From: <[email protected]>
Reply-To: "[email protected]" <[email protected]>
Date: Thursday, November 13, 2014 at 5:46 PM
To: "[email protected]" <[email protected]>
Cc: <[email protected]>
Subject: [beagleboard] Custom Beaglebone black Audio cape with
TLV320AIC3110
> Hi,
>
> I am trying to design a cape with TLV320AIC3110 for Beaglebone black using
> I2c2 and Mcasp0. I have compiled the driver into the kernel and modified the
> device tree. This is my procedure.
>
> ubuntu@arm:~$ uname -r
> 3.15.10-bone8
>
> 1- Driver:
> I am using the driver in /sound/soc/codecs/tlc320aic31xx.c
> diff --git a/sound/soc/codecs/tlv320aic31xx.c
> b/sound/soc/codecs/tlv320aic31xx.c
> index d1929de..1c300a5 100644
> --- a/sound/soc/codecs/tlv320aic31xx.c
> +++ b/sound/soc/codecs/tlv320aic31xx.c
> @@ -19,7 +19,7 @@
> * high performance codec which provides a stereo DAC, a mono ADC,
> * and mono/stereo Class-D speaker driver.
> */
> -
> +#define DEBUG
> #include <linux/module.h>
> #include <linux/moduleparam.h>
> #include <linux/init.h>
>
> 2- Edit Kconfig
> diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
> index f0e8401..19036e3 100644
> --- a/sound/soc/codecs/Kconfig
> +++ b/sound/soc/codecs/Kconfig
> @@ -461,7 +461,8 @@ config SND_SOC_TLV320AIC26
> depends on SPI
>
> config SND_SOC_TLV320AIC31XX
> - tristate
> + tristate "TI TLV320AIC31xx class D codecs"
> + depends on I2C
>
> config SND_SOC_TLV320AIC32X4
> tristate
>
>
> 3- ALSA Machine Layer Configuration:
> Create a DAI (digital audio interface) Link structure. This should allow a
> specific configuration for the McASP to be called when Linux is directed to
> play audio to the TLV320AIC31XX. For Sitara McASP machine layer driver is
> found at sound/soc/davinci/davinci-evm.c
>
> diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
> index cab98a5..41db457 100644
> --- a/sound/soc/davinci/davinci-evm.c
> +++ b/sound/soc/davinci/davinci-evm.c
> @@ -8,7 +8,7 @@
> * it under the terms of the GNU General Public License version 2 as
> * published by the Free Software Foundation.
> */
> -
> +#define DEBUG
> #include <linux/module.h>
> #include <linux/moduleparam.h>
> #include <linux/timer.h>
> @@ -98,6 +98,13 @@ static const struct snd_soc_dapm_widget
> aic3x_dapm_widgets[]
> SND_SOC_DAPM_LINE("Line In", NULL),
> };
>
> +static const struct snd_soc_dapm_widget aic31xx_dapm_widgets[] = {
> + SND_SOC_DAPM_HP("Headphone Jack", NULL),
> + SND_SOC_DAPM_SPK("Speaker", NULL),
> + SND_SOC_DAPM_MIC("Mic Jack", NULL),
> +};
> +
> +
> /* davinci-evm machine audio_mapnections to the codec pins */
> static const struct snd_soc_dapm_route audio_map[] = {
> /* Headphone connected to HPLOUT, HPROUT */
> @@ -120,6 +127,7 @@ static const struct snd_soc_dapm_route audio_map[] = {
> {"LINE2R", NULL, "Line In"},
> };
>
> +
> /* Logic for a aic3x as connected on a davinci-evm */
> static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
> {
> @@ -150,6 +158,42 @@ static int evm_aic3x_init(struct snd_soc_pcm_runtime
> *rtd)
> return 0;
> }
>
> +/* Logic for a aic31xx as connected on a davinci-evm */
