Hi all
I'm using AM1808 processor and i'm trying to integrate WM8974 mono
audio codec with my host processor but i cant play the music via speaker i
modified the machine driver as follows
I'm connecting WM8974 as slave mode and giving MCLK from external 24.5MHz
crystal.
#define AUDIO_FORMAT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS )
static int evm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0;
unsigned sysclk;
/* ASP1 on DM355 EVM is clocked by an external oscillator */
if (machine_is_davinci_dm355_evm() ||
machine_is_davinci_dm6467_evm() ||
machine_is_davinci_dm365_evm())
sysclk = 27000000;
/* ASP0 in DM6446 EVM is clocked by U55, as configured by
* board-dm644x-evm.c using GPIOs from U18. There are six
* options; here we "know" we use a 48 KHz sample rate.
*/
if (machine_is_omapl138_lcdkboard())
sysclk = 24576000;
else
return -EINVAL;
/* set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
if (ret < 0)
return ret;
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(codec_dai, 0, 1, 24576000,0);
if (ret) {
printk( ">>>couldn't set pll: %d\n", ret);
return ret;
}
return 0;
}
static int evm_spdif_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
/* set cpu DAI configuration */
return snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
}
/*
* Since da850_sdi_shutdown() and da850_sdi_trigger() are invoked in
interrupt
* context, they can't directly invoke da850_sdi_mute(), since
da850_sdi_mute()
* involves i2c communications (which is slow and can wait). So, use the
workqueue
* mechanism to 'finish' processing.
*/
#ifdef CONFIG_MACH_DAVINCI_DA850_SDI
extern int da850_sdi_mute(int state);
static void muteTheOutputs( struct work_struct * work )
{
da850_sdi_mute( 1 );
}
DECLARE_WORK( muteWorkElement, muteTheOutputs );
static void unmuteTheOutputs( struct work_struct * work )
{
da850_sdi_mute( 0 );
}
DECLARE_WORK( unmuteWorkElement, unmuteTheOutputs );
static int da850_sdi_trigger(struct snd_pcm_substream *stream, int cmd)
{
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
schedule_work( &unmuteWorkElement );
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
schedule_work( &muteWorkElement );
break;
}
return 0;
}
static struct snd_soc_ops da850_sdi_ops = {
.hw_params = evm_hw_params,
.trigger = da850_sdi_trigger
};
#endif
static struct snd_soc_ops evm_ops = {
.hw_params = evm_hw_params,
};
static struct snd_soc_ops evm_spdif_ops = {
.hw_params = evm_spdif_hw_params,
};
static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
};
/* davinci-evm machine audio_mapnections to the codec pins */
static const struct snd_soc_dapm_route audio_map[] = {
/* Speaker output mixer */
{"Speaker Mixer", "PCM Playback Switch", "DAC"},
{"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
{"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
/* speaker connected to SPKOUTP */
{"SpkN Out", NULL, "Speaker Mixer"},
{"SpkP Out", NULL, "Speaker Mixer"},
{"SPKOUTN", NULL, "SpkN Out"},
{"SPKOUTP", NULL, "SpkP Out"},
/* Input PGA */
{"Input PGA", "Aux Switch", "Aux Input"},
{"Input PGA", "MicN Switch", "MICN"},
{"Input PGA", "MicP Switch", "MICP"},
};
/* Logic for a aic3x as connected on a davinci-evm */
static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
/* Add davinci-evm specific widgets */
snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
ARRAY_SIZE(aic3x_dapm_widgets));
/* Set up davinci-evm specific audio path audio_map */
snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_enable_pin(dapm, "Ext Spk");
return 0;
}
static struct snd_soc_card da850_snd_soc_card = {
.name = "DA850/OMAP-L138 EVM",
.owner = THIS_MODULE,
.dai_link = &da850_evm_dai,
.num_links = 1,
};
static struct platform_device *evm_snd_device;
static int __init evm_init(void)
{
struct snd_soc_card *evm_snd_dev_data;
int index;
int ret;
if (machine_is_omapl138_lcdkboard()) {
printk("LCDK HAWK board");
evm_snd_dev_data = &da850_snd_soc_card;
index = 0;
} else
return -EINVAL;
evm_snd_device = platform_device_alloc("soc-audio", index);
if (!evm_snd_device)
return -ENOMEM;
platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
ret = platform_device_add(evm_snd_device);
if (ret)
platform_device_put(evm_snd_device);
return ret;
}
static void __exit evm_exit(void)
{
platform_device_unregister(evm_snd_device);
}
module_init(evm_init);
module_exit(evm_exit);
root@omapl138-lcdk:~# amixer cset numid=61 1
numid=61,iface=MIXER,name='Speaker Mixer PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
root@omapl138-lcdk:~# amixer cset numid=46,iface=MIXER,name='Speaker
Playback Vo
lume' 63
numid=46,iface=MIXER,name='Speaker Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=63,step=0
: values=63
| dBscale-min=-57.00dB,step=1.00dB,mute=0
I cant hear anything from my speaker but i can probe the desired clock(MCLK,
WLCK,BCLK) while playing audio by # aplay audio.wav
Even i cant hear the noise from the speaker
Any one help me resolve this
Thanks
Sangly
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