iwlwifi: make PS use named constants
This patch adds named constants for configuring MIMO power save
chain settings.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index d80184e..8203887 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -697,8 +697,12 @@
}
EXPORT_SYMBOL(iwl_set_rxon_ht);
-/*
- * Determine how many receiver/antenna chains to use.
+#define IWL_NUM_RX_CHAINS_MULTIPLE 3
+#define IWL_NUM_RX_CHAINS_SINGLE 2
+#define IWL_NUM_IDLE_CHAINS_DUAL 2
+#define IWL_NUM_IDLE_CHAINS_SINGLE 1
+
+/* Determine how many receiver/antenna chains to use.
* More provides better reception via diversity. Fewer saves power.
* MIMO (dual stream) requires at least 2, but works better with 3.
* This does not determine *which* chains to use, just how many.
@@ -711,9 +715,9 @@
/* # of Rx chains to use when expecting MIMO. */
if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
WLAN_HT_CAP_SM_PS_STATIC)))
- return 2;
+ return IWL_NUM_RX_CHAINS_SINGLE;
else
- return 3;
+ return IWL_NUM_RX_CHAINS_MULTIPLE;
}
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
@@ -724,10 +728,11 @@
switch (priv->current_ht_config.sm_ps) {
case WLAN_HT_CAP_SM_PS_STATIC:
case WLAN_HT_CAP_SM_PS_DYNAMIC:
- idle_cnt = (is_cam) ? 2 : 1;
+ idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
+ IWL_NUM_IDLE_CHAINS_SINGLE;
break;
case WLAN_HT_CAP_SM_PS_DISABLED:
- idle_cnt = (is_cam) ? active_cnt : 1;
+ idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
break;
case WLAN_HT_CAP_SM_PS_INVALID:
default:
@@ -796,7 +801,7 @@
priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
- if (!is_single && (active_rx_cnt >= 2) && is_cam)
+ if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
else
priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;