diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/phy.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/phy.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/phy.c b/drivers/net/wireless/ath/ath9k/phy.c index a15532eaae19..df55e28a6560 100644 --- a/drivers/net/wireless/ath/ath9k/phy.c +++ b/drivers/net/wireless/ath/ath9k/phy.c @@ -41,6 +41,10 @@ #include "hw.h" +static void ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32, + u32 numBits, u32 firstBit, + u32 column); + /** * ath9k_hw_write_regs - ?? * @@ -429,6 +433,67 @@ void ath9k_hw_9280_spur_mitigate(struct ath_hw *ah, struct ath9k_channel *chan) /* All code below is for non single-chip solutions */ +/* + * Fix on 2.4 GHz band for orientation sensitivity issue by increasing + * rf_pwd_icsyndiv. + * + * Theoretical Rules: + * if 2 GHz band + * if forceBiasAuto + * if synth_freq < 2412 + * bias = 0 + * else if 2412 <= synth_freq <= 2422 + * bias = 1 + * else // synth_freq > 2422 + * bias = 2 + * else if forceBias > 0 + * bias = forceBias & 7 + * else + * no change, use value from ini file + * else + * no change, invalid band + * + * 1st Mod: + * 2422 also uses value of 2 + * <approved> + * + * 2nd Mod: + * Less than 2412 uses value of 0, 2412 and above uses value of 2 + */ +static void ath9k_hw_force_bias(struct ath_hw *ah, u16 synth_freq) +{ + struct ath_common *common = ath9k_hw_common(ah); + u32 tmp_reg; + int reg_writes = 0; + u32 new_bias = 0; + + if (!AR_SREV_5416(ah) || synth_freq >= 3000) { + return; + } + + BUG_ON(AR_SREV_9280_10_OR_LATER(ah)); + + if (synth_freq < 2412) + new_bias = 0; + else if (synth_freq < 2422) + new_bias = 1; + else + new_bias = 2; + + /* pre-reverse this field */ + tmp_reg = ath9k_hw_reverse_bits(new_bias, 3); + + ath_print(common, ATH_DBG_CONFIG, + "Force rf_pwd_icsyndiv to %1d on %4d\n", + new_bias, synth_freq); + + /* swizzle rf_pwd_icsyndiv */ + ath9k_phy_modify_rx_buffer(ah->analogBank6Data, tmp_reg, 3, 181, 3); + + /* write Bank 6 with new params */ + REG_WRITE_RF_ARRAY(&ah->iniBank6, ah->analogBank6Data, reg_writes); +} + /** * ath9k_hw_set_channel - tune to a channel on the external AR2133/AR5133 radios * @ah: atheros hardware stucture @@ -499,6 +564,9 @@ int ath9k_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan) return -EINVAL; } + ath9k_hw_force_bias(ah, freq); + ath9k_hw_decrease_chain_power(ah, chan); + reg32 = (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) | (1 << 5) | 0x1; @@ -946,6 +1014,8 @@ ath9k_hw_decrease_chain_power(struct ath_hw *ah, struct ath9k_channel *chan) u32 bank6SelMask; u32 *bank6Temp = ah->bank6Temp; + BUG_ON(AR_SREV_9280_10_OR_LATER(ah)); + switch (ah->config.diversity_control) { case ATH9K_ANT_FIXED_A: bank6SelMask = |