b43: N-PHY: add TX LP FBW (TX filter 40 related)

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

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index e21526f..242f16d 100644 (file)
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -378,6 +378,28 @@ static void b43_nphy_pa_override(struct b43_wldev *dev, bool enable)
        }
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/TxLpFbw */
+static void b43_nphy_tx_lp_fbw(struct b43_wldev *dev)
+{
+       struct b43_phy_n *nphy = dev->phy.n;
+       u16 tmp;
+       enum ieee80211_band band = b43_current_band(dev->wl);
+       bool ipa = (nphy->ipa2g_on && band == IEEE80211_BAND_2GHZ) ||
+                       (nphy->ipa5g_on && band == IEEE80211_BAND_5GHZ);
+
+       if (dev->phy.rev >= 3) {
+               if (ipa) {
+                       tmp = 4;
+                       b43_phy_write(dev, B43_NPHY_TXF_40CO_B32S2,
+                             (((((tmp << 3) | tmp) << 3) | tmp) << 3) | tmp);
+               }
+
+               tmp = 1;
+               b43_phy_write(dev, B43_NPHY_TXF_40CO_B1S2,
+                             (((((tmp << 3) | tmp) << 3) | tmp) << 3) | tmp);
+       }
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/BmacPhyClkFgc */
 static void b43_nphy_bmac_clock_fgc(struct b43_wldev *dev, bool force)
 {
@@ -1494,7 +1516,7 @@ int b43_phy_initn(struct b43_wldev *dev)
        b43_phy_write(dev, B43_NPHY_TXMACDELAY, 0x0320);
        if (phy->rev >= 3 && phy->rev <= 6)
                b43_phy_write(dev, B43_NPHY_PLOAD_CSENSE_EXTLEN, 0x0014);
-       /* b43_nphy_tx_lp_fbw(dev); */
+       b43_nphy_tx_lp_fbw(dev);
        /* TODO N PHY Spur Workaround */
 
        b43err(dev->wl, "IEEE 802.11n devices are not supported, yet.\n");