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* ============================================================================
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* MAC Throughput Optimization for W89C33 802.11g WLAN STA.
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* The following MIB attributes or internal variables will be affected
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* while the MTO is being executed:
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* dot11FragmentationThreshold,
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* transmission rate and PLCP preamble type,
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* Copyright (c) 2003 Winbond Electronics Corp. All rights reserved.
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* ============================================================================
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#include "wb35reg_f.h"
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/* Declare SQ3 to rate and fragmentation threshold table */
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/* Declare fragmentation thresholds table */
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#define MTO_MAX_FRAG_TH_LEVELS 5
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#define MTO_MAX_DATA_RATE_LEVELS 12
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u16 MTO_Frag_Th_Tbl[MTO_MAX_FRAG_TH_LEVELS] = {
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256, 384, 512, 768, 1536
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* Declare data rate table:
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* The following table will be changed at anytime if the opration rate
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* supported by AP don't match the table
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static u8 MTO_Data_Rate_Tbl[MTO_MAX_DATA_RATE_LEVELS] = {
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2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108
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/* this record the retry rate at different data rate */
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static int retryrate_rec[MTO_MAX_DATA_RATE_LEVELS];
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static u8 boSparseTxTraffic;
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void MTO_Init(struct wbsoft_priv *adapter);
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void TxRateReductionCtrl(struct wbsoft_priv *adapter);
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void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 t0, u8 index);
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void MTO_TxFailed(struct wbsoft_priv *adapter);
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void hal_get_dto_para(struct wbsoft_priv *adapter, char *buffer);
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* ===========================================================================
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* Initialize MTO parameters.
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* This function should be invoked during system initialization.
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* adapter - The pointer to the Miniport adapter Context
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* ===========================================================================
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void MTO_Init(struct wbsoft_priv *adapter)
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MTO_PREAMBLE_TYPE() = MTO_PREAMBLE_SHORT; /* for test */
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MTO_AGING_TIMEOUT() = 0;
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/* The following parameters should be initialized to the values set by user */
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MTO_FRAG_TH_LEVEL() = 4;
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MTO_RTS_THRESHOLD() = MTO_FRAG_TH() + 1;
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MTO_RTS_THRESHOLD_SETUP() = MTO_FRAG_TH() + 1;
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MTO_RATE_CHANGE_ENABLE() = 1;
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MTO_FRAG_CHANGE_ENABLE() = 0;
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MTO_POWER_CHANGE_ENABLE() = 1;
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MTO_PREAMBLE_CHANGE_ENABLE() = 1;
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MTO_RTS_CHANGE_ENABLE() = 0;
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for (i = 0; i < MTO_MAX_DATA_RATE_LEVELS; i++)
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MTO_TXFLOWCOUNT() = 0;
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/* --------- DTO threshold parameters ------------- */
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MTOPARA_PERIODIC_CHECK_CYCLE() = 10;
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MTOPARA_RSSI_TH_FOR_ANTDIV() = 10;
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MTOPARA_TXCOUNT_TH_FOR_CALC_RATE() = 50;
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MTOPARA_TXRATE_INC_TH() = 10;
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MTOPARA_TXRATE_DEC_TH() = 30;
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MTOPARA_TXRATE_EQ_TH() = 40;
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MTOPARA_TXRATE_BACKOFF() = 12;
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MTOPARA_TXRETRYRATE_REDUCE() = 6;
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if (MTO_TXPOWER_FROM_EEPROM == 0xff) {
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switch (MTO_HAL()->phy_type) {
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case RF_AIROHA_2230S:
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MTOPARA_TXPOWER_INDEX() = 46; /* MAX-8 @@ Only for AL 2230 */
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MTOPARA_TXPOWER_INDEX() = 49;
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MTOPARA_TXPOWER_INDEX() = 10;
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MTOPARA_TXPOWER_INDEX() = 24;
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} else { /* follow the setting from EEPROM */
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MTOPARA_TXPOWER_INDEX() = MTO_TXPOWER_FROM_EEPROM;
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RFSynthesizer_SetPowerIndex(MTO_HAL(), (u8) MTOPARA_TXPOWER_INDEX());
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/* ------------------------------------------------ */
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/* For RSSI turning -- Cancel load from EEPROM */
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MTO_DATA().RSSI_high = -41;
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MTO_DATA().RSSI_low = -60;
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/* ===========================================================================
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* If we enable DTO, we will ignore the tx count with different tx rate
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* from DTO rate. This is because when we adjust DTO tx rate, there could
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* be some packets in the tx queue with previous tx rate
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void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 tx_rate, u8 index)
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if ((MTO_ENABLE == 1) && (MTO_RATE_CHANGE_ENABLE() == 1)) {
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if (tx_rate == MTO_DATA_RATE()) {
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if (boSparseTxTraffic)
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MTO_HAL()->dto_tx_frag_count += MTOPARA_PERIODIC_CHECK_CYCLE();
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MTO_HAL()->dto_tx_frag_count += 1;
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MTO_HAL()->dto_tx_retry_count += index;
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MTO_HAL()->dto_tx_frag_count += (index + 1);
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MTO_HAL()->dto_tx_retry_count += 7;
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MTO_HAL()->dto_tx_frag_count += 7;
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} else if (MTO_DATA_RATE() > 48 && tx_rate == 48) {
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/* for reducing data rate scheme, do not calculate different data rate. 3 is the reducing data rate at retry. */
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MTO_HAL()->dto_tx_retry_count += index;
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MTO_HAL()->dto_tx_frag_count += (index + 1);
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MTO_HAL()->dto_tx_retry_count += 3;
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MTO_HAL()->dto_tx_frag_count += 3;
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MTO_HAL()->dto_tx_retry_count += index;
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MTO_HAL()->dto_tx_frag_count += (index + 1);