1 files changed, 117 insertions, 0 deletions

diff --git a/firmware/target/coldfire/iriver/h100/adc-h100.c b/firmware/target/coldfire/iriver/h100/adc-h100.c
new file mode 100644
index 0000000000..b29a2247ad
--- /dev/null
+++ b/firmware/target/coldfire/iriver/h100/adc-h100.c
@@ -0,0 +1,117 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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"
+static unsigned char adcdata[NUM_ADC_CHANNELS];
+
+
+#define CS_LO  and_l(~0x80, &GPIO_OUT)
+#define CS_HI  or_l(0x80, &GPIO_OUT)
+#define CLK_LO and_l(~0x00400000, &GPIO_OUT)
+#define CLK_HI or_l(0x00400000, &GPIO_OUT)
+#define DO     (GPIO_READ & 0x80000000)
+#define DI_LO  and_l(~0x00200000, &GPIO_OUT)
+#define DI_HI  or_l(0x00200000, &GPIO_OUT)
+
+/* delay loop */
+#define DELAY   do { int _x; for(_x=0;_x<10;_x++);} while (0)
+
+unsigned short adc_scan(int channel)
+{
+    unsigned char data = 0;
+    int i;
+    
+    CS_LO;
+
+    DI_HI;  /* Start bit */
+    DELAY;
+    CLK_HI;
+    DELAY;
+    CLK_LO;
+    
+    DI_HI;  /* Single channel */
+    DELAY;
+    CLK_HI;
+    DELAY;
+    CLK_LO;
+
+    if(channel & 1) /* LSB of channel number */
+        DI_HI;
+    else
+        DI_LO;
+    DELAY;
+    CLK_HI;
+    DELAY;
+    CLK_LO;
+    
+    if(channel & 2) /* MSB of channel number */
+        DI_HI;
+    else
+        DI_LO;
+    DELAY;
+    CLK_HI;
+    DELAY;
+    CLK_LO;
+
+    DELAY;
+
+    for(i = 0;i < 8;i++) /* 8 bits of data */
+    {
+        CLK_HI;
+        DELAY;
+        CLK_LO;
+        DELAY;
+        data <<= 1;
+        data |= DO?1:0;
+    }
+    
+    CS_HI;
+
+    adcdata[channel] = data;
+
+    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)
+{
+    adc_scan(ADC_BATTERY);
+    
+    tick_add_task(adc_tick);
+}