linux/include/linux/mii.h
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   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/ethtool.h>
  13
  14/* Generic MII registers. */
  15#define MII_BMCR                0x00    /* Basic mode control register */
  16#define MII_BMSR                0x01    /* Basic mode status register  */
  17#define MII_PHYSID1             0x02    /* PHYS ID 1                   */
  18#define MII_PHYSID2             0x03    /* PHYS ID 2                   */
  19#define MII_ADVERTISE           0x04    /* Advertisement control reg   */
  20#define MII_LPA                 0x05    /* Link partner ability reg    */
  21#define MII_EXPANSION           0x06    /* Expansion register          */
  22#define MII_CTRL1000            0x09    /* 1000BASE-T control          */
  23#define MII_STAT1000            0x0a    /* 1000BASE-T status           */
  24#define MII_MMD_CTRL            0x0d    /* MMD Access Control Register */
  25#define MII_MMD_DATA            0x0e    /* MMD Access Data Register */
  26#define MII_ESTATUS             0x0f    /* Extended Status             */
  27#define MII_DCOUNTER            0x12    /* Disconnect counter          */
  28#define MII_FCSCOUNTER          0x13    /* False carrier counter       */
  29#define MII_NWAYTEST            0x14    /* N-way auto-neg test reg     */
  30#define MII_RERRCOUNTER         0x15    /* Receive error counter       */
  31#define MII_SREVISION           0x16    /* Silicon revision            */
  32#define MII_RESV1               0x17    /* Reserved...                 */
  33#define MII_LBRERROR            0x18    /* Lpback, rx, bypass error    */
  34#define MII_PHYADDR             0x19    /* PHY address                 */
  35#define MII_RESV2               0x1a    /* Reserved...                 */
  36#define MII_TPISTATUS           0x1b    /* TPI status for 10mbps       */
  37#define MII_NCONFIG             0x1c    /* Network interface config    */
  38
  39/* Basic mode control register. */
  40#define BMCR_RESV               0x003f  /* Unused...                   */
  41#define BMCR_SPEED1000          0x0040  /* MSB of Speed (1000)         */
  42#define BMCR_CTST               0x0080  /* Collision test              */
  43#define BMCR_FULLDPLX           0x0100  /* Full duplex                 */
  44#define BMCR_ANRESTART          0x0200  /* Auto negotiation restart    */
  45#define BMCR_ISOLATE            0x0400  /* Isolate data paths from MII */
  46#define BMCR_PDOWN              0x0800  /* Enable low power state      */
  47#define BMCR_ANENABLE           0x1000  /* Enable auto negotiation     */
  48#define BMCR_SPEED100           0x2000  /* Select 100Mbps              */
  49#define BMCR_LOOPBACK           0x4000  /* TXD loopback bits           */
  50#define BMCR_RESET              0x8000  /* Reset to default state      */
  51
  52/* Basic mode status register. */
  53#define BMSR_ERCAP              0x0001  /* Ext-reg capability          */
  54#define BMSR_JCD                0x0002  /* Jabber detected             */
  55#define BMSR_LSTATUS            0x0004  /* Link status                 */
  56#define BMSR_ANEGCAPABLE        0x0008  /* Able to do auto-negotiation */
  57#define BMSR_RFAULT             0x0010  /* Remote fault detected       */
  58#define BMSR_ANEGCOMPLETE       0x0020  /* Auto-negotiation complete   */
  59#define BMSR_RESV               0x00c0  /* Unused...                   */
  60#define BMSR_ESTATEN            0x0100  /* Extended Status in R15      */
  61#define BMSR_100HALF2           0x0200  /* Can do 100BASE-T2 HDX       */
  62#define BMSR_100FULL2           0x0400  /* Can do 100BASE-T2 FDX       */
  63#define BMSR_10HALF             0x0800  /* Can do 10mbps, half-duplex  */
  64#define BMSR_10FULL             0x1000  /* Can do 10mbps, full-duplex  */
  65#define BMSR_100HALF            0x2000  /* Can do 100mbps, half-duplex */
  66#define BMSR_100FULL            0x4000  /* Can do 100mbps, full-duplex */
  67#define BMSR_100BASE4           0x8000  /* Can do 100mbps, 4k packets  */
  68
  69/* Advertisement control register. */
  70#define ADVERTISE_SLCT          0x001f  /* Selector bits               */