> +static int evm_aic31xx_init (struct snd_soc_pcm_runtime *rtd)
> +{
> + struct snd_soc_codec *codec = rtd->codec;
> + struct snd_soc_dapm_context *dapm = &codec->dapm;
> + struct device_node *np = codec->card->dev->of_node;
> + int ret;
> +
> + /* Add davinci-evm specific widgets */
> + snd_soc_dapm_new_controls(dapm, aic31xx_dapm_widgets,
> + ARRAY_SIZE(aic31xx_dapm_widgets));
> +
> + if (np) {
> + ret = snd_soc_of_parse_audio_routing(codec->card,
> "ti,audio-rou
> + if (ret)
> + return ret;
> + }
> +/*
> +else {
> +*/
> + /* Set up davinci-evm specific audio path audio_map */
> +/*
> + snd_soc_dapm_add_routes(&card->dapm, audio_map,
> + ARRAY_SIZE(audio_map));
> + }
> +*/
> + /* not connected */
> + /* snd_soc_dapm_nc_pin(&codec->dapm, "MONO_LOUT");
> + snd_soc_dapm_nc_pin(&codec->dapm, "HPLCOM");
> + snd_soc_dapm_nc_pin(&codec->dapm, "HPRCOM");
> +*/
> + return 0;
> +}
> +
> +
> +
> /* davinci-evm digital audio interface glue - connects codec <--> CPU */
> static struct snd_soc_dai_link dm6446_evm_dai = {
> .name = "TLV320AIC3X",
> @@ -250,6 +294,8 @@ static struct snd_soc_dai_link da850_evm_dai = {
> SND_SOC_DAIFMT_IB_NF,
> };
>
> +
> +
> /* davinci dm6446 evm audio machine driver */
> /*
> * ASP0 in DM6446 EVM is clocked by U55, as configured by
> @@ -343,16 +389,33 @@ static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
> .stream_name = "AIC3X",
> .codec_dai_name = "tlv320aic3x-hifi",
> .ops = &evm_ops,
> - .init = evm_aic3x_init,
> + .init = evm_aic3x_init,
> .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
> SND_SOC_DAIFMT_IB_NF,
> };
> +/*Modified evm_dai_tlv320aic3x() for aic3110 */
> +static struct snd_soc_dai_link evm_dai_tlv320aic3110 = {
> + .name = "TLV320AIC3110",
> + .stream_name = "AIC3110", /* What should I put here? */
> + .codec_dai_name = "tlv320aic31xx-hifi",
> + .ops = &evm_ops,
> + .init = evm_aic31xx_init,
> + .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
> + SND_SOC_DAIFMT_IB_NF,
> +};
>
> static const struct of_device_id davinci_evm_dt_ids[] = {
> {
> .compatible = "ti,da830-evm-audio",
> - .data = (void *) &evm_dai_tlv320aic3x,
> + .data = (void *) &evm_dai_tlv320aic3x,
> +/* .data = (void *) &evm_dai_tlv320aic3110,*/
> },
> +
> + {
> + .compatible = "ti,TLV320AIC3110-audio",
> + .data = (void *) &evm_dai_tlv320aic3110,
> + },
> +
> { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
>
>
> 4-Add TLV320AIC3110_SOC_EVM build option.
> --- a/sound/soc/davinci/Kconfig
> +++ b/sound/soc/davinci/Kconfig
> @@ -13,7 +13,7 @@ config SND_DAVINCI_SOC_VCIF
>
> config SND_DAVINCI_SOC_GENERIC_EVM
> tristate
> - select SND_SOC_TLV320AIC3X
> + select SND_SOC_TLV320AIC31XX
> select SND_DAVINCI_SOC_MCASP
>
> config SND_AM33XX_SOC_EVM
> @@ -22,7 +22,7 @@ config SND_AM33XX_SOC_EVM
> select SND_DAVINCI_SOC_GENERIC_EVM
> help
> Say Y or M if you want to add support for SoC audio on AM33XX
> - boards using McASP and TLV320AIC3X codec. For example AM335X-EVM,
> + boards using McASP and TLV320AIC31XX codec. For example AM335X-EVM,
> AM335X-EVMSK, and BeagelBone with AudioCape boards have this
> setup.
