Atheros AR600x driver + build glue

chromeos/drivers/ath6kl/wlan/src/wlan_utils.c

+//------------------------------------------------------------------------------
+// <copyright file="wlan_utils.c" company="Atheros">
+//    Copyright (c) 2004-2008 Atheros Corporation.  All rights reserved.
+// 
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// Software distributed under the License is distributed on an "AS
+// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// rights and limitations under the License.
+//
+//
+//------------------------------------------------------------------------------
+//==============================================================================
+// This module implements frequently used wlan utilies
+//
+// Author(s): ="Atheros"
+//==============================================================================
+#include <a_config.h>
+#include <athdefs.h>
+#include <a_types.h>
+#include <a_osapi.h>
+
+/*
+ * converts ieee channel number to frequency
+ */
+A_UINT16
+wlan_ieee2freq(int chan)
+{
+    if (chan == 14) {
+        return 2484;
+    }
+    if (chan < 14) {    /* 0-13 */
+        return (2407 + (chan*5));
+    }
+    if (chan < 27) {    /* 15-26 */
+        return (2512 + ((chan-15)*20));
+    }
+    return (5000 + (chan*5));
+}
+
+/*
+ * Converts MHz frequency to IEEE channel number.
+ */
+A_UINT32
+wlan_freq2ieee(A_UINT16 freq)
+{
+    if (freq == 2484)
+        return 14;
+    if (freq < 2484)
+        return (freq - 2407) / 5;
+    if (freq < 5000)
+        return 15 + ((freq - 2512) / 20);
+    return (freq - 5000) / 5;
+}