staging: vt6655: remove antenna diversity functions

The vendor had disabled these functions in their last version.

On test this can be troublesome, so remove this from the driver along
with its macros and timers.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

5 files changed, 0 insertions, 442 deletions

diff --git a/drivers/staging/vt6655/baseband.c b/drivers/staging/vt6655/baseband.c
index ecf7dac..565ba18 100644
--- a/drivers/staging/vt6655/baseband.c
+++ b/drivers/staging/vt6655/baseband.c
@@ -1699,46 +1699,6 @@ static const unsigned short awcFrameTime[MAX_RATE] = {
 		10, 20, 55, 110, 24, 36, 48, 72, 96, 144, 192, 216
 };
 
-/*---------------------  Static Functions  --------------------------*/
-
-static
-unsigned long
-s_ulGetRatio(struct vnt_private *priv);
-
-static
-void
-s_vChangeAntenna(
-	struct vnt_private *priv
-);
-
-static
-void
-s_vChangeAntenna(
-	struct vnt_private *priv
-)
-{
-	if (priv->dwRxAntennaSel == 0) {
-		priv->dwRxAntennaSel = 1;
-		if (priv->bTxRxAntInv == true)
-			BBvSetRxAntennaMode(priv, ANT_A);
-		else
-			BBvSetRxAntennaMode(priv, ANT_B);
-	} else {
-		priv->dwRxAntennaSel = 0;
-		if (priv->bTxRxAntInv == true)
-			BBvSetRxAntennaMode(priv, ANT_B);
-		else
-			BBvSetRxAntennaMode(priv, ANT_A);
-	}
-	if (priv->dwTxAntennaSel == 0) {
-		priv->dwTxAntennaSel = 1;
-		BBvSetTxAntennaMode(priv, ANT_B);
-	} else {
-		priv->dwTxAntennaSel = 0;
-		BBvSetTxAntennaMode(priv, ANT_A);
-	}
-}
-
 /*---------------------  Export Variables  --------------------------*/
 /*
  * Description: Calculate data frame transmitting time
@@ -2413,303 +2373,3 @@ BBvExitDeepSleep(struct vnt_private *priv, unsigned char byLocalID)
 	BBbWriteEmbedded(priv, 0x0C, 0x00); /* CR12 */
 	BBbWriteEmbedded(priv, 0x0D, 0x01); /* CR13 */
 }
-
-static
-unsigned long
-s_ulGetRatio(struct vnt_private *priv)
-{
-	unsigned long ulRatio = 0;
-	unsigned long ulMaxPacket;
-	unsigned long ulPacketNum;
-
-	/* This is a thousand-ratio */
-	ulMaxPacket = priv->uNumSQ3[RATE_54M];
-	if (priv->uNumSQ3[RATE_54M] != 0) {
-		ulPacketNum = priv->uNumSQ3[RATE_54M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_54M;
-	}
-	if (priv->uNumSQ3[RATE_48M] > ulMaxPacket) {
-		ulPacketNum = priv->uNumSQ3[RATE_54M] + priv->uNumSQ3[RATE_48M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_48M;
-		ulMaxPacket = priv->uNumSQ3[RATE_48M];
-	}
-	if (priv->uNumSQ3[RATE_36M] > ulMaxPacket) {
-		ulPacketNum = priv->uNumSQ3[RATE_54M] + priv->uNumSQ3[RATE_48M] +
-			priv->uNumSQ3[RATE_36M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_36M;
-		ulMaxPacket = priv->uNumSQ3[RATE_36M];
-	}
-	if (priv->uNumSQ3[RATE_24M] > ulMaxPacket) {
-		ulPacketNum = priv->uNumSQ3[RATE_54M] + priv->uNumSQ3[RATE_48M] +
-			priv->uNumSQ3[RATE_36M] + priv->uNumSQ3[RATE_24M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_24M;
-		ulMaxPacket = priv->uNumSQ3[RATE_24M];
-	}
-	if (priv->uNumSQ3[RATE_18M] > ulMaxPacket) {
-		ulPacketNum = priv->uNumSQ3[RATE_54M] + priv->uNumSQ3[RATE_48M] +
-			priv->uNumSQ3[RATE_36M] + priv->uNumSQ3[RATE_24M] +
-			priv->uNumSQ3[RATE_18M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_18M;
-		ulMaxPacket = priv->uNumSQ3[RATE_18M];
-	}
-	if (priv->uNumSQ3[RATE_12M] > ulMaxPacket) {
-		ulPacketNum = priv->uNumSQ3[RATE_54M] + priv->uNumSQ3[RATE_48M] +
-			priv->uNumSQ3[RATE_36M] + priv->uNumSQ3[RATE_24M] +
-			priv->uNumSQ3[RATE_18M] + priv->uNumSQ3[RATE_12M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_12M;
-		ulMaxPacket = priv->uNumSQ3[RATE_12M];
-	}
-	if (priv->uNumSQ3[RATE_11M] > ulMaxPacket) {
