ath5k: Update channel functions

 * Add channel function for RF2425 (got this from decompiling binary
   HAL, i have no idea why there is a 5GHz section but i'm looking
   into it)
 * Update RF5112 channel function (also got this from decompiling binary HAL)
 * Set JAPAN setting for channel 14 on all PHY chips

Changes-licensed-under: ISC
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 55 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath5k/phy.c b/drivers/net/wireless/ath5k/phy.c
index 66af70bd14e7..cbc362d20719 100644
--- a/drivers/net/wireless/ath5k/phy.c
+++ b/drivers/net/wireless/ath5k/phy.c
@@ -1898,9 +1898,6 @@ static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
         data = data0 = data1 = data2 = 0;
         c = channel->center_freq;
 
-        /*
-         * Set the channel on the RF5112 or newer
-         */
         if (c < 4800) {
                 if (!((c - 2224) % 5)) {
                         data0 = ((2 * (c - 704)) - 3040) / 10;
@@ -1912,7 +1909,7 @@ static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
                         return -EINVAL;
 
                 data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8);
-        } else {
+        } else if ((c - (c % 5)) != 2 || c > 5435) {
                 if (!(c % 20) && c >= 5120) {
                         data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
                         data2 = ath5k_hw_bitswap(3, 2);
@@ -1924,6 +1921,9 @@ static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
                         data2 = ath5k_hw_bitswap(1, 2);
                 } else
                         return -EINVAL;
+        } else {
+                data0 = ath5k_hw_bitswap((10 * (c - 2) - 4800) / 25 + 1, 8);
+                data2 = ath5k_hw_bitswap(0, 2);
         }
 
         data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001;
@@ -1935,6 +1935,45 @@ static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
 }
 
 /*
+ * Set the channel on the RF2425
+ */
+static int ath5k_hw_rf2425_channel(struct ath5k_hw *ah,
+                struct ieee80211_channel *channel)
+{
+        u32 data, data0, data2;
+        u16 c;
+
+        data = data0 = data2 = 0;
+        c = channel->center_freq;
+
+        if (c < 4800) {
+                data0 = ath5k_hw_bitswap((c - 2272), 8);
+                data2 = 0;
+        /* ? 5GHz ? */
+        } else if ((c - (c % 5)) != 2 || c > 5435) {
+                if (!(c % 20) && c < 5120)
+                        data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
+                else if (!(c % 10))
+                        data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
+                else if (!(c % 5))
+                        data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
+                else
+                        return -EINVAL;
+                data2 = ath5k_hw_bitswap(1, 2);
+        } else {
+                data0 = ath5k_hw_bitswap((10 * (c - 2) - 4800) / 25 + 1, 8);
+                data2 = ath5k_hw_bitswap(0, 2);
+        }
+
+        data = (data0 << 4) | data2 << 2 | 0x1001;
+
+        ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
+        ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
+
+        return 0;
+}
+
+/*
  * Set a channel on the radio chip
  */
 int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel)
@@ -1963,6 +2002,9 @@ int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel)
         case AR5K_RF5111:
                 ret = ath5k_hw_rf5111_channel(ah, channel);
                 break;
+        case AR5K_RF2425:
+                ret = ath5k_hw_rf2425_channel(ah, channel);
+                break;
         default:
                 ret = ath5k_hw_rf5112_channel(ah, channel);
                 break;
@@ -1971,6 +2013,15 @@ int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel)
         if (ret)
                 return ret;
 
+        /* Set JAPAN setting for channel 14 */
+        if (channel->center_freq == 2484) {
+                AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
+                                AR5K_PHY_CCKTXCTL_JAPAN);
+        } else {
+                AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
+                                AR5K_PHY_CCKTXCTL_WORLD);
+        }
+
         ah->ah_current_channel.center_freq = channel->center_freq;
         ah->ah_current_channel.hw_value = channel->hw_value;
         ah->ah_turbo = channel->hw_value == CHANNEL_T ? true : false;