drivers/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 /******************************************************************************/
  21 /* Description:                                                               */
  22 /*                                                                            */
  23 /* Return:                                                                    */
  24 /******************************************************************************/
  25 void
  26 MM_AnTxConfig(
  27     PAN_STATE_INFO pAnInfo)
  28 {
  29     PLM_DEVICE_BLOCK pDevice;
  30
  31     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  32
  33     REG_WR(pDevice, MacCtrl.TxAutoNeg, (LM_UINT32) pAnInfo->TxConfig.AsUSHORT);
  34
  35     pDevice->MacMode |= MAC_MODE_SEND_CONFIGS;
  36     REG_WR(pDevice, MacCtrl.Mode, pDevice->MacMode);
  37 }
  38
  39
  40
  41 /******************************************************************************/
  42 /* Description:                                                               */
  43 /*                                                                            */
  44 /* Return:                                                                    */
  45 /******************************************************************************/
  46 void
  47 MM_AnTxIdle(
  48     PAN_STATE_INFO pAnInfo)
  49 {
  50     PLM_DEVICE_BLOCK pDevice;
  51
  52     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  53
  54     pDevice->MacMode &= ~MAC_MODE_SEND_CONFIGS;
  55     REG_WR(pDevice, MacCtrl.Mode, pDevice->MacMode);
  56 }
  57
  58
  59
  60 /******************************************************************************/
  61 /* Description:                                                               */
  62 /*                                                                            */
  63 /* Return:                                                                    */
  64 /******************************************************************************/
  65 char
  66 MM_AnRxConfig(
  67     PAN_STATE_INFO pAnInfo,
  68     unsigned short *pRxConfig)
  69 {
  70     PLM_DEVICE_BLOCK pDevice;
  71     LM_UINT32 Value32;
  72     char Retcode;
  73
  74     Retcode = AN_FALSE;
  75
  76     pDevice = (PLM_DEVICE_BLOCK) pAnInfo->pContext;
  77
  78     Value32 = REG_RD(pDevice, MacCtrl.Status);
  79     if(Value32 & MAC_STATUS_RECEIVING_CFG)
  80     {
  81         Value32 = REG_RD(pDevice, MacCtrl.RxAutoNeg);
  82         *pRxConfig = (unsigned short) Value32;
  83
  84         Retcode = AN_TRUE;
  85     }
  86
  87     return Retcode;
  88 }
  89
  90
  91
  92 /******************************************************************************/
  93 /* Description:                                                               */
  94 /*                                                                            */
  95 /* Return:                                                                    */
  96 /******************************************************************************/
  97 void
  98 AutonegInit(
  99     PAN_STATE_INFO pAnInfo)
 100 {
 101     unsigned long j;
 102
 103     for(j = 0; j < sizeof(AN_STATE_INFO); j++)
 104     {
 105         ((unsigned char *) pAnInfo)[j] = 0;
 106     }
 107
 108     /* Initialize the default advertisement register. */
 109     pAnInfo->mr_adv_full_duplex = 1;
 110     pAnInfo->mr_adv_sym_pause = 1;
 111     pAnInfo->mr_adv_asym_pause = 1;
 112     pAnInfo->mr_an_enable = 1;
 113 }
 114
 115
 116
 117 /******************************************************************************/
 118 /* Description:                                                               */
 119 /*                                                                            */