-		ulPacketNum = priv->uDiversityCnt - priv->uNumSQ3[RATE_1M] -
-			priv->uNumSQ3[RATE_2M] - priv->uNumSQ3[RATE_5M] -
-			priv->uNumSQ3[RATE_6M] - priv->uNumSQ3[RATE_9M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_11M;
-		ulMaxPacket = priv->uNumSQ3[RATE_11M];
-	}
-	if (priv->uNumSQ3[RATE_9M] > ulMaxPacket) {
-		ulPacketNum = priv->uDiversityCnt - priv->uNumSQ3[RATE_1M] -
-			priv->uNumSQ3[RATE_2M] - priv->uNumSQ3[RATE_5M] -
-			priv->uNumSQ3[RATE_6M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_9M;
-		ulMaxPacket = priv->uNumSQ3[RATE_9M];
-	}
-	if (priv->uNumSQ3[RATE_6M] > ulMaxPacket) {
-		ulPacketNum = priv->uDiversityCnt - priv->uNumSQ3[RATE_1M] -
-			priv->uNumSQ3[RATE_2M] - priv->uNumSQ3[RATE_5M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_6M;
-		ulMaxPacket = priv->uNumSQ3[RATE_6M];
-	}
-	if (priv->uNumSQ3[RATE_5M] > ulMaxPacket) {
-		ulPacketNum = priv->uDiversityCnt - priv->uNumSQ3[RATE_1M] -
-			priv->uNumSQ3[RATE_2M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_55M;
-		ulMaxPacket = priv->uNumSQ3[RATE_5M];
-	}
-	if (priv->uNumSQ3[RATE_2M] > ulMaxPacket) {
-		ulPacketNum = priv->uDiversityCnt - priv->uNumSQ3[RATE_1M];
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_2M;
-		ulMaxPacket = priv->uNumSQ3[RATE_2M];
-	}
-	if (priv->uNumSQ3[RATE_1M] > ulMaxPacket) {
-		ulPacketNum = priv->uDiversityCnt;
-		ulRatio = (ulPacketNum * 1000 / priv->uDiversityCnt);
-		ulRatio += TOP_RATE_1M;
-	}
-
-	return ulRatio;
-}
-
-void
-BBvClearAntDivSQ3Value(struct vnt_private *priv)
-{
-	unsigned int ii;
-
-	priv->uDiversityCnt = 0;
-	for (ii = 0; ii < MAX_RATE; ii++)
-		priv->uNumSQ3[ii] = 0;
-}
-
-/*
- * Description: Antenna Diversity
- *
- * Parameters:
- *  In:
- *      priv          - Device Structure
- *      byRSR            - RSR from received packet
- *      bySQ3            - SQ3 value from received packet
- *  Out:
- *      none
- *
- * Return Value: none
- *
- */
-
-void BBvAntennaDiversity(struct vnt_private *priv,
-			 unsigned char byRxRate, unsigned char bySQ3)
-{
-	if ((byRxRate >= MAX_RATE) || (priv->wAntDiversityMaxRate >= MAX_RATE))
-		return;
-
-	priv->uDiversityCnt++;
-
-	priv->uNumSQ3[byRxRate]++;
-
-	if (priv->byAntennaState == 0) {
-		if (priv->uDiversityCnt > priv->ulDiversityNValue) {
-			pr_debug("ulDiversityNValue=[%d],54M-[%d]\n",
-				 (int)priv->ulDiversityNValue,
-				 (int)priv->uNumSQ3[(int)priv->wAntDiversityMaxRate]);
-
-			if (priv->uNumSQ3[priv->wAntDiversityMaxRate] < priv->uDiversityCnt/2) {
-				priv->ulRatio_State0 = s_ulGetRatio(priv);
-				pr_debug("SQ3_State0, rate = [%08x]\n",
-					 (int)priv->ulRatio_State0);
-
-				if (priv->byTMax == 0)
-					return;
-				pr_debug("1.[%08x], uNumSQ3[%d]=%d, %d\n",
-					 (int)priv->ulRatio_State0,
-					 (int)priv->wAntDiversityMaxRate,
-					 (int)priv->uNumSQ3[(int)priv->wAntDiversityMaxRate],
-					 (int)priv->uDiversityCnt);
-
-				s_vChangeAntenna(priv);
-				priv->byAntennaState = 1;
-				del_timer(&priv->TimerSQ3Tmax3);
-				del_timer(&priv->TimerSQ3Tmax2);
-				priv->TimerSQ3Tmax1.expires =  RUN_AT(priv->byTMax * HZ);
-				add_timer(&priv->TimerSQ3Tmax1);
-
-			} else {
-				priv->TimerSQ3Tmax3.expires =  RUN_AT(priv->byTMax3 * HZ);
-				add_timer(&priv->TimerSQ3Tmax3);
-			}
-			BBvClearAntDivSQ3Value(priv);
-
-		}
-	} else { /* byAntennaState == 1 */
-
-		if (priv->uDiversityCnt > priv->ulDiversityMValue) {
-			del_timer(&priv->TimerSQ3Tmax1);
-
-			priv->ulRatio_State1 = s_ulGetRatio(priv);
-			pr_debug("RX:SQ3_State1, rate0 = %08x,rate1 = %08x\n",
-				 (int)priv->ulRatio_State0,
