b43: N-PHY: implement RX IQ estimation

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

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 68c1582db712..776d0082ef1c 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -408,6 +408,45 @@ static void b43_nphy_reset_cca(struct b43_wldev *dev)
         /* TODO: N PHY Force RF Seq with argument 2 */
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RxIqEst */
+static void b43_nphy_rx_iq_est(struct b43_wldev *dev, struct nphy_iq_est *est,
+                                u16 samps, u8 time, bool wait)
+{
+        int i;
+        u16 tmp;
+
+        b43_phy_write(dev, B43_NPHY_IQEST_SAMCNT, samps);
+        b43_phy_maskset(dev, B43_NPHY_IQEST_WT, ~B43_NPHY_IQEST_WT_VAL, time);
+        if (wait)
+                b43_phy_set(dev, B43_NPHY_IQEST_CMD, B43_NPHY_IQEST_CMD_MODE);
+        else
+                b43_phy_mask(dev, B43_NPHY_IQEST_CMD, ~B43_NPHY_IQEST_CMD_MODE);
+
+        b43_phy_set(dev, B43_NPHY_IQEST_CMD, B43_NPHY_IQEST_CMD_START);
+
+        for (i = 1000; i; i--) {
+                tmp = b43_phy_read(dev, B43_NPHY_IQEST_CMD);
+                if (!(tmp & B43_NPHY_IQEST_CMD_START)) {
+                        est->i0_pwr = (b43_phy_read(dev, B43_NPHY_IQEST_IPACC_HI0) << 16) |
+                                        b43_phy_read(dev, B43_NPHY_IQEST_IPACC_LO0);
+                        est->q0_pwr = (b43_phy_read(dev, B43_NPHY_IQEST_QPACC_HI0) << 16) |
+                                        b43_phy_read(dev, B43_NPHY_IQEST_QPACC_LO0);
+                        est->iq0_prod = (b43_phy_read(dev, B43_NPHY_IQEST_IQACC_HI0) << 16) |
+                                        b43_phy_read(dev, B43_NPHY_IQEST_IQACC_LO0);
+
+                        est->i1_pwr = (b43_phy_read(dev, B43_NPHY_IQEST_IPACC_HI1) << 16) |
+                                        b43_phy_read(dev, B43_NPHY_IQEST_IPACC_LO1);
+                        est->q1_pwr = (b43_phy_read(dev, B43_NPHY_IQEST_QPACC_HI1) << 16) |
+                                        b43_phy_read(dev, B43_NPHY_IQEST_QPACC_LO1);
+                        est->iq1_prod = (b43_phy_read(dev, B43_NPHY_IQEST_IQACC_HI1) << 16) |
+                                        b43_phy_read(dev, B43_NPHY_IQEST_IQACC_LO1);
+                        return;
+                }
+                udelay(10);
+        }
+        memset(est, 0, sizeof(*est));
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RxIqCoeffs */
 static void b43_nphy_rx_iq_coeffs(struct b43_wldev *dev, bool write,
                                         struct b43_phy_n_iq_comp *pcomp)