pcm: Further cleanup of unused bits of the PCM ACPI:

* pcm_get_bytes_remaining()
 * pcm_calculate_peaks()
 * pcm_get_peak_buffer()

Nothing in-tree uses these at all (except for the lua plugin wrapper)

Change-Id: I971b7beed6760250c8b1ce58f401a601e1e2d585

firmware/target/arm/as3525/pcm-as3525.c

@@ -200,17 +200,6 @@ void pcm_dma_apply_settings(void)
              0x01ffffff);
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    int oldstatus = disable_irq_save();
-    size_t addr = DMAC_CH_SRC_ADDR(0);
-    size_t start_addr = (size_t)dma_start_addr;
-    size_t start_size = dma_start_size;
-    restore_interrupt(oldstatus);
-
-    return start_size - addr + start_addr;
-}
-
 const void * pcm_play_dma_get_peak_buffer(int *count)
 {
     int oldstatus = disable_irq_save();

firmware/target/arm/imx233/pcm-imx233.c

@@ -175,12 +175,6 @@ void pcm_dma_apply_settings(void)
     pcm_play_unlock();
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    struct imx233_dma_info_t info = imx233_dma_get_info(APB_AUDIO_DAC, DMA_INFO_AHB_BYTES);
-    return info.ahb_bytes;
-}
-
 const void *pcm_play_dma_get_peak_buffer(int *count)
 {
     if(!dac_freezed)

firmware/target/arm/imx31/gigabeat-s/pcm-gigabeat-s.c

@@ -224,30 +224,6 @@ void pcm_play_dma_stop(void)
     play_stop_pcm();
 }
 
-/* Return the number of bytes waiting - full L-R sample pairs only */
-size_t pcm_get_bytes_waiting(void)
-{
-    static unsigned long dsa NOCACHEBSS_ATTR;
-    long offs, size;
-    int oldstatus;
-
-    /* read burst dma source address register in channel context */
-    sdma_read_words(&dsa, CHANNEL_CONTEXT_ADDR(DMA_PLAY_CH_NUM)+0x0b, 1);
-
-    oldstatus = disable_irq_save();
-    offs = dsa - (unsigned long)dma_play_bd.buf_addr;
-    size = dma_play_bd.mode.count;
-    restore_irq(oldstatus);
-
-    /* Be addresses are coherent (no buffer change during read) */
-    if (offs >= 0 && offs < size)
-    {
-        return (size - offs) & ~3;
-    }
-
-    return 0;
-}
-
 /* Return a pointer to the samples and the number of them in *count */
 const void * pcm_play_dma_get_peak_buffer(int *count)
 {

firmware/target/arm/pcm-telechips.c

@@ -194,11 +194,6 @@ void pcm_play_unlock(void)
    restore_fiq(status);
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    return dma_play_data.size & ~3;
-}
-
 #ifdef HAVE_RECORDING
 /* TODO: implement */
 void pcm_rec_dma_init(void)

firmware/target/arm/pnx0101/pcm-pnx0101.c

@@ -192,11 +192,6 @@ void pcm_dma_apply_settings(void)
 {
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    return p_size & ~3;
-}
-
 const void * pcm_play_dma_get_peak_buffer(int *count)
 {
     unsigned long addr = (unsigned long)p;

firmware/target/arm/pp/pcm-pp.c

@@ -497,11 +497,6 @@ void pcm_play_dma_stop(void)
 #endif
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    return dma_play_data.size & ~3;
-}
-
 void pcm_play_dma_init(void)
 {
     /* Initialize default register values. */

firmware/target/arm/rk27xx/pcm-rk27xx.c

@@ -250,12 +250,6 @@ void pcm_dma_apply_settings(void)
     audiohw_set_frequency(pcm_fsel);
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    /* current terminate count is in transfer size units (4bytes here) */
-    return (HDMA_CCNT0 & 0xffff)<<2;
-}
-
 /* audio DMA ISR called when chunk from callers buffer has been transfered */
 void INT_HDMA(void)
 {

firmware/target/arm/s3c2440/gigabeat-fx/pcm-meg-fx.c

@@ -220,12 +220,6 @@ void fiq_handler(void)
     pcm_play_dma_status_callback(PCM_DMAST_STARTED);
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    /* lie a little and only return full pairs */
-    return (DSTAT2 & 0xFFFFE) * 2;
-}
-
 const void * pcm_play_dma_get_peak_buffer(int *count)
 {
     unsigned long addr = DCSRC2;

firmware/target/arm/s3c2440/mini2440/pcm-mini2440.c

@@ -260,12 +260,6 @@ void fiq_handler(void)
     pcm_play_dma_status_callback(PCM_DMAST_STARTED);
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    /* lie a little and only return full pairs */
-    return (DSTAT2 & 0xFFFFE) * 2;
-}
-
 const void * pcm_play_dma_get_peak_buffer(int *count)
 {
     unsigned long addr = DCSRC2;

firmware/target/arm/s5l8700/pcm-s5l8700.c

@@ -259,12 +259,7 @@ void pcm_play_dma_postinit(void)
 /* set the configured PCM frequency */
 void pcm_dma_apply_settings(void)
 {
-    pcm_dma_set_freq(pcm_fsel);    
-}
-
-size_t pcm_get_bytes_waiting(void)
-{
-    return (nextsize + DMACTCNT0 + 2) << 1;
+    pcm_dma_set_freq(pcm_fsel);
 }
 
 const void * pcm_play_dma_get_peak_buffer(int *count)

firmware/target/arm/s5l8702/pcm-s5l8702.c

@@ -216,13 +216,6 @@ void pcm_play_dma_postinit(void)
     audiohw_postinit();
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    size_t total_bytes;
-    dmac_ch_get_info(&dma_play_ch, NULL, &total_bytes);
-    return total_bytes;
-}
-
 const void* pcm_play_dma_get_peak_buffer(int *count)
 {
     void *addr = dmac_ch_get_info(&dma_play_ch, count, NULL);

firmware/target/arm/tms320dm320/creative-zvm/pcm-creativezvm.c

@@ -84,8 +84,3 @@ void pcm_play_unlock(void)
 {
 
 }
-
-size_t pcm_get_bytes_waiting(void)
-{
-    return 0;
-}

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

@@ -120,11 +120,6 @@ void pcm_play_unlock(void)
 
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    return DSP_(_sdem_dsp_size)-DSP_(_sdem_level);
-}
-
 /* Only used when debugging */
 static char buffer[80];
 

firmware/target/arm/tms320dm320/sansa-connect/pcm-sansaconnect.c

@@ -127,11 +127,6 @@ void pcm_play_unlock(void)
 
 }
 
-size_t pcm_get_bytes_waiting(void)
-{
-    return DSP_(_sdem_dsp_size)-DSP_(_sdem_level);
-}
-
 /* Only used when debugging */
 static char buffer[80];