-				 (int)priv->ulRatio_State1);
-
-			if (priv->ulRatio_State1 < priv->ulRatio_State0) {
-				pr_debug("2.[%08x][%08x], uNumSQ3[%d]=%d, %d\n",
-					 (int)priv->ulRatio_State0,
-					 (int)priv->ulRatio_State1,
-					 (int)priv->wAntDiversityMaxRate,
-					 (int)priv->uNumSQ3[(int)priv->wAntDiversityMaxRate],
-					 (int)priv->uDiversityCnt);
-
-				s_vChangeAntenna(priv);
-				priv->TimerSQ3Tmax3.expires =  RUN_AT(priv->byTMax3 * HZ);
-				priv->TimerSQ3Tmax2.expires =  RUN_AT(priv->byTMax2 * HZ);
-				add_timer(&priv->TimerSQ3Tmax3);
-				add_timer(&priv->TimerSQ3Tmax2);
-			}
-			priv->byAntennaState = 0;
-			BBvClearAntDivSQ3Value(priv);
-		}
-	} /* byAntennaState */
-}
-
-/*+
- *
- * Description:
- *  Timer for SQ3 antenna diversity
- *
- * Parameters:
- *  In:
- *  Out:
- *      none
- *
- * Return Value: none
- *
- -*/
-
-void
-TimerSQ3CallBack(
-	unsigned long data
-)
-{
-	struct vnt_private *priv = (struct vnt_private *)data;
-	unsigned long flags;
-
-	pr_debug("TimerSQ3CallBack...\n");
-
-	spin_lock_irqsave(&priv->lock, flags);
-
-	pr_debug("3.[%08x][%08x], %d\n",
-		 (int)priv->ulRatio_State0, (int)priv->ulRatio_State1,
-		 (int)priv->uDiversityCnt);
-
-	s_vChangeAntenna(priv);
-	priv->byAntennaState = 0;
-	BBvClearAntDivSQ3Value(priv);
-
-	priv->TimerSQ3Tmax3.expires =  RUN_AT(priv->byTMax3 * HZ);
-	priv->TimerSQ3Tmax2.expires =  RUN_AT(priv->byTMax2 * HZ);
-	add_timer(&priv->TimerSQ3Tmax3);
-	add_timer(&priv->TimerSQ3Tmax2);
-
-	spin_unlock_irqrestore(&priv->lock, flags);
-}
-
-/*+
- *
- * Description:
- *  Timer for SQ3 antenna diversity
- *
- * Parameters:
- *  In:
- *      pvSysSpec1
- *      hDeviceContext - Pointer to the adapter
- *      pvSysSpec2
- *      pvSysSpec3
- *  Out:
- *      none
- *
- * Return Value: none
- *
- -*/
-
-void
-TimerState1CallBack(
-	unsigned long data
-)
-{
-	struct vnt_private *priv = (struct vnt_private *)data;
-	unsigned long flags;
-
-	pr_debug("TimerState1CallBack...\n");
-
-	spin_lock_irqsave(&priv->lock, flags);
-
-	if (priv->uDiversityCnt < priv->ulDiversityMValue/100) {
-		s_vChangeAntenna(priv);
-		priv->TimerSQ3Tmax3.expires =  RUN_AT(priv->byTMax3 * HZ);
-		priv->TimerSQ3Tmax2.expires =  RUN_AT(priv->byTMax2 * HZ);
-		add_timer(&priv->TimerSQ3Tmax3);
-		add_timer(&priv->TimerSQ3Tmax2);
-	} else {
-		priv->ulRatio_State1 = s_ulGetRatio(priv);
-		pr_debug("SQ3_State1, rate0 = %08x,rate1 = %08x\n",
-			 (int)priv->ulRatio_State0,
-			 (int)priv->ulRatio_State1);
-
-		if (priv->ulRatio_State1 < priv->ulRatio_State0) {
-			pr_debug("2.[%08x][%08x], uNumSQ3[%d]=%d, %d\n",
-				 (int)priv->ulRatio_State0,
-				 (int)priv->ulRatio_State1,
-				 (int)priv->wAntDiversityMaxRate,
-				 (int)priv->uNumSQ3[(int)priv->wAntDiversityMaxRate],
-				 (int)priv->uDiversityCnt);
-
-			s_vChangeAntenna(priv);
-
-			priv->TimerSQ3Tmax3.expires =  RUN_AT(priv->byTMax3 * HZ);
-			priv->TimerSQ3Tmax2.expires =  RUN_AT(priv->byTMax2 * HZ);
-			add_timer(&priv->TimerSQ3Tmax3);
-			add_timer(&priv->TimerSQ3Tmax2);
-		}
-	}
-	priv->byAntennaState = 0;
-	BBvClearAntDivSQ3Value(priv);
-
-	spin_unlock_irqrestore(&priv->lock, flags);
-}
diff --git a/drivers/staging/vt6655/baseband.h b/drivers/staging/vt6655/baseband.h
index d9f6d63..43a4fb1 100644
--- a/drivers/staging/vt6655/baseband.h
+++ b/drivers/staging/vt6655/baseband.h
@@ -93,21 +93,4 @@ void BBvSetRxAntennaMode(struct vnt_private *, unsigned char byAntennaMode);
 void BBvSetDeepSleep(struct vnt_private *, unsigned char byLocalID);
 void BBvExitDeepSleep(struct vnt_private *, unsigned char byLocalID);
 