  71#define ADVERTISE_CSMA          0x0001  /* Only selector supported     */
  72#define ADVERTISE_10HALF        0x0020  /* Try for 10mbps half-duplex  */
  73#define ADVERTISE_1000XFULL     0x0020  /* Try for 1000BASE-X full-duplex */
  74#define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
  75#define ADVERTISE_1000XHALF     0x0040  /* Try for 1000BASE-X half-duplex */
  76#define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
  77#define ADVERTISE_1000XPAUSE    0x0080  /* Try for 1000BASE-X pause    */
  78#define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
  79#define ADVERTISE_1000XPSE_ASYM 0x0100  /* Try for 1000BASE-X asym pause */
  80#define ADVERTISE_100BASE4      0x0200  /* Try for 100mbps 4k packets  */
  81#define ADVERTISE_PAUSE_CAP     0x0400  /* Try for pause               */
  82#define ADVERTISE_PAUSE_ASYM    0x0800  /* Try for asymetric pause     */
  83#define ADVERTISE_RESV          0x1000  /* Unused...                   */
  84#define ADVERTISE_RFAULT        0x2000  /* Say we can detect faults    */
  85#define ADVERTISE_LPACK         0x4000  /* Ack link partners response  */
  86#define ADVERTISE_NPAGE         0x8000  /* Next page bit               */
  87
  88#define ADVERTISE_FULL          (ADVERTISE_100FULL | ADVERTISE_10FULL | \
  89                                  ADVERTISE_CSMA)
  90#define ADVERTISE_ALL           (ADVERTISE_10HALF | ADVERTISE_10FULL | \
  91                                  ADVERTISE_100HALF | ADVERTISE_100FULL)
  92
  93/* Link partner ability register. */
  94#define LPA_SLCT                0x001f  /* Same as advertise selector  */
  95#define LPA_10HALF              0x0020  /* Can do 10mbps half-duplex   */
  96#define LPA_1000XFULL           0x0020  /* Can do 1000BASE-X full-duplex */
  97#define LPA_10FULL              0x0040  /* Can do 10mbps full-duplex   */
  98#define LPA_1000XHALF           0x0040  /* Can do 1000BASE-X half-duplex */
  99#define LPA_100HALF             0x0080  /* Can do 100mbps half-duplex  */
 100#define LPA_1000XPAUSE          0x0080  /* Can do 1000BASE-X pause     */
 101#define LPA_100FULL             0x0100  /* Can do 100mbps full-duplex  */
 102#define LPA_1000XPAUSE_ASYM     0x0100  /* Can do 1000BASE-X pause asym*/
 103#define LPA_100BASE4            0x0200  /* Can do 100mbps 4k packets   */
 104#define LPA_PAUSE_CAP           0x0400  /* Can pause                   */
 105#define LPA_PAUSE_ASYM          0x0800  /* Can pause asymetrically     */
 106#define LPA_RESV                0x1000  /* Unused...                   */
 107#define LPA_RFAULT              0x2000  /* Link partner faulted        */
 108#define LPA_LPACK               0x4000  /* Link partner acked us       */
 109#define LPA_NPAGE               0x8000  /* Next page bit               */
 110
 111#define LPA_DUPLEX              (LPA_10FULL | LPA_100FULL)
 112#define LPA_100                 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
 113
 114/* Expansion register for auto-negotiation. */
 115#define EXPANSION_NWAY          0x0001  /* Can do N-way auto-nego      */
 116#define EXPANSION_LCWP          0x0002  /* Got new RX page code word   */
 117#define EXPANSION_ENABLENPAGE   0x0004  /* This enables npage words    */
 118#define EXPANSION_NPCAPABLE     0x0008  /* Link partner supports npage */
 119#define EXPANSION_MFAULTS       0x0010  /* Multiple faults detected    */
 120#define EXPANSION_RESV          0xffe0  /* Unused...                   */
 121
 122#define ESTATUS_1000_TFULL      0x2000  /* Can do 1000BT Full          */
 123#define ESTATUS_1000_THALF      0x1000  /* Can do 1000BT Half          */
 124
 125/* N-way test register. */
 126#define NWAYTEST_RESV1          0x00ff  /* Unused...                   */
 127#define NWAYTEST_LOOPBACK       0x0100  /* Enable loopback for N-way   */
 128#define NWAYTEST_RESV2          0xfe00  /* Unused...                   */
 129
 130/* 1000BASE-T Control register */
 131#define ADVERTISE_1000FULL      0x0200  /* Advertise 1000BASE-T full duplex */
 132#define ADVERTISE_1000HALF      0x0100  /* Advertise 1000BASE-T half duplex */
 133#define CTL1000_AS_MASTER       0x0800
 134#define CTL1000_ENABLE_MASTER   0x1000
