static int aml_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct aml_runtime_data *prtd = runtime->private_data;
audio_stream_t *s = &prtd->s;
int iec958 = 0;
if(prtd == 0)
return 0;
switch(runtime->rate){
case 192000:
s->sample_rate = AUDIO_CLK_FREQ_192;
break;
case 176400:
s->sample_rate = AUDIO_CLK_FREQ_1764;
break;
case 96000:
s->sample_rate = AUDIO_CLK_FREQ_96;
break;
case 88200:
s->sample_rate = AUDIO_CLK_FREQ_882;
break;
case 48000:
s->sample_rate = AUDIO_CLK_FREQ_48;
iec958 = 2;
break;
case 44100:
s->sample_rate = AUDIO_CLK_FREQ_441;
iec958 = 0;
break;
case 32000:
s->sample_rate = AUDIO_CLK_FREQ_32;
iec958 = 3;
break;
case 8000:
s->sample_rate = AUDIO_CLK_FREQ_8;
break;
case 11025:
s->sample_rate = AUDIO_CLK_FREQ_11;
break;
case 16000:
s->sample_rate = AUDIO_CLK_FREQ_16;
break;
case 22050:
s->sample_rate = AUDIO_CLK_FREQ_22;
break;
case 12000:
s->sample_rate = AUDIO_CLK_FREQ_12;
break;
case 24000:
s->sample_rate = AUDIO_CLK_FREQ_22;
break;
default:
s->sample_rate = AUDIO_CLK_FREQ_441;
break;
};
// iec958 and i2s clock are separated since M8
#if MESON_CPU_TYPE < MESON_CPU_TYPE_MESON8
audio_set_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_util_set_dac_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
#else
audio_set_i2s_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_set_958_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_util_set_dac_i2s_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
audio_util_set_dac_958_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
#endif
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK){
trigger_underun = 0;
aml_hw_i2s_init(runtime);
aml_hw_iec958_init(substream);
}
else{
//printk("aml_pcm_prepare SNDRV_PCM_STREAM_CAPTURE: dma_addr=%x, dma_bytes=%x\n", runtime->dma_addr, runtime->dma_bytes);
audio_in_i2s_set_buf(runtime->dma_addr, runtime->dma_bytes*2,audioin_mode);
memset((void*)runtime->dma_area,0,runtime->dma_bytes*2);
{
int * ppp = (int*)(runtime->dma_area+runtime->dma_bytes*2-8);
ppp[0] = 0x78787878;
ppp[1] = 0x78787878;
}
}
if( IEC958_MODE == AIU_958_MODE_PCM_RAW){
if(IEC958_mode_codec == 4 ){ // need Over clock for dd+
WRITE_MPEG_REG_BITS(AIU_CLK_CTRL, 0, 4, 2); // 4x than i2s
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_DOBLY_DIGITAL_PLUS, substream);
}else if(IEC958_mode_codec == 3 ||IEC958_mode_codec == 1 ){ // no-over clock for dts pcm mode
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_DTS, substream);
}
else //dd
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_AC_3, substream);
}else if(IEC958_mode_codec == 1){
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_DTS, substream);
}else{
audio_notify_hdmi_info(AOUT_EVENT_IEC_60958_PCM, substream);
}
#if 0
printk("Audio Parameters:\n");
printk("\tsample rate: %d\n", runtime->rate);
printk("\tchannel: %d\n", runtime->channels);
printk("\tsample bits: %d\n", runtime->sample_bits);
printk("\tformat: %s\n", snd_pcm_format_name(runtime->format));
printk("\tperiod size: %ld\n", runtime->period_size);
printk("\tperiods: %d\n", runtime->periods);
printk("\tiec958 mode: %d, raw=%d, codec=%d\n", IEC958_MODE, IEC958_mode_raw, IEC958_mode_codec);
#endif
return 0;
}
static int aml_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct aml_runtime_data *prtd = runtime->private_data;
audio_stream_t *s = &prtd->s;
int iec958 = 0;
if(prtd == 0)
return 0;
switch(runtime->rate){
case 192000:
s->sample_rate = AUDIO_CLK_FREQ_192;
break;
case 176400:
s->sample_rate = AUDIO_CLK_FREQ_1764;
break;
case 96000:
s->sample_rate = AUDIO_CLK_FREQ_96;
break;
case 88200:
s->sample_rate = AUDIO_CLK_FREQ_882;
break;
case 48000:
s->sample_rate = AUDIO_CLK_FREQ_48;
iec958 = 2;
break;
case 44100:
s->sample_rate = AUDIO_CLK_FREQ_441;
iec958 = 0;
break;
case 32000:
s->sample_rate = AUDIO_CLK_FREQ_32;
iec958 = 3;
break;
case 8000:
s->sample_rate = AUDIO_CLK_FREQ_8;
break;
case 11025:
s->sample_rate = AUDIO_CLK_FREQ_11;
break;
case 16000:
s->sample_rate = AUDIO_CLK_FREQ_16;
break;
case 22050:
s->sample_rate = AUDIO_CLK_FREQ_22;
break;
case 12000:
s->sample_rate = AUDIO_CLK_FREQ_12;
break;
case 24000:
s->sample_rate = AUDIO_CLK_FREQ_22;
break;
default:
s->sample_rate = AUDIO_CLK_FREQ_441;
break;
};
audio_set_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_util_set_dac_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK){
aml_hw_i2s_init(runtime);
aml_hw_iec958_init();
}
else{
//printk("aml_pcm_prepare SNDRV_PCM_STREAM_CAPTURE: dma_addr=%x, dma_bytes=%x\n", runtime->dma_addr, runtime->dma_bytes);
audio_in_i2s_set_buf(runtime->dma_addr, runtime->dma_bytes*2);
memset((void*)runtime->dma_area,0,runtime->dma_bytes*2);
{
int * ppp = (int*)(runtime->dma_area+runtime->dma_bytes*2-8);
ppp[0] = 0x78787878;
ppp[1] = 0x78787878;
}
}
aout_notifier_call_chain(AOUT_EVENT_PREPARE, substream);
if( IEC958_MODE == AIU_958_MODE_PCM_RAW)
aout_notifier_call_chain(AOUT_EVENT_RAWDATA_AC_3, substream);
if( IEC958_MODE == AIU_958_MODE_RAW)
aout_notifier_call_chain(AOUT_EVENT_RAWDATA_DTS, substream);
#if 0
printk("Audio Parameters:\n");
printk("\tsample rate: %d\n", runtime->rate);
printk("\tchannel: %d\n", runtime->channels);
printk("\tsample bits: %d\n", runtime->sample_bits);
printk("\tformat: %s\n", snd_pcm_format_name(runtime->format));
printk("\tperiod size: %ld\n", runtime->period_size);
printk("\tperiods: %d\n", runtime->periods);
printk("\tiec958 mode: %d, raw=%d, codec=%d\n", IEC958_MODE, IEC958_mode_raw, IEC958_mode_codec);
#endif
return 0;
}
