Commit f53d9f12 authored May 17, 2014 by Malcolm Priestley Committed by Greg Kroah-Hartman May 18, 2014

staging: vt6656: rf.c additional power.

Provides extra power on weak RSSI.

The values orginate from the vendors driver.

It is applied later in RFbRawSetPower to simplify and check that it doesn't
exceed the max power.

Vendor driver VT6656_Linux_src_v1.21.03_x86_11.04.zip
http://www.viaembedded.com/servlet/downloadSvl?id=1890&download_file_id=14704


This is GPL-licensed code.

vendors code
...
if (pDevice->byRFType == RF_VT3226D0) {
	if (lRSSI == 0){
		lAdditionalPower = 7;
	}
	else if ((lRSSI < -60) && (lRSSI >= -65)){
		lAdditionalPower = 5;
		//lAdditionalPower = 9;
	}
	else if ((lRSSI < -65) && (lRSSI >= -70)){
		lAdditionalPower = 7;
		//lAdditionalPower = 9;
	}
	else if ((lRSSI < -70) && (lRSSI >= -80)){
		lAdditionalPower = 9;
		}
	else if (lRSSI < -80) {
		lAdditionalPower = 9;
	}
}
else {
	if (lRSSI == 0){
		lAdditionalPower = 7;
	}
	else if ((lRSSI < -70) && (lRSSI >= -75)){
		lAdditionalPower = 5;
	}
	else if ((lRSSI < -75) && (lRSSI >= -80)){
			lAdditionalPower = 7;
		}
		else if (lRSSI < -80) {
			lAdditionalPower = 9;
		}
	}

...

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

parent e03e1e39

drivers/staging/vt6656/rf.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -769,6 +769,32 @@ int RFbSetPower(struct vnt_private *priv, u32 rate, u32 channel)
		return ret;
		}

		static u8 vnt_rf_addpower(struct vnt_private *priv)
		{
		s32 rssi = -priv->uCurrRSSI;

		if (!rssi)
		return 7;

		if (priv->byRFType == RF_VT3226D0) {
		if (rssi < -70)
		return 9;
		else if (rssi < -65)
		return 7;
		else if (rssi < -60)
		return 5;
		} else {
		if (rssi < -80)
		return 9;
		else if (rssi < -75)
		return 7;
		else if (rssi < -70)
		return 5;
		}

		return 0;
		}

		/*
		* Description: Set Tx power
		*
		@@ -788,6 +814,10 @@ int RFbRawSetPower(struct vnt_private *priv, u8 power, u32 rate)
		u32 power_setting = 0;
		int ret = true;

		power += vnt_rf_addpower(priv);
		if (power > VNT_RF_MAX_POWER)
		power = VNT_RF_MAX_POWER;

		if (priv->byCurPwr == power)
		return true;

drivers/staging/vt6656/rf.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,8 @@
		#define RF_EMU 0x80
		#define RF_MASK 0x7F

		#define VNT_RF_MAX_POWER 0x3f

		extern const u8 RFaby11aChannelIndex[200];

		int IFRFbWriteEmbedded(struct vnt_private *, u32 dwData);