TLV320ADC3140: Configuration and Kernel Errors

Kindly offer me the kernel version. try regmap_update_bits instead of snd_soc_component_update_bits 

I'm running the most recent Raspberry Pi version `bookworm`, running this kernel:

$ uname -a
Linux workshop-coelbe-jonas 6.1.0-rpi8-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.73-1+rpt1 (2024-01-25) aarch64 GNU/Linux

If you still met this issue, I suggest use this code lpaa-android-drivers/pcmdevice-linux-driver - Unnamed repository; edit this file 'description' to name the repository.

The error remains, even after replacing all calls with regmap_update_bits. I'll now checkout the new implementation. 

The first issues I've encountered compiling the module were some kernel version dependencies, which turn out to be different for the Raspberry Pi Kernel, since that is a fork. I've worked around it by altering the if macros (version 6.2.0 to 6.1.0 in this case) at the respective failing locations, e.g.

#if KERNEL_VERSION(6, 1, 0) <= LINUX_VERSION_CODE
		FW_ACTION_UEVENT
#else
		FW_ACTION_HOTPLUG
#endif

Second issue was the device tree overlay. I've tried to load the one which is provided with the repository (genericstereoaudiocodec.dts), which does not compile. The overlay I came up with looks like this:

/dts-v1/;
/plugin/;

/ {
    compatible = "brcm,bcm2708";

    fragment@0 {
        target = <&sound>;
        __overlay__ {
            compatible = "simple-audio-card";
            simple-audio-card,name = "TI";
            status="okay";

            capture_link: simple-audio-card,dai-link@0 {
                format = "i2s";

                // Set RasPi to I2S slave
                bitclock-master = <&r_codec_dai>;
                frame-master = <&r_codec_dai>;

                r_cpu_dai: cpu {
                    sound-dai = <&i2s>;
                    // TDM slot configuration for stereo
                    dai-tdm-slot-num = <2>;
                    dai-tdm-slot-width = <32>;
                };

                r_codec_dai: codec {
                    sound-dai = <&codec_in>;
                };
            };
        };
    };

    fragment@1 {
        target = <&i2c1>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            status = "okay";

            codec_in: adc3140@4c {
                compatible = "ti,adc3140";
				reg = <0x4c>;
                reset-gpios = <&gpio 4 0>;

                #address-cells = <1>;
                #size-cells = <0>;
                #sound-dai-cells = <0>;
                status = "okay";

            };
        };
    };

    fragment@2 {
        target = <&i2s>;
        __overlay__ {
            #sound-dai-cells = <0>;
            status = "okay";
        };
    };
};

The codec driver seems to be loaded, however there are again error messages in the kernel log when initializing the device:

[    3.966342] pcmdevice-codec 1-004c: primary-device = 0x4c
[    3.966384] pcmdevice-codec 1-004c: Looking up irq-gpio property failed -22
[    3.967219] pcmdevice-codec 1-004c: Direct firmware load for adc3140-1dev-reg.bin failed with error -2
[    3.968047] pcmdevice-codec 1-004c: Failed to read adc3140-1dev-reg.bin, no side-effect on driver running
[    3.968070] pcmdevice-codec 1-004c: Firmware init complete

When trying to record samples, the following kernel messages appear, and recording is not successful:

[  112.402622] pcmdevice-codec 1-004c: pcmdevice_hw_params: Capture
[  112.402641] pcmdevice-codec 1-004c: pcmdevice_hw_params: BCLK rate = 2116800 Channel = 2Sample rate = 44100 slot width = 24
[  112.402947] bcm2835-i2s fe203000.i2s: I2S SYNC error!
[  112.403125] pcmdevice-codec 1-004c: conf_no should be less than 0

Any hints from your side?

Download the adc3140-1dev-reg.json from this link

jsn - lpaa-android-drivers/pcmdevice-linux-driver - Unnamed repository; edit this file 'description' to name the repository.

And download the regbin tool and tool guideline document here.

tool - lpaa-android-drivers/pcmdevice-linux-driver - Unnamed repository; edit this file 'description' to name the repository. 

convert json file to bin file.

