linux/include/linux/mdio.h
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   1/*
   2 * linux/mdio.h: definitions for MDIO (clause 45) transceivers
   3 * Copyright 2006-2009 Solarflare Communications Inc.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License version 2 as published
   7 * by the Free Software Foundation, incorporated herein by reference.
   8 */
   9#ifndef __LINUX_MDIO_H__
  10#define __LINUX_MDIO_H__
  11
  12#include <uapi/linux/mdio.h>
  13
  14
  15static inline bool mdio_phy_id_is_c45(int phy_id)
  16{
  17        return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
  18}
  19
  20static inline __u16 mdio_phy_id_prtad(int phy_id)
  21{
  22        return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
  23}
  24
  25static inline __u16 mdio_phy_id_devad(int phy_id)
  26{
  27        return phy_id & MDIO_PHY_ID_DEVAD;
  28}
  29
  30/**
  31 * struct mdio_if_info - Ethernet controller MDIO interface
  32 * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
  33 * @mmds: Mask of MMDs expected to be present in the PHY.  This must be
  34 *      non-zero unless @prtad = %MDIO_PRTAD_NONE.
  35 * @mode_support: MDIO modes supported.  If %MDIO_SUPPORTS_C22 is set then
  36 *      MII register access will be passed through with @devad =
  37 *      %MDIO_DEVAD_NONE.  If %MDIO_EMULATE_C22 is set then access to
  38 *      commonly used clause 22 registers will be translated into
  39 *      clause 45 registers.
  40 * @dev: Net device structure
  41 * @mdio_read: Register read function; returns value or negative error code
  42 * @mdio_write: Register write function; returns 0 or negative error code
  43 */
  44struct mdio_if_info {
  45        int prtad;
  46        u32 mmds;
  47        unsigned mode_support;
  48
  49        struct net_device *dev;
  50        int (*mdio_read)(struct net_device *dev, int prtad, int devad,
  51                         u16 addr);
  52        int (*mdio_write)(struct net_device *dev, int prtad, int devad,
  53                          u16 addr, u16 val);
  54};
  55
  56#define MDIO_PRTAD_NONE                 (-1)
  57#define MDIO_DEVAD_NONE                 (-1)
  58#define MDIO_SUPPORTS_C22               1
  59#define MDIO_SUPPORTS_C45               2
  60#define MDIO_EMULATE_C22                4
  61
  62struct ethtool_cmd;
  63struct ethtool_pauseparam;
  64extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
  65extern int mdio_set_flag(const struct mdio_if_info *mdio,
  66                         int prtad, int devad, u16 addr, int mask,
  67                         bool sense);
  68extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
  69extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
  70extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
  71                                      struct ethtool_cmd *ecmd,
  72                                      u32 npage_adv, u32 npage_lpa);
  73extern void
  74mdio45_ethtool_spauseparam_an(const struct mdio_if_info *mdio,
  75                              const struct ethtool_pauseparam *ecmd);
  76
  77/**
  78 * mdio45_ethtool_gset - get settings for ETHTOOL_GSET
  79 * @mdio: MDIO interface
  80 * @ecmd: Ethtool request structure
  81 *
  82 * Since the CSRs for auto-negotiation using next pages are not fully
  83 * standardised, this function does not attempt to decode them.  Use
  84 * mdio45_ethtool_gset_npage() to specify advertisement bits from next
  85 * pages.
  86 */
  87static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
  88                                       struct ethtool_cmd *ecmd)
  89{
  90        mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
  91}
  92
  93extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
  94                          struct mii_ioctl_data *mii_data, int cmd);
  95
  96/**
  97 * mmd_eee_cap_to_ethtool_sup_t
  98 * @eee_cap: value of the MMD EEE Capability register
  99 *
 100 * A small helper function that translates MMD EEE Capability (3.20) bits
 101 * to ethtool supported settings.
 102 */
 103static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
 104{
 105        u32 supported = 0;
 106
 107        if (eee_cap & MDIO_EEE_100TX)
 108                supported |= SUPPORTED_100baseT_Full;
 109        if (eee_cap & MDIO_EEE_1000T)
 110                supported |= SUPPORTED_1000baseT_Full;
 111        if (eee_cap & MDIO_EEE_10GT)
 112                supported |= SUPPORTED_10000baseT_Full;
 113        if (eee_cap & MDIO_EEE_1000KX)
 114                supported |= SUPPORTED_1000baseKX_Full;
 115        if (eee_cap & MDIO_EEE_10GKX4)
 116                supported |= SUPPORTED_10000baseKX4_Full;
 117        if (eee_cap & MDIO_EEE_10GKR)
 118                supported |= SUPPORTED_10000baseKR_Full;
 119
 120        return supported;
 121}
 122
 123/**
 124 * mmd_eee_adv_to_ethtool_adv_t
 125 * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
 126 *
 127 * A small helper function that translates the MMD EEE Advertisment (7.60)
 128 * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
 129 * settings.
 130 */
 131static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
 132{
 133        u32 adv = 0;
 134
 135        if (eee_adv & MDIO_EEE_100TX)
 136                adv |= ADVERTISED_100baseT_Full;
 137        if (eee_adv & MDIO_EEE_1000T)
 138                adv |= ADVERTISED_1000baseT_Full;
 139        if (eee_adv & MDIO_EEE_10GT)
 140                adv |= ADVERTISED_10000baseT_Full;
 141        if (eee_adv & MDIO_EEE_1000KX)
 142                adv |= ADVERTISED_1000baseKX_Full;
 143        if (eee_adv & MDIO_EEE_10GKX4)
 144                adv |= ADVERTISED_10000baseKX4_Full;
 145        if (eee_adv & MDIO_EEE_10GKR)
 146                adv |= ADVERTISED_10000baseKR_Full;
 147
 148        return adv;
 149}
 150
 151/**
 152 * ethtool_adv_to_mmd_eee_adv_t
 153 * @adv: the ethtool advertisement settings
 154 *
 155 * A small helper function that translates ethtool advertisement settings
 156 * to EEE advertisements for the MMD EEE Advertisement (7.60) and
 157 * MMD EEE Link Partner Ability (7.61) registers.
 158 */
 159static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
 160{
 161        u16 reg = 0;
 162
 163        if (adv & ADVERTISED_100baseT_Full)
 164                reg |= MDIO_EEE_100TX;
 165        if (adv & ADVERTISED_1000baseT_Full)
 166                reg |= MDIO_EEE_1000T;
 167        if (adv & ADVERTISED_10000baseT_Full)
 168                reg |= MDIO_EEE_10GT;
 169        if (adv & ADVERTISED_1000baseKX_Full)
 170                reg |= MDIO_EEE_1000KX;
 171        if (adv & ADVERTISED_10000baseKX4_Full)
 172                reg |= MDIO_EEE_10GKX4;
 173        if (adv & ADVERTISED_10000baseKR_Full)
 174                reg |= MDIO_EEE_10GKR;
 175
 176        return reg;
 177}
 178
 179#endif /* __LINUX_MDIO_H__ */
 180
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