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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>
This commit is contained in:
Malcolm Priestley 2014-05-17 09:50:18 +01:00 committed by Greg Kroah-Hartman
parent e03e1e39b6
commit f53d9f12c5
2 changed files with 32 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/staging/vt6656/rf.c
View File

@ -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;

2
drivers/staging/vt6656/rf.h
View File

@ -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);