b43: N-PHY: set band on every channel switch

Seems to be required by some hardware, wl does it every time.

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

2 files changed, 10 insertions, 8 deletions

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 2c5583231d2f..ef1acaec7027 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -6058,23 +6058,23 @@ static void b43_nphy_channel_setup(struct b43_wldev *dev,
         struct b43_phy *phy = &dev->phy;
         struct b43_phy_n *nphy = dev->phy.n;
         int ch = new_channel->hw_value;
-
-        u16 old_band_5ghz;
         u16 tmp16;
 
-        old_band_5ghz =
-                b43_phy_read(dev, B43_NPHY_BANDCTL) & B43_NPHY_BANDCTL_5GHZ;
-        if (new_channel->band == IEEE80211_BAND_5GHZ && !old_band_5ghz) {
+        if (new_channel->band == IEEE80211_BAND_5GHZ) {
                 tmp16 = b43_read16(dev, B43_MMIO_PSM_PHY_HDR);
                 b43_write16(dev, B43_MMIO_PSM_PHY_HDR, tmp16 | 4);
-                b43_phy_set(dev, B43_PHY_B_BBCFG, 0xC000);
+                /* Put BPHY in the reset */
+                b43_phy_set(dev, B43_PHY_B_BBCFG,
+                            B43_PHY_B_BBCFG_RSTCCA | B43_PHY_B_BBCFG_RSTRX);
                 b43_write16(dev, B43_MMIO_PSM_PHY_HDR, tmp16);
                 b43_phy_set(dev, B43_NPHY_BANDCTL, B43_NPHY_BANDCTL_5GHZ);
-        } else if (new_channel->band == IEEE80211_BAND_2GHZ && old_band_5ghz) {
+        } else if (new_channel->band == IEEE80211_BAND_2GHZ) {
                 b43_phy_mask(dev, B43_NPHY_BANDCTL, ~B43_NPHY_BANDCTL_5GHZ);
                 tmp16 = b43_read16(dev, B43_MMIO_PSM_PHY_HDR);
                 b43_write16(dev, B43_MMIO_PSM_PHY_HDR, tmp16 | 4);
-                b43_phy_mask(dev, B43_PHY_B_BBCFG, 0x3FFF);
+                /* Take BPHY out of the reset */
+                b43_phy_mask(dev, B43_PHY_B_BBCFG,
+                             (u16)~(B43_PHY_B_BBCFG_RSTCCA | B43_PHY_B_BBCFG_RSTRX));
                 b43_write16(dev, B43_MMIO_PSM_PHY_HDR, tmp16);
         }
 
diff --git a/drivers/net/wireless/b43/phy_n.h b/drivers/net/wireless/b43/phy_n.h
index 474bf758295d..30bec815b969 100644
--- a/drivers/net/wireless/b43/phy_n.h
+++ b/drivers/net/wireless/b43/phy_n.h
@@ -869,6 +869,8 @@
 #define B43_NPHY_REV7_RF_CTL_OVER6              B43_PHY_N(0x347)
 
 #define B43_PHY_B_BBCFG                         B43_PHY_N_BMODE(0x001) /* BB config */
+#define  B43_PHY_B_BBCFG_RSTCCA                 0x4000 /* Reset CCA */
+#define  B43_PHY_B_BBCFG_RSTRX                  0x8000 /* Reset RX */
 #define B43_PHY_B_TEST                          B43_PHY_N_BMODE(0x00A)
 
 struct b43_wldev;