 135
 136/* 1000BASE-T Status register */
 137#define LPA_1000LOCALRXOK       0x2000  /* Link partner local receiver status */
 138#define LPA_1000REMRXOK         0x1000  /* Link partner remote receiver status */
 139#define LPA_1000FULL            0x0800  /* Link partner 1000BASE-T full duplex */
 140#define LPA_1000HALF            0x0400  /* Link partner 1000BASE-T half duplex */
 141
 142/* Flow control flags */
 143#define FLOW_CTRL_TX            0x01
 144#define FLOW_CTRL_RX            0x02
 145
 146/* MMD Access Control register fields */
 147#define MII_MMD_CTRL_DEVAD_MASK 0x1f    /* Mask MMD DEVAD*/
 148#define MII_MMD_CTRL_ADDR       0x0000  /* Address */
 149#define MII_MMD_CTRL_NOINCR     0x4000  /* no post increment */
 150#define MII_MMD_CTRL_INCR_RDWT  0x8000  /* post increment on reads & writes */
 151#define MII_MMD_CTRL_INCR_ON_WT 0xC000  /* post increment on writes only */
 152
 153/* This structure is used in all SIOCxMIIxxx ioctl calls */
 154struct mii_ioctl_data {
 155        __u16           phy_id;
 156        __u16           reg_num;
 157        __u16           val_in;
 158        __u16           val_out;
 159};
 160
 161#ifdef __KERNEL__
 162
 163#include <linux/if.h>
 164
 165struct ethtool_cmd;
 166
 167struct mii_if_info {
 168        int phy_id;
 169        int advertising;
 170        int phy_id_mask;
 171        int reg_num_mask;
 172
 173        unsigned int full_duplex : 1;   /* is full duplex? */
 174        unsigned int force_media : 1;   /* is autoneg. disabled? */
 175        unsigned int supports_gmii : 1; /* are GMII registers supported? */
 176
 177        struct net_device *dev;
 178        int (*mdio_read) (struct net_device *dev, int phy_id, int location);
 179        void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
 180};
 181
 182extern int mii_link_ok (struct mii_if_info *mii);
 183extern int mii_nway_restart (struct mii_if_info *mii);
 184extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 185extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 186extern int mii_check_gmii_support(struct mii_if_info *mii);
 187extern void mii_check_link (struct mii_if_info *mii);
 188extern unsigned int mii_check_media (struct mii_if_info *mii,
 189                                     unsigned int ok_to_print,
 190                                     unsigned int init_media);
 191extern int generic_mii_ioctl(struct mii_if_info *mii_if,
 192                             struct mii_ioctl_data *mii_data, int cmd,
 193                             unsigned int *duplex_changed);
 194
 195
 196static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
 197{
 198        return (struct mii_ioctl_data *) &rq->ifr_ifru;
 199}
 200
 201/**
 202 * mii_nway_result
 203 * @negotiated: value of MII ANAR and'd with ANLPAR
 204 *
 205 * Given a set of MII abilities, check each bit and returns the
 206 * currently supported media, in the priority order defined by
 207 * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
 208 * value of LPA solely, as described above.
 209 *
 210 * The one exception to IEEE 802.3u is that 100baseT4 is placed
 211 * between 100T-full and 100T-half.  If your phy does not support
 212 * 100T4 this is fine.  If your phy places 100T4 elsewhere in the
 213 * priority order, you will need to roll your own function.
 214 */
 215static inline unsigned int mii_nway_result (unsigned int negotiated)
 216{
 217        unsigned int ret;
 218
 219        if (negotiated & LPA_100FULL)
 220                ret = LPA_100FULL;
 221        else if (negotiated & LPA_100BASE4)
 222                ret = LPA_100BASE4;
 223        else if (negotiated & LPA_100HALF)
 224                ret = LPA_100HALF;
 225        else if (negotiated & LPA_10FULL)
 226                ret = LPA_10FULL;
 227        else
 228                ret = LPA_10HALF;
 229
 230        return ret;
 231}
 232
 233/**
 234 * mii_duplex
 235 * @duplex_lock: Non-zero if duplex is locked at full
 236 * @negotiated: value of MII ANAR and'd with ANLPAR
 237 *
 238 * A small helper function for a common case.  Returns one
 239 * if the media is operating or locked at full duplex, and
 240 * returns zero otherwise.
