include/linux/mii.h

   1 /*
   2  * linux/mii.h: definitions for MII-compatible transceivers
   3  * Originally drivers/net/sunhme.h.
   4  *
   5  * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
   6  */
   7
   8 #ifndef __LINUX_MII_H__
   9 #define __LINUX_MII_H__
  10
  11 #include <linux/types.h>
  12 #include <linux/if.h>
  13
  14 /* Generic MII registers. */
  15
  16 #define MII_BMCR            0x00        /* Basic mode control register */
  17 #define MII_BMSR            0x01        /* Basic mode status register  */
  18 #define MII_PHYSID1         0x02        /* PHYS ID 1                   */
  19 #define MII_PHYSID2         0x03        /* PHYS ID 2                   */
  20 #define MII_ADVERTISE       0x04        /* Advertisement control reg   */
  21 #define MII_LPA             0x05        /* Link partner ability reg    */
  22 #define MII_EXPANSION       0x06        /* Expansion register          */
  23 #define MII_DCOUNTER        0x12        /* Disconnect counter          */
  24 #define MII_FCSCOUNTER      0x13        /* False carrier counter       */
  25 #define MII_NWAYTEST        0x14        /* N-way auto-neg test reg     */
  26 #define MII_RERRCOUNTER     0x15        /* Receive error counter       */
  27 #define MII_SREVISION       0x16        /* Silicon revision            */
  28 #define MII_RESV1           0x17        /* Reserved...                 */
  29 #define MII_LBRERROR        0x18        /* Lpback, rx, bypass error    */
  30 #define MII_PHYADDR         0x19        /* PHY address                 */
  31 #define MII_RESV2           0x1a        /* Reserved...                 */
  32 #define MII_TPISTATUS       0x1b        /* TPI status for 10mbps       */
  33 #define MII_NCONFIG         0x1c        /* Network interface config    */
  34
  35 /* Basic mode control register. */
  36 #define BMCR_RESV               0x003f  /* Unused...                   */
  37 #define BMCR_SPEED1000          0x0040  /* MSB of Speed (1000)         */
  38 #define BMCR_CTST               0x0080  /* Collision test              */
  39 #define BMCR_FULLDPLX           0x0100  /* Full duplex                 */
  40 #define BMCR_ANRESTART          0x0200  /* Auto negotiation restart    */
  41 #define BMCR_ISOLATE            0x0400  /* Disconnect DP83840 from MII */
  42 #define BMCR_PDOWN              0x0800  /* Powerdown the DP83840       */
  43 #define BMCR_ANENABLE           0x1000  /* Enable auto negotiation     */
  44 #define BMCR_SPEED100           0x2000  /* Select 100Mbps              */
  45 #define BMCR_LOOPBACK           0x4000  /* TXD loopback bits           */
  46 #define BMCR_RESET              0x8000  /* Reset the DP83840           */
  47
  48 /* Basic mode status register. */
  49 #define BMSR_ERCAP              0x0001  /* Ext-reg capability          */
  50 #define BMSR_JCD                0x0002  /* Jabber detected             */
  51 #define BMSR_LSTATUS            0x0004  /* Link status                 */
  52 #define BMSR_ANEGCAPABLE        0x0008  /* Able to do auto-negotiation */
  53 #define BMSR_RFAULT             0x0010  /* Remote fault detected       */
  54 #define BMSR_ANEGCOMPLETE       0x0020  /* Auto-negotiation complete   */
  55 #define BMSR_RESV               0x07c0  /* Unused...                   */
  56 #define BMSR_10HALF             0x0800  /* Can do 10mbps, half-duplex  */
  57 #define BMSR_10FULL             0x1000  /* Can do 10mbps, full-duplex  */
  58 #define BMSR_100HALF            0x2000  /* Can do 100mbps, half-duplex */
  59 #define BMSR_100FULL            0x4000  /* Can do 100mbps, full-duplex */
  60 #define BMSR_100BASE4           0x8000  /* Can do 100mbps, 4k packets  */
  61
  62 /* Advertisement control register. */
  63 #define ADVERTISE_SLCT          0x001f  /* Selector bits               */
  64 #define ADVERTISE_CSMA          0x0001  /* Only selector supported     */
  65 #define ADVERTISE_10HALF        0x0020  /* Try for 10mbps half-duplex  */
  66 #define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
  67 #define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
  68 #define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
  69 #define ADVERTISE_100BASE4      0x0200  /* Try for 100mbps 4k packets  */
  70 #define ADVERTISE_RESV          0x1c00  /* Unused...                   */
  71 #define ADVERTISE_RFAULT        0x2000  /* Say we can detect faults    */
  72 #define ADVERTISE_LPACK         0x4000  /* Ack link partners response  */
  73 #define ADVERTISE_NPAGE         0x8000  /* Next page bit               */
  74
  75 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
  76                         ADVERTISE_CSMA)
  77 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
  78                        ADVERTISE_100HALF | ADVERTISE_100FULL)
  79
  80 /* Link partner ability register. */
  81 #define LPA_SLCT                0x001f  /* Same as advertise selector  */
  82 #define LPA_10HALF              0x0020  /* Can do 10mbps half-duplex   */
  83 #define LPA_10FULL              0x0040  /* Can do 10mbps full-duplex   */
