drivers/net/bcm570x_autoneg.c

   1 /******************************************************************************/
   2 /*                                                                            */
   3 /* Broadcom BCM5700 Linux Network Driver, Copyright (c) 2001 Broadcom         */
   4 /* Corporation.                                                               */
   5 /* All rights reserved.                                                       */
   6 /*                                                                            */
   7 /* This program is free software; you can redistribute it and/or modify       */
   8 /* it under the terms of the GNU General Public License as published by       */
   9 /* the Free Software Foundation, located in the file LICENSE.                 */
  10 /*                                                                            */
  11 /* History:                                                                   */
  12 /******************************************************************************/
  13 #if !defined(CONFIG_NET_MULTI)
  14 #if INCLUDE_TBI_SUPPORT
  15 #include "bcm570x_autoneg.h"
  16 #include "bcm570x_mm.h"
  17
  18
  19 /******************************************************************************/
  20 /* Description:                                                               */
  21 /*                                                                            */
  22 /* Return:                                                                    */
  23 /******************************************************************************/
  24 void
  25 MM_AnTxConfig(
  26     PAN_STATE_INFO pAnInfo)
  27 {
  28     PLM_DEVICE_BLOCK pDevice;
  29
  30     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  31
  32     REG_WR(pDevice, MacCtrl.TxAutoNeg, (LM_UINT32) pAnInfo->TxConfig.AsUSHORT);
  33
  34     pDevice->MacMode |= MAC_MODE_SEND_CONFIGS;
  35     REG_WR(pDevice, MacCtrl.Mode, pDevice->MacMode);
  36 }
  37
  38
  39 /******************************************************************************/
  40 /* Description:                                                               */
  41 /*                                                                            */
  42 /* Return:                                                                    */
  43 /******************************************************************************/
  44 void
  45 MM_AnTxIdle(
  46     PAN_STATE_INFO pAnInfo)
  47 {
  48     PLM_DEVICE_BLOCK pDevice;
  49
  50     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  51
  52     pDevice->MacMode &= ~MAC_MODE_SEND_CONFIGS;
  53     REG_WR(pDevice, MacCtrl.Mode, pDevice->MacMode);
  54 }
  55
  56
  57 /******************************************************************************/
  58 /* Description:                                                               */
  59 /*                                                                            */
  60 /* Return:                                                                    */
  61 /******************************************************************************/
  62 char
  63 MM_AnRxConfig(
  64     PAN_STATE_INFO pAnInfo,
  65     unsigned short *pRxConfig)
  66 {
  67     PLM_DEVICE_BLOCK pDevice;
  68     LM_UINT32 Value32;
  69     char Retcode;
  70
  71     Retcode = AN_FALSE;
  72
  73     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  74
  75     Value32 = REG_RD(pDevice, MacCtrl.Status);
  76     if(Value32 & MAC_STATUS_RECEIVING_CFG)
  77     {
  78         Value32 = REG_RD(pDevice, MacCtrl.RxAutoNeg);
  79         *pRxConfig = (unsigned short) Value32;
  80
  81         Retcode = AN_TRUE;
  82     }
  83
  84     return Retcode;
  85 }
  86
  87
  88 /******************************************************************************/
  89 /* Description:                                                               */
  90 /*                                                                            */
  91 /* Return:                                                                    */