Thank's for the hint. I had no windows at hand, so I've tried using wine, which failed. After that I've installed windows, which also failed:

tool/regbin_parser.exe -i jsn/adc3140-1dev-reg.json
File size not match, 8859 2064261152
main Bin loading requested: 0

I don't quite understand the error output, what's the deal here?

Hi Guy

regbin_parser.exe is the parsing tool for the bin file.

You must use the Non_Integrated_Bin_Tool_1.3.7.zip to convert jason file to bin file

Ah, I See. Reading the Guideline also helped quite a bit... Sorry. The firmware is now loaded, however it still didn't do the trick. When loading the module, these firmware get's loaded correctly, I assume:

[    3.700094] pcmdevice-codec 1-004c: primary-device = 0x4c
[    3.700129] pcmdevice-codec 1-004c: Looking up irq-gpio property failed -22
[    3.701675] pcmdevice-codec 1-004c: pcmdev: regbin_ready start
[    3.701693] pcmdevice-codec 1-004c: ndev = 1
[    3.701697] pcmdevice-codec 1-004c: nconfig = 2
[    3.701701] pcmdevice-codec 1-004c: img_sz = 540 total_config_sz = 248 offset = 292
[    3.701820] pcmdevice-codec 1-004c: Firmware init complete

Still, when trying recordings, it just results in Input/output errors:

$ arecord -f S24_LE -D "hw:0" -c2 -r 48000                             
Recording WAVE 'stdin' : Signed 24 bit Little Endian, Rate 48000 Hz, Stereo
RIFF$?WAVEfmt ??data?arecord: pcm_read:2221: read error: Input/output error

And this respective kernel messages:

[ 3277.752317] pcmdevice-codec 1-004c: pcmdevice_hw_params: Capture
[ 3277.752335] pcmdevice-codec 1-004c: pcmdevice_hw_params: BCLK rate = 2304000 Channel = 2Sample rate = 48000 slot width = 24
[ 3277.752639] bcm2835-i2s fe203000.i2s: I2S SYNC error!
[ 3277.752817] pcmdevice-codec 1-004c: select_cfg_blk: profile_conf_id = 0
[ 3277.752822] pcmdevice-codec 1-004c: select_cfg_blk: conf 0, block type:PRE_POWER_UP	 device idx = 0x00
[ 3287.806239] pcmdevice-codec 1-004c: select_cfg_blk: profile_conf_id = 0
[ 3287.806257] pcmdevice-codec 1-004c: select_cfg_blk: conf 0, block type:PRE_SHUTDOWN	 device idx = 0x00

Kindly use scope to measure the I2S clk. In your dts, TLV320ADC3140 will be set as a master device, right?

I found the json file in the git.ti.com maybe do not match your requirement. Can you list your audio spec wanted to record? such as sample rate, bitwidth, bck clk and MClK. Thanks.

In the current DTS ADC314 is set as master device, yes. I've measured using the scope and do not see any clock signal on BCLK or FSYNC. 

The concrete configuration doesn't matter too much right now, I just want to get the ADC3140EMV-PDK running with the onboard analog microphone as a quick prototype. So if another configuration works out of the box, that would also be fine. 

I have transferred your request to our hardware experts. They will support you. If you want to get  ADC3140EMV-PDK, I think you will purchase one from www.ti.com.

I have bought the ADC3140EMV-PDK. I'm just using the upper part of the system containing the TLV320ADC3140 and I'm wiring this board to the Raspberry Pi using the test points on the board. I don't think that the hardware is an issue here. 

Wiring should be straight forward, so I'm also pretty sure there's nothing wrong there, just to make sure:

• RPi GPIO 2 (SDA) <> ADC3140 SDA
• RPi GPIO 3 (SCL) <> ADC3140 SCL
• RPi GPIO 4 <> ADC3140 SHDNz (reset)
• RPi GPIO 18 (I2S CLK) <> ADC3140 BCLK
• RPi GPIO 19 (I2S FS) <> ADC3140 FSYNC
• RPi GPIO 20 (DIN) <> ADC3140 DOUT

Is there another way I confirm communication with the chip is functional?