/***************************************************************************//**
* @brief Sets the value of the data clock.
*
* @param conv - Pointer to a cf_axi_dds_converter struct
* @param freq - Data clock value
*
* @return Returns negative error code or 0 in case of success.
*******************************************************************************/
static int32_t ad9122_set_data_clk(struct cf_axi_dds_converter *conv, uint32_t freq)
{
uint32_t dac_freq;
int32_t dat_freq, r_dac_freq;
int64_t ret;
dat_freq = pfnRoundRateDataClk(freq);
if (dat_freq < 0 || dat_freq > AD9122_MAX_DAC_RATE) {
#ifdef CLK_DEBUG
xil_printf("CLK_DATA: Error or requested rate exceeds maximum %ld (%lu)",
dat_freq, AD9122_MAX_DAC_RATE);
#endif
return -1;
}
dac_freq = dat_freq * conv->interp_factor;
if (dac_freq > AD9122_MAX_DAC_RATE) {
#ifdef CLK_DEBUG
xil_printf("CLK_DAC: Requested Rate exceeds maximum %lu (%lu)",
dac_freq, AD9122_MAX_DAC_RATE);
#endif
return -1;
}
r_dac_freq = pfnRoundRateDacClk(dac_freq);
if (r_dac_freq != dac_freq) {
#ifdef CLK_DEBUG
xil_printf("CLK_DAC: Requested Rate mismatch %ld (%lu)",
r_dac_freq, dac_freq);
#endif
return -1;
}
ret = pfnSetDataClk(dat_freq);
if(ret < 0)
return ret;
conv->clk[CLK_DATA] = (uint32_t)ret;
ret = pfnSetDacClk(dac_freq);
if(ret < 0)
return ret;
conv->clk[CLK_DAC] = (uint32_t)ret;
ad9122_update_avail_fcent_modes(conv, dat_freq);
ad9122_update_avail_intp_modes(conv, dat_freq);
return 0;
}
/***************************************************************************//**
* @brief Updates the available interpolation frequencies list.
*
* @param conv - Pointer to a cf_axi_converter struct
* @param dat_freq - Data clock frequency in Hz
*
* @return None.
*******************************************************************************/
static void ad9122_update_avail_intp_modes(struct cf_axi_converter *conv,
uint32_t dat_freq)
{
uint32_t dac_freq;
int32_t r_dac_freq;
int32_t intp, i;
for (i = 0, intp = 1; intp <= 8; intp *= 2) {
dac_freq = dat_freq * intp;
if (dac_freq > AD9122_MAX_DAC_RATE) {
break;
}
r_dac_freq = pfnRoundRateDacClk(dac_freq);
if (r_dac_freq != dac_freq)
continue;
else
conv->intp_modes[i++] = dac_freq;
}
conv->intp_modes[i] = 0;
}
