Hi,
I have customized board on which audio amplifier (TFA9879) is connected on mcasp1 of TI814X. Amplifier output is connected to speaker. No audio codec chip is used.
To make playback running I have added one more sound card, and code is added in file sound/soc/davinci/ti81xx-evm.c as below
----------------------------
1)
/* Initialize dai structured */
static struct snd_soc_dai_link ti81xx_speaker_dai = {
.name = "SPEAKER_SOC_LINK",
.stream_name = "speaker",
.cpu_dai_name = "davinci-mcasp.1",
.platform_name = "davinci-pcm-audio",
.codec_dai_name = "SPEAKER-DAI-CODEC",
.codec_name = "speaker-dummy-codec",
.ops = &ti81xx_evm_ops,
};
2)
/* Initialize sound card structure */
static struct snd_soc_card ti81xx_apeaker_snd_card2 = {
.name = "TI81XX SOUND2",
.dai_link = &ti81xx_speaker_dai,
.num_links = 1,
};
3)
/* Declared the sound card device */
static struct platform_device *ti81xx_pdev2;
4)
/* Created the sound card */
ti81xx_pdev2 = platform_device_alloc("soc-audio", 2);
if (!ti81xx_pdev2) {
platform_device_put(ti81xx_pdev0);
platform_device_put(ti81xx_pdev1);
return -ENOMEM;
}
platform_set_drvdata(ti81xx_pdev2, &ti81xx_ds3_snd_card2);
ret = platform_device_add(ti81xx_pdev2);
if (ret) {
printk(KERN_ERR "Can't add soc platform device\n");
platform_device_put(ti81xx_pdev0);
platform_device_put(ti81xx_pdev1);
platform_device_put(ti81xx_pdev2);
return ret;
}
----------------------------
Dummy codec for speaker is initialized from arch/arm/mach-omap2/board-ti8148evm.c
static struct platform_device ti8148_ds3_dummy_codec_device = {
.name = "speaker-dummy-codec",
.id = -1,
};
static struct platform_device *ti8148_devices[] __initdata = {
&ti8148_hdmi_audio_device,
&ti8148_hdmi_codec_device,
&ti8148_speaker_dummy_codec_device,
----------------------------
mcasp1 is registered in file arch/arm/mach-omap2/devices.c
static u8 speaker_iis_serializer_direction[] = {
TX_MODE, RX_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
};
static struct snd_platform_data ds3_speaker_snd_data = {
.tx_dma_offset = 0x46400000,
.rx_dma_offset = 0x46400000,
.op_mode = DAVINCI_MCASP_IIS_MODE,
.num_serializer = ARRAY_SIZE(ds3_speaker_iis_serializer_direction),
.tdm_slots = 2,
.serial_dir = speaker_iis_serializer_direction,
.asp_chan_q = EVENTQ_2,
.version = MCASP_VERSION_2,
.txnumevt = 1,
.rxnumevt = 1,
};
static struct platform_device speaker_mcasp1_device = {
.name = "davinci-mcasp", /* driver name */
.id = 1,
.dev = {
.platform_data = &speaker_snd_data,
},
.num_resources = ARRAY_SIZE(dm385_mcasp_resource),
.resource = dm385_mcasp_resource,
.resource = dm385_mcasp_resource,
};
void __init ti81xx_register_mcasp(int id, struct snd_platform_data *pdata)
{
if (machine_is_ti8168evm() || machine_is_ti8148evm()
|| machine_is_ti811xevm()) {
ti81xx_mcasp_device.id = 2;
ti81xx_mcasp_device.resource = ti81xx_mcasp_resource;
ti81xx_mcasp_device.num_resources = ARRAY_SIZE(ti81xx_mcasp_resource);
} else if (machine_is_dm385evm()) {
ti81xx_mcasp_device.id = 1;
ti81xx_mcasp_device.resource = dm385_mcasp_resource;
ti81xx_mcasp_device.num_resources = ARRAY_SIZE(dm385_mcasp_resource);
} else {
pr_err("%s: platform not supported\n", __func__);
return;
}
/* TI811x AIC_MCLK is connected to SoC pin MCA2_AHCLKX */
//omap_mux_init_signal("xref_clk2.mcasp2_ahclkx", 0);
ti81xx_mcasp_device.dev.platform_data = pdata;
platform_device_register(&ti81xx_mcasp_device);
#if defined(CONFIG_SND_TI81XX_SOC_EVM)
platform_device_register(&ti81xx_mcasp0_device);
#endif
platform_device_register(&speaker_mcasp1_device);
}
----------------------------
Created on dummy codec as below in file sound/soc/codecs/speaker_dummy_codec.c
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>
static struct snd_soc_codec_driver soc_codec;
static int speaker_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
printk(KERN_INFO "%s : %d\n",__func__,__LINE__);