-/* timer for antenna diversity */
-
-void
-TimerSQ3CallBack(
-	unsigned long
-);
-
-void
-TimerState1CallBack(
-	unsigned long
-);
-
-void BBvAntennaDiversity(struct vnt_private *,
-			 unsigned char byRxRate, unsigned char bySQ3);
-void
-BBvClearAntDivSQ3Value(struct vnt_private *);
-
 #endif /* __BASEBAND_H__ */
diff --git a/drivers/staging/vt6655/device.h b/drivers/staging/vt6655/device.h
index 96d8e62..440537e4 100644
--- a/drivers/staging/vt6655/device.h
+++ b/drivers/staging/vt6655/device.h
@@ -407,29 +407,6 @@ struct vnt_private {
 	unsigned char byBBCR88;
 	unsigned char byBBCR09;
 
-	bool bDiversityRegCtlON;
-	bool bDiversityEnable;
-	unsigned long ulDiversityNValue;
-	unsigned long ulDiversityMValue;
-	unsigned char byTMax;
-	unsigned char byTMax2;
-	unsigned char byTMax3;
-	unsigned long ulSQ3TH;
-
-	/* ANT diversity */
-	unsigned long uDiversityCnt;
-	unsigned char byAntennaState;
-	unsigned long ulRatio_State0;
-	unsigned long ulRatio_State1;
-
-	/* SQ3 functions for antenna diversity */
-	struct timer_list           TimerSQ3Tmax1;
-	struct timer_list           TimerSQ3Tmax2;
-	struct timer_list           TimerSQ3Tmax3;
-
-	unsigned long uNumSQ3[MAX_RATE];
-	unsigned short wAntDiversityMaxRate;
-
 	unsigned char abyEEPROM[EEP_MAX_CONTEXT_SIZE]; /* unsigned long alignment */
 
