1 files changed, 83 insertions, 0 deletions

diff --git a/firmware/target/coldfire/iriver/h300/adc-h300.c b/firmware/target/coldfire/iriver/h300/adc-h300.c
new file mode 100644
index 0000000000..31702eaef1
--- /dev/null
+++ b/firmware/target/coldfire/iriver/h300/adc-h300.c
@@ -0,0 +1,83 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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"
+
+static unsigned char adcdata[NUM_ADC_CHANNELS];
+
+static int adcc2_parms[] =
+{
+    [ADC_BUTTONS] = 0x80 | (5 << 1) | 1, /* ADCIN2 */
+    [ADC_REMOTE]  = 0x80 | (6 << 1) | 1, /* ADCIN3 */
+    [ADC_BATTERY] = 0x80 | (0 << 1) | 1, /* BATVOLT, resistive divider */
+    [ADC_REMOTEDETECT] = 0x80 | (2 << 1) | 1, /* ADCIN1, resistive divider */
+};
+
+unsigned short adc_scan(int channel)
+{
+    int level = set_irq_level(HIGHEST_IRQ_LEVEL);
+    unsigned char data;
+
+    pcf50606_write(0x2f, adcc2_parms[channel]);
+    data = pcf50606_read(0x30);
+
+    adcdata[channel] = data;
+
+    set_irq_level(level);
+    return data;
+}
+
+
+unsigned short adc_read(int channel)
+{
+    return adcdata[channel];
+}
+
+static int adc_counter;
+
+static void adc_tick(void)
+{
+    if(++adc_counter == HZ)
+    {
+        adc_counter = 0;
+        adc_scan(ADC_BATTERY);
+        adc_scan(ADC_REMOTEDETECT); /* Temporary. Remove when the remote
+                                       detection feels stable. */
+    }
+}
+
+void adc_init(void)
+{
+    or_l(0x80600080, &GPIO_FUNCTION); /* GPIO7:  CS
+                                         GPIO21: Data In (to the ADC)
+                                         GPIO22: CLK
+                                         GPIO31: Data Out (from the ADC) */
+    or_l(0x00600080, &GPIO_ENABLE);
+    or_l(0x80, &GPIO_OUT);          /* CS high */
+    and_l(~0x00400000, &GPIO_OUT);  /* CLK low */
+
+    adc_scan(ADC_BATTERY);
+    
+    tick_add_task(adc_tick);
+}