iwlwifi: add bt full concurrency support
Adding the bluetooth full concurrency support for WiFi/BT combo devices.
Driver should configure uCode to operate in "full concurrency" mode (via
LUT) if both conditions are met:
- Antenna Coupling is more than 35dB
- WiFi Channel Inhibition Request is hornored by BT Core
Currently, there is no antenna coupling information provided by uCode;
use module parameter to specified the antenna coupling in dB.
When in "full concurrency" mode, driver need to download different LUT
to uCode while sending bt configuration command; also, driver need to
configure the device operate in 1x1 while in full concurrency mode.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index f8eed92..687b534 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -758,6 +758,32 @@
(a->is_SGI == b->is_SGI);
}
+static void rs_bt_update_lq(struct iwl_priv *priv,
+ struct iwl_lq_sta *lq_sta)
+{
+ struct iwl_scale_tbl_info *tbl;
+ bool full_concurrent;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (priv->bt_ci_compliance && priv->bt_ant_couple_ok)
+ full_concurrent = true;
+ else
+ full_concurrent = false;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ if (priv->bt_full_concurrent != full_concurrent) {
+ priv->bt_full_concurrent = full_concurrent;
+
+ /* Update uCode's rate table. */
+ tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
+ rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
+ iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC, false);
+
+ queue_work(priv->workqueue, &priv->bt_full_concurrency);
+ }
+}
+
/*
* mac80211 sends us Tx status
*/
@@ -940,6 +966,10 @@
/* See if there's a better rate or modulation mode to try. */
if (sta && sta->supp_rates[sband->band])
rs_rate_scale_perform(priv, skb, sta, lq_sta);
+
+ /* Is there a need to switch between full concurrency and 3-wire? */
+ if (priv->bt_ant_couple_ok)
+ rs_bt_update_lq(priv, lq_sta);
}
/*
@@ -1325,6 +1355,15 @@
else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE &&
tbl->action > IWL_LEGACY_SWITCH_SISO)
tbl->action = IWL_LEGACY_SWITCH_SISO;
+
+ /* configure as 1x1 if bt full concurrency */
+ if (priv->bt_full_concurrent) {
+ if (!iwl_ht_enabled(priv))
+ tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
+ else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
+ tbl->action = IWL_LEGACY_SWITCH_SISO;
+ }
+
start_action = tbl->action;
for (; ;) {
lq_sta->action_counter++;
@@ -1484,6 +1523,12 @@
/* stay in SISO */
tbl->action = IWL_SISO_SWITCH_ANTENNA1;
}
+
+ /* configure as 1x1 if bt full concurrency */
+ if (priv->bt_full_concurrent &&
+ tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2)
+ tbl->action = IWL_SISO_SWITCH_ANTENNA1;
+
start_action = tbl->action;
for (;;) {
lq_sta->action_counter++;
@@ -1645,6 +1690,13 @@
/* switch in SISO */
tbl->action = IWL_MIMO2_SWITCH_SISO_A;
}
+
+ /* configure as 1x1 if bt full concurrency */
+ if (priv->bt_full_concurrent &&
+ (tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
+ tbl->action > IWL_MIMO2_SWITCH_SISO_C))
+ tbl->action = IWL_MIMO2_SWITCH_SISO_A;
+
start_action = tbl->action;
for (;;) {
lq_sta->action_counter++;
@@ -1810,6 +1862,13 @@
/* switch in SISO */
tbl->action = IWL_MIMO3_SWITCH_SISO_A;
}
+
+ /* configure as 1x1 if bt full concurrency */
+ if (priv->bt_full_concurrent &&
+ (tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
+ tbl->action > IWL_MIMO3_SWITCH_SISO_C))
+ tbl->action = IWL_MIMO3_SWITCH_SISO_A;
+
start_action = tbl->action;
for (;;) {
lq_sta->action_counter++;
@@ -2741,7 +2800,8 @@
/* Fill 1st table entry (index 0) */
lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate);
- if (num_of_ant(tbl_type.ant_type) == 1) {
+ if (num_of_ant(tbl_type.ant_type) == 1 ||
+ (priv && priv->bt_full_concurrent)) {
lq_cmd->general_params.single_stream_ant_msk =
tbl_type.ant_type;
} else if (num_of_ant(tbl_type.ant_type) == 2) {
@@ -2752,8 +2812,12 @@
index++;
repeat_rate--;
- if (priv)
- valid_tx_ant = priv->hw_params.valid_tx_ant;
+ if (priv) {
+ if (priv->bt_full_concurrent)
+ valid_tx_ant = ANT_A;
+ else
+ valid_tx_ant = priv->hw_params.valid_tx_ant;
+ }
/* Fill rest of rate table */
while (index < LINK_QUAL_MAX_RETRY_NUM) {