 120 /* Return:                                                                    */
 121 /******************************************************************************/
 122 AUTONEG_STATUS
 123 Autoneg8023z(
 124     PAN_STATE_INFO pAnInfo)
 125 {
 126     unsigned short RxConfig;
 127     unsigned long Delta_us;
 128     AUTONEG_STATUS AnRet;
 129
 130     /* Get the current time. */
 131     if(pAnInfo->State == AN_STATE_UNKNOWN)
 132     {
 133         pAnInfo->RxConfig.AsUSHORT = 0;
 134         pAnInfo->CurrentTime_us = 0;
 135         pAnInfo->LinkTime_us = 0;
 136         pAnInfo->AbilityMatchCfg = 0;
 137         pAnInfo->AbilityMatchCnt = 0;
 138         pAnInfo->AbilityMatch = AN_FALSE;
 139         pAnInfo->IdleMatch = AN_FALSE;
 140         pAnInfo->AckMatch = AN_FALSE;
 141     }
 142
 143     /* Increment the timer tick.  This function is called every microsecon. */
 144 /*    pAnInfo->CurrentTime_us++; */
 145
 146     /* Set the AbilityMatch, IdleMatch, and AckMatch flags if their */
 147     /* corresponding conditions are satisfied. */
 148     if(MM_AnRxConfig(pAnInfo, &RxConfig))
 149     {
 150         if(RxConfig != pAnInfo->AbilityMatchCfg)
 151         {
 152             pAnInfo->AbilityMatchCfg = RxConfig;
 153             pAnInfo->AbilityMatch = AN_FALSE;
 154             pAnInfo->AbilityMatchCnt = 0;
 155         }
 156         else
 157         {
 158             pAnInfo->AbilityMatchCnt++;
 159             if(pAnInfo->AbilityMatchCnt > 1)
 160             {
 161                 pAnInfo->AbilityMatch = AN_TRUE;
 162                 pAnInfo->AbilityMatchCfg = RxConfig;
 163             }
 164         }
 165
 166         if(RxConfig & AN_CONFIG_ACK)
 167         {
 168             pAnInfo->AckMatch = AN_TRUE;
 169         }
 170         else
 171         {
 172             pAnInfo->AckMatch = AN_FALSE;
 173         }
 174
 175         pAnInfo->IdleMatch = AN_FALSE;
 176     }
 177     else
 178     {
 179         pAnInfo->IdleMatch = AN_TRUE;
 180
 181         pAnInfo->AbilityMatchCfg = 0;
 182         pAnInfo->AbilityMatchCnt = 0;
 183         pAnInfo->AbilityMatch = AN_FALSE;
 184         pAnInfo->AckMatch = AN_FALSE;
 185
 186         RxConfig = 0;
 187     }
 188
 189     /* Save the last Config. */
 190     pAnInfo->RxConfig.AsUSHORT = RxConfig;
 191
 192     /* Default return code. */
 193     AnRet = AUTONEG_STATUS_OK;
 194
 195     /* Autoneg state machine as defined in 802.3z section 37.3.1.5. */
 196     switch(pAnInfo->State)
 197     {
 198         case AN_STATE_UNKNOWN:
 199             if(pAnInfo->mr_an_enable || pAnInfo->mr_restart_an)
 200             {
 201                 pAnInfo->CurrentTime_us = 0;
 202                 pAnInfo->State = AN_STATE_AN_ENABLE;
 203             }
 204
 205             /* Fall through.*/
 206
 207         case AN_STATE_AN_ENABLE:
 208             pAnInfo->mr_an_complete = AN_FALSE;
 209             pAnInfo->mr_page_rx = AN_FALSE;
 210
 211             if(pAnInfo->mr_an_enable)
 212             {
 213                 pAnInfo->LinkTime_us = 0;
 214                 pAnInfo->AbilityMatchCfg = 0;
 215                 pAnInfo->AbilityMatchCnt = 0;
 216                 pAnInfo->AbilityMatch = AN_FALSE;
 217                 pAnInfo->IdleMatch = AN_FALSE;
 218                 pAnInfo->AckMatch = AN_FALSE;
 219
 220                 pAnInfo->State = AN_STATE_AN_RESTART_INIT;
 221             }
 222             else
 223             {
 224                 pAnInfo->State = AN_STATE_DISABLE_LINK_OK;
 225             }
 226             break;
 227
 228         case AN_STATE_AN_RESTART_INIT:
 229             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 230             pAnInfo->mr_np_loaded = AN_FALSE;
 231
 232             pAnInfo->TxConfig.AsUSHORT = 0;
 233             MM_AnTxConfig(pAnInfo);
 234
 235             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 236