  92 /******************************************************************************/
  93 void
  94 AutonegInit(
  95     PAN_STATE_INFO pAnInfo)
  96 {
  97     unsigned long j;
  98
  99     for(j = 0; j < sizeof(AN_STATE_INFO); j++)
 100     {
 101         ((unsigned char *) pAnInfo)[j] = 0;
 102     }
 103
 104     /* Initialize the default advertisement register. */
 105     pAnInfo->mr_adv_full_duplex = 1;
 106     pAnInfo->mr_adv_sym_pause = 1;
 107     pAnInfo->mr_adv_asym_pause = 1;
 108     pAnInfo->mr_an_enable = 1;
 109 }
 110
 111
 112 /******************************************************************************/
 113 /* Description:                                                               */
 114 /*                                                                            */
 115 /* Return:                                                                    */
 116 /******************************************************************************/
 117 AUTONEG_STATUS
 118 Autoneg8023z(
 119     PAN_STATE_INFO pAnInfo)
 120 {
 121     unsigned short RxConfig;
 122     unsigned long Delta_us;
 123     AUTONEG_STATUS AnRet;
 124
 125     /* Get the current time. */
 126     if(pAnInfo->State == AN_STATE_UNKNOWN)
 127     {
 128         pAnInfo->RxConfig.AsUSHORT = 0;
 129         pAnInfo->CurrentTime_us = 0;
 130         pAnInfo->LinkTime_us = 0;
 131         pAnInfo->AbilityMatchCfg = 0;
 132         pAnInfo->AbilityMatchCnt = 0;
 133         pAnInfo->AbilityMatch = AN_FALSE;
 134         pAnInfo->IdleMatch = AN_FALSE;
 135         pAnInfo->AckMatch = AN_FALSE;
 136     }
 137
 138     /* Increment the timer tick.  This function is called every microsecon. */
 139 /*    pAnInfo->CurrentTime_us++; */
 140
 141     /* Set the AbilityMatch, IdleMatch, and AckMatch flags if their */
 142     /* corresponding conditions are satisfied. */
 143     if(MM_AnRxConfig(pAnInfo, &RxConfig))
 144     {
 145         if(RxConfig != pAnInfo->AbilityMatchCfg)
 146         {
 147             pAnInfo->AbilityMatchCfg = RxConfig;
 148             pAnInfo->AbilityMatch = AN_FALSE;
 149             pAnInfo->AbilityMatchCnt = 0;
 150         }
 151         else
 152         {
 153             pAnInfo->AbilityMatchCnt++;
 154             if(pAnInfo->AbilityMatchCnt > 1)
 155             {
 156                 pAnInfo->AbilityMatch = AN_TRUE;
 157                 pAnInfo->AbilityMatchCfg = RxConfig;
 158             }
 159         }
 160
 161         if(RxConfig & AN_CONFIG_ACK)
 162         {
 163             pAnInfo->AckMatch = AN_TRUE;
 164         }
 165         else
 166         {
 167             pAnInfo->AckMatch = AN_FALSE;
 168         }
 169
 170         pAnInfo->IdleMatch = AN_FALSE;
 171     }
 172     else
 173     {
 174         pAnInfo->IdleMatch = AN_TRUE;
 175
 176         pAnInfo->AbilityMatchCfg = 0;
 177         pAnInfo->AbilityMatchCnt = 0;
 178         pAnInfo->AbilityMatch = AN_FALSE;
 179         pAnInfo->AckMatch = AN_FALSE;
 180
 181         RxConfig = 0;
 182     }
 183
 184     /* Save the last Config. */
 185     pAnInfo->RxConfig.AsUSHORT = RxConfig;
 186
 187     /* Default return code. */
 188     AnRet = AUTONEG_STATUS_OK;
 189
 190     /* Autoneg state machine as defined in 802.3z section 37.3.1.5. */
 191     switch(pAnInfo->State)
 192     {
 193         case AN_STATE_UNKNOWN:
 194             if(pAnInfo->mr_an_enable || pAnInfo->mr_restart_an)
 195             {
 196                 pAnInfo->CurrentTime_us = 0;
 197                 pAnInfo->State = AN_STATE_AN_ENABLE;
 198             }
 199
 200             /* Fall through.*/
 201
 202         case AN_STATE_AN_ENABLE:
 203             pAnInfo->mr_an_complete = AN_FALSE;
 204             pAnInfo->mr_page_rx = AN_FALSE;
 205
 206             if(pAnInfo->mr_an_enable)
 207             {
 208                 pAnInfo->LinkTime_us = 0;
 209                 pAnInfo->AbilityMatchCfg = 0;
 210                 pAnInfo->AbilityMatchCnt = 0;
 211                 pAnInfo->AbilityMatch = AN_FALSE;
 212                 pAnInfo->IdleMatch = AN_FALSE;
 213                 pAnInfo->AckMatch = AN_FALSE;
 214
