1 files changed, 58 insertions, 0 deletions

diff --git a/firmware/target/coldfire/iaudio/adc-iaudio.c b/firmware/target/coldfire/iaudio/adc-iaudio.c
new file mode 100644
index 0000000000..1895cacfe9
--- /dev/null
+++ b/firmware/target/coldfire/iaudio/adc-iaudio.c
@@ -0,0 +1,58 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "kernel.h"
+#include "thread.h"
+#include "adc.h"
+#include "pcf50606.h"
+
+/* get remaining 2 bits and return 10 bit value */
+static int get_10bit_voltage(int msbdata)
+{
+    int data = msbdata << 2;
+    data |= pcf50606_read(0x31) & 0x3;
+    return data;
+}
+
+unsigned short adc_scan(int channel)
+{
+    static const int adcc2_parms[] =
+    {
+        [ADC_BUTTONS] = 0x81 | (5 << 1), /* 8b  - ADCIN2 */
+        [ADC_REMOTE]  = 0x81 | (6 << 1), /* 8b  - ADCIN3 */
+        [ADC_BATTERY] = 0x01 | (0 << 1), /* 10b - BATVOLT, resistive divider */
+    };
+
+    int level;
+    int data;
+
+    level = set_irq_level(HIGHEST_IRQ_LEVEL);
+
+    pcf50606_write(0x2f, adcc2_parms[channel]);
+    data = pcf50606_read(0x30);
+
+    if (channel == ADC_BATTERY)
+        data = get_10bit_voltage(data);
+
+    set_irq_level(level);
+
+    return (unsigned short)data;
+}