 237             pAnInfo->State = AN_STATE_AN_RESTART;
 238
 239             /* Fall through.*/
 240
 241         case AN_STATE_AN_RESTART:
 242             /* Get the current time and compute the delta with the saved */
 243             /* link timer. */
 244             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 245             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 246             {
 247                 pAnInfo->State = AN_STATE_ABILITY_DETECT_INIT;
 248             }
 249             else
 250             {
 251                 AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 252             }
 253             break;
 254
 255         case AN_STATE_DISABLE_LINK_OK:
 256             AnRet = AUTONEG_STATUS_DONE;
 257             break;
 258
 259         case AN_STATE_ABILITY_DETECT_INIT:
 260             /* Note: in the state diagram, this variable is set to */
 261             /* mr_adv_ability<12>.  Is this right?. */
 262             pAnInfo->mr_toggle_tx = AN_FALSE;
 263
 264             /* Send the config as advertised in the advertisement register. */
 265             pAnInfo->TxConfig.AsUSHORT = 0;
 266             pAnInfo->TxConfig.D5_FD = pAnInfo->mr_adv_full_duplex;
 267             pAnInfo->TxConfig.D6_HD = pAnInfo->mr_adv_half_duplex;
 268             pAnInfo->TxConfig.D7_PS1 = pAnInfo->mr_adv_sym_pause;
 269             pAnInfo->TxConfig.D8_PS2 = pAnInfo->mr_adv_asym_pause;
 270             pAnInfo->TxConfig.D12_RF1 = pAnInfo->mr_adv_remote_fault1;
 271             pAnInfo->TxConfig.D13_RF2 = pAnInfo->mr_adv_remote_fault2;
 272             pAnInfo->TxConfig.D15_NP = pAnInfo->mr_adv_next_page;
 273
 274             MM_AnTxConfig(pAnInfo);
 275
 276             pAnInfo->State = AN_STATE_ABILITY_DETECT;
 277
 278             break;
 279
 280         case AN_STATE_ABILITY_DETECT:
 281             if(pAnInfo->AbilityMatch == AN_TRUE &&
 282                 pAnInfo->RxConfig.AsUSHORT != 0)
 283             {
 284                 pAnInfo->State = AN_STATE_ACK_DETECT_INIT;
 285             }
 286
 287             break;
 288
 289         case AN_STATE_ACK_DETECT_INIT:
 290             pAnInfo->TxConfig.D14_ACK = 1;
 291             MM_AnTxConfig(pAnInfo);
 292
 293             pAnInfo->State = AN_STATE_ACK_DETECT;
 294
 295             /* Fall through. */
 296
 297         case AN_STATE_ACK_DETECT:
 298             if(pAnInfo->AckMatch == AN_TRUE)
 299             {
 300                 if((pAnInfo->RxConfig.AsUSHORT & ~AN_CONFIG_ACK) ==
 301                     (pAnInfo->AbilityMatchCfg & ~AN_CONFIG_ACK))
 302                 {
 303                     pAnInfo->State = AN_STATE_COMPLETE_ACK_INIT;
 304                 }
 305                 else
 306                 {
 307                     pAnInfo->State = AN_STATE_AN_ENABLE;
 308                 }
 309             }
 310             else if(pAnInfo->AbilityMatch == AN_TRUE &&
 311                 pAnInfo->RxConfig.AsUSHORT == 0)
 312             {
 313                 pAnInfo->State = AN_STATE_AN_ENABLE;
 314             }
 315
 316             break;
 317
 318         case AN_STATE_COMPLETE_ACK_INIT:
 319             /* Make sure invalid bits are not set. */
 320             if(pAnInfo->RxConfig.bits.D0 || pAnInfo->RxConfig.bits.D1 ||
 321                 pAnInfo->RxConfig.bits.D2 || pAnInfo->RxConfig.bits.D3 ||
 322                 pAnInfo->RxConfig.bits.D4 || pAnInfo->RxConfig.bits.D9 ||
 323                 pAnInfo->RxConfig.bits.D10 || pAnInfo->RxConfig.bits.D11)
 324             {
 325                 AnRet = AUTONEG_STATUS_FAILED;
 326                 break;
 327             }
 328
 329             /* Set up the link partner advertisement register. */
 330             pAnInfo->mr_lp_adv_full_duplex = pAnInfo->RxConfig.D5_FD;
 331             pAnInfo->mr_lp_adv_half_duplex = pAnInfo->RxConfig.D6_HD;