 	unsigned short wBeaconInterval;
diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index 05be34b..0408e91 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -126,10 +126,6 @@ DEVICE_PARAM(LongRetryLimit, "long frame retry limits");
 
 DEVICE_PARAM(BasebandType, "baseband type");
 
-#define DIVERSITY_ANT_DEF     0
-
-DEVICE_PARAM(bDiversityANTEnable, "ANT diversity mode");
-
 //
 // Static vars definitions
 //
@@ -152,7 +148,6 @@ static void vt6655_init_info(struct pci_dev *pcid,
 static void device_free_info(struct vnt_private *pDevice);
 static bool device_get_pci_info(struct vnt_private *, struct pci_dev *pcid);
 static void device_print_info(struct vnt_private *pDevice);
-static void device_init_diversity_timer(struct vnt_private *pDevice);
 static  irqreturn_t  device_intr(int irq,  void *dev_instance);
 
 #ifdef CONFIG_PM
@@ -216,7 +211,6 @@ static void device_get_options(struct vnt_private *pDevice)
 	pOpts->short_retry = SHORT_RETRY_DEF;
 	pOpts->long_retry = LONG_RETRY_DEF;
 	pOpts->bbp_type = BBP_TYPE_DEF;
-	pOpts->flags |= DEVICE_FLAGS_DiversityANT;
 }
 
 static void
@@ -224,7 +218,6 @@ device_set_options(struct vnt_private *pDevice)
 {
 	pDevice->byShortRetryLimit = pDevice->sOpts.short_retry;
 	pDevice->byLongRetryLimit = pDevice->sOpts.long_retry;
-	pDevice->bDiversityRegCtlON = (pDevice->sOpts.flags & DEVICE_FLAGS_DiversityANT) ? 1 : 0;
 	pDevice->byBBType = pDevice->sOpts.bbp_type;
 	pDevice->byPacketType = pDevice->byBBType;
 	pDevice->byAutoFBCtrl = AUTO_FB_0;
@@ -236,8 +229,6 @@ device_set_options(struct vnt_private *pDevice)
 	pr_debug(" byPreambleType= %d\n", (int)pDevice->byPreambleType);
 	pr_debug(" byShortPreamble= %d\n", (int)pDevice->byShortPreamble);
 	pr_debug(" byBBType= %d\n", (int)pDevice->byBBType);
-	pr_debug(" pDevice->bDiversityRegCtlON= %d\n",
-		 (int)pDevice->bDiversityRegCtlON);
 }
 
 //
@@ -249,7 +240,6 @@ static void device_init_registers(struct vnt_private *pDevice)
 	unsigned long flags;
 	unsigned int ii;
 	unsigned char byValue;
-	unsigned char byValue1;
 	unsigned char byCCKPwrdBm = 0;
 	unsigned char byOFDMPwrdBm = 0;
 
@@ -301,13 +291,6 @@ static void device_init_registers(struct vnt_private *pDevice)
 	if (byValue == 0)
 		byValue = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 
-	pDevice->ulDiversityNValue = 100*260;
-	pDevice->ulDiversityMValue = 100*16;
-	pDevice->byTMax = 1;
-	pDevice->byTMax2 = 4;
-	pDevice->ulSQ3TH = 0;
-	pDevice->byTMax3 = 64;
-
 	if (byValue == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
 		pDevice->byAntennaCount = 2;
 		pDevice->byTxAntennaMode = ANT_B;
@@ -318,16 +301,7 @@ static void device_init_registers(struct vnt_private *pDevice)
 			pDevice->byRxAntennaMode = ANT_A;
 		else
 			pDevice->byRxAntennaMode = ANT_B;
-
-		byValue1 = SROMbyReadEmbedded(pDevice->PortOffset,
-					      EEP_OFS_ANTENNA);
-
-		if ((byValue1 & 0x08) == 0)
-			pDevice->bDiversityEnable = false;
-		else
-			pDevice->bDiversityEnable = true;
 	} else  {
-		pDevice->bDiversityEnable = false;
 		pDevice->byAntennaCount = 1;
 		pDevice->dwTxAntennaSel = 0;
 		pDevice->dwRxAntennaSel = 0;
@@ -349,11 +323,6 @@ static void device_init_registers(struct vnt_private *pDevice)
 		}
 	}
 
