIO_SUPPORTS_C45               2
 158 #define MDIO_EMULATE_C22                4
 159
 160 struct ethtool_cmd;
 161 struct ethtool_pauseparam;
 162 extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
 163 extern int mdio_set_flag(const struct mdio_if_info *mdio,
 164                          int prtad, int devad, u16 addr, int mask,
 165                          bool sense);
 166 extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
 167 extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
 168 extern void
 169 mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
 170                                    struct ethtool_link_ksettings *cmd,
 171                                    u32 npage_adv, u32 npage_lpa);
 172
 173 /**
 174  * mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS
 175  * @mdio: MDIO interface
 176  * @cmd: Ethtool request structure
 177  *
 178  * Since the CSRs for auto-negotiation using next pages are not fully
 179  * standardised, this function does not attempt to decode them.  Use
 180  * mdio45_ethtool_ksettings_get_npage() to specify advertisement bits
 181  * from next pages.
 182  */
 183 static inline void
 184 mdio45_ethtool_ksettings_get(const struct mdio_if_info *mdio,
 185                              struct ethtool_link_ksettings *cmd)
 186 {
 187         mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0);
 188 }
 189
 190 extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
 191                           struct mii_ioctl_data *mii_data, int cmd);
 192
 193 /**
 194  * mmd_eee_cap_to_ethtool_sup_t
 195  * @eee_cap: value of the MMD EEE Capability register
 196  *
 197  * A small helper function that translates MMD EEE Capability (3.20) bits
 198  * to ethtool supported settings.
 199  */
 200 static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
 201 {
 202         u32 supported = 0;
 203
 204         if (eee_cap & MDIO_EEE_100TX)
 205                 supported |= SUPPORTED_100baseT_Full;
 206         if (eee_cap & MDIO_EEE_1000T)
 207                 supported |= SUPPORTED_1000baseT_Full;
 208         if (eee_cap & MDIO_EEE_10GT)
 209                 supported |= SUPPORTED_10000baseT_Full;
 210         if (eee_cap & MDIO_EEE_1000KX)
 211                 supported |= SUPPORTED_1000baseKX_Full;
 212         if (eee_cap & MDIO_EEE_10GKX4)
 213                 supported |= SUPPORTED_10000baseKX4_Full;
 214         if (eee_cap & MDIO_EEE_10GKR)
 215                 supported |= SUPPORTED_10000baseKR_Full;
 216
 217         return supported;
 218 }
 219
 220 /**
 221  * mmd_eee_adv_to_ethtool_adv_t
 222  * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
 223  *
 224  * A small helper function that translates the MMD EEE Advertisment (7.60)
 225  * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
 226  * settings.
 227  */
 228 static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
 229 {
 230         u32 adv = 0;
 231
 232         if (eee_adv & MDIO_EEE_100TX)
 233                 adv |= ADVERTISED_100baseT_Full;
 234         if (eee_adv & MDIO_EEE_1000T)
 235                 adv |= ADVERTISED_1000baseT_Full;
 236         if (eee_adv & MDIO_EEE_10GT)
 237                 adv |= ADVERTISED_10000baseT_Full;
 238         if (eee_adv & MDIO_EEE_1000KX)
 239                 adv |= ADVERTISED_1000baseKX_Full;
 240         if (eee_adv & MDIO_EEE_10GKX4)
 241                 adv |= ADVERTISED_10000baseKX4_Full;
 242         if (eee_adv & MDIO_EEE_10GKR)
 243                 adv |= ADVERTISED_10000baseKR_Full;
 244
 245         return adv;
 246 }
 247
 248 /**
 249  * ethtool_adv_to_mmd_eee_adv_t
 250  * @adv: the ethtool advertisement settings
 251  *
 252  * A small helper function that translates ethtool advertisement settings
 253  * to EEE advertisements for the MMD EEE Advertisement (7.60) and
 254  * MMD EEE Link Partner Ability (7.61) registers.
 255  */
 256 static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
 257 {
 258         u16 reg = 0;
 259
 260         if (adv & ADVERTISED_100baseT_Full)
 261                 reg |= MDIO_EEE_100TX;
 262         if (adv & ADVERTISED_1000baseT_Full)
 263                 reg |= MDIO_EEE_1000T;
 264         if (adv & ADVERTISED_10000baseT_Full)
 265                 reg |= MDIO_EEE_10GT;
 266         if (adv & ADVERTISED_1000baseKX_Full)
 267                 reg |= MDIO_EEE_1000KX;
 268         if (adv & ADVERTISED_10000baseKX4_Full)
 269                 reg |= MDIO_EEE_10GKX4;
 270         if (adv & ADVERTISED_10000baseKR_Full)
 271                 reg |= MDIO_EEE_10GKR;
 272
 273         return reg;
 274 }
 275
 276 /**
 277  * linkmode_adv_to_mii_10gbt_adv_t
 278  * @advertising: the linkmode advertisement settings
 279  *
 280  * A small helper function that translates linkmode advertisement
 281  * settings to phy autonegotiation advertisements for the C45
 282  * 10GBASE-T AN CONTROL (7.32) register.
