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 /* Generic MII registers. */
  12
  13 #define MII_BMCR            0x00        /* Basic mode control register */
  14 #define MII_BMSR            0x01        /* Basic mode status register  */
  15 #define MII_PHYSID1         0x02        /* PHYS ID 1                   */
  16 #define MII_PHYSID2         0x03        /* PHYS ID 2                   */
  17 #define MII_ADVERTISE       0x04        /* Advertisement control reg   */
  18 #define MII_LPA             0x05        /* Link partner ability reg    */
  19 #define MII_EXPANSION       0x06        /* Expansion register          */
  20 #define MII_DCOUNTER        0x12        /* Disconnect counter          */
  21 #define MII_FCSCOUNTER      0x13        /* False carrier counter       */
  22 #define MII_NWAYTEST        0x14        /* N-way auto-neg test reg     */
  23 #define MII_RERRCOUNTER     0x15        /* Receive error counter       */
  24 #define MII_SREVISION       0x16        /* Silicon revision            */
  25 #define MII_RESV1           0x17        /* Reserved...                 */
  26 #define MII_LBRERROR        0x18        /* Lpback, rx, bypass error    */
  27 #define MII_PHYADDR         0x19        /* PHY address                 */
  28 #define MII_RESV2           0x1a        /* Reserved...                 */
  29 #define MII_TPISTATUS       0x1b        /* TPI status for 10mbps       */
  30 #define MII_NCONFIG         0x1c        /* Network interface config    */
  31
  32 /* Basic mode control register. */
  33 #define BMCR_RESV               0x003f  /* Unused...                   */
  34 #define BMCR_SPEED1000          0x0040  /* MSB of Speed (1000)         */
  35 #define BMCR_CTST               0x0080  /* Collision test              */
  36 #define BMCR_FULLDPLX           0x0100  /* Full duplex                 */
  37 #define BMCR_ANRESTART          0x0200  /* Auto negotiation restart    */
  38 #define BMCR_ISOLATE            0x0400  /* Disconnect DP83840 from MII */
  39 #define BMCR_PDOWN              0x0800  /* Powerdown the DP83840       */
  40 #define BMCR_ANENABLE           0x1000  /* Enable auto negotiation     */
  41 #define BMCR_SPEED100           0x2000  /* Select 100Mbps              */
  42 #define BMCR_LOOPBACK           0x4000  /* TXD loopback bits           */
  43 #define BMCR_RESET              0x8000  /* Reset the DP83840           */
  44
  45 /* Basic mode status register. */
  46 #define BMSR_ERCAP              0x0001  /* Ext-reg capability          */
  47 #define BMSR_JCD                0x0002  /* Jabber detected             */
  48 #define BMSR_LSTATUS            0x0004  /* Link status                 */
  49 #define BMSR_ANEGCAPABLE        0x0008  /* Able to do auto-negotiation */
  50 #define BMSR_RFAULT             0x0010  /* Remote fault detected       */
  51 #define BMSR_ANEGCOMPLETE       0x0020  /* Auto-negotiation complete   */
  52 #define BMSR_RESV               0x07c0  /* Unused...                   */
  53 #define BMSR_10HALF             0x0800  /* Can do 10mbps, half-duplex  */
  54 #define BMSR_10FULL             0x1000  /* Can do 10mbps, full-duplex  */
  55 #define BMSR_100HALF            0x2000  /* Can do 100mbps, half-duplex */
  56 #define BMSR_100FULL            0x4000  /* Can do 100mbps, full-duplex */
  57 #define BMSR_100BASE4           0x8000  /* Can do 100mbps, 4k packets  */
  58
  59 /* Advertisement control register. */
  60 #define ADVERTISE_SLCT          0x001f  /* Selector bits               */
  61 #define ADVERTISE_CSMA          0x0001  /* Only selector supported     */
  62 #define ADVERTISE_10HALF        0x0020  /* Try for 10mbps half-duplex  */
  63 #define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
  64 #define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
  65 #define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
  66 #define ADVERTISE_100BASE4      0x0200  /* Try for 100mbps 4k packets  */
  67 #define ADVERTISE_RESV          0x1c00  /* Unused...                   */
  68 #define ADVERTISE_RFAULT        0x2000  /* Say we can detect faults    */
