b43: N-PHY: implement calculating IQ gain params

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/phy_n.c

@@ -1216,6 +1216,44 @@ static void b43_nphy_tx_cal_radio_setup(struct b43_wldev *dev)
 	}
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/IqCalGainParams */
+static void b43_nphy_iq_cal_gain_params(struct b43_wldev *dev, u16 core,
+					struct nphy_txgains target,
+					struct nphy_iqcal_params *params)
+{
+	int i, j, indx;
+	u16 gain;
+
+	if (dev->phy.rev >= 3) {
+		params->txgm = target.txgm[core];
+		params->pga = target.pga[core];
+		params->pad = target.pad[core];
+		params->ipa = target.ipa[core];
+		params->cal_gain = (params->txgm << 12) | (params->pga << 8) |
+					(params->pad << 4) | (params->ipa);
+		for (j = 0; j < 5; j++)
+			params->ncorr[j] = 0x79;
+	} else {
+		gain = (target.pad[core]) | (target.pga[core] << 4) |
+			(target.txgm[core] << 8);
+
+		indx = (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ) ?
+			1 : 0;
+		for (i = 0; i < 9; i++)
+			if (tbl_iqcal_gainparams[indx][i][0] == gain)
+				break;
+		i = min(i, 8);
+
+		params->txgm = tbl_iqcal_gainparams[indx][i][1];
+		params->pga = tbl_iqcal_gainparams[indx][i][2];
+		params->pad = tbl_iqcal_gainparams[indx][i][3];
+		params->cal_gain = (params->txgm << 7) | (params->pga << 4) |
+					(params->pad << 2);
+		for (j = 0; j < 4; j++)
+			params->ncorr[j] = tbl_iqcal_gainparams[indx][i][4 + j];
+	}
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/UpdateTxCalLadder */
 static void b43_nphy_update_tx_cal_ladder(struct b43_wldev *dev, u16 core)
 {