 215                 pAnInfo->State = AN_STATE_AN_RESTART_INIT;
 216             }
 217             else
 218             {
 219                 pAnInfo->State = AN_STATE_DISABLE_LINK_OK;
 220             }
 221             break;
 222
 223         case AN_STATE_AN_RESTART_INIT:
 224             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 225             pAnInfo->mr_np_loaded = AN_FALSE;
 226
 227             pAnInfo->TxConfig.AsUSHORT = 0;
 228             MM_AnTxConfig(pAnInfo);
 229
 230             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 231
 232             pAnInfo->State = AN_STATE_AN_RESTART;
 233
 234             /* Fall through.*/
 235
 236         case AN_STATE_AN_RESTART:
 237             /* Get the current time and compute the delta with the saved */
 238             /* link timer. */
 239             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 240             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 241             {
 242                 pAnInfo->State = AN_STATE_ABILITY_DETECT_INIT;
 243             }
 244             else
 245             {
 246                 AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 247             }
 248             break;
 249
 250         case AN_STATE_DISABLE_LINK_OK:
 251             AnRet = AUTONEG_STATUS_DONE;
 252             break;
 253
 254         case AN_STATE_ABILITY_DETECT_INIT:
 255             /* Note: in the state diagram, this variable is set to */
 256             /* mr_adv_ability<12>.  Is this right?. */
 257             pAnInfo->mr_toggle_tx = AN_FALSE;
 258
 259             /* Send the config as advertised in the advertisement register. */
 260             pAnInfo->TxConfig.AsUSHORT = 0;
 261             pAnInfo->TxConfig.D5_FD = pAnInfo->mr_adv_full_duplex;
 262             pAnInfo->TxConfig.D6_HD = pAnInfo->mr_adv_half_duplex;
 263             pAnInfo->TxConfig.D7_PS1 = pAnInfo->mr_adv_sym_pause;
 264             pAnInfo->TxConfig.D8_PS2 = pAnInfo->mr_adv_asym_pause;
 265             pAnInfo->TxConfig.D12_RF1 = pAnInfo->mr_adv_remote_fault1;
 266             pAnInfo->TxConfig.D13_RF2 = pAnInfo->mr_adv_remote_fault2;
 267             pAnInfo->TxConfig.D15_NP = pAnInfo->mr_adv_next_page;
 268
 269             MM_AnTxConfig(pAnInfo);
 270
 271             pAnInfo->State = AN_STATE_ABILITY_DETECT;
 272
 273             break;
 274
 275         case AN_STATE_ABILITY_DETECT:
 276             if(pAnInfo->AbilityMatch == AN_TRUE &&
 277                 pAnInfo->RxConfig.AsUSHORT != 0)
 278             {
 279                 pAnInfo->State = AN_STATE_ACK_DETECT_INIT;
 280             }
 281
 282             break;
 283
 284         case AN_STATE_ACK_DETECT_INIT:
 285             pAnInfo->TxConfig.D14_ACK = 1;
 286             MM_AnTxConfig(pAnInfo);
 287
 288             pAnInfo->State = AN_STATE_ACK_DETECT;
 289
 290             /* Fall through. */
 291
 292         case AN_STATE_ACK_DETECT:
 293             if(pAnInfo->AckMatch == AN_TRUE)
 294             {
 295                 if((pAnInfo->RxConfig.AsUSHORT & ~AN_CONFIG_ACK) ==
 296                     (pAnInfo->AbilityMatchCfg & ~AN_CONFIG_ACK))
 297                 {
 298                     pAnInfo->State = AN_STATE_COMPLETE_ACK_INIT;
 299                 }
 300                 else
 301                 {
 302                     pAnInfo->State = AN_STATE_AN_ENABLE;
 303                 }
 304             }
 305             else if(pAnInfo->AbilityMatch == AN_TRUE &&
 306                 pAnInfo->RxConfig.AsUSHORT == 0)
 307             {
 308                 pAnInfo->State = AN_STATE_AN_ENABLE;
 309             }
 310
 311             break;
 312
 313         case AN_STATE_COMPLETE_ACK_INIT:
 314             /* Make sure invalid bits are not set. */
 315             if(pAnInfo->RxConfig.bits.D0 || pAnInfo->RxConfig.bits.D1 ||
 316                 pAnInfo->RxConfig.bits.D2 || pAnInfo->RxConfig.bits.D3 ||
 317                 pAnInfo->RxConfig.bits.D4 || pAnInfo->RxConfig.bits.D9 ||
 318                 pAnInfo->RxConfig.bits.D10 || pAnInfo->RxConfig.bits.D11)
 319             {
 320                 AnRet = AUTONEG_STATUS_FAILED;
