audio on the m:robe 100

- using the existing wm8751 driver (from gigabeat port) integrated into the portal player environment
- only 44.1kHz at the moment
- for some reason the output is very quiet
- due to the lack of usable buttons the easiest (?) way to start an audio file is to copy the .playlist_control, config.cfg and nvram.bin files from another target, where auto resume is enabled.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16117 a1c6a512-1295-4272-9138-f99709370657

firmware/drivers/audio/wm8751.c

@@ -100,6 +100,10 @@ static int adaptivebass2hw(int value)
 /* Reset and power up the WM8751 */
 void audiohw_preinit(void)
 {
+#ifdef CPU_PP502x
+    i2s_reset();
+#endif
+
     /*
      * 1. Switch on power supplies.
      *    By default the WM8751 is in Standby Mode, the DAC is

firmware/export/config-mrobe100.h

@@ -56,11 +56,7 @@
 #define PLUGIN_BUFFER_SIZE 0x80000
 
 /* Wolfsom audio codec */
-/* TODO: #define HAVE_WM8751 */
-#define HAVE_WM8731
-
-/* WM8731 has no tone controls, so we use the software ones */
-#define HAVE_SW_TONE_CONTROLS
+#define HAVE_WM8751
 
 #define AB_REPEAT_ENABLE 1
 

firmware/target/arm/pcm-pp.c

@@ -23,6 +23,10 @@
 #include "audio.h"
 #include "sound.h"
 
+#ifdef HAVE_WM8751
+#define MROBE100_44100HZ     (0x40|(0x11 << 1)|1)
+#endif
+
 /** DMA **/
 
 #ifdef CPU_PP502x
@@ -81,15 +85,25 @@ struct dma_data dma_play_data NOCACHEBSS_ATTR =
 };
 
 static unsigned long pcm_freq NOCACHEDATA_ATTR = HW_SAMPR_DEFAULT; /* 44.1 is default */
+#ifdef HAVE_WM8751
+/* Samplerate control for audio codec */
+static int sr_ctrl = MROBE100_44100HZ;
+#endif
 
 void pcm_set_frequency(unsigned int frequency)
 {
     (void)frequency;
     pcm_freq = HW_SAMPR_DEFAULT;
+#ifdef HAVE_WM8751
+    sr_ctrl  = MROBE100_44100HZ;
+#endif
 }
 
 void pcm_apply_settings(void)
 {
+#ifdef HAVE_WM8751
+    audiohw_set_frequency(sr_ctrl);
+#endif
     pcm_curr_sampr = pcm_freq;
 }
 
@@ -308,7 +322,7 @@ void pcm_play_dma_init(void)
     /* Initialize default register values. */
     audiohw_init();
 
-#ifndef HAVE_WM8731
+#if !defined(HAVE_WM8731) && !defined(HAVE_WM8751)
     /* Power on */
     audiohw_enable_output(true);
     /* Unmute the master channel (DAC should be at zero point now). */

firmware/target/arm/wmcodec-pp.c

@@ -28,7 +28,7 @@
 #include "audiohw.h"
 #include "i2c-pp.h"
 
-#if defined(IRIVER_H10) || defined(IRIVER_H10_5GB)
+#if defined(IRIVER_H10) || defined(IRIVER_H10_5GB) || defined(MROBE_100)
 /* The H10's audio codec uses an I2C address of 0x1b */
 #define I2C_AUDIO_ADDRESS 0x1b
 #else
@@ -96,13 +96,13 @@ void audiohw_init(void) {
 #endif /* IPOD_1G2G/3G */
 #endif
     
-#ifdef HAVE_WM8731
+#if defined(HAVE_WM8731) || defined(HAVE_WM8751)
     audiohw_preinit();
 #endif
    
 }
 
-#ifndef HAVE_WM8731
+#if !defined(HAVE_WM8731) && !defined(HAVE_WM8751)
 void audiohw_postinit(void)
 {
 }