H300: ADC driver

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7906 a1c6a512-1295-4272-9138-f99709370657

firmware/drivers/adc.c

@@ -22,6 +22,7 @@
 #include "kernel.h"
 #include "thread.h"
 #include "adc.h"
+#include "pcf50606.h"
 
 #if CONFIG_CPU == SH7034
 /**************************************************************************
@@ -107,9 +108,29 @@ void adc_init(void)
     sleep(2);    /* Ensure valid readings when adc_init returns */
 }
 #elif CONFIG_CPU == MCF5249
-
 static unsigned char adcdata[NUM_ADC_CHANNELS];
 
+#ifdef IRIVER_H300_SERIES
+static int channelnum[] =
+{
+    5,   /* ADC_BUTTONS */
+    6,   /* ADC_REMOTE */
+    0,   /* ADC_BATTERY */
+};
+
+unsigned char adc_scan(int channel)
+{
+    unsigned char data;
+    
+    pcf50606_write(0x2f, 0x80 | (channelnum[channel] << 1) | 1);
+    data = pcf50606_read(0x30);
+
+    adcdata[channel] = data;
+
+    return data;
+}
+#else
+
 #define CS_LO  and_l(~0x80, &GPIO_OUT)
 #define CS_HI  or_l(0x80, &GPIO_OUT)
 #define CLK_LO and_l(~0x00400000, &GPIO_OUT)
@@ -176,6 +197,7 @@ unsigned char adc_scan(int channel)
 
     return data;
 }
+#endif
 
 unsigned short adc_read(int channel)
 {
@@ -195,6 +217,8 @@ static void adc_tick(void)
 
 void adc_init(void)
 {
+#ifdef IRIVER_H300_SERIES
+#else
     or_l(0x80600080, &GPIO_FUNCTION); /* GPIO7:  CS
                                          GPIO21: Data In (to the ADC)
                                          GPIO22: CLK
@@ -202,6 +226,7 @@ void adc_init(void)
     or_l(0x00600080, &GPIO_ENABLE);
     or_l(0x80, &GPIO_OUT);          /* CS high */
     and_l(~0x00400000, &GPIO_OUT);  /* CLK low */
+#endif
 
     adc_scan(ADC_BATTERY);
     

firmware/export/adc.h

@@ -21,7 +21,7 @@
 
 #include "config.h"
 
-#ifdef IRIVER_H100_SERIES
+#if defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
 #define NUM_ADC_CHANNELS 4
 
 #define ADC_BUTTONS 0
@@ -30,14 +30,6 @@
 #define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
 
 #else
-#ifdef IRIVER_H300
-/* TODO: we don't have enough info about the ADC for the H3x0 for now, so this
-   stuff is only added here for now to make things compile. */
-#define ADC_BUTTONS -2
-#define ADC_REMOTE  -3
-unsigned char adc_scan(int channel);
-
-#endif
 
 #define NUM_ADC_CHANNELS 8
 

firmware/export/config-h300.h

@@ -57,7 +57,7 @@
 /* Type of mobile power */
 #define CONFIG_BATTERY BATT_LIPOL1300
 
-#define BATTERY_SCALE_FACTOR 16665 /* FIX: this value is picked at random */
+#define BATTERY_SCALE_FACTOR 23437 /* FIX: this value is picked at random */
 
 /* Define this if the platform can charge batteries */
 #define HAVE_CHARGING 1