 283  */
 284 static inline u32 linkmode_adv_to_mii_10gbt_adv_t(unsigned long *advertising)
 285 {
 286         u32 result = 0;
 287
 288         if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
 289                               advertising))
 290                 result |= MDIO_AN_10GBT_CTRL_ADV2_5G;
 291         if (linkmode_test_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
 292                               advertising))
 293                 result |= MDIO_AN_10GBT_CTRL_ADV5G;
 294         if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
 295                               advertising))
 296                 result |= MDIO_AN_10GBT_CTRL_ADV10G;
 297
 298         return result;
 299 }
 300
 301 /**
 302  * mii_10gbt_stat_mod_linkmode_lpa_t
 303  * @advertising: target the linkmode advertisement settings
 304  * @lpa: value of the C45 10GBASE-T AN STATUS register
 305  *
 306  * A small helper function that translates C45 10GBASE-T AN STATUS register bits
 307  * to linkmode advertisement settings. Other bits in advertising aren't changed.
 308  */
 309 static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long *advertising,
 310                                                      u32 lpa)
 311 {
 312         linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
 313                          advertising, lpa & MDIO_AN_10GBT_STAT_LP2_5G);
 314         linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
 315                          advertising, lpa & MDIO_AN_10GBT_STAT_LP5G);
 316         linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
 317                          advertising, lpa & MDIO_AN_10GBT_STAT_LP10G);
 318 }
 319
 320 /**
 321  * mii_t1_adv_l_mod_linkmode_t
 322  * @advertising: target the linkmode advertisement settings
 323  * @lpa: value of the BASE-T1 Autonegotiation Advertisement [15:0] Register
 324  *
 325  * A small helper function that translates BASE-T1 Autonegotiation
 326  * Advertisement [15:0] Register bits to linkmode advertisement settings.
 327  * Other bits in advertising aren't changed.
 328  */
 329 static inline void mii_t1_adv_l_mod_linkmode_t(unsigned long *advertising, u32 lpa)
 330 {
 331         linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising,
 332                          lpa & MDIO_AN_T1_ADV_L_PAUSE_CAP);
 333         linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising,
 334                          lpa & MDIO_AN_T1_ADV_L_PAUSE_ASYM);
 335 }
 336
 337 /**
 338  * mii_t1_adv_m_mod_linkmode_t
 339  * @advertising: target the linkmode advertisement settings
 340  * @lpa: value of the BASE-T1 Autonegotiation Advertisement [31:16] Register
 341  *
 342  * A small helper function that translates BASE-T1 Autonegotiation
 343  * Advertisement [31:16] Register bits to linkmode advertisement settings.
 344  * Other bits in advertising aren't changed.
 345  */
 346 static inline void mii_t1_adv_m_mod_linkmode_t(unsigned long *advertising, u32 lpa)
 347 {
 348         linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
 349                          advertising, lpa & MDIO_AN_T1_ADV_M_B10L);
 350         linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
 351                          advertising, lpa & MDIO_AN_T1_ADV_M_100BT1);
 352         linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT,
 353                          advertising, lpa & MDIO_AN_T1_ADV_M_1000BT1);
 354 }
 355
 356 /**
 357  * linkmode_adv_to_mii_t1_adv_l_t
 358  * @advertising: the linkmode advertisement settings
 359  *
 360  * A small helper function that translates linkmode advertisement
 361  * settings to phy autonegotiation advertisements for the
 362  * BASE-T1 Autonegotiation Advertisement [15:0] Register.
 363  */
 364 static inline u32 linkmode_adv_to_mii_t1_adv_l_t(unsigned long *advertising)
 365 {
 366         u32 result = 0;
 367
 368         if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
 369                 result |= MDIO_AN_T1_ADV_L_PAUSE_CAP;
 370         if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
 371                 result |= MDIO_AN_T1_ADV_L_PAUSE_ASYM;
 372
 373         return result;
 374 }
 375
 376 /**
 377  * linkmode_adv_to_mii_t1_adv_m_t
 378  * @advertising: the linkmode advertisement settings
 379  *
 380  * A small helper function that translates linkmode advertisement
 381  * settings to phy autonegotiation advertisements for the
 382  * BASE-T1 Autonegotiation Advertisement [31:16] Register.
