diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-core.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index dbeaca15dda..46683eacfdc 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -740,6 +740,17 @@ static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt) return idle_cnt; } +/* up to 4 chains */ +static u8 iwl_count_chain_bitmap(u32 chain_bitmap) +{ + u8 res; + res = (chain_bitmap & BIT(0)) >> 0; + res += (chain_bitmap & BIT(1)) >> 1; + res += (chain_bitmap & BIT(2)) >> 2; + res += (chain_bitmap & BIT(4)) >> 4; + return res; +} + /** * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image * @@ -750,25 +761,35 @@ void iwl_set_rxon_chain(struct iwl_priv *priv) { bool is_single = is_single_rx_stream(priv); bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status); - u8 idle_rx_cnt, active_rx_cnt; + u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; + u32 active_chains; u16 rx_chain; /* Tell uCode which antennas are actually connected. * Before first association, we assume all antennas are connected. * Just after first association, iwl_chain_noise_calibration() * checks which antennas actually *are* connected. */ - rx_chain = priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; + if (priv->chain_noise_data.active_chains) + active_chains = priv->chain_noise_data.active_chains; + else + active_chains = priv->hw_params.valid_rx_ant; + + rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; /* How many receivers should we use? */ active_rx_cnt = iwl_get_active_rx_chain_count(priv); idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt); - /* correct rx chain count accoridng hw settings */ - if (priv->hw_params.rx_chains_num < active_rx_cnt) - active_rx_cnt = priv->hw_params.rx_chains_num; - if (priv->hw_params.rx_chains_num < idle_rx_cnt) - idle_rx_cnt = priv->hw_params.rx_chains_num; + /* correct rx chain count according hw settings + * and chain noise calibration + */ + valid_rx_cnt = iwl_count_chain_bitmap(active_chains); + if (valid_rx_cnt < active_rx_cnt) + active_rx_cnt = valid_rx_cnt; + + if (valid_rx_cnt < idle_rx_cnt) + idle_rx_cnt = valid_rx_cnt; rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; |