 241 */
 242static inline unsigned int mii_duplex (unsigned int duplex_lock,
 243                                       unsigned int negotiated)
 244{
 245        if (duplex_lock)
 246                return 1;
 247        if (mii_nway_result(negotiated) & LPA_DUPLEX)
 248                return 1;
 249        return 0;
 250}
 251
 252/**
 253 * ethtool_adv_to_mii_adv_t
 254 * @ethadv: the ethtool advertisement settings
 255 *
 256 * A small helper function that translates ethtool advertisement
 257 * settings to phy autonegotiation advertisements for the
 258 * MII_ADVERTISE register.
 259 */
 260static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
 261{
 262        u32 result = 0;
 263
 264        if (ethadv & ADVERTISED_10baseT_Half)
 265                result |= ADVERTISE_10HALF;
 266        if (ethadv & ADVERTISED_10baseT_Full)
 267                result |= ADVERTISE_10FULL;
 268        if (ethadv & ADVERTISED_100baseT_Half)
 269                result |= ADVERTISE_100HALF;
 270        if (ethadv & ADVERTISED_100baseT_Full)
 271                result |= ADVERTISE_100FULL;
 272        if (ethadv & ADVERTISED_Pause)
 273                result |= ADVERTISE_PAUSE_CAP;
 274        if (ethadv & ADVERTISED_Asym_Pause)
 275                result |= ADVERTISE_PAUSE_ASYM;
 276
 277        return result;
 278}
 279
 280/**
 281 * mii_adv_to_ethtool_adv_t
 282 * @adv: value of the MII_ADVERTISE register
 283 *
 284 * A small helper function that translates MII_ADVERTISE bits
 285 * to ethtool advertisement settings.
 286 */
 287static inline u32 mii_adv_to_ethtool_adv_t(u32 adv)
 288{
 289        u32 result = 0;
 290
 291        if (adv & ADVERTISE_10HALF)
 292                result |= ADVERTISED_10baseT_Half;
 293        if (adv & ADVERTISE_10FULL)
 294                result |= ADVERTISED_10baseT_Full;
 295        if (adv & ADVERTISE_100HALF)
 296                result |= ADVERTISED_100baseT_Half;
 297        if (adv & ADVERTISE_100FULL)
 298                result |= ADVERTISED_100baseT_Full;
 299        if (adv & ADVERTISE_PAUSE_CAP)
 300                result |= ADVERTISED_Pause;
 301        if (adv & ADVERTISE_PAUSE_ASYM)
 302                result |= ADVERTISED_Asym_Pause;
 303
 304        return result;
 305}
 306
 307/**
 308 * ethtool_adv_to_mii_ctrl1000_t
 309 * @ethadv: the ethtool advertisement settings
 310 *
 311 * A small helper function that translates ethtool advertisement
 312 * settings to phy autonegotiation advertisements for the
 313 * MII_CTRL1000 register when in 1000T mode.
 314 */
 315static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
 316{
 317        u32 result = 0;
 318
 319        if (ethadv & ADVERTISED_1000baseT_Half)
 320                result |= ADVERTISE_1000HALF;
 321        if (ethadv & ADVERTISED_1000baseT_Full)
 322                result |= ADVERTISE_1000FULL;
 323
 324        return result;
 325}
 326
 327/**
 328 * mii_ctrl1000_to_ethtool_adv_t
 329 * @adv: value of the MII_CTRL1000 register
 330 *
 331 * A small helper function that translates MII_CTRL1000
 332 * bits, when in 1000Base-T mode, to ethtool
 333 * advertisement settings.
 334 */
 335static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv)
 336{
 337        u32 result = 0;
 338
 339        if (adv & ADVERTISE_1000HALF)
 340                result |= ADVERTISED_1000baseT_Half;
 341        if (adv & ADVERTISE_1000FULL)
 342                result |= ADVERTISED_1000baseT_Full;
 343
 344        return result;
 345}
 346
 347/**
 348 * mii_lpa_to_ethtool_lpa_t
 349 * @adv: value of the MII_LPA register
 350 *
 351 * A small helper function that translates MII_LPA
 352 * bits, when in 1000Base-T mode, to ethtool
 353 * LP advertisement settings.