 383  */
 384 static inline u32 linkmode_adv_to_mii_t1_adv_m_t(unsigned long *advertising)
 385 {
 386         u32 result = 0;
 387
 388         if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, advertising))
 389                 result |= MDIO_AN_T1_ADV_M_B10L;
 390         if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, advertising))
 391                 result |= MDIO_AN_T1_ADV_M_100BT1;
 392         if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, advertising))
 393                 result |= MDIO_AN_T1_ADV_M_1000BT1;
 394
 395         return result;
 396 }
 397
 398 /**
 399  * mii_eee_cap1_mod_linkmode_t()
 400  * @adv: target the linkmode advertisement settings
 401  * @val: register value
 402  *
 403  * A function that translates value of following registers to the linkmode:
 404  * IEEE 802.3-2018 45.2.3.10 "EEE control and capability 1" register (3.20)
 405  * IEEE 802.3-2018 45.2.7.13 "EEE advertisement 1" register (7.60)
 406  * IEEE 802.3-2018 45.2.7.14 "EEE link partner ability 1" register (7.61)
 407  */
 408 static inline void mii_eee_cap1_mod_linkmode_t(unsigned long *adv, u32 val)
 409 {
 410         linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
 411                          adv, val & MDIO_EEE_100TX);
 412         linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
 413                          adv, val & MDIO_EEE_1000T);
 414         linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
 415                          adv, val & MDIO_EEE_10GT);
 416         linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
 417                          adv, val & MDIO_EEE_1000KX);
 418         linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
 419                          adv, val & MDIO_EEE_10GKX4);
 420         linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
 421                          adv, val & MDIO_EEE_10GKR);
 422 }
 423
 424 /**
 425  * mii_eee_cap2_mod_linkmode_sup_t()
 426  * @adv: target the linkmode settings
 427  * @val: register value
 428  *
 429  * A function that translates value of following registers to the linkmode:
 430  * IEEE 802.3-2022 45.2.3.11 "EEE control and capability 2" register (3.21)
 431  */
 432 static inline void mii_eee_cap2_mod_linkmode_sup_t(unsigned long *adv, u32 val)
 433 {
 434         linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
 435                          adv, val & MDIO_EEE_2_5GT);
 436         linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
 437                          adv, val & MDIO_EEE_5GT);
 438 }
 439
 440 /**
 441  * mii_eee_cap2_mod_linkmode_adv_t()
 442  * @adv: target the linkmode advertisement settings
 443  * @val: register value
 444  *
 445  * A function that translates value of following registers to the linkmode:
 446  * IEEE 802.3-2022 45.2.7.16 "EEE advertisement 2" register (7.62)
 447  * IEEE 802.3-2022 45.2.7.17 "EEE link partner ability 2" register (7.63)
 448  * Note: Currently this function is the same as mii_eee_cap2_mod_linkmode_sup_t.
 449  *       For certain, not yet supported, modes however the bits differ.
 450  *       Therefore create separate functions already.
 451  */
 452 static inline void mii_eee_cap2_mod_linkmode_adv_t(unsigned long *adv, u32 val)
 453 {
 454         linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
 455                          adv, val & MDIO_EEE_2_5GT);
 456         linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
 457                          adv, val & MDIO_EEE_5GT);
 458 }
 459
 460 /**
 461  * linkmode_to_mii_eee_cap1_t()
 462  * @adv: the linkmode advertisement settings
 463  *
 464  * A function that translates linkmode to value for IEEE 802.3-2018 45.2.7.13
 465  * "EEE advertisement 1" register (7.60)
 466  */
 467 static inline u32 linkmode_to_mii_eee_cap1_t(unsigned long *adv)
 468 {
 469         u32 result = 0;
 470
 471         if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, adv))
 472                 result |= MDIO_EEE_100TX;
 473         if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, adv))
 474                 result |= MDIO_EEE_1000T;
 475         if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, adv))
 476                 result |= MDIO_EEE_10GT;
 477         if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, adv))
 478                 result |= MDIO_EEE_1000KX;
 479         if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, adv))
 480                 result |= MDIO_EEE_10GKX4;
 481         if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, adv))
 482                 result |= MDIO_EEE_10GKR;
 483
 484         return result;
 485 }
 486
 487 /**
 488  * linkmode_to_mii_eee_cap2_t()
 489  * @adv: the linkmode advertisement settings
 490  *
 491  * A function that translates linkmode to value for IEEE 802.3-2022 45.2.7.16
 492  * "EEE advertisement 2" register (7.62)
 493  */
 494 static inline u32 linkmode_to_mii_eee_cap2_t(unsigned long *adv)
 495 {
 496         u32 result = 0;
 497
 498         if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, adv))
 499                 result |= MDIO_EEE_2_5GT;
 500         if (linkmode_test_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, adv))
 501                 result |= MDIO_EEE_5GT;
 502
 503         return result;
 504 }
 505
 506 /**
 507  * mii_10base_t1_adv_mod_linkmode_t()
 508  * @adv: linkmode advertisement settings
 509  * @val: register value
 510  *
 511  * A function that translates IEEE 802.3cg-2019 45.2.7.26 "10BASE-T1 AN status"
 512  * register (7.527) value to the linkmode.