 332             pAnInfo->mr_lp_adv_sym_pause = pAnInfo->RxConfig.D7_PS1;
 333             pAnInfo->mr_lp_adv_asym_pause = pAnInfo->RxConfig.D8_PS2;
 334             pAnInfo->mr_lp_adv_remote_fault1 = pAnInfo->RxConfig.D12_RF1;
 335             pAnInfo->mr_lp_adv_remote_fault2 = pAnInfo->RxConfig.D13_RF2;
 336             pAnInfo->mr_lp_adv_next_page = pAnInfo->RxConfig.D15_NP;
 337
 338             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 339
 340             pAnInfo->mr_toggle_tx = !pAnInfo->mr_toggle_tx;
 341             pAnInfo->mr_toggle_rx = pAnInfo->RxConfig.bits.D11;
 342             pAnInfo->mr_np_rx = pAnInfo->RxConfig.D15_NP;
 343             pAnInfo->mr_page_rx = AN_TRUE;
 344
 345             pAnInfo->State = AN_STATE_COMPLETE_ACK;
 346             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 347
 348             break;
 349
 350         case AN_STATE_COMPLETE_ACK:
 351             if(pAnInfo->AbilityMatch == AN_TRUE &&
 352                 pAnInfo->RxConfig.AsUSHORT == 0)
 353             {
 354                 pAnInfo->State = AN_STATE_AN_ENABLE;
 355                 break;
 356             }
 357
 358             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 359
 360             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 361             {
 362                 if(pAnInfo->mr_adv_next_page == 0 ||
 363                     pAnInfo->mr_lp_adv_next_page == 0)
 364                 {
 365                     pAnInfo->State = AN_STATE_IDLE_DETECT_INIT;
 366                 }
 367                 else
 368                 {
 369                     if(pAnInfo->TxConfig.bits.D15 == 0 &&
 370                         pAnInfo->mr_np_rx == 0)
 371                     {
 372                         pAnInfo->State = AN_STATE_IDLE_DETECT_INIT;
 373                     }
 374                     else
 375                     {
 376                         AnRet = AUTONEG_STATUS_FAILED;
 377                     }
 378                 }
 379             }
 380
 381             break;
 382
 383         case AN_STATE_IDLE_DETECT_INIT:
 384             pAnInfo->LinkTime_us = pAnInfo->CurrentTime_us;
 385
 386             MM_AnTxIdle(pAnInfo);
 387
 388             pAnInfo->State = AN_STATE_IDLE_DETECT;
 389
 390             AnRet = AUTONEG_STATUS_TIMER_ENABLED;
 391
 392             break;
 393
 394         case AN_STATE_IDLE_DETECT:
 395             if(pAnInfo->AbilityMatch == AN_TRUE &&
 396                 pAnInfo->RxConfig.AsUSHORT == 0)
 397             {
 398                 pAnInfo->State = AN_STATE_AN_ENABLE;
 399                 break;
 400             }
 401
 402             Delta_us = pAnInfo->CurrentTime_us - pAnInfo->LinkTime_us;
 403             if(Delta_us > AN_LINK_TIMER_INTERVAL_US)
 404             {
 405 #if 0
 406 /*                if(pAnInfo->IdleMatch == AN_TRUE) */
 407 /*                { */
 408 #endif
 409                     pAnInfo->State = AN_STATE_LINK_OK;
 410 #if 0
 411 /*                } */
 412 /*                else */
 413 /*                { */
 414 /*                    AnRet = AUTONEG_STATUS_FAILED; */
 415 /*                    break; */
 416 /*                } */
 417 #endif
 418             }
 419
 420             break;
 421
 422         case AN_STATE_LINK_OK:
 423             pAnInfo->mr_an_complete = AN_TRUE;
 424             pAnInfo->mr_link_ok = AN_TRUE;
 425             AnRet = AUTONEG_STATUS_DONE;
 426
 427             break;
 428
 429         case AN_STATE_NEXT_PAGE_WAIT_INIT:
 430             break;
 431
 432         case AN_STATE_NEXT_PAGE_WAIT:
 433             break;
 434
 435         default:
 436             AnRet = AUTONEG_STATUS_FAILED;
 437             break;
 438     }
 439
 440     return AnRet;
 441 }
 442 #endif /* INCLUDE_TBI_SUPPORT */
 443
 444 #endif /* !defined(CONFIG_NET_MULTI) */