-	pr_debug("bDiversityEnable=[%d],NValue=[%d],MValue=[%d],TMax=[%d],TMax2=[%d]\n",
-		 pDevice->bDiversityEnable, (int)pDevice->ulDiversityNValue,
-		 (int)pDevice->ulDiversityMValue, pDevice->byTMax,
-		 pDevice->byTMax2);
-
 	/* zonetype initial */
 	pDevice->byOriginalZonetype = pDevice->abyEEPROM[EEP_OFS_ZONETYPE];
 
@@ -493,24 +462,6 @@ static void device_init_registers(struct vnt_private *pDevice)
 	MACvStart(pDevice->PortOffset);
 }
 
-static void device_init_diversity_timer(struct vnt_private *pDevice)
-{
-	init_timer(&pDevice->TimerSQ3Tmax1);
-	pDevice->TimerSQ3Tmax1.data = (unsigned long) pDevice;
-	pDevice->TimerSQ3Tmax1.function = TimerSQ3CallBack;
-	pDevice->TimerSQ3Tmax1.expires = RUN_AT(HZ);
-
-	init_timer(&pDevice->TimerSQ3Tmax2);
-	pDevice->TimerSQ3Tmax2.data = (unsigned long) pDevice;
-	pDevice->TimerSQ3Tmax2.function = TimerSQ3CallBack;
-	pDevice->TimerSQ3Tmax2.expires = RUN_AT(HZ);
-
-	init_timer(&pDevice->TimerSQ3Tmax3);
-	pDevice->TimerSQ3Tmax3.data = (unsigned long) pDevice;
-	pDevice->TimerSQ3Tmax3.function = TimerState1CallBack;
-	pDevice->TimerSQ3Tmax3.expires = RUN_AT(HZ);
-}
-
 static void device_print_info(struct vnt_private *pDevice)
 {
 	dev_info(&pDevice->pcid->dev, "%s\n", get_chip_name(pDevice->chip_id));
@@ -1348,8 +1299,6 @@ static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 
 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
-		if (priv->bDiversityRegCtlON)
-			device_init_diversity_timer(priv);
 		break;
 	case NL80211_IFTYPE_ADHOC:
 		MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
@@ -1379,11 +1328,6 @@ static void vnt_remove_interface(struct ieee80211_hw *hw,
 
 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
-		if (priv->bDiversityRegCtlON) {
-			del_timer(&priv->TimerSQ3Tmax1);
-			del_timer(&priv->TimerSQ3Tmax2);
-			del_timer(&priv->TimerSQ3Tmax3);
-		}
 		break;
 	case NL80211_IFTYPE_ADHOC:
 		MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR, TCR_AUTOBCNTX);
diff --git a/drivers/staging/vt6655/dpc.c b/drivers/staging/vt6655/dpc.c
index 977683c..11cc090 100644
--- a/drivers/staging/vt6655/dpc.c
+++ b/drivers/staging/vt6655/dpc.c
@@ -116,12 +116,6 @@ static bool vnt_rx_data(struct vnt_private *priv, struct sk_buff *skb,
 			rx_status.flag = RX_FLAG_DECRYPTED;
 	}
 
-	if (priv->vif && priv->bDiversityEnable) {
-		if (ieee80211_is_data(fc) &&
-		    (frame_size > 50) && priv->vif->bss_conf.assoc)
-			BBvAntennaDiversity(priv, priv->rx_rate, 0);
-	}
-
 	memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 
 	ieee80211_rx_irqsafe(priv->hw, skb);