include/linux/mdio.h

   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
  15 static 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
  20 static inline __u16 mdio_phy_id_prtad(int phy_id)
  21 {
  22         return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
  23 }
  24
  25 static 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  */
  44 struct 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
  62 struct ethtool_cmd;
  63 struct ethtool_pauseparam;
  64 extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
  65 extern int mdio_set_flag(const struct mdio_if_info *mdio,
  66                          int prtad, int devad, u16 addr, int mask,
  67                          bool sense);
  68 extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
  69 extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
  70 extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
  71                                       struct ethtool_cmd *ecmd,
  72                                       u32 npage_adv, u32 npage_lpa);
  73
  74 /**
  75  * mdio45_ethtool_gset - get settings for ETHTOOL_GSET
  76  * @mdio: MDIO interface
  77  * @ecmd: Ethtool request structure
  78  *
  79  * Since the CSRs for auto-negotiation using next pages are not fully
  80  * standardised, this function does not attempt to decode them.  Use
  81  * mdio45_ethtool_gset_npage() to specify advertisement bits from next
  82  * pages.
  83  */
  84 static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
  85                                        struct ethtool_cmd *ecmd)
  86 {
  87         mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
  88 }
  89
  90 extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
  91                           struct mii_ioctl_data *mii_data, int cmd);
  92
  93 /**
  94  * mmd_eee_cap_to_ethtool_sup_t
  95  * @eee_cap: value of the MMD EEE Capability register
  96  *
  97  * A small helper function that translates MMD EEE Capability (3.20) bits
  98  * to ethtool supported settings.
  99  */
 100 static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
 101 {
 102         u32 supported = 0;
 103
 104         if (eee_cap & MDIO_EEE_100TX)
 105                 supported |= SUPPORTED_100baseT_Full;
 106         if (eee_cap & MDIO_EEE_1000T)
 107                 supported |= SUPPORTED_1000baseT_Full;
 108         if (eee_cap & MDIO_EEE_10GT)
 109                 supported |= SUPPORTED_10000baseT_Full;
 110         if (eee_cap & MDIO_EEE_1000KX)
 111                 supported |= SUPPORTED_1000baseKX_Full;
 112         if (eee_cap & MDIO_EEE_10GKX4)
 113                 supported |= SUPPORTED_10000baseKX4_Full;
 114         if (eee_cap & MDIO_EEE_10GKR)
 115                 supported |= SUPPORTED_10000baseKR_Full;
 116
 117         return supported;
 118 }
 119
 120 /**
 121  * mmd_eee_adv_to_ethtool_adv_t
 122  * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
 123  *
 124  * A small helper function that translates the MMD EEE Advertisment (7.60)
 125  * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
 126  * settings.
 127  */
 128 static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
 129 {
 130         u32 adv = 0;
 131
 132         if (eee_adv & MDIO_EEE_100TX)
 133                 adv |= ADVERTISED_100baseT_Full;
 134         if (eee_adv & MDIO_EEE_1000T)
 135                 adv |= ADVERTISED_1000baseT_Full;
 136         if (eee_adv & MDIO_EEE_10GT)
 137                 adv |= ADVERTISED_10000baseT_Full;
 138         if (eee_adv & MDIO_EEE_1000KX)
 139                 adv |= ADVERTISED_1000baseKX_Full;
 140         if (eee_adv & MDIO_EEE_10GKX4)
 141                 adv |= ADVERTISED_10000baseKX4_Full;
 142         if (eee_adv & MDIO_EEE_10GKR)
 143                 adv |= ADVERTISED_10000baseKR_Full;
 144
 145         return adv;
 146 }
 147
 148 /**
 149  * ethtool_adv_to_mmd_eee_adv_t
 150  * @adv: the ethtool advertisement settings
 151  *
 152  * A small helper function that translates ethtool advertisement settings
 153  * to EEE advertisements for the MMD EEE Advertisement (7.60) and
 154  * MMD EEE Link Partner Ability (7.61) registers.
 155  */
 156 static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
 157 {
 158         u16 reg = 0;
 159
 160         if (adv & ADVERTISED_100baseT_Full)
 161                 reg |= MDIO_EEE_100TX;
 162         if (adv & ADVERTISED_1000baseT_Full)
 163                 reg |= MDIO_EEE_1000T;
 164         if (adv & ADVERTISED_10000baseT_Full)
 165                 reg |= MDIO_EEE_10GT;
 166         if (adv & ADVERTISED_1000baseKX_Full)
 167                 reg |= MDIO_EEE_1000KX;
 168         if (adv & ADVERTISED_10000baseKX4_Full)
 169                 reg |= MDIO_EEE_10GKX4;
 170         if (adv & ADVERTISED_10000baseKR_Full)
 171                 reg |= MDIO_EEE_10GKR;
 172
 173         return reg;
 174 }
 175
 176 #endif /* __LINUX_MDIO_H__ */