b43: HT-PHY: upload PHY values when switching channel

After calibrating radio you can find few PHY writes in MMIO dumps:
 phy_read(0x0009) -> 0x0000
phy_write(0x01ce) <- 0x03dd
phy_write(0x01cf) <- 0x03d9
phy_write(0x01d0) <- 0x03d5
phy_write(0x01d1) <- 0x0424
phy_write(0x01d2) <- 0x0429
phy_write(0x01d3) <- 0x042d
By comparing to N-PHY code we found out that they are PHY tables for
channel switching plus band info read at the beginning.

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

drivers/net/wireless/b43/phy_ht.c

@@ -82,7 +82,21 @@ static void b43_phy_ht_channel_setup(struct b43_wldev *dev,
 				const struct b43_phy_ht_channeltab_e_phy *e,
 				struct ieee80211_channel *new_channel)
 {
-	/* TODO */
+	bool old_band_5ghz;
+
+	old_band_5ghz = b43_phy_read(dev, B43_PHY_HT_BANDCTL) & 0; /* FIXME */
+	if (new_channel->band == IEEE80211_BAND_5GHZ && !old_band_5ghz) {
+		/* TODO */
+	} else if (new_channel->band == IEEE80211_BAND_2GHZ && old_band_5ghz) {
+		/* TODO */
+	}
+
+	b43_phy_write(dev, B43_PHY_HT_BW1, e->bw1);
+	b43_phy_write(dev, B43_PHY_HT_BW2, e->bw2);
+	b43_phy_write(dev, B43_PHY_HT_BW3, e->bw3);
+	b43_phy_write(dev, B43_PHY_HT_BW4, e->bw4);
+	b43_phy_write(dev, B43_PHY_HT_BW5, e->bw5);
+	b43_phy_write(dev, B43_PHY_HT_BW6, e->bw6);
 }
 
 static int b43_phy_ht_set_channel(struct b43_wldev *dev,

drivers/net/wireless/b43/phy_ht.h

@@ -4,9 +4,16 @@
 #include "phy_common.h"
 
 
+#define B43_PHY_HT_BANDCTL			0x009 /* Band control */
 #define B43_PHY_HT_TABLE_ADDR			0x072 /* Table address */
 #define B43_PHY_HT_TABLE_DATALO			0x073 /* Table data low */
 #define B43_PHY_HT_TABLE_DATAHI			0x074 /* Table data high */
+#define B43_PHY_HT_BW1				0x1CE
+#define B43_PHY_HT_BW2				0x1CF
+#define B43_PHY_HT_BW3				0x1D0
+#define B43_PHY_HT_BW4				0x1D1
+#define B43_PHY_HT_BW5				0x1D2
+#define B43_PHY_HT_BW6				0x1D3
 
 #define B43_PHY_HT_RF_CTL1			B43_PHY_EXTG(0x010)
 
@@ -20,7 +27,12 @@
 
 /* Values for PHY registers used on channel switching */
 struct b43_phy_ht_channeltab_e_phy {
-	/* TODO */
+	u16 bw1;
+	u16 bw2;
+	u16 bw3;
+	u16 bw4;
+	u16 bw5;
+	u16 bw6;
 };