return 0;
}
static int speaker_mute(struct snd_soc_dai *dai, int mute)
{
printk(KERN_INFO "%s : %d\n",__func__,__LINE__);
return 0;
}
static int speaker_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
printk(KERN_INFO "%s : %d\n",__func__,__LINE__);
return 0;
}
static int speaker_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
printk(KERN_INFO "%s : %d\n",__func__,__LINE__);
return 0;
}
static struct snd_soc_dai_ops speaker_dai_ops = {
.hw_params = speaker_hw_params,
.digital_mute = speaker_mute,
.set_sysclk = speaker_set_dai_sysclk,
.set_fmt = speaker_set_dai_fmt,
};
static struct snd_soc_dai_driver ti8148_speaker_dai = {
.name = "SPEAKER-DAI-CODEC",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 1,
.rates = SNDRV_PCM_RATE_8000
| SNDRV_PCM_RATE_11025
| SNDRV_PCM_RATE_16000
| SNDRV_PCM_RATE_22050
| SNDRV_PCM_RATE_32000
| SNDRV_PCM_RATE_44100
| SNDRV_PCM_RATE_48000
| SNDRV_PCM_RATE_64000
| SNDRV_PCM_RATE_88200
| SNDRV_PCM_RATE_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE
| SNDRV_PCM_FMTBIT_S18_3LE
| SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S24_LE,
},
.ops = &speaker_dai_ops,
.symmetric_rates = 1,
};
static int speaker_codec_probe(struct platform_device *pdev)
{
int ret;
ret = snd_soc_register_codec(&pdev->dev, &soc_codec_speaker,
&ti8148_speaker_dai, 1);
if (ret < 0)
printk(KERN_INFO " Speaker Codec Register Failed\n");
printk(KERN_ALERT "Speaker Dummy Codec Driver Is Probed\n");
return ret;
}
static int speaker_codec_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
static struct platform_driver speaker_codec_driver = {
.probe = speaker_codec_probe,
.remove = speaker_codec_remove,
.driver = {
.name = "speaker-dummy-codec",
.owner = THIS_MODULE,
},
};
static int __init speaker_modinit(void)
{
return platform_driver_register(&speaker_codec_driver);
}
static void __exit speaker_exit(void)
{
platform_driver_unregister(&speaker_codec_driver);
}
module_init(speaker_modinit);
module_exit(speaker_exit);
----------------------------
Output of command
aplay -l is,
**** List of PLAYBACK Hardware Devices ****
card 0: SOUND0 [TI81XX SOUND0], device 1: AIC3X tlv320aic3x-hifi-1 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: SOUND1 [TI81XX SOUND1], device 0: hdmi HDMI-DAI-CODEC-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: SOUND2 [TI81XX SOUND2], device 0: ds3_speaker SPEAKER-DAI-CODEC-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
so, my sound card is created successfully.
==========================
Problem:
Now when I play any raw file using command
aplay -Dplughw:2,0 /home/audio.raw
and prob MCA1_AXR0, MCA1_ACLKX, MCA1_AFSX using oscilloscope, I can not see any activity on this lines.
I want to know,
1) if I can use mcasp1 on DM8148 platform, or not?
2) If yes then, I have done some wrong configuration?
3) arch/arm/mach-omap2/devices.c, there is an explicit condition made, to use MCASP2 only in case of TI814XEVM. Is there any reason for this condition? Following is the condition.
void __init ti81xx_register_mcasp(int id, struct snd_platform_data *pdata)
{
if (machine_is_ti8168evm() || machine_is_ti8148evm()
|| machine_is_ti811xevm()) {
ti81xx_mcasp_device.id = 2;
ti81xx_mcasp_device.resource = ti81xx_mcasp_resource;
ti81xx_mcasp_device.num_resources = ARRAY_SIZE(ti81xx_mcasp_resource);
} else if (machine_is_dm385evm()) {
ti81xx_mcasp_device.id = 1;
ti81xx_mcasp_device.resource = dm385_mcasp_resource;
ti81xx_mcasp_device.num_resources = ARRAY_SIZE(dm385_mcasp_resource);
}
Also, in sound/soc/davinci/ti81xx-evm.c following condition is made to exclude use of MCASP1 in case of 814X.
#if defined(CONFIG_MACH_TI810XEVM) || defined(CONFIG_MACH_TI810XDVR)|| defined (CONFIG_MACH_UD8107_DVR)
.cpu_dai_name= "davinci-mcasp.1",
#else
.cpu_dai_name= "davinci-mcasp.2",
#endif
==========================
Regards,
Dharati Shah
