iwlwifi-2.6: enables RX TKIP decryption in HW

This patch enables RX TKIP decryption in HW.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -7187,6 +7187,56 @@ static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
 	return rc;
 }
 
+static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
+			struct ieee80211_key_conf *keyconf, const u8 *addr,
+			u32 iv32, u16 *phase1key)
+{
+	struct iwl_priv *priv = hw->priv;
+	u8 sta_id = IWL_INVALID_STATION;
+	unsigned long flags;
+	__le16 key_flags = 0;
+	int i;
+	DECLARE_MAC_BUF(mac);
+
+	IWL_DEBUG_MAC80211("enter\n");
+
+	sta_id = iwl4965_hw_find_station(priv, addr);
+	if (sta_id == IWL_INVALID_STATION) {
+		IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
+				   print_mac(mac, addr));
+		return;
+	}
+
+	iwl4965_scan_cancel_timeout(priv, 100);
+
+	key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
+	key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
+	key_flags &= ~STA_KEY_FLG_INVALID;
+
+	if (sta_id == priv->hw_setting.bcast_sta_id)
+		key_flags |= STA_KEY_MULTICAST_MSK;
+
+	spin_lock_irqsave(&priv->sta_lock, flags);
+
+	priv->stations[sta_id].sta.key.key_offset =
+					(sta_id % STA_KEY_MAX_NUM);/* FIXME */
+	priv->stations[sta_id].sta.key.key_flags = key_flags;
+	priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
+
+	for (i = 0; i < 5; i++)
+		priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
+			cpu_to_le16(phase1key[i]);
+
+	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
+	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
+
+	iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
+
+	spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+	IWL_DEBUG_MAC80211("leave\n");
+}
+
 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 			   const u8 *local_addr, const u8 *addr,
 			   struct ieee80211_key_conf *key)
@@ -8128,6 +8178,7 @@ static struct ieee80211_ops iwl4965_hw_ops = {
 	.config_interface = iwl4965_mac_config_interface,
 	.configure_filter = iwl4965_configure_filter,
 	.set_key = iwl4965_mac_set_key,
+	.update_tkip_key = iwl4965_mac_update_tkip_key,
 	.get_stats = iwl4965_mac_get_stats,
 	.get_tx_stats = iwl4965_mac_get_tx_stats,
 	.conf_tx = iwl4965_mac_conf_tx,