Change-Id: Ia6294d651dcffdcaf8b62e67bcef52bd8c158dea Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@xxxxxxxxx> Reviewed-on: http://git-mwg.jer.intel.com/gerrit/1947 Tested-by: Jenkins Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx> --- drivers/net/wireless/iwlwifi/iwl-agn-lib.c | 22 +++++++++++++++++++++- drivers/net/wireless/iwlwifi/iwl-commands.h | 6 ++++++ 2 files changed, 27 insertions(+), 1 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c index 9d88565..cb4b31f 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c @@ -274,9 +274,20 @@ void iwlagn_send_advance_bt_config(struct iwl_priv *priv) return; } + /* + * Possible situations when BT needs to take over for receive, + * at the same time where STA needs to response to AP's frame(s), + * reduce the tx power of the required response frames, by that, + * allow the concurrent BT receive & WiFi transmit + * (BT - ANT A, WiFi -ANT B), without interference to one another + * + * Reduced tx power apply to control frames only (ACK/Back/CTS) + * when indicated by the BT config command + */ basic.kill_ack_mask = priv->kill_ack_mask; basic.kill_cts_mask = priv->kill_cts_mask; - basic.reduce_txpower = priv->reduced_txpower; + if (priv->reduced_txpower) + basic.reduce_txpower = IWLAGN_BT_REDUCED_TX_PWR; basic.valid = priv->bt_valid; /* @@ -590,6 +601,15 @@ static bool iwlagn_set_kill_msk(struct iwl_priv *priv, return need_update; } +/* + * Upon RSSI changes, sends a bt config command with following changes + * 1. enable/disable "reduced control frames tx power + * 2. update the "kill)ack_mask" and "kill_cts_mask" + * + * If "reduced tx power" is enabled, uCode shall + * 1. ACK/Back/CTS rate shall reduced to 6Mbps + * 2. not use duplciate 20/40MHz mode + */ static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv, struct iwl_bt_uart_msg *uart_msg) { diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h index 83a6930..2813a0a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-commands.h +++ b/drivers/net/wireless/iwlwifi/iwl-commands.h @@ -1910,6 +1910,8 @@ enum iwl_bt_kill_idx { IWLAGN_BT_VALID_REDUCED_TX_PWR | \ IWLAGN_BT_VALID_3W_LUT) +#define IWLAGN_BT_REDUCED_TX_PWR BIT(0) + #define IWLAGN_BT_DECISION_LUT_SIZE 12 struct iwl_basic_bt_cmd { @@ -1923,6 +1925,10 @@ struct iwl_basic_bt_cmd { u8 bt3_timer_t2_value; __le16 bt4_reaction_time; /* unused */ __le32 bt3_lookup_table[IWLAGN_BT_DECISION_LUT_SIZE]; + /* + * bit 0: use reduced tx power for control frame + * bit 1 - 7: reserved + */ u8 reduce_txpower; u8 reserved; __le16 valid; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
