mirror of
https://github.com/YikeStone/MT7601u.git
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326 lines
10 KiB
C
326 lines
10 KiB
C
/*
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***************************************************************************
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* Ralink Tech Inc.
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* 4F, No. 2 Technology 5th Rd.
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* Science-based Industrial Park
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* Hsin-chu, Taiwan, R.O.C.
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*
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* (c) Copyright 2002-2004, Ralink Technology, Inc.
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*
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* All rights reserved. Ralink's source code is an unpublished work and the
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* use of a copyright notice does not imply otherwise. This source code
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* contains confidential trade secret material of Ralink Tech. Any attemp
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* or participation in deciphering, decoding, reverse engineering or in any
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* way altering the source code is stricitly prohibited, unless the prior
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* written consent of Ralink Technology, Inc. is obtained.
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***************************************************************************
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Module Name:
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frq_cal.c
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Abstract:
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Revision History:
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Who When What
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-------- ---------- ----------------------------------------------
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*/
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#ifdef RTMP_FREQ_CALIBRATION_SUPPORT
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#include "rt_config.h"
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/*
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Sometimes frequency will be shift we need to adjust it when
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the frequencey shift.
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*/
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VOID InitFrequencyCalibrationMode(
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PRTMP_ADAPTER pAd,
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UINT8 Mode)
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{
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BBP_R179_STRUC BbpR179 = {{0}};
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BBP_R180_STRUC BbpR180 = {{0}};
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BBP_R182_STRUC BbpR182 = {{0}};
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// TODO: shiang-6590, fix me, I don't know which MODE0 yet for RT85592
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if (Mode == FREQ_CAL_INIT_MODE0)
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{
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/* Initialize the RX_END_STATUS (1, 5) for "Rx OFDM/CCK frequency offset report"*/
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BbpR179.field.DataIndex1 = 1;
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R179, BbpR179.byte);
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BbpR180.field.DataIndex2 = 5;
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R180, BbpR180.byte);
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BbpR182.field.DataArray = BBP_R57; /* Rx OFDM/CCK frequency offset report*/
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R182, BbpR182.byte);
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}
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else if (Mode == FREQ_CAL_INIT_MODE1)
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{
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/* Initialize the RX_END_STATUS (1, 3) for "Rx OFDM/CCK frequency offset report"*/
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BbpR179.field.DataIndex1 = 1;
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R179, BbpR179.byte);
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BbpR180.field.DataIndex2 = 3;
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R180, BbpR180.byte);
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BbpR182.field.DataArray = BBP_R57; /* Rx OFDM/CCK frequency offset report*/
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R182, BbpR182.byte);
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}
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else if (Mode == FREQ_CAL_INIT_MODE2)
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{
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/* Initialize the RX_END_STATUS (1) for "Rx OFDM/CCK frequency offset report"*/
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R142, 1);
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RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R143, BBP_R57); /* Rx OFDM/CCK frequency offset report*/
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}
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else
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DBGPRINT(RT_DEBUG_ERROR, ("%s:Unknow mode = %d\n", __FUNCTION__, Mode));
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}
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/* Initialize the frequency calibration*/
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VOID InitFrequencyCalibration(
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IN PRTMP_ADAPTER pAd)
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{
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if (pAd->FreqCalibrationCtrl.bEnableFrequencyCalibration == TRUE)
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{
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DBGPRINT(RT_DEBUG_ERROR, ("---> %s\n", __FUNCTION__));
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InitFrequencyCalibrationMode(pAd, pAd->chipCap.FreqCalInitMode);
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StopFrequencyCalibration(pAd);
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DBGPRINT(RT_DEBUG_ERROR, ("%s: frequency offset in the EEPROM = %ld(0x%x)\n",
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__FUNCTION__,
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pAd->RfFreqOffset, pAd->RfFreqOffset));
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DBGPRINT(RT_DEBUG_ERROR, ("<--- %s\n", __FUNCTION__));
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}
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}
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/* To stop the frequency calibration algorithm*/
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VOID StopFrequencyCalibration(
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IN PRTMP_ADAPTER pAd)
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{
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if (pAd->FreqCalibrationCtrl.bEnableFrequencyCalibration == TRUE)
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{
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DBGPRINT(RT_DEBUG_TRACE, ("---> %s\n", __FUNCTION__));
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/* Base on the frequency offset of the EEPROM*/
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#ifdef MT7601
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if ( IS_MT7601(pAd) )
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pAd->FreqCalibrationCtrl.AdaptiveFreqOffset = pAd->RfFreqOffset; /* AdaptiveFreqOffset= RF_R12[7:0] */