 321                 break;
 322             }
 323
 324             /* Set up the link partner advertisement register. */
 325             pAnInfo->mr_lp_adv_full_duplex = pAnInfo->RxConfig.D5_FD;
 326             pAnInfo->mr_lp_adv_half_duplex = pAnInfo->RxConfig.D6_HD;
 327             pAnInfo->mr_lp_adv_sym_pause = pAnInfo->RxConfig.D7_PS1;
 328             pAnInfo->mr_lp_adv_asym_pause = pAnInfo->RxConfig.D8_PS2;
 329             pAnInfo->mr_lp_adv_remote_fault1 = pAnInfo->RxConfig.D12_RF1;
 330             pAnInfo->mr_lp_adv_remote_fault2 = pAnInfo->RxConfig.D13_RF2;
 331             pAnInfo->mr_lp_adv_next_page = pAnInfo->RxConfig.D15_NP;
 332
 333             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 334
 335             pAnInfo->mr_toggle_tx = !pAnInfo->mr_toggle_tx;
 336             pAnInfo->mr_toggle_rx = pAnInfo->RxConfig.bits.D11;
 337             pAnInfo->mr_np_rx = pAnInfo->RxConfig.D15_NP;
 338             pAnInfo->mr_page_rx = AN_TRUE;
 339
 340             pAnInfo->State = AN_STATE_COMPLETE_ACK;
 341             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 342
 343             break;
 344
 345         case AN_STATE_COMPLETE_ACK:
 346             if(pAnInfo->AbilityMatch == AN_TRUE &&
 347                 pAnInfo->RxConfig.AsUSHORT == 0)
 348             {
 349                 pAnInfo->State = AN_STATE_AN_ENABLE;
 350                 break;
 351             }
 352
 353             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 354
 355             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 356             {
 357                 if(pAnInfo->mr_adv_next_page == 0 ||
 358                     pAnInfo->mr_lp_adv_next_page == 0)
 359                 {
 360                     pAnInfo->State = AN_STATE_IDLE_DETECT_INIT;
 361                 }
 362                 else
 363                 {
 364                     if(pAnInfo->TxConfig.bits.D15 == 0 &&
 365                         pAnInfo->mr_np_rx == 0)
 366                     {
 367                         pAnInfo->State = AN_STATE_IDLE_DETECT_INIT;
 368                     }
 369                     else
 370                     {
 371                         AnRet = AUTONEG_STATUS_FAILED;
 372                     }
 373                 }
 374             }
 375
 376             break;
 377
 378         case AN_STATE_IDLE_DETECT_INIT:
 379             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 380
 381             MM_AnTxIdle(pAnInfo);
 382
 383             pAnInfo->State = AN_STATE_IDLE_DETECT;
 384
 385             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 386
 387             break;
 388
 389         case AN_STATE_IDLE_DETECT:
 390             if(pAnInfo->AbilityMatch == AN_TRUE &&
 391                 pAnInfo->RxConfig.AsUSHORT == 0)
 392             {
 393                 pAnInfo->State = AN_STATE_AN_ENABLE;
 394                 break;
 395             }
 396
 397             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 398             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 399             {
 400 #if 0
 401 /*                if(pAnInfo->IdleMatch == AN_TRUE) */
 402 /*                { */
 403 #endif
 404                     pAnInfo->State = AN_STATE_LINK_OK;
 405 #if 0
 406 /*                } */
 407 /*                else */
 408 /*                { */
 409 /*                    AnRet = AUTONEG_STATUS_FAILED; */
 410 /*                    break; */
 411 /*                } */
 412 #endif
 413             }
 414
 415             break;
 416
 417         case AN_STATE_LINK_OK:
 418             pAnInfo->mr_an_complete = AN_TRUE;
 419             pAnInfo->mr_link_ok = AN_TRUE;
 420             AnRet = AUTONEG_STATUS_DONE;
 421
 422             break;
 423
 424         case AN_STATE_NEXT_PAGE_WAIT_INIT:
 425             break;
 426
 427         case AN_STATE_NEXT_PAGE_WAIT:
 428             break;
 429
 430         default:
 431             AnRet = AUTONEG_STATUS_FAILED;
 432             break;
 433     }
 434
 435     return AnRet;
 436 }
 437 #endif /* INCLUDE_TBI_SUPPORT */
 438
 439 #endif /* !defined(CONFIG_NET_MULTI) */