drivers/net/bcm5700/autoneg.c

   1 /******************************************************************************/
   2 /*                                                                            */
   3 /* Broadcom BCM5700 Linux Network Driver, Copyright (c) 2000 - 2004 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
  14 #ifdef INCLUDE_TBI_SUPPORT
  15 #include "mm.h"
  16
  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 /******************************************************************************/
  41 /* Description:                                                               */
  42 /*                                                                            */
  43 /* Return:                                                                    */
  44 /******************************************************************************/
  45 void
  46 MM_AnTxIdle(
  47     PAN_STATE_INFO pAnInfo)
  48 {
  49     PLM_DEVICE_BLOCK pDevice;
  50
  51     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  52
  53     pDevice->MacMode &= ~MAC_MODE_SEND_CONFIGS;
  54     REG_WR(pDevice, MacCtrl.Mode, pDevice->MacMode);
  55 }
  56
  57
  58
  59 /******************************************************************************/
  60 /* Description:                                                               */
  61 /*                                                                            */
  62 /* Return:                                                                    */
  63 /******************************************************************************/
  64 char
  65 MM_AnRxConfig(
  66     PAN_STATE_INFO pAnInfo,
  67     unsigned short *pRxConfig)
  68 {
  69     PLM_DEVICE_BLOCK pDevice;
  70     LM_UINT32 Value32;
  71     char Retcode;
  72
  73     Retcode = AN_FALSE;
  74
  75     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  76
  77     Value32 = REG_RD(pDevice, MacCtrl.Status);
  78     if(Value32 & MAC_STATUS_RECEIVING_CFG)
  79     {
  80         Value32 = REG_RD(pDevice, MacCtrl.RxAutoNeg);
  81         *pRxConfig = (unsigned short) Value32;
  82
  83         Retcode = AN_TRUE;
  84     }
  85
  86     return Retcode;
  87 }
  88
  89
  90
  91 /******************************************************************************/
  92 /* Description:                                                               */
  93 /*                                                                            */
  94 /* Return:                                                                    */
  95 /******************************************************************************/
  96 void
  97 AutonegInit(
  98     PAN_STATE_INFO pAnInfo)
  99 {
 100     unsigned long j;
 101
 102     for(j = 0; j < sizeof(AN_STATE_INFO); j++)
 103     {
 104         ((unsigned char *) pAnInfo)[j] = 0;
 105     }
 106
 107     /* Initialize the default advertisement register. */
 108     pAnInfo->mr_adv_full_duplex = 1;
 109     pAnInfo->mr_adv_sym_pause = 1;
 110     pAnInfo->mr_adv_asym_pause = 1;
 111     pAnInfo->mr_an_enable = 1;
 112 }
 113
 114
 115
 116 /******************************************************************************/
 117 /* Description:                                                               */
 118 /*                                                                            */
 119 /* Return:                                                                    */
 120 /******************************************************************************/
 121 AUTONEG_STATUS
 122 Autoneg8023z(
 123     PAN_STATE_INFO pAnInfo)
 124 {
 125     unsigned short RxConfig;
 126     unsigned long Delta_us;
 127     AUTONEG_STATUS AnRet;
 128
 129     /* Get the current time. */
 130     if(pAnInfo->State == AN_STATE_UNKNOWN)
 131     {
 132         pAnInfo->RxConfig.AsUSHORT = 0;
 133         pAnInfo->CurrentTime_us = 0;
 134         pAnInfo->LinkTime_us = 0;
 135         pAnInfo->AbilityMatchCfg = 0;
 136         pAnInfo->AbilityMatchCnt = 0;
 137         pAnInfo->AbilityMatch = AN_FALSE;
 138         pAnInfo->IdleMatch = AN_FALSE;
 139         pAnInfo->AckMatch = AN_FALSE;
 140     }
 141
 142     /* Increment the timer tick.  This function is called every microsecon. */
 143 //    pAnInfo->CurrentTime_us++;
 144
 145     /* Set the AbilityMatch, IdleMatch, and AckMatch flags if their */
 146     /* corresponding conditions are satisfied. */
 147     if(MM_AnRxConfig(pAnInfo, &RxConfig))
 148     {
 149         if(RxConfig != pAnInfo->AbilityMatchCfg)
 150         {
 151             pAnInfo->AbilityMatchCfg = RxConfig;
 152             pAnInfo->AbilityMatch = AN_FALSE;
 153             pAnInfo->AbilityMatchCnt = 0;
 154         }
 155         else
 156         {