  69 #define ADVERTISE_LPACK         0x4000  /* Ack link partners response  */
  70 #define ADVERTISE_NPAGE         0x8000  /* Next page bit               */
  71
  72 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
  73                         ADVERTISE_CSMA)
  74 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
  75                        ADVERTISE_100HALF | ADVERTISE_100FULL)
  76
  77 /* Link partner ability register. */
  78 #define LPA_SLCT                0x001f  /* Same as advertise selector  */
  79 #define LPA_10HALF              0x0020  /* Can do 10mbps half-duplex   */
  80 #define LPA_10FULL              0x0040  /* Can do 10mbps full-duplex   */
  81 #define LPA_100HALF             0x0080  /* Can do 100mbps half-duplex  */
  82 #define LPA_100FULL             0x0100  /* Can do 100mbps full-duplex  */
  83 #define LPA_100BASE4            0x0200  /* Can do 100mbps 4k packets   */
  84 #define LPA_RESV                0x1c00  /* Unused...                   */
  85 #define LPA_RFAULT              0x2000  /* Link partner faulted        */
  86 #define LPA_LPACK               0x4000  /* Link partner acked us       */
  87 #define LPA_NPAGE               0x8000  /* Next page bit               */
  88
  89 #define LPA_DUPLEX              (LPA_10FULL | LPA_100FULL)
  90 #define LPA_100                 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
  91
  92 /* Expansion register for auto-negotiation. */
  93 #define EXPANSION_NWAY          0x0001  /* Can do N-way auto-nego      */
  94 #define EXPANSION_LCWP          0x0002  /* Got new RX page code word   */
  95 #define EXPANSION_ENABLENPAGE   0x0004  /* This enables npage words    */
  96 #define EXPANSION_NPCAPABLE     0x0008  /* Link partner supports npage */
  97 #define EXPANSION_MFAULTS       0x0010  /* Multiple faults detected    */
  98 #define EXPANSION_RESV          0xffe0  /* Unused...                   */
  99
 100 /* N-way test register. */
 101 #define NWAYTEST_RESV1          0x00ff  /* Unused...                   */
 102 #define NWAYTEST_LOOPBACK       0x0100  /* Enable loopback for N-way   */
 103 #define NWAYTEST_RESV2          0xfe00  /* Unused...                   */
 104
 105
 106 /**
 107  * mii_nway_result
 108  * @negotiated: value of MII ANAR and'd with ANLPAR
 109  *
 110  * Given a set of MII abilities, check each bit and returns the
 111  * currently supported media, in the priority order defined by
 112  * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
 113  * value of LPA solely, as described above.
 114  *
 115  * The one exception to IEEE 802.3u is that 100baseT4 is placed
 116  * between 100T-full and 100T-half.  If your phy does not support
 117  * 100T4 this is fine.  If your phy places 100T4 elsewhere in the
 118  * priority order, you will need to roll your own function.
 119  */
 120 static inline unsigned int mii_nway_result (unsigned int negotiated)
 121 {
 122         unsigned int ret;
 123
 124         if (negotiated & LPA_100FULL)
 125                 ret = LPA_100FULL;
 126         else if (negotiated & LPA_100BASE4)
 127                 ret = LPA_100BASE4;
 128         else if (negotiated & LPA_100HALF)
 129                 ret = LPA_100HALF;
 130         else if (negotiated & LPA_10FULL)
 131                 ret = LPA_10FULL;
 132         else
 133                 ret = LPA_10HALF;
 134
 135         return ret;
 136 }
 137
 138 /**
 139  * mii_duplex
 140  * @duplex_lock: Non-zero if duplex is locked at full
 141  * @negotiated: value of MII ANAR and'd with ANLPAR
 142  *
 143  * A small helper function for a common case.  Returns one
 144  * if the media is operating or locked at full duplex, and
 145  * returns zero otherwise.
 146  */
 147 static inline unsigned int mii_duplex (unsigned int duplex_lock,
 148                                        unsigned int negotiated)
 149 {
 150         if (duplex_lock)
 151                 return 1;
 152         if (mii_nway_result(negotiated) & LPA_DUPLEX)
 153                 return 1;
 154         return 0;
 155 }
 156
 157
 158 #endif /* __LINUX_MII_H__ */