 354 */
 355static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa)
 356{
 357        u32 result = 0;
 358
 359        if (lpa & LPA_LPACK)
 360                result |= ADVERTISED_Autoneg;
 361
 362        return result | mii_adv_to_ethtool_adv_t(lpa);
 363}
 364
 365/**
 366 * mii_stat1000_to_ethtool_lpa_t
 367 * @adv: value of the MII_STAT1000 register
 368 *
 369 * A small helper function that translates MII_STAT1000
 370 * bits, when in 1000Base-T mode, to ethtool
 371 * advertisement settings.
 372 */
 373static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa)
 374{
 375        u32 result = 0;
 376
 377        if (lpa & LPA_1000HALF)
 378                result |= ADVERTISED_1000baseT_Half;
 379        if (lpa & LPA_1000FULL)
 380                result |= ADVERTISED_1000baseT_Full;
 381
 382        return result;
 383}
 384
 385/**
 386 * ethtool_adv_to_mii_adv_x
 387 * @ethadv: the ethtool advertisement settings
 388 *
 389 * A small helper function that translates ethtool advertisement
 390 * settings to phy autonegotiation advertisements for the
 391 * MII_CTRL1000 register when in 1000Base-X mode.
 392 */
 393static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv)
 394{
 395        u32 result = 0;
 396
 397        if (ethadv & ADVERTISED_1000baseT_Half)
 398                result |= ADVERTISE_1000XHALF;
 399        if (ethadv & ADVERTISED_1000baseT_Full)
 400                result |= ADVERTISE_1000XFULL;
 401        if (ethadv & ADVERTISED_Pause)
 402                result |= ADVERTISE_1000XPAUSE;
 403        if (ethadv & ADVERTISED_Asym_Pause)
 404                result |= ADVERTISE_1000XPSE_ASYM;
 405
 406        return result;
 407}
 408
 409/**
 410 * mii_adv_to_ethtool_adv_x
 411 * @adv: value of the MII_CTRL1000 register
 412 *
 413 * A small helper function that translates MII_CTRL1000
 414 * bits, when in 1000Base-X mode, to ethtool
 415 * advertisement settings.
 416 */
 417static inline u32 mii_adv_to_ethtool_adv_x(u32 adv)
 418{
 419        u32 result = 0;
 420
 421        if (adv & ADVERTISE_1000XHALF)
 422                result |= ADVERTISED_1000baseT_Half;
 423        if (adv & ADVERTISE_1000XFULL)
 424                result |= ADVERTISED_1000baseT_Full;
 425        if (adv & ADVERTISE_1000XPAUSE)
 426                result |= ADVERTISED_Pause;
 427        if (adv & ADVERTISE_1000XPSE_ASYM)
 428                result |= ADVERTISED_Asym_Pause;
 429
 430        return result;
 431}
 432
 433/**
 434 * mii_lpa_to_ethtool_lpa_x
 435 * @adv: value of the MII_LPA register
 436 *
 437 * A small helper function that translates MII_LPA
 438 * bits, when in 1000Base-X mode, to ethtool
 439 * LP advertisement settings.
 440 */
 441static inline u32 mii_lpa_to_ethtool_lpa_x(u32 lpa)
 442{
 443        u32 result = 0;
 444
 445        if (lpa & LPA_LPACK)
 446                result |= ADVERTISED_Autoneg;
 447
 448        return result | mii_adv_to_ethtool_adv_x(lpa);
 449}
 450
 451/**
 452 * mii_advertise_flowctrl - get flow control advertisement flags
 453 * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
 454 */
 455static inline u16 mii_advertise_flowctrl(int cap)
 456{
 457        u16 adv = 0;
 458
 459        if (cap & FLOW_CTRL_RX)
 460                adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 461        if (cap & FLOW_CTRL_TX)
 462                adv ^= ADVERTISE_PAUSE_ASYM;
 463
 464        return adv;
 465}
 466
 467/**
 468 * mii_resolve_flowctrl_fdx
 469 * @lcladv: value of MII ADVERTISE register
 470 * @rmtadv: value of MII LPA register
 471 *
 472 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
 473 */
 474static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
 475{
 476        u8 cap = 0;
 477
 478        if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
 479                cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
 480        } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
 481                if (lcladv & ADVERTISE_PAUSE_CAP)
 482                        cap = FLOW_CTRL_RX;
 483                else if (rmtadv & ADVERTISE_PAUSE_CAP)
 484                        cap = FLOW_CTRL_TX;
 485        }
 486
 487        return cap;
 488}
 489
 490#endif /* __KERNEL__ */
 491#endif /* __LINUX_MII_H__ */
 492
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