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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>
This commit is contained in:
Tomas Winkler 2008-09-16 14:01:04 +08:00 committed by John W. Linville
parent 9ccacb86b5
commit 9e5e6c327d
1 changed files with 12 additions and 7 deletions
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19
drivers/net/wireless/iwlwifi/iwl-core.c
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@ -697,8 +697,12 @@ void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
}
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 @@ static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
/* # 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 @@ static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
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 @@ void iwl_set_rxon_chain(struct iwl_priv *priv)
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;