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else
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#endif /* MT7601 */
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pAd->FreqCalibrationCtrl.AdaptiveFreqOffset = (0x7F & ((CHAR)(pAd->RfFreqOffset))); /* C1 value control - Crystal calibration*/
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pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon = INVALID_FREQUENCY_OFFSET;
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pAd->FreqCalibrationCtrl.bSkipFirstFrequencyCalibration = TRUE;
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DBGPRINT(RT_DEBUG_TRACE, ("%s: pAd->FreqCalibrationCtrl.AdaptiveFreqOffset = 0x%X\n",
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__FUNCTION__,
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pAd->FreqCalibrationCtrl.AdaptiveFreqOffset));
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DBGPRINT(RT_DEBUG_TRACE, ("<--- %s\n", __FUNCTION__));
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}
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}
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VOID FrequencyCalibrationMode(
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PRTMP_ADAPTER pAd,
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UINT8 Mode)
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{
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UCHAR RFValue = 0;
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UINT32 PreRFValue = 0;
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#ifdef MT7601
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if (Mode == FREQ_CAL_MODE2)
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{
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rlt_rf_write(pAd, RF_BANK0, RF_R12, pAd->FreqCalibrationCtrl.AdaptiveFreqOffset);
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rlt_rf_write(pAd, RF_BANK0, RF_R04, 0x0A);
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rlt_rf_write(pAd, RF_BANK0, RF_R05, 0x20);
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rlt_rf_read(pAd, RF_BANK0, RF_R04, &RFValue);
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RFValue = ((RFValue & ~0x80) | 0x80); /* vcocal_en (initiate VCO calibration (reset after completion)) - It should be at the end of RF configuration. */
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rlt_rf_write(pAd, RF_BANK0, RF_R04, RFValue);
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RTMPusecDelay(2000);
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}
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else
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#endif /* MT7601 */
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DBGPRINT(RT_DEBUG_ERROR, ("Unknown FrqCalibration Mode\n"));
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}
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/* The frequency calibration algorithm*/
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VOID FrequencyCalibration(
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IN PRTMP_ADAPTER pAd)
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{
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/*BOOLEAN bUpdateRFR = FALSE;*/
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CHAR HighFreqTriggerPoint = 0, LowFreqTriggerPoint = 0;
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CHAR DecreaseFreqOffset = 0, IncreaseFreqOffset = 0;
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/* Frequency calibration period: */
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/* a) 10 seconds: Check the reported frequency offset*/
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/* b) 500 ms: Update the RF frequency if possible*/
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if ((pAd->FreqCalibrationCtrl.bEnableFrequencyCalibration == TRUE) &&
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(((pAd->FreqCalibrationCtrl.bApproachFrequency == FALSE) && ((pAd->Mlme.PeriodicRound % FREQUENCY_CALIBRATION_PERIOD) == 0)) ||
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((pAd->FreqCalibrationCtrl.bApproachFrequency == TRUE) && ((pAd->Mlme.PeriodicRound % (FREQUENCY_CALIBRATION_PERIOD / 20)) == 0))))
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{
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DBGPRINT(RT_DEBUG_INFO, ("---> %s\n", __FUNCTION__));
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if (pAd->FreqCalibrationCtrl.bSkipFirstFrequencyCalibration == TRUE)
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{
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pAd->FreqCalibrationCtrl.bSkipFirstFrequencyCalibration = FALSE;
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DBGPRINT(RT_DEBUG_INFO, ("%s: Skip cuurent frequency calibration (avoid calibrating frequency at the time the STA is just link-up)\n", __FUNCTION__));
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}
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else
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{
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if (pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon != INVALID_FREQUENCY_OFFSET)
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{
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/* Sync the thresholds*/
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if (pAd->FreqCalibrationCtrl.BeaconPhyMode == MODE_CCK) /* CCK*/
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{
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#ifdef MT7601
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if ( IS_MT7601(pAd) )
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{
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HighFreqTriggerPoint = MT7601_HIGH_FREQUENCY_TRIGGER_POINT_CCK;
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LowFreqTriggerPoint = MT7601_LOW_FREQUENCY_TRIGGER_POINT_CCK;
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DecreaseFreqOffset = MT7601_DECREASE_FREQUENCY_OFFSET_CCK;
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IncreaseFreqOffset = MT7601_INCREASE_FREQUENCY_OFFSET_CCK;
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}
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else
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#endif /* MT7601 */
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{
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HighFreqTriggerPoint = HIGH_FREQUENCY_TRIGGER_POINT_CCK;
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LowFreqTriggerPoint = LOW_FREQUENCY_TRIGGER_POINT_CCK;
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DecreaseFreqOffset = DECREASE_FREQUENCY_OFFSET_CCK;
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IncreaseFreqOffset = INCREASE_FREQUENCY_OFFSET_CCK;
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}
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}
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else /* OFDM*/
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{
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#ifdef MT7601
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if ( IS_MT7601(pAd) )
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{
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DBGPRINT(RT_DEBUG_ERROR, ("%s:MT7601 receive OFDM beacon.\n", __FUNCTION__));
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HighFreqTriggerPoint = MT7601_HIGH_FREQUENCY_TRIGGER_POINT_OFDM20;
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LowFreqTriggerPoint = MT7601_LOW_FREQUENCY_TRIGGER_POINT_OFDM20;
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DecreaseFreqOffset = MT7601_DECREASE_FREQUENCY_OFFSET_OFDM20;
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IncreaseFreqOffset = MT7601_INCREASE_FREQUENCY_OFFSET_OFDM20;
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}
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else
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#endif /* MT7601 */
