iwlwifi: use the results from disconnected antenna algorithm

This patch makes usage of the results from disconnected antenna alg to
know how many antennas are connected.

It also synchronizes between the chain noise alg and the W/A that
disables power management during association. All the antennas must be
enables during the chain noise algorithm. Hence, power management is
restored only after the completion of the algorithm.

In the future, we will need to update the AP that we don't support MIMO
if there is only one antenna connected. We also need to update the rate
scaling algorithm.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
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>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 7934f56f7292..6e150f678c68 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -699,8 +699,9 @@ enum iwl4965_false_alarm_state {
 
 enum iwl4965_chain_noise_state {
         IWL_CHAIN_NOISE_ALIVE = 0,  /* must be 0 */
-        IWL_CHAIN_NOISE_ACCUMULATE = 1,
-        IWL_CHAIN_NOISE_CALIBRATED = 2,
+        IWL_CHAIN_NOISE_ACCUMULATE,
+        IWL_CHAIN_NOISE_CALIBRATED,
+        IWL_CHAIN_NOISE_DONE,
 };
 
 enum iwl4965_calib_enabled_state {
@@ -758,17 +759,18 @@ struct iwl_sensitivity_data {
 
 /* Chain noise (differential Rx gain) calib data */
 struct iwl_chain_noise_data {
-        u8 state;
-        u16 beacon_count;
+        u32 active_chains;
         u32 chain_noise_a;
         u32 chain_noise_b;
         u32 chain_noise_c;
         u32 chain_signal_a;
         u32 chain_signal_b;
         u32 chain_signal_c;
+        u16 beacon_count;
         u8 disconn_array[NUM_RX_CHAINS];
         u8 delta_gain_code[NUM_RX_CHAINS];
         u8 radio_write;
+        u8 state;
 };
 
 #define EEPROM_SEM_TIMEOUT 10           /* milliseconds */