drivers/staging/rt2860/common/dfs.c

   1 /*
   2  *************************************************************************
   3  * Ralink Tech Inc.
   4  * 5F., No.36, Taiyuan St., Jhubei City,
   5  * Hsinchu County 302,
   6  * Taiwan, R.O.C.
   7  *
   8  * (c) Copyright 2002-2007, Ralink Technology, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify  *
  11  * it under the terms of the GNU General Public License as published by  *
  12  * the Free Software Foundation; either version 2 of the License, or     *
  13  * (at your option) any later version.                                   *
  14  *                                                                       *
  15  * This program is distributed in the hope that it will be useful,       *
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  18  * GNU General Public License for more details.                          *
  19  *                                                                       *
  20  * You should have received a copy of the GNU General Public License     *
  21  * along with this program; if not, write to the                         *
  22  * Free Software Foundation, Inc.,                                       *
  23  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  24  *                                                                       *
  25  *************************************************************************
  26
  27     Module Name:
  28     ap_dfs.c
  29
  30     Abstract:
  31     Support DFS function.
  32
  33     Revision History:
  34     Who       When            What
  35     --------  ----------      ----------------------------------------------
  36     Fonchi    03-12-2007      created
  37 */
  38
  39 #include "../rt_config.h"
  40
  41 typedef struct _RADAR_DURATION_TABLE
  42 {
  43         ULONG RDDurRegion;
  44         ULONG RadarSignalDuration;
  45         ULONG Tolerance;
  46 } RADAR_DURATION_TABLE, *PRADAR_DURATION_TABLE;
  47
  48
  49 static UCHAR RdIdleTimeTable[MAX_RD_REGION][4] =
  50 {
  51         {9, 250, 250, 250},             // CE
  52         {4, 250, 250, 250},             // FCC
  53         {4, 250, 250, 250},             // JAP
  54         {15, 250, 250, 250},    // JAP_W53
  55         {4, 250, 250, 250}              // JAP_W56
  56 };
  57
  58 /*
  59         ========================================================================
  60
  61         Routine Description:
  62                 Bbp Radar detection routine
  63
  64         Arguments:
  65                 pAd     Pointer to our adapter
  66
  67         Return Value:
  68
  69         ========================================================================
  70 */
  71 VOID BbpRadarDetectionStart(
  72         IN PRTMP_ADAPTER pAd)
  73 {
  74         UINT8 RadarPeriod;
  75
  76         RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 114, 0x02);
  77         RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 121, 0x20);
  78         RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 122, 0x00);
  79         RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 123, 0x08/*0x80*/);
  80         RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 124, 0x28);
  81         RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 125, 0xff);
  82
  83         RadarPeriod = ((UINT)RdIdleTimeTable[pAd->CommonCfg.RadarDetect.RDDurRegion][0] + (UINT)pAd->CommonCfg.RadarDetect.DfsSessionTime) < 250 ?
  84                         (RdIdleTimeTable[pAd->CommonCfg.RadarDetect.RDDurRegion][0] + pAd->CommonCfg.RadarDetect.DfsSessionTime) : 250;
  85
  86         RTMP_IO_WRITE8(pAd, 0x7020, 0x1d);
  87         RTMP_IO_WRITE8(pAd, 0x7021, 0x40);
  88
  89         RadarDetectionStart(pAd, 0, RadarPeriod);
  90         return;
  91 }
  92
  93 /*
  94         ========================================================================
  95
  96         Routine Description:
  97                 Bbp Radar detection routine
  98
  99         Arguments:
 100                 pAd     Pointer to our adapter
 101
 102         Return Value:
 103
 104         ========================================================================
 105 */
 106 VOID BbpRadarDetectionStop(
 107         IN PRTMP_ADAPTER pAd)
 108 {
 109         RTMP_IO_WRITE8(pAd, 0x7020, 0x1d);
 110         RTMP_IO_WRITE8(pAd, 0x7021, 0x60);
 111
 112         RadarDetectionStop(pAd);
 113         return;
 114 }
 115
 116 /*
 117         ========================================================================
 118
 119         Routine Description:
 120                 Radar detection routine
 121
 122         Arguments:
 123                 pAd     Pointer to our adapter
 124
 125         Return Value:
 126
 127         ========================================================================
