Hi all,
I have learned Davinci for a short time. I need to sample one channel analog audio signal input from tvp5158 now. I have connected the I2S ports of tvp5158 to McASP4 ports of DM8148. I choose DVRRDK_04.00.00.03 as my development environment. But I find that there is no driver of McASP4 in the Kernel. So I want to add one in it by myself. I imitated McASP2 driver and added many codes. Tvp5158 can output signal through I2S ports in I2S format. I use the driver of tvp5158 in the Kernel and change nothing. I use “arecord” tool of ALSA to record the audio which come from tvp5158. The command is: “arecord -Dplughw:0,0 -r16000 -f S16_LE test.wav”
Unfortunately, I can achieve nothing. I can hear nothing when I play the “test.wav” but noise. Can you help me about this? Whether my method of test or the driver of McASP4 is wrong? I appreciate any help of everyone.
The codes I added or changed:
In arch/arm/plat-omap/include/plat/Asp.h added:
#define TI81XX_ASP4_BASE 0x4A1A8000
#define TI81XX_DMA_MCASP4_AXEVT 62
#define TI81XX_DMA_MCASP4_AREVT 63
#define TI81XX_ASP4_RX_INT TI81XX_IRQ_MCASP4_RX
#define TI81XX_ASP4_TX_INT TI81XX_IRQ_MCASP4_TX
In arch/arm/plat-omap/include/plat/Irqs-ti81xx.h add:
#define TI81XX_IRQ_MCASP4_TX 108
#define TI81XX_IRQ_MCASP4_RX 109
In arch/arm/plat-omap2/Devices.c :
static const s16 ti814x_dma_rsv_chans[][2] = {
/* (offset, number) */
{0, 2},
{14, 2},
{26, 6},
{48, 4},
{56, 6}, //change {56,8} to {56,6}
{-1, -1}
};
static const s16 ti814x_dma_rsv_slots[][2] = {
/* (offset, number) */
{0, 2},
{14, 2},
{26, 6},
{48, 4},
{56, 6}, //change {56,8} to {56,6}
{64, 127},
{248, 264},
{-1, -1}
};
static u8 tvp5158_iis_serializer_direction[] = {
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, INACTIVE_MODE,
};
static struct snd_platform_data tvp5158_snd_data = {
.tx_dma_offset = 0x4A1AB000,//change
.rx_dma_offset = 0x4A1AB000,//change
.asp_chan_q = EVENTQ_0,
.tdm_slots = 2, /* number of channels.*/
.op_mode = DAVINCI_MCASP_IIS_MODE,
.num_serializer = ARRAY_SIZE(tvp5158_iis_serializer_direction),
.serial_dir = tvp5158_iis_serializer_direction,
.version = MCASP_VERSION_2,
.txnumevt = 1,//change 32 to 0
.rxnumevt = 1,// change 32 to 1
};
static struct platform_device ti81xx_mcasp_tvp5158_device = {
.name = "davinci-mcasp", /* driver name */
.id = 4,// change 0 to 4
.dev = {
.platform_data = &tvp5158_snd_data,
},
.num_resources = ARRAY_SIZE(ti81xx_mcasp4_resource),//change
.resource = ti81xx_mcasp4_resource,//change
};
Add these:
static struct resource ti81xx_mcasp4_resource[] = {
{
.name = "mcasp",
.start = TI81XX_ASP4_BASE,
.end = TI81XX_ASP4_BASE + (SZ_1K * 12) - 1,
.flags = IORESOURCE_MEM,
},
/* TX event */
{
.start = TI81XX_DMA_MCASP4_AXEVT,
.end = TI81XX_DMA_MCASP4_AXEVT,
.flags = IORESOURCE_DMA,
},
/* RX event */
{
.start = TI81XX_DMA_MCASP4_AREVT,
.end = TI81XX_DMA_MCASP4_AREVT,
.flags = IORESOURCE_DMA,
},
};
In sound/soc/davinci/Ti81xx-evm.c :
static struct snd_soc_dai_link ti81xx_mcasp_dai[] = {
{
.name = "TVP5158AUDIO",
.stream_name = "TVP-PCM",
.cpu_dai_name= "davinci-mcasp.4",//change "davinci-mcasp.4" to "davinci-mcasp.0"
.codec_dai_name = "tvp5158-hifi",
.platform_name ="davinci-pcm-audio",
.codec_name = "tvp5158-audio",
.ops = &ti81xx_evm_ops,
},
{
.name = "TLV320AIC3X",
.stream_name = "AIC3X",
#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
.codec_dai_name = "tlv320aic3x-hifi",
.codec_name = "tlv320aic3x-codec.1-0018",
.platform_name = "davinci-pcm-audio",
.init = ti81xx_evm_aic3x_init,
.ops = &ti81xx_evm_ops,
},
};
In Board-ti8148evm.c added:
TI814X_MUX(MCASP4_CLKX, OMAP_MUX_MODE0), // Set up pin as McASP4_ACLKX.
TI814X_MUX(MCASP4_FSX, OMAP_MUX_MODE0), //Set up pin as McASP4_AFSX.
TI814X_MUX(MCASP4_AXR0, OMAP_MUX_MODE0), // Set up pin as McASP4_AXR0.
In Davinci-mcasp.c :
static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
{
.name = "davinci-mcasp.0",
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = DAVINCI_MCASP_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.channels_min = 2,
#if defined(CONFIG_SND_TI81XX_SOC_UDDVR) || defined(CONFIG_SND_TI81XX_SOC_EVM)
.channels_max = 16,
#else
.channels_max = 2,
#endif
.rates = DAVINCI_MCASP_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &davinci_mcasp_dai_ops,
},
{
"davinci-mcasp.1",
.playback = {
.channels_min = 1,
.channels_max = 384,
.rates = DAVINCI_MCASP_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &davinci_mcasp_dai_ops,
},
/*add*/
{
.name = "davinci-mcasp.4",
.capture = {
.channels_min = 2,
.channels_max = 16,.
.rates = DAVINCI_MCASP_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &davinci_mcasp_dai_ops,
},
/*end*/
};
The configuration of tvp5158:
0xfe:0x01 choose the first channel
0xc0:0x00 audio sample rate is 16KHz
0xc4:0x01 Audio Mixer Select
0xc8:0x00 standalone operation
0xc3:0x68 SD_R output，I2S Master，64fS, 16bit PCM
0xfe:0x01 choose the first channel
0xc1:0x88 Volume 0db
0xc2:0x88 Volume 0db
0xc5:0x00 close the muter