 513  */
 514 static inline void mii_10base_t1_adv_mod_linkmode_t(unsigned long *adv, u16 val)
 515 {
 516         linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
 517                          adv, val & MDIO_AN_10BT1_AN_CTRL_ADV_EEE_T1L);
 518 }
 519
 520 /**
 521  * linkmode_adv_to_mii_10base_t1_t()
 522  * @adv: linkmode advertisement settings
 523  *
 524  * A function that translates the linkmode to IEEE 802.3cg-2019 45.2.7.25
 525  * "10BASE-T1 AN control" register (7.526) value.
 526  */
 527 static inline u32 linkmode_adv_to_mii_10base_t1_t(unsigned long *adv)
 528 {
 529         u32 result = 0;
 530
 531         if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, adv))
 532                 result |= MDIO_AN_10BT1_AN_CTRL_ADV_EEE_T1L;
 533
 534         return result;
 535 }
 536
 537 /**
 538  * mii_c73_mod_linkmode - convert a Clause 73 advertisement to linkmodes
 539  * @adv: linkmode advertisement setting
 540  * @lpa: array of three u16s containing the advertisement
 541  *
 542  * Convert an IEEE 802.3 Clause 73 advertisement to ethtool link modes.
 543  */
 544 static inline void mii_c73_mod_linkmode(unsigned long *adv, u16 *lpa)
 545 {
 546         linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
 547                          adv, lpa[0] & MDIO_AN_C73_0_PAUSE);
 548         linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
 549                          adv, lpa[0] & MDIO_AN_C73_0_ASM_DIR);
 550         linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
 551                          adv, lpa[1] & MDIO_AN_C73_1_1000BASE_KX);
 552         linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
 553                          adv, lpa[1] & MDIO_AN_C73_1_10GBASE_KX4);
 554         linkmode_mod_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
 555                          adv, lpa[1] & MDIO_AN_C73_1_40GBASE_KR4);
 556         linkmode_mod_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
 557                          adv, lpa[1] & MDIO_AN_C73_1_40GBASE_CR4);
 558         /* 100GBASE_CR10 and 100GBASE_KP4 not implemented */
 559         linkmode_mod_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
 560                          adv, lpa[1] & MDIO_AN_C73_1_100GBASE_KR4);
 561         linkmode_mod_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
 562                          adv, lpa[1] & MDIO_AN_C73_1_100GBASE_CR4);
 563         /* 25GBASE_R_S not implemented */
 564         /* The 25GBASE_R bit can be used for 25Gbase KR or CR modes */
 565         linkmode_mod_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
 566                          adv, lpa[1] & MDIO_AN_C73_1_25GBASE_R);
 567         linkmode_mod_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT,
 568                          adv, lpa[1] & MDIO_AN_C73_1_25GBASE_R);
 569         linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
 570                          adv, lpa[1] & MDIO_AN_C73_1_10GBASE_KR);
 571         linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
 572                          adv, lpa[2] & MDIO_AN_C73_2_2500BASE_KX);
 573         /* 5GBASE_KR not implemented */
 574 }
 575
 576 int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
 577 int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
 578 int __mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
 579                      u16 set);
 580 int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 581                              u16 mask, u16 set);
 582
 583 int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
 584 int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum);
 585 int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
 586 int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);
 587 int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
 588                    u16 set);
 589 int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 590                            u16 mask, u16 set);
 591 int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
 592 int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
 593 int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,
 594                              u32 regnum);
 595 int __mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
 596                         u16 val);
 597 int mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
 598                       u16 val);
 599 int mdiobus_c45_write_nested(struct mii_bus *bus, int addr,  int devad,
 600                              u32 regnum, u16 val);
 601 int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,
 602                        u16 mask, u16 set);
 603