 128 */
 129 VOID RadarDetectionStart(
 130         IN PRTMP_ADAPTER pAd,
 131         IN BOOLEAN CTSProtect,
 132         IN UINT8 CTSPeriod)
 133 {
 134         UINT8 DfsActiveTime = (pAd->CommonCfg.RadarDetect.DfsSessionTime & 0x1f);
 135         UINT8 CtsProtect = (CTSProtect == 1) ? 0x02 : 0x01; // CTS protect.
 136
 137         if (CTSProtect != 0)
 138         {
 139                 switch(pAd->CommonCfg.RadarDetect.RDDurRegion)
 140                 {
 141                 case FCC:
 142                 case JAP_W56:
 143                         CtsProtect = 0x03;
 144                         break;
 145
 146                 case CE:
 147                 case JAP_W53:
 148                 default:
 149                         CtsProtect = 0x02;
 150                         break;
 151                 }
 152         }
 153         else
 154                 CtsProtect = 0x01;
 155
 156
 157         // send start-RD with CTS protection command to MCU
 158         // highbyte [7]         reserve
 159         // highbyte [6:5]       0x: stop Carrier/Radar detection
 160         // highbyte [10]:       Start Carrier/Radar detection without CTS protection, 11: Start Carrier/Radar detection with CTS protection
 161         // highbyte [4:0]       Radar/carrier detection duration. In 1ms.
 162
 163         // lowbyte [7:0]        Radar/carrier detection period, in 1ms.
 164         AsicSendCommandToMcu(pAd, 0x60, 0xff, CTSPeriod, DfsActiveTime | (CtsProtect << 5));
 165         //AsicSendCommandToMcu(pAd, 0x63, 0xff, 10, 0);
 166
 167         return;
 168 }
 169
 170 /*
 171         ========================================================================
 172
 173         Routine Description:
 174                 Radar detection routine
 175
 176         Arguments:
 177                 pAd     Pointer to our adapter
 178
 179         Return Value:
 180                 TRUE    Found radar signal
 181                 FALSE   Not found radar signal
 182
 183         ========================================================================
 184 */
 185 VOID RadarDetectionStop(
 186         IN PRTMP_ADAPTER        pAd)
 187 {
 188         DBGPRINT(RT_DEBUG_TRACE,("RadarDetectionStop.\n"));
 189         AsicSendCommandToMcu(pAd, 0x60, 0xff, 0x00, 0x00);      // send start-RD with CTS protection command to MCU
 190
 191         return;
 192 }
 193
 194 /*
 195         ========================================================================
 196
 197         Routine Description:
 198                 Radar channel check routine
 199
 200         Arguments:
 201                 pAd     Pointer to our adapter
 202
 203         Return Value:
 204                 TRUE    need to do radar detect
 205                 FALSE   need not to do radar detect
 206
 207         ========================================================================
 208 */
 209 BOOLEAN RadarChannelCheck(
 210         IN PRTMP_ADAPTER        pAd,
 211         IN UCHAR                        Ch)
 212 {
 213 #if 1
 214         INT             i;
 215         BOOLEAN result = FALSE;
 216
 217         for (i=0; i<pAd->ChannelListNum; i++)
 218         {
 219                 if (Ch == pAd->ChannelList[i].Channel)
 220                 {
 221                         result = pAd->ChannelList[i].DfsReq;
 222                         break;
 223                 }
 224         }
 225
 226         return result;
 227 #else
 228         INT             i;
 229         UCHAR   Channel[15]={52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140};
 230
 231         for (i=0; i<15; i++)
 232         {
 233                 if (Ch == Channel[i])
 234                 {
 235                         break;
 236                 }
 237         }
 238
 239         if (i != 15)
 240                 return TRUE;
 241         else
 242                 return FALSE;
 243 #endif
 244 }
 245
 246 ULONG JapRadarType(
 247         IN PRTMP_ADAPTER pAd)
 248 {
 249         ULONG           i;
 250         const UCHAR     Channel[15]={52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140};
 251
 252         if (pAd->CommonCfg.RadarDetect.RDDurRegion != JAP)
 253         {
 254                 return pAd->CommonCfg.RadarDetect.RDDurRegion;
 255         }
 256
 257         for (i=0; i<15; i++)
 258         {
 259                 if (pAd->CommonCfg.Channel == Channel[i])
 260                 {
 261                         break;
 262                 }
 263         }
 264
 265         if (i < 4)
 266                 return JAP_W53;
 267         else if (i < 15)
 268                 return JAP_W56;
 269         else
 270                 return JAP; // W52
 271
 272 }
 273
 274 ULONG RTMPBbpReadRadarDuration(
 275         IN PRTMP_ADAPTER        pAd)
 276 {
 277         UINT8 byteValue = 0;
 278         ULONG result;
 279
 280         BBP_IO_READ8_BY_REG_ID(pAd, BBP_R115, &byteValue);
 281
 282         result = 0;
 283         switch (byteValue)
 284         {
 285         case 1: // radar signal detected by pulse mode.
 286         case 2: // radar signal detected by width mode.
 287                 result = RTMPReadRadarDuration(pAd);
 288                 break;
 289
 290         case 0: // No radar signal.
