From 451dd48adc2ef29fd2f900693393cc9b9b4a849b Mon Sep 17 00:00:00 2001
From: Michiel Van Der Kolk <not.valid@email.address>
Date: Mon, 28 Mar 2005 00:00:24 +0000
Subject: Sound api improvements, rockboy sound, contributed by xshock.
 Playback of sound currently only works in boost mode, needs fixing.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6226 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/uda1380.c     |  4 ++-
 firmware/export/pcm_playback.h |  2 ++
 firmware/pcm_playback.c        | 78 +++++++++++++++++++++++++++++++++++-------
 3 files changed, 71 insertions(+), 13 deletions(-)

(limited to 'firmware')

diff --git a/firmware/drivers/uda1380.c b/firmware/drivers/uda1380.c
index e8b8c14399..8c3cf61eae 100644
--- a/firmware/drivers/uda1380.c
+++ b/firmware/drivers/uda1380.c
@@ -49,7 +49,7 @@ unsigned short uda1380_defaults[2*NUM_DEFAULT_REGS] =
         REG_I2S,      I2S_IFMT_IIS,
         REG_PWR,      PON_PLL | PON_HP | PON_DAC | EN_AVC | PON_AVC | PON_BIAS,
         REG_AMIX,     AMIX_RIGHT(0x10) | AMIX_LEFT(0x10), /* 00=max, 3f=mute */
-        REG_MASTER_VOL, MASTER_VOL_LEFT(0x7f) | MASTER_VOL_RIGHT(0x7f), /* 00=max, ff=mute */
+        REG_MASTER_VOL, MASTER_VOL_LEFT(0x20) | MASTER_VOL_RIGHT(0x20), /* 00=max, ff=mute */
         REG_MIX_VOL,    MIX_VOL_CHANNEL_1(0) | MIX_VOL_CHANNEL_2(0xff), /* 00=max, ff=mute */
         REG_EQ,         0,
         REG_MUTE,       MUTE_CH2, /* Mute channel 2 (digital decimation filter) */
@@ -131,6 +131,8 @@ int uda1380_set_regs(void)
 /* Initialize UDA1380 codec with default register values (uda1380_defaults) */
 int uda1380_init(void)
 {
+    PLLCR &= ~(1 << 22);     /* Set AudioClk = FXTAL/2*/
+
     if (uda1380_set_regs() == -1)
         return -1;
     
diff --git a/firmware/export/pcm_playback.h b/firmware/export/pcm_playback.h
index c44fb283ec..6010293bbd 100644
--- a/firmware/export/pcm_playback.h
+++ b/firmware/export/pcm_playback.h
@@ -19,9 +19,11 @@
 #ifndef PCM_PLAYBACK_H
 #define PCM_PLAYBACK_H
 
+void pcm_set_frequency(unsigned int frequency);
 void pcm_play_data(const unsigned char* start, int size,
                    void (*get_more)(unsigned char** start, long* size));
 void pcm_play_stop(void);
 bool pcm_is_playing(void);
+void pcm_set_volume(int volume);
 
 #endif
diff --git a/firmware/pcm_playback.c b/firmware/pcm_playback.c
index fba85f083b..bc2218be69 100644
--- a/firmware/pcm_playback.c
+++ b/firmware/pcm_playback.c
@@ -37,20 +37,32 @@
 #include "file.h"
 #include "buffer.h"
 
-bool pcm_playing;
+#include "sprintf.h"
+#include "button.h"
+#include <string.h>
+
+static bool pcm_playing;
+static int pcm_freq = 0x6; // 44.1 in default
 
 /* Set up the DMA transfer that kicks in when the audio FIFO gets empty */
-static void dma_start(const void *addr, long size)
-{
+static void dma_start(const void *addr_r, long size)
+{   
     pcm_playing = 1;
+    int i;
+    
+    int align;
+    align = 4;
+
+    void* addr = (void*)((((unsigned int)addr_r) >> 2) << 2); // always align data, never pass unaligned data
+    size = (size >> 2) << 2; // size shoudl also be always multiple of 4
 
     BUSMASTER_CTRL = 0x81; /* PARK[1,0]=10 + BCR24BIT */
 
     /* Set up DMA transfer  */
     DIVR0 = 54;          /* DMA0 is mapped into vector 54 in system.c */
-    SAR0 = (unsigned long)addr;         /* Source address */
+    SAR0 = ((unsigned long)addr) + align*4;         /* Source address */
     DAR0 = (unsigned long)&PDOR3;       /* Destination address */
-    BCR0 = size;                        /* Bytes to transfer */
+    BCR0 = size-(align*4);                        /* Bytes to transfer */
     DMAROUTE = (DMAROUTE & 0xffffff00) | DMA0_REQ_AUDIO_1;
     DMACONFIG = 1;   /* Enable DMA0Req => set DMAROUTE |= DMA0_REQ_AUDIO_1 */
 
@@ -61,14 +73,10 @@ static void dma_start(const void *addr, long size)
     ICR4 = (ICR4 & 0xffff00ff) | 0x00001c00;
     IMR &= ~(1<<14);      /* bit 14 is DMA0 */
 
-    IIS2CONFIG = 0x4300;   /* CLOCKSEL = AudioClk/8 (44.1kHz),
-                              data source = PDOR3 */
+    IIS2CONFIG = (pcm_freq << 12) | 0x300;   /* CLOCKSEL for right frequency +  data source = PDOR3 */
 
-    PDOR3 = 0; /* These are needed to generate FIFO empty request to DMA.. */
-    PDOR3 = 0;
-    PDOR3 = 0;
-    PDOR3 = 0;
-    PDOR3 = 0;
+    for(i = 0; i < align; i++)
+        PDOR3 = ((unsigned int*)(addr))[i]; /* These are needed to generate FIFO empty request to DMA.. */
 }
 
 /* Stops the DMA transfer and interrupt */
@@ -76,12 +84,51 @@ static void dma_stop(void)
 {
     pcm_playing = 0;
     DCR0 = 0;
+                       
+/*    DMAROUTE &= 0xffffff00;
+    DMACONFIG = 0;*/
+
+    IIS2CONFIG = 0x800;
     
     /* Disable DMA0 interrupt */
     IMR |= (1<<14);
     ICR4 &= 0xffff00ff;
 }
 
+
+/* set volume of the main channel */
+void pcm_set_volume(int volume)
+{
+   if(volume > 0)
+   {
+       uda1380_mute(0);
+       uda1380_setvol(0xff - volume); 
+   }
+   else
+   {
+       uda1380_mute(1);
+   } 
+}
+
+/* sets frequency of input to DAC */
+void pcm_set_frequency(unsigned int frequency)
+{
+   switch(frequency)
+   {
+    case 11025:
+        pcm_freq = 0x2;
+        break;
+    case 22050:
+        pcm_freq = 0x4;
+        break;
+    case 44100:
+        pcm_freq = 0x6;
+        break;
+    default:
+        pcm_freq = 0x6;
+   }
+}
+
 /* the registered callback function to ask for more mp3 data */
 static void (*callback_for_more)(unsigned char**, long*) = NULL;
 
@@ -110,8 +157,15 @@ void DMA0(void)
     unsigned char* start;
     long size = 0;
 
+    int res = DSR0;
+
     DSR0 = 1;    /* Clear interrupt */
 
+    if(res == 0x41)
+    {
+       dma_stop();
+    }
+
     if (callback_for_more)
     {
         callback_for_more(&start, &size);
-- 
cgit v1.2.3