 157             pAnInfo->AbilityMatchCnt++;
 158             if(pAnInfo->AbilityMatchCnt > 1)
 159             {
 160                 pAnInfo->AbilityMatch = AN_TRUE;
 161                 pAnInfo->AbilityMatchCfg = RxConfig;
 162             }
 163         }
 164
 165         if(RxConfig & AN_CONFIG_ACK)
 166         {
 167             pAnInfo->AckMatch = AN_TRUE;
 168         }
 169         else
 170         {
 171             pAnInfo->AckMatch = AN_FALSE;
 172         }
 173
 174         pAnInfo->IdleMatch = AN_FALSE;
 175     }
 176     else
 177     {
 178         pAnInfo->IdleMatch = AN_TRUE;
 179
 180         pAnInfo->AbilityMatchCfg = 0;
 181         pAnInfo->AbilityMatchCnt = 0;
 182         pAnInfo->AbilityMatch = AN_FALSE;
 183         pAnInfo->AckMatch = AN_FALSE;
 184
 185         RxConfig = 0;
 186     }
 187
 188     /* Save the last Config. */
 189     pAnInfo->RxConfig.AsUSHORT = RxConfig;
 190
 191     /* Default return code. */
 192     AnRet = AUTONEG_STATUS_OK;
 193
 194     /* Autoneg state machine as defined in 802.3z section 37.3.1.5. */
 195     switch(pAnInfo->State)
 196     {
 197         case AN_STATE_UNKNOWN:
 198             if(pAnInfo->mr_an_enable || pAnInfo->mr_restart_an)
 199             {
 200                 pAnInfo->CurrentTime_us = 0;
 201                 pAnInfo->State = AN_STATE_AN_ENABLE;
 202             }
 203
 204             /* Fall through.*/
 205
 206         case AN_STATE_AN_ENABLE:
 207             pAnInfo->mr_an_complete = AN_FALSE;
 208             pAnInfo->mr_page_rx = AN_FALSE;
 209
 210             if(pAnInfo->mr_an_enable)
 211             {
 212                 pAnInfo->LinkTime_us = 0;
 213                 pAnInfo->AbilityMatchCfg = 0;
 214                 pAnInfo->AbilityMatchCnt = 0;
 215                 pAnInfo->AbilityMatch = AN_FALSE;
 216                 pAnInfo->IdleMatch = AN_FALSE;
 217                 pAnInfo->AckMatch = AN_FALSE;
 218
 219                 pAnInfo->State = AN_STATE_AN_RESTART_INIT;
 220             }
 221             else
 222             {
 223                 pAnInfo->State = AN_STATE_DISABLE_LINK_OK;
 224             }
 225             break;
 226
 227         case AN_STATE_AN_RESTART_INIT:
 228             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 229             pAnInfo->mr_np_loaded = AN_FALSE;
 230
 231             pAnInfo->TxConfig.AsUSHORT = 0;
 232             MM_AnTxConfig(pAnInfo);
 233
 234             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 235
 236             pAnInfo->State = AN_STATE_AN_RESTART;
 237
 238             /* Fall through.*/
 239
 240         case AN_STATE_AN_RESTART:
 241             /* Get the current time and compute the delta with the saved */
 242             /* link timer. */
 243             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 244             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 245             {
 246                 pAnInfo->State = AN_STATE_ABILITY_DETECT_INIT;
 247             }
 248             else
 249             {
 250                 AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 251             }
 252             break;
 253
 254         case AN_STATE_DISABLE_LINK_OK:
 255             AnRet = AUTONEG_STATUS_DONE;
 256             break;
 257
 258         case AN_STATE_ABILITY_DETECT_INIT:
 259             /* Note: in the state diagram, this variable is set to */
 260             /* mr_adv_ability<12>.  Is this right?. */
 261             pAnInfo->mr_toggle_tx = AN_FALSE;
 262
 263             /* Send the config as advertised in the advertisement register. */
 264             pAnInfo->TxConfig.AsUSHORT = 0;
 265             pAnInfo->TxConfig.D5_FD = pAnInfo->mr_adv_full_duplex;
 266             pAnInfo->TxConfig.D6_HD = pAnInfo->mr_adv_half_duplex;
 267             pAnInfo->TxConfig.D7_PS1 = pAnInfo->mr_adv_sym_pause;
 268             pAnInfo->TxConfig.D8_PS2 = pAnInfo->mr_adv_asym_pause;
 269             pAnInfo->TxConfig.D12_RF1 = pAnInfo->mr_adv_remote_fault1;
 270             pAnInfo->TxConfig.D13_RF2 = pAnInfo->mr_adv_remote_fault2;
 271             pAnInfo->TxConfig.D15_NP = pAnInfo->mr_adv_next_page;
 272
 273             MM_AnTxConfig(pAnInfo);
 274
 275             pAnInfo->State = AN_STATE_ABILITY_DETECT;
 276
 277             break;
 278
 279         case AN_STATE_ABILITY_DETECT:
 280             if(pAnInfo->AbilityMatch == AN_TRUE &&
 281                 pAnInfo->RxConfig.AsUSHORT != 0)
 282             {
 283                 pAnInfo->State = AN_STATE_ACK_DETECT_INIT;
 284             }
 285
 286             break;
 287
 288         case AN_STATE_ACK_DETECT_INIT:
 289             pAnInfo->TxConfig.D14_ACK = 1;
 290             MM_AnTxConfig(pAnInfo);
 291
 292             pAnInfo->State = AN_STATE_ACK_DETECT;