 291         default:
 292
 293                 result = 0;
 294                 break;
 295         }
 296
 297         return result;
 298 }
 299
 300 ULONG RTMPReadRadarDuration(
 301         IN PRTMP_ADAPTER        pAd)
 302 {
 303         ULONG result = 0;
 304
 305         return result;
 306
 307 }
 308
 309 VOID RTMPCleanRadarDuration(
 310         IN PRTMP_ADAPTER        pAd)
 311 {
 312         return;
 313 }
 314
 315 /*
 316     ========================================================================
 317     Routine Description:
 318         Radar wave detection. The API should be invoke each second.
 319
 320     Arguments:
 321         pAd         - Adapter pointer
 322
 323     Return Value:
 324         None
 325
 326     ========================================================================
 327 */
 328 VOID ApRadarDetectPeriodic(
 329         IN PRTMP_ADAPTER pAd)
 330 {
 331         INT     i;
 332
 333         pAd->CommonCfg.RadarDetect.InServiceMonitorCount++;
 334
 335         for (i=0; i<pAd->ChannelListNum; i++)
 336         {
 337                 if (pAd->ChannelList[i].RemainingTimeForUse > 0)
 338                 {
 339                         pAd->ChannelList[i].RemainingTimeForUse --;
 340                         if ((pAd->Mlme.PeriodicRound%5) == 0)
 341                         {
 342                                 DBGPRINT(RT_DEBUG_TRACE, ("RadarDetectPeriodic - ch=%d, RemainingTimeForUse=%d\n", pAd->ChannelList[i].Channel, pAd->ChannelList[i].RemainingTimeForUse));
 343                         }
 344                 }
 345         }
 346
 347         //radar detect
 348         if ((pAd->CommonCfg.Channel > 14)
 349                 && (pAd->CommonCfg.bIEEE80211H == 1)
 350                 && RadarChannelCheck(pAd, pAd->CommonCfg.Channel))
 351         {
 352                 RadarDetectPeriodic(pAd);
 353         }
 354
 355         return;
 356 }
 357
 358 // Periodic Radar detection, switch channel will occur in RTMPHandleTBTTInterrupt()
 359 // Before switch channel, driver needs doing channel switch announcement.
 360 VOID RadarDetectPeriodic(
 361         IN PRTMP_ADAPTER        pAd)
 362 {
 363         // need to check channel availability, after switch channel
 364         if (pAd->CommonCfg.RadarDetect.RDMode != RD_SILENCE_MODE)
 365                         return;
 366
 367         // channel availability check time is 60sec, use 65 for assurance
 368         if (pAd->CommonCfg.RadarDetect.RDCount++ > pAd->CommonCfg.RadarDetect.ChMovingTime)
 369         {
 370                 DBGPRINT(RT_DEBUG_TRACE, ("Not found radar signal, start send beacon and radar detection in service monitor\n\n"));
 371                         BbpRadarDetectionStop(pAd);
 372                 AsicEnableBssSync(pAd);
 373                 pAd->CommonCfg.RadarDetect.RDMode = RD_NORMAL_MODE;
 374
 375
 376                 return;
 377         }
 378
 379         return;
 380 }
 381
 382
 383 /*
 384     ==========================================================================
 385     Description:
 386                 change channel moving time for DFS testing.
 387
 388         Arguments:
 389             pAdapter                    Pointer to our adapter
 390             wrq                         Pointer to the ioctl argument
 391
 392     Return Value:
 393         None
 394
 395     Note:
 396         Usage:
 397                1.) iwpriv ra0 set ChMovTime=[value]
 398     ==========================================================================
 399 */
 400 INT Set_ChMovingTime_Proc(
 401         IN PRTMP_ADAPTER pAd,
 402         IN PUCHAR arg)
 403 {
 404         UINT8 Value;
 405
 406         Value = simple_strtol(arg, 0, 10);
 407
 408         pAd->CommonCfg.RadarDetect.ChMovingTime = Value;
 409
 410         DBGPRINT(RT_DEBUG_TRACE, ("%s:: %d\n", __func__,
 411                 pAd->CommonCfg.RadarDetect.ChMovingTime));
 412
 413         return TRUE;
 414 }
 415
 416 INT Set_LongPulseRadarTh_Proc(
 417         IN PRTMP_ADAPTER pAd,
 418         IN PUCHAR arg)
 419 {
 420         UINT8 Value;
 421
 422         Value = simple_strtol(arg, 0, 10) > 10 ? 10 : simple_strtol(arg, 0, 10);
 423
 424         pAd->CommonCfg.RadarDetect.LongPulseRadarTh = Value;
 425
 426         DBGPRINT(RT_DEBUG_TRACE, ("%s:: %d\n", __func__,
 427                 pAd->CommonCfg.RadarDetect.LongPulseRadarTh));
 428
 429         return TRUE;
 430 }
 431
 432