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{
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HighFreqTriggerPoint = HIGH_FREQUENCY_TRIGGER_POINT_OFDM;
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LowFreqTriggerPoint = LOW_FREQUENCY_TRIGGER_POINT_OFDM;
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DecreaseFreqOffset = DECREASE_FREQUENCY_OFFSET_OFDM;
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IncreaseFreqOffset = INCREASE_FREQUENCY_OFFSET_OFDM;
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}
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}
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if ((pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon >= HighFreqTriggerPoint) ||
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(pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon <= LowFreqTriggerPoint))
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{
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pAd->FreqCalibrationCtrl.bApproachFrequency = TRUE;
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}
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if (pAd->FreqCalibrationCtrl.bApproachFrequency == TRUE)
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{
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if ((pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon <= DecreaseFreqOffset) &&
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(pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon >= IncreaseFreqOffset))
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{
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pAd->FreqCalibrationCtrl.bApproachFrequency = FALSE; /* Stop approaching frquency if -10 < reported frequency offset < 10*/
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}
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else if (pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon > DecreaseFreqOffset)
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{
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#ifdef MT7601
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if(pAd->FreqCalibrationCtrl.AdaptiveFreqOffset > 0)
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#endif /* MT7601 */
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pAd->FreqCalibrationCtrl.AdaptiveFreqOffset--;
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DBGPRINT(RT_DEBUG_TRACE, ("%s: -- frequency offset = 0x%X\n", __FUNCTION__, pAd->FreqCalibrationCtrl.AdaptiveFreqOffset));
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FrequencyCalibrationMode(pAd, pAd->chipCap.FreqCalMode);
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}
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else if (pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon < IncreaseFreqOffset)
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{
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#ifdef MT7601
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if(pAd->FreqCalibrationCtrl.AdaptiveFreqOffset < 0xBF)
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#endif /* MT7601 */
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pAd->FreqCalibrationCtrl.AdaptiveFreqOffset++;
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DBGPRINT(RT_DEBUG_TRACE, ("%s: ++ frequency offset = 0x%X\n", __FUNCTION__, pAd->FreqCalibrationCtrl.AdaptiveFreqOffset));
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FrequencyCalibrationMode(pAd, pAd->chipCap.FreqCalMode);
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}
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}
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DBGPRINT(RT_DEBUG_INFO, ("%s: AdaptiveFreqOffset = %d, LatestFreqOffsetOverBeacon = %d, bApproachFrequency = %d\n",
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__FUNCTION__,
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pAd->FreqCalibrationCtrl.AdaptiveFreqOffset,
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pAd->FreqCalibrationCtrl.LatestFreqOffsetOverBeacon,
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pAd->FreqCalibrationCtrl.bApproachFrequency));
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}
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}
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DBGPRINT(RT_DEBUG_INFO, ("<--- %s\n", __FUNCTION__));
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}
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}
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inline CHAR GetFrequencyOffsetField(
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PRTMP_ADAPTER pAd,
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RXWI_STRUC *pRxWI,
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UINT8 RxWIFrqOffsetField)
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{
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CHAR FreqOffset = 0;
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if (RxWIFrqOffsetField == RXWI_FRQ_OFFSET_FIELD0)
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{
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FreqOffset = (CHAR)(pRxWI->RxWISNR1);
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}
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else if (RxWIFrqOffsetField == RXWI_FRQ_OFFSET_FIELD1)
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{
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FreqOffset = (CHAR)(pRxWI->RxWIFOFFSET);
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}
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else
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DBGPRINT(RT_DEBUG_ERROR, ("%s:Unknow Frequency Offset location(%d)\n", __FUNCTION__, RxWIFrqOffsetField));
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return FreqOffset;
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}
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/* Get the frequency offset*/
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CHAR GetFrequencyOffset(
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IN PRTMP_ADAPTER pAd,
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IN RXWI_STRUC *pRxWI)
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{
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CHAR FreqOffset = 0;
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if (pAd->FreqCalibrationCtrl.bEnableFrequencyCalibration)
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{
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DBGPRINT(RT_DEBUG_INFO, ("---> %s\n", __FUNCTION__));
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FreqOffset = GetFrequencyOffsetField(pAd, pRxWI, pAd->chipCap.RxWIFrqOffset);
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if ((FreqOffset < LOWERBOUND_OF_FREQUENCY_OFFSET) ||
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(FreqOffset > UPPERBOUND_OF_FREQUENCY_OFFSET))
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{
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FreqOffset = INVALID_FREQUENCY_OFFSET;
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DBGPRINT(RT_DEBUG_ERROR, ("%s: (out-of-range) FreqOffset = %d\n",
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__FUNCTION__,
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FreqOffset));
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}
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DBGPRINT(RT_DEBUG_INFO, ("%s: FreqOffset = %d(0x%x)\n",
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__FUNCTION__,
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FreqOffset, FreqOffset));
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DBGPRINT(RT_DEBUG_INFO, ("<--- %s\n", __FUNCTION__));
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}
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return FreqOffset;
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}
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#endif /* RTMP_FREQ_CALIBRATION_SUPPORT */
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