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";
};
};
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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