>
>
>
>
> 5- Adding Device tree entries:
> For Beaglebone Black KERNEL/arch/arm/boot/dts/am335x-boneblack.dts is used so
> we modify it to add the sound card.
> --- a/arch/arm/boot/dts/am335x-boneblack.dts
> +++ b/arch/arm/boot/dts/am335x-boneblack.dts
> @@ -64,6 +64,11 @@
> /* Pins: P9.24, P9.28, P9.29, P9.31, P9.30 */
> /* #include "am335x-bone-audio.dtsi" */
>
> +/*Customized Audio codec TLV320AIC31XX.C */
> +#include "am335x-bone-tlv320aic31xx.dtsi"
> +
> +
> +
> /* http://elinux.org/CircuitCo:BeagleBone_LCD3 */
> /* #include "am335x-bone-lcd3-01-00a2.dtsi" */
>
>
> 6- Create KERNEL/arch/arm/boot/dts/am335x-bone-tlv320aic31xx.dtsi
> #include <dt-bindings/sound/tlv320aic31xx-micbias.h>
>
> &i2c2 {
> tlv320aic3110: tlv320aic3110@18 {
> compatible ="ti,tlv320aic3110" ;
> reg = <0x18>;
> ai31xx-micbias-vg = <1>;
> status = "okay";
> /* Regulators */
> /* This might be eddited */
> HPVDD-supply = <&ldo4_reg>;
> SPRVDD-supply = <&ldo4_reg>;
> SPLVDD-supply = <&ldo4_reg>;
> AVDD-supply = <&ldo4_reg>;
> IOVDD-supply = <&ldo4_reg>;
> DVDD-supply = <&vbat>;
> };
> };
>
> &mcasp0 {
> pinctrl-names = "default";
> pinctrl-0 = <&mcasp0_pins_audio>;
> status = "okay";
> op-mode = <0>; /* MCASP_IIS_MODE */
> tdm-slots = <2>;
> num-serializer = <16>;
> serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
> 2 0 1 0
> 0 0 0 0
> 0 0 0 0
> 0 0 0 0
>> >;
> tx-num-evt = <1>;
> rx-num-evt = <1>;
> };
> / {
> sound {
> compatible = "ti,TLV320AIC3110-audio";
> ti,model = "DA830 EVM";
> ti,audio-codec = <&tlv320aic3110>;
> ti,mcasp-controller = <&mcasp0>;
> ti,codec-clock-rate = <12000000>;
> ti,audio-routing =
> /* Source Sink */
> /* output in driver*/
> /* Speaker connections */
> "Headphone Jack", "HPL",
> "Headphone Jack", "HPR",
> "Speaker", "SPL",
> "Speaker", "SPR",
> "Mic Jack", "MICBIAS",
> /* Microphone connections */
> /* input in driver */
> "MIC1LP", "Mic Jack",
> "MIC1RP", "Mic Jack",
> "MIC1LM", "Mic Jack";
> };
> };
>
If you look at
Documentation/devicetree/bindings/sound/davinci-evm-audio.txt, you will see:
³MIC3L², ³Mic Bias 2V²
³MIC3R², ³Mic Bias 2V²
³Mic Bias 2V², ³Mic Jack"
Regards,
John
>
>
> So at this point everything should be fine and I get sound from the codec. The
> only error that I have is about ai31xx-micbias-vg which cannot be initialized.
> I know that this works but am I doing everything right? I wonder if my
> approach is correct. \
> By the way, the reason I was writing this was that I could not get the codec
> to work but by the time I finished writing this post aic3110 was working:)
> Thanks for reading and your comments
> -Alex
>
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