  84 #define LPA_100HALF             0x0080  /* Can do 100mbps half-duplex  */
  85 #define LPA_100FULL             0x0100  /* Can do 100mbps full-duplex  */
  86 #define LPA_100BASE4            0x0200  /* Can do 100mbps 4k packets   */
  87 #define LPA_RESV                0x1c00  /* Unused...                   */
  88 #define LPA_RFAULT              0x2000  /* Link partner faulted        */
  89 #define LPA_LPACK               0x4000  /* Link partner acked us       */
  90 #define LPA_NPAGE               0x8000  /* Next page bit               */
  91
  92 #define LPA_DUPLEX              (LPA_10FULL | LPA_100FULL)
  93 #define LPA_100                 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
  94
  95 /* Expansion register for auto-negotiation. */
  96 #define EXPANSION_NWAY          0x0001  /* Can do N-way auto-nego      */
  97 #define EXPANSION_LCWP          0x0002  /* Got new RX page code word   */
  98 #define EXPANSION_ENABLENPAGE   0x0004  /* This enables npage words    */
  99 #define EXPANSION_NPCAPABLE     0x0008  /* Link partner supports npage */
 100 #define EXPANSION_MFAULTS       0x0010  /* Multiple faults detected    */
 101 #define EXPANSION_RESV          0xffe0  /* Unused...                   */
 102
 103 /* N-way test register. */
 104 #define NWAYTEST_RESV1          0x00ff  /* Unused...                   */
 105 #define NWAYTEST_LOOPBACK       0x0100  /* Enable loopback for N-way   */
 106 #define NWAYTEST_RESV2          0xfe00  /* Unused...                   */
 107
 108
 109 struct mii_if_info {
 110         int phy_id;
 111         int advertising;
 112         int phy_id_mask;
 113         int reg_num_mask;
 114
 115         unsigned int full_duplex : 1;   /* is full duplex? */
 116         unsigned int force_media : 1;   /* is autoneg. disabled? */
 117
 118         struct net_device *dev;
 119         int (*mdio_read) (struct net_device *dev, int phy_id, int location);
 120         void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
 121 };
 122
 123 struct ethtool_cmd;
 124 struct mii_ioctl_data;
 125
 126 extern int mii_link_ok (struct mii_if_info *mii);
 127 extern int mii_nway_restart (struct mii_if_info *mii);
 128 extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 129 extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 130 extern void mii_check_link (struct mii_if_info *mii);
 131 extern unsigned int mii_check_media (struct mii_if_info *mii,
 132                                      unsigned int ok_to_print,
 133                                      unsigned int init_media);
 134 extern int generic_mii_ioctl(struct mii_if_info *mii_if,
 135                              struct mii_ioctl_data *mii_data, int cmd,
 136                              unsigned int *duplex_changed);
 137
 138
 139
 140 /* This structure is used in all SIOCxMIIxxx ioctl calls */
 141 struct mii_ioctl_data {
 142         u16             phy_id;
 143         u16             reg_num;
 144         u16             val_in;
 145         u16             val_out;
 146 };
 147
 148
 149 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
 150 {
 151         return (struct mii_ioctl_data *) &rq->ifr_ifru;
 152 }
 153
 154
 155 /**
 156  * mii_nway_result
 157  * @negotiated: value of MII ANAR and'd with ANLPAR
 158  *
 159  * Given a set of MII abilities, check each bit and returns the
 160  * currently supported media, in the priority order defined by
 161  * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
 162  * value of LPA solely, as described above.
 163  *
 164  * The one exception to IEEE 802.3u is that 100baseT4 is placed
 165  * between 100T-full and 100T-half.  If your phy does not support
 166  * 100T4 this is fine.  If your phy places 100T4 elsewhere in the
 167  * priority order, you will need to roll your own function.
 168  */
 169 static inline unsigned int mii_nway_result (unsigned int negotiated)
 170 {
 171         unsigned int ret;
 172
 173         if (negotiated & LPA_100FULL)
 174                 ret = LPA_100FULL;
 175         else if (negotiated & LPA_100BASE4)
 176                 ret = LPA_100BASE4;
 177         else if (negotiated & LPA_100HALF)
 178                 ret = LPA_100HALF;
 179         else if (negotiated & LPA_10FULL)
 180                 ret = LPA_10FULL;
 181         else
 182                 ret = LPA_10HALF;
 183
 184         return ret;
 185 }
 186
 187 /**
 188  * mii_duplex
 189  * @duplex_lock: Non-zero if duplex is locked at full
 190  * @negotiated: value of MII ANAR and'd with ANLPAR
 191  *
 192  * A small helper function for a common case.  Returns one
 193  * if the media is operating or locked at full duplex, and
 194  * returns zero otherwise.
 195  */
 196 static inline unsigned int mii_duplex (unsigned int duplex_lock,
 197                                        unsigned int negotiated)
 198 {
 199         if (duplex_lock)
 200                 return 1;
 201         if (mii_nway_result(negotiated) & LPA_DUPLEX)
 202                 return 1;
 203         return 0;
 204 }
 205
 206
 207 #endif /* __LINUX_MII_H__ */