M:Robe 500: Add support for more audio frequencies, initialize and set the touchscreen PWD pin.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23089 a1c6a512-1295-4272-9138-f99709370657

firmware/drivers/audio/tsc2100.c

@@ -116,5 +116,23 @@ void audiohw_close(void)
 
 void audiohw_set_frequency(int fsel)
 {
-    (void)fsel;
+    int reg_val;
+    reg_val = tsc2100_readreg(TSAC1_PAGE, TSAC1_ADDRESS);
+    
+    reg_val &= ~(0x07<<3);
+    
+    switch(fsel) 
+    {
+    case HW_FREQ_8:
+        reg_val |= (0x06<<3);
+        break;
+    case HW_FREQ_11:
+        reg_val |= (0x04<<3);
+        break;
+    case HW_FREQ_44:
+    default:
+        break;
+    }
+
+    tsc2100_writereg(TSAC1_PAGE, TSAC1_ADDRESS, reg_val);
 }

firmware/export/config-mrobe500.h

@@ -180,7 +180,7 @@
 #define PLUGIN_BUFFER_SIZE 0x200000
 #endif
 
-#define HW_SAMPR_CAPS SAMPR_CAP_44
+#define HW_SAMPR_CAPS SAMPR_CAP_44 | SAMPR_CAP_22 | SAMPR_CAP_11 | SAMPR_CAP_8
 
 #define BATTERY_CAPACITY_DEFAULT 1500 /* default battery capacity */
 #define BATTERY_CAPACITY_MIN 1000        /* min. capacity selectable */

firmware/target/arm/tms320dm320/mrobe-500/adc-mr500.c

@@ -28,6 +28,15 @@
 
 void adc_init(void)
 {
+    /* Pin 15 appears to be the nPWD pin - make sure it is high otherwise the
+     *  touchscreen does not work, audio has not been tested, but it is
+     *  expected that is will also not work when low.
+     */
+    IO_GIO_DIR0     &= ~(1<<15);     /* output */
+    IO_GIO_INV0     &= ~(1<<15);     /* non-inverted */
+    IO_GIO_FSEL0    &= ~(0x03<<12);  /* normal pin */
+    IO_GIO_BITSET0  =   (1<<15);
+
     /* Initialize the touchscreen and the battery readout */
     tsc2100_adc_init();