 604 int mdiobus_c45_modify_changed(struct mii_bus *bus, int addr, int devad,
 605                                u32 regnum, u16 mask, u16 set);
 606
 607 static inline int __mdiodev_read(struct mdio_device *mdiodev, u32 regnum)
 608 {
 609         return __mdiobus_read(mdiodev->bus, mdiodev->addr, regnum);
 610 }
 611
 612 static inline int __mdiodev_write(struct mdio_device *mdiodev, u32 regnum,
 613                                   u16 val)
 614 {
 615         return __mdiobus_write(mdiodev->bus, mdiodev->addr, regnum, val);
 616 }
 617
 618 static inline int __mdiodev_modify(struct mdio_device *mdiodev, u32 regnum,
 619                                    u16 mask, u16 set)
 620 {
 621         return __mdiobus_modify(mdiodev->bus, mdiodev->addr, regnum, mask, set);
 622 }
 623
 624 static inline int __mdiodev_modify_changed(struct mdio_device *mdiodev,
 625                                            u32 regnum, u16 mask, u16 set)
 626 {
 627         return __mdiobus_modify_changed(mdiodev->bus, mdiodev->addr, regnum,
 628                                         mask, set);
 629 }
 630
 631 static inline int mdiodev_read(struct mdio_device *mdiodev, u32 regnum)
 632 {
 633         return mdiobus_read(mdiodev->bus, mdiodev->addr, regnum);
 634 }
 635
 636 static inline int mdiodev_write(struct mdio_device *mdiodev, u32 regnum,
 637                                 u16 val)
 638 {
 639         return mdiobus_write(mdiodev->bus, mdiodev->addr, regnum, val);
 640 }
 641
 642 static inline int mdiodev_modify(struct mdio_device *mdiodev, u32 regnum,
 643                                  u16 mask, u16 set)
 644 {
 645         return mdiobus_modify(mdiodev->bus, mdiodev->addr, regnum, mask, set);
 646 }
 647
 648 static inline int mdiodev_modify_changed(struct mdio_device *mdiodev,
 649                                          u32 regnum, u16 mask, u16 set)
 650 {
 651         return mdiobus_modify_changed(mdiodev->bus, mdiodev->addr, regnum,
 652                                       mask, set);
 653 }
 654
 655 static inline int mdiodev_c45_modify(struct mdio_device *mdiodev, int devad,
 656                                      u32 regnum, u16 mask, u16 set)
 657 {
 658         return mdiobus_c45_modify(mdiodev->bus, mdiodev->addr, devad, regnum,
 659                                   mask, set);
 660 }
 661
 662 static inline int mdiodev_c45_modify_changed(struct mdio_device *mdiodev,
 663                                              int devad, u32 regnum, u16 mask,
 664                                              u16 set)
 665 {
 666         return mdiobus_c45_modify_changed(mdiodev->bus, mdiodev->addr, devad,
 667                                           regnum, mask, set);
 668 }
 669
 670 static inline int mdiodev_c45_read(struct mdio_device *mdiodev, int devad,
 671                                    u16 regnum)
 672 {
 673         return mdiobus_c45_read(mdiodev->bus, mdiodev->addr, devad, regnum);
 674 }
 675
 676 static inline int mdiodev_c45_write(struct mdio_device *mdiodev, u32 devad,
 677                                     u16 regnum, u16 val)
 678 {
 679         return mdiobus_c45_write(mdiodev->bus, mdiodev->addr, devad, regnum,
 680                                  val);
 681 }
 682
 683 int mdiobus_register_device(struct mdio_device *mdiodev);
 684 int mdiobus_unregister_device(struct mdio_device *mdiodev);
 685 bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
 686 struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr);
 687
 688 /**
 689  * mdio_module_driver() - Helper macro for registering mdio drivers
 690  * @_mdio_driver: driver to register
 691  *
 692  * Helper macro for MDIO drivers which do not do anything special in module
 693  * init/exit. Each module may only use this macro once, and calling it
 694  * replaces module_init() and module_exit().
 695  */
 696 #define mdio_module_driver(_mdio_driver)                                \
 697 static int __init mdio_module_init(void)                                \
 698 {                                                                       \
 699         return mdio_driver_register(&_mdio_driver);                     \
 700 }                                                                       \
 701 module_init(mdio_module_init);                                          \
 702 static void __exit mdio_module_exit(void)                               \
 703 {                                                                       \
 704         mdio_driver_unregister(&_mdio_driver);                          \
 705 }                                                                       \
 706 module_exit(mdio_module_exit)
 707
 708 #endif /* __LINUX_MDIO_H__ */