AD9081 - Odd-numbered FDDCs (FDDC1, FDDC3, FDDC5, and FDDC7) are receiving zero data.

#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <linux/spi/spidev.h>

#include "adi_ad9081.h"
#include "adi_ad9081_hal.h"
#include "adi_cms_api_common.h"

typedef struct {
    int fd;
    const char *node;
    uint32_t speed_hz;
    uint8_t mode;
    uint8_t bits;
} ad9081_spidev_ctx_t;

void ad9081_linux_hal_attach(adi_ad9081_device_t *dev, ad9081_spidev_ctx_t *ctx);

static int die_if_err(const char *tag, int32_t rc)
{
    if (rc != API_CMS_ERROR_OK) {
        printf("FAIL %s rc=%d\n", tag, (int)rc);
        return -1;
    }
    return 0;
}

static void fill_jtx_conv_sel_straight(adi_ad9081_jtx_conv_sel_t *s)
{
    s->virtual_converter0_index = AD9081_FDDC_0_I;
    s->virtual_converter1_index = AD9081_FDDC_0_Q;
    s->virtual_converter2_index = AD9081_FDDC_1_I;
    s->virtual_converter3_index = AD9081_FDDC_1_Q;
    s->virtual_converter4_index = AD9081_FDDC_2_I;
    s->virtual_converter5_index = AD9081_FDDC_2_Q;
    s->virtual_converter6_index = AD9081_FDDC_3_I;
    s->virtual_converter7_index = AD9081_FDDC_3_Q;
    s->virtual_converter8_index = AD9081_FDDC_4_I;
    s->virtual_converter9_index = AD9081_FDDC_4_Q;
    s->virtual_convertera_index = AD9081_FDDC_5_I;
    s->virtual_converterb_index = AD9081_FDDC_5_Q;
    s->virtual_converterc_index = AD9081_FDDC_6_I;
    s->virtual_converterd_index = AD9081_FDDC_6_Q;
    s->virtual_convertere_index = AD9081_FDDC_7_I;
    s->virtual_converterf_index = AD9081_FDDC_7_Q;
}

static void fill_jtx_link0_param_mode12(adi_cms_jesd_param_t *p)
{
    memset(p, 0, sizeof(*p));
    p->jesd_l = 4;
    p->jesd_f = 8;
    p->jesd_m = 16;
    p->jesd_s = 1;
    p->jesd_hd = 0;
    p->jesd_k = 32;
    p->jesd_n = 16;
    p->jesd_np = 16;
    p->jesd_cs = 0;
    p->jesd_subclass = JESD_SUBCLASS_1;
    p->jesd_scr = 0;
    p->jesd_duallink = 0;
    p->jesd_jesdv = 1;      /* JESD204B */
    p->jesd_mode_id = 12;   /* mode12.0 */
    p->jesd_mode_s_sel = 0;
    p->jesd_mode_c2r_en = 0;
    p->jesd_did = 0;
    p->jesd_bid = 0;
    p->jesd_lid0 = 0;
}


int main(void)
{
    adi_ad9081_device_t dev;

    ad9081_spidev_ctx_t ctx = {
        .fd = -1,
        .node = "/dev/spidev0.0",
        .speed_hz = 1000000,
        .mode = (SPI_MODE_0 | SPI_CS_HIGH),
        .bits = 8
    };

    ad9081_linux_hal_attach(&dev, &ctx);

    if (die_if_err("hal_hw_open", adi_ad9081_hal_hw_open(&dev)) < 0) return 1;

    if (die_if_err("soft_reset", adi_ad9081_device_reset(&dev, AD9081_SOFT_RESET)) < 0) return 1;
    if (die_if_err("4wire", adi_ad9081_hal_reg_set(&dev, 0x0000, 0x18)) < 0) return 1;
    if (die_if_err("dev_init", adi_ad9081_device_init(&dev)) < 0) return 1;

    {
        uint64_t dac_clk_hz = 4800000000ULL;
        uint64_t adc_clk_hz = 1600000000ULL;
        uint64_t ref_clk_hz = 4800000000ULL;
        if (die_if_err("clk_cfg",
                       adi_ad9081_device_clk_config_set(&dev, dac_clk_hz, adc_clk_hz, ref_clk_hz)) < 0)
            return 1;
    }