 293
 294             /* Fall through. */
 295
 296         case AN_STATE_ACK_DETECT:
 297             if(pAnInfo->AckMatch == AN_TRUE)
 298             {
 299                 if((pAnInfo->RxConfig.AsUSHORT & ~AN_CONFIG_ACK) ==
 300                     (pAnInfo->AbilityMatchCfg & ~AN_CONFIG_ACK))
 301                 {
 302                     pAnInfo->State = AN_STATE_COMPLETE_ACK_INIT;
 303                 }
 304                 else
 305                 {
 306                     pAnInfo->State = AN_STATE_AN_ENABLE;
 307                 }
 308             }
 309             else if(pAnInfo->AbilityMatch == AN_TRUE &&
 310                 pAnInfo->RxConfig.AsUSHORT == 0)
 311             {
 312                 pAnInfo->State = AN_STATE_AN_ENABLE;
 313             }
 314
 315             break;
 316
 317         case AN_STATE_COMPLETE_ACK_INIT:
 318             /* Make sure invalid bits are not set. */
 319             if(pAnInfo->RxConfig.bits.D0 || pAnInfo->RxConfig.bits.D1 ||
 320                 pAnInfo->RxConfig.bits.D2 || pAnInfo->RxConfig.bits.D3 ||
 321                 pAnInfo->RxConfig.bits.D4 || pAnInfo->RxConfig.bits.D9 ||
 322                 pAnInfo->RxConfig.bits.D10 || pAnInfo->RxConfig.bits.D11)
 323             {
 324                 AnRet = AUTONEG_STATUS_FAILED;
 325                 break;
 326             }
 327
 328             /* Set up the link partner advertisement register. */
 329             pAnInfo->mr_lp_adv_full_duplex = pAnInfo->RxConfig.D5_FD;
 330             pAnInfo->mr_lp_adv_half_duplex = pAnInfo->RxConfig.D6_HD;
 331             pAnInfo->mr_lp_adv_sym_pause = pAnInfo->RxConfig.D7_PS1;
 332             pAnInfo->mr_lp_adv_asym_pause = pAnInfo->RxConfig.D8_PS2;
 333             pAnInfo->mr_lp_adv_remote_fault1 = pAnInfo->RxConfig.D12_RF1;
 334             pAnInfo->mr_lp_adv_remote_fault2 = pAnInfo->RxConfig.D13_RF2;
 335             pAnInfo->mr_lp_adv_next_page = pAnInfo->RxConfig.D15_NP;
 336
 337             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 338
 339             pAnInfo->mr_toggle_tx = !pAnInfo->mr_toggle_tx;
 340             pAnInfo->mr_toggle_rx = pAnInfo->RxConfig.bits.D11;
 341             pAnInfo->mr_np_rx = pAnInfo->RxConfig.D15_NP;
 342             pAnInfo->mr_page_rx = AN_TRUE;
 343
 344             pAnInfo->State = AN_STATE_COMPLETE_ACK;
 345             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 346
 347             break;
 348
 349         case AN_STATE_COMPLETE_ACK:
 350             if(pAnInfo->AbilityMatch == AN_TRUE &&
 351                 pAnInfo->RxConfig.AsUSHORT == 0)
 352             {
 353                 pAnInfo->State = AN_STATE_AN_ENABLE;
 354                 break;
 355             }
 356
 357             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 358
 359             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 360             {
 361                 if(pAnInfo->mr_adv_next_page == 0 ||
 362                     pAnInfo->mr_lp_adv_next_page == 0)
 363                 {
 364                     pAnInfo->State = AN_STATE_IDLE_DETECT_INIT;
 365                 }
 366                 else
 367                 {
 368                     if(pAnInfo->TxConfig.bits.D15 == 0 &&
 369                         pAnInfo->mr_np_rx == 0)
 370                     {
 371                         pAnInfo->State = AN_STATE_IDLE_DETECT_INIT;
 372                     }
 373                     else
 374                     {
 375                         AnRet = AUTONEG_STATUS_FAILED;
 376                     }
 377                 }
 378             }
 379
 380             break;
 381
 382         case AN_STATE_IDLE_DETECT_INIT:
 383             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 384
 385             MM_AnTxIdle(pAnInfo);
 386
 387             pAnInfo->State = AN_STATE_IDLE_DETECT;
 388
 389             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 390
 391             break;
 392
 393         case AN_STATE_IDLE_DETECT:
 394             if(pAnInfo->AbilityMatch == AN_TRUE &&
 395                 pAnInfo->RxConfig.AsUSHORT == 0)
 396             {
 397                 pAnInfo->State = AN_STATE_AN_ENABLE;
 398                 break;
 399             }
 400
 401             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 402             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 403             {
 404 //                if(pAnInfo->IdleMatch == AN_TRUE)
 405 //                {
 406                     pAnInfo->State = AN_STATE_LINK_OK;
 407 //                }
 408 //                else
 409 //                {
 410 //                    AnRet = AUTONEG_STATUS_FAILED;
 411 //                    break;
 412 //                }
 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