b43: N-PHY: add workarounds for gain control

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

1 files changed, 129 insertions, 1 deletions

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 60e730a6f1dd..d738d769b025 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -712,6 +712,134 @@ static void b43_nphy_stop_playback(struct b43_wldev *dev)
                 b43_nphy_stay_in_carrier_search(dev, 0);
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/WorkaroundsGainCtrl */
+static void b43_nphy_gain_crtl_workarounds(struct b43_wldev *dev)
+{
+        struct b43_phy_n *nphy = dev->phy.n;
+        u8 i, j;
+        u8 code;
+
+        /* TODO: for PHY >= 3
+        s8 *lna1_gain, *lna2_gain;
+        u8 *gain_db, *gain_bits;
+        u16 *rfseq_init;
+        u8 lpf_gain[6] = { 0x00, 0x06, 0x0C, 0x12, 0x12, 0x12 };
+        u8 lpf_bits[6] = { 0, 1, 2, 3, 3, 3 };
+        */
+
+        u8 rfseq_events[3] = { 6, 8, 7 };
+        u8 rfseq_delays[3] = { 10, 30, 1 };
+
+        if (dev->phy.rev >= 3) {
+                /* TODO */
+        } else {
+                /* Set Clip 2 detect */
+                b43_phy_set(dev, B43_NPHY_C1_CGAINI,
+                                B43_NPHY_C1_CGAINI_CL2DETECT);
+                b43_phy_set(dev, B43_NPHY_C2_CGAINI,
+                                B43_NPHY_C2_CGAINI_CL2DETECT);
+
+                /* Set narrowband clip threshold */
+                b43_phy_set(dev, B43_NPHY_C1_NBCLIPTHRES, 0x84);
+                b43_phy_set(dev, B43_NPHY_C2_NBCLIPTHRES, 0x84);
+
+                if (!dev->phy.is_40mhz) {
+                        /* Set dwell lengths */
+                        b43_phy_set(dev, B43_NPHY_CLIP1_NBDWELL_LEN, 0x002B);
+                        b43_phy_set(dev, B43_NPHY_CLIP2_NBDWELL_LEN, 0x002B);
+                        b43_phy_set(dev, B43_NPHY_W1CLIP1_DWELL_LEN, 0x0009);
+                        b43_phy_set(dev, B43_NPHY_W1CLIP2_DWELL_LEN, 0x0009);
+                }
+
+                /* Set wideband clip 2 threshold */
+                b43_phy_maskset(dev, B43_NPHY_C1_CLIPWBTHRES,
+                                ~B43_NPHY_C1_CLIPWBTHRES_CLIP2,
+                                21);
+                b43_phy_maskset(dev, B43_NPHY_C2_CLIPWBTHRES,
+                                ~B43_NPHY_C2_CLIPWBTHRES_CLIP2,
+                                21);
+
+                if (!dev->phy.is_40mhz) {
+                        b43_phy_maskset(dev, B43_NPHY_C1_CGAINI,
+                                ~B43_NPHY_C1_CGAINI_GAINBKOFF, 0x1);
+                        b43_phy_maskset(dev, B43_NPHY_C2_CGAINI,
+                                ~B43_NPHY_C2_CGAINI_GAINBKOFF, 0x1);
+                        b43_phy_maskset(dev, B43_NPHY_C1_CCK_CGAINI,
+                                ~B43_NPHY_C1_CCK_CGAINI_GAINBKOFF, 0x1);
+                        b43_phy_maskset(dev, B43_NPHY_C2_CCK_CGAINI,
+                                ~B43_NPHY_C2_CCK_CGAINI_GAINBKOFF, 0x1);
+                }
+
+                b43_phy_set(dev, B43_NPHY_CCK_SHIFTB_REF, 0x809C);
+
+                if (nphy->gain_boost) {
+                        if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ &&
+                            dev->phy.is_40mhz)
+                                code = 4;
+                        else
+                                code = 5;
+                } else {
+                        code = dev->phy.is_40mhz ? 6 : 7;
+                }
+
+                /* Set HPVGA2 index */
+                b43_phy_maskset(dev, B43_NPHY_C1_INITGAIN,
+                                ~B43_NPHY_C1_INITGAIN_HPVGA2,
+                                code << B43_NPHY_C1_INITGAIN_HPVGA2_SHIFT);
+                b43_phy_maskset(dev, B43_NPHY_C2_INITGAIN,
+                                ~B43_NPHY_C2_INITGAIN_HPVGA2,
+                                code << B43_NPHY_C2_INITGAIN_HPVGA2_SHIFT);
+
+                b43_phy_write(dev, B43_NPHY_TABLE_ADDR, 0x1D06);
+                b43_phy_write(dev, B43_NPHY_TABLE_DATALO,
+                                        (code << 8 | 0x7C));
+                b43_phy_write(dev, B43_NPHY_TABLE_DATALO,
+                                        (code << 8 | 0x7C));
+
+                /* TODO: b43_nphy_adjust_lna_gain_table(dev); */
+
+                if (nphy->elna_gain_config) {
+                        b43_phy_write(dev, B43_NPHY_TABLE_ADDR, 0x0808);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x0);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x1);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x1);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x1);
+
+                        b43_phy_write(dev, B43_NPHY_TABLE_ADDR, 0x0C08);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x0);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x1);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x1);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO, 0x1);
+
+                        b43_phy_write(dev, B43_NPHY_TABLE_ADDR, 0x1D06);
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO,
+                                        (code << 8 | 0x74));
+                        b43_phy_write(dev, B43_NPHY_TABLE_DATALO,
+                                        (code << 8 | 0x74));
+                }
+
+                if (dev->phy.rev == 2) {
+                        for (i = 0; i < 4; i++) {
+                                b43_phy_write(dev, B43_NPHY_TABLE_ADDR,
+                                                (0x0400 * i) + 0x0020);
+                                for (j = 0; j < 21; j++)
+                                        b43_phy_write(dev,
+                                                B43_NPHY_TABLE_DATALO, 3 * j);
+                        }
+
+                        /* TODO: b43_nphy_set_rf_sequence(dev, 5,
+                                        rfseq_events, rfseq_delays, 3);*/
+                        b43_phy_maskset(dev, B43_NPHY_OVER_DGAIN1,
+                                (u16)~B43_NPHY_OVER_DGAIN_CCKDGECV,
+                                0x5A << B43_NPHY_OVER_DGAIN_CCKDGECV_SHIFT);
+
+                        if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
+                                b43_phy_maskset(dev, B43_PHY_N(0xC5D),
+                                                0xFF80, 4);
+                }
+        }
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/Workarounds */
 static void b43_nphy_workarounds(struct b43_wldev *dev)
 {
@@ -786,7 +914,7 @@ static void b43_nphy_workarounds(struct b43_wldev *dev)
                 /*TODO:b43_nphy_set_rf_sequence(dev, 0, events1, delays1, 7);*/
                 /*TODO:b43_nphy_set_rf_sequence(dev, 1, events2, delays2, 7);*/
 
-                /*TODO:b43_nphy_gain_crtl_workarounds(dev);*/
+                b43_nphy_gain_crtl_workarounds(dev);
 
                 if (dev->phy.rev < 2) {
                         if (b43_phy_read(dev, B43_NPHY_RXCTL) & 0x2)