    {
        uint8_t cddcs = AD9081_ADC_CDDC_ALL;
        uint8_t fddcs = AD9081_ADC_FDDC_ALL;

        int64_t cddc_shift[4] = {0, 0, 0, 0};
        int64_t fddc_shift[8] = {1000000LL, 2000000LL, 3000000LL, 4000000LL, 5000000LL, 6000000LL, 7000000LL, 8000000LL};

        uint8_t cddc_dcm[4] = {
            AD9081_CDDC_DCM_2, AD9081_CDDC_DCM_2,
            AD9081_CDDC_DCM_2, AD9081_CDDC_DCM_2
        };
        uint8_t fddc_dcm[8] = {
            AD9081_FDDC_DCM_8, AD9081_FDDC_DCM_8,
            AD9081_FDDC_DCM_8, AD9081_FDDC_DCM_8,
            AD9081_FDDC_DCM_8, AD9081_FDDC_DCM_8,
            AD9081_FDDC_DCM_8, AD9081_FDDC_DCM_8
        };

        uint8_t cc2r_en[4] = {0, 0, 0, 0};
        uint8_t fc2r_en[8] = {0, 0, 0, 0, 0, 0, 0, 0};

        adi_cms_jesd_param_t jtx_param[2];
        memset(jtx_param, 0, sizeof(jtx_param));
        fill_jtx_link0_param_mode12(&jtx_param[0]);

        adi_ad9081_jtx_conv_sel_t jesd_conv_sel[2];
        memset(jesd_conv_sel, 0, sizeof(jesd_conv_sel));
        fill_jtx_conv_sel_straight(&jesd_conv_sel[0]);

        int32_t rc = adi_ad9081_device_startup_rx(&dev,
                                                  cddcs, fddcs,
                                                  cddc_shift, fddc_shift,
                                                  cddc_dcm, fddc_dcm,
                                                  cc2r_en, fc2r_en,
                                                  jtx_param,
                                                  jesd_conv_sel);
        printf("startup_rx rc=%d\n", (int)rc);
        if (die_if_err("startup_rx", rc) < 0) return 1;
    }

    if (die_if_err("coarse_nco_mode_set",
                   adi_ad9081_adc_ddc_coarse_nco_mode_set(&dev, AD9081_ADC_CDDC_ALL, AD9081_ADC_NCO_ZIF)) < 0)
        return 1;

    {
        uint8_t adc_cddc_xbar = (uint8_t)AD9081_ADC_4_ADC_COMP_MODE;

        uint8_t cddc_fddc_xbar = 0;
        cddc_fddc_xbar  =
            AD9081_ADC_CDDC0_TO_FDDC0 |
            AD9081_ADC_CDDC0_TO_FDDC1 |
            AD9081_ADC_CDDC1_TO_FDDC2 |
            AD9081_ADC_CDDC1_TO_FDDC3;

        cddc_fddc_xbar |=
            AD9081_ADC_CDDC2_TO_FDDC4 |
            AD9081_ADC_CDDC2_TO_FDDC5 |
            AD9081_ADC_CDDC3_TO_FDDC6 |
            AD9081_ADC_CDDC3_TO_FDDC7;

        int32_t rc = adi_ad9081_adc_xbar_set(&dev, adc_cddc_xbar, cddc_fddc_xbar);
        printf("adc_xbar_set rc=%d\n", (int)rc);
        if (die_if_err("adc_xbar_set", rc) < 0) return 1;
    }

    {
        uint8_t tx_lane_map[8] = { 3, 2, 4, 5, 6, 7, 0, 1 };
        if (die_if_err("jtx_lanes_xbar",
                       adi_ad9081_jesd_tx_lanes_xbar_set(&dev, AD9081_LINK_0, tx_lane_map)) < 0)
            return 1;
    }

    {
        int32_t rc = adi_ad9081_jesd_oneshot_sync(&dev, JESD_SUBCLASS_1);
        if (rc == API_CMS_ERROR_OK) printf("oneshot:OK\n");
        else printf("oneshot:FAIL rc=%d\n", (int)rc);
    }

    if (die_if_err("jtx_en", adi_ad9081_jesd_tx_link_enable_set(&dev, AD9081_LINK_0, 1)) < 0) return 1;

    (void)adi_ad9081_hal_hw_close(&dev);
    return 0;
}