b43: N-PHY: prepare code for reapplying TX cal coeffs

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

1 files changed, 34 insertions, 1 deletions

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 8992457b0c0b..3dd22bc527d0 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -2587,6 +2587,39 @@ static int b43_nphy_cal_tx_iq_lo(struct b43_wldev *dev,
         return error;
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/ReapplyTxCalCoeffs */
+static void b43_nphy_reapply_tx_cal_coeffs(struct b43_wldev *dev)
+{
+        struct b43_phy_n *nphy = dev->phy.n;
+        u8 i;
+        u16 buffer[7];
+        bool equal = true;
+
+        if (!nphy->txiqlocal_coeffsvalid || 1 /* FIXME */)
+                return;
+
+        b43_ntab_read_bulk(dev, B43_NTAB16(15, 80), 7, buffer);
+        for (i = 0; i < 4; i++) {
+                if (buffer[i] != nphy->txiqlocal_bestc[i]) {
+                        equal = false;
+                        break;
+                }
+        }
+
+        if (!equal) {
+                b43_ntab_write_bulk(dev, B43_NTAB16(15, 80), 4,
+                                        nphy->txiqlocal_bestc);
+                for (i = 0; i < 4; i++)
+                        buffer[i] = 0;
+                b43_ntab_write_bulk(dev, B43_NTAB16(15, 88), 4,
+                                        buffer);
+                b43_ntab_write_bulk(dev, B43_NTAB16(15, 85), 2,
+                                        &nphy->txiqlocal_bestc[5]);
+                b43_ntab_write_bulk(dev, B43_NTAB16(15, 93), 2,
+                                        &nphy->txiqlocal_bestc[5]);
+        }
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/CalRxIqRev2 */
 static int b43_nphy_rev2_cal_rx_iq(struct b43_wldev *dev,
                         struct nphy_txgains target, u8 type, bool debug)
@@ -2617,7 +2650,7 @@ static int b43_nphy_rev2_cal_rx_iq(struct b43_wldev *dev,
         b43_nphy_stay_in_carrier_search(dev, 1);
 
         if (dev->phy.rev < 2)
-                ;/* TODO: Call N PHY Reapply TX Cal Coeffs */
+                b43_nphy_reapply_tx_cal_coeffs(dev);
         b43_ntab_read_bulk(dev, B43_NTAB16(7, 0x110), 2, gain_save);
         for (i = 0; i < 2; i++) {
                 b43_nphy_iq_cal_gain_params(dev, i, target, &cal_params[i]);