/*SoftPLL must be locked prior calling this function*/
static int calib_t24p_slave(uint32_t *value)
{
int rv;
uint32_t prev;
rxts_calibration_start();
while (!(rv = rxts_calibration_update(value)))
/* FIXME: timeout */;
if (rv < 0) {
/* Fall back on master == eeprom-or-error */
return calib_t24p_master(value);
}
/*
* Let's see if we have a matching value in EEPROM:
* accept a 200ps difference, otherwise rewrite eeprom
*/
rv = storage_phtrans(&prev, 0 /* rd */);
if (rv < 0 || (prev < *value - 200) || (prev > *value + 200)) {
rv = storage_phtrans(value, 1);
pp_printf("Wrote new t24p value: %d ps (%s)\n", *value,
rv < 0 ? "Failed" : "Success");
}
return rv;
}
/*SoftPLL must be locked prior calling this function*/
static int calib_t24p_slave(uint32_t *value)
{
int rv;
rxts_calibration_start();
while (!(rv = rxts_calibration_update(value))) ;
if (rv < 0) {
printf("Could not calibrate t24p, trying to read from EEPROM\n");
if(eeprom_phtrans(WRPC_FMC_I2C, FMC_EEPROM_ADR, value, 0) < 0) {
printf("Something went wrong while writing EEPROM\n");
return -1;
}
}
else {
printf("t24p value is %d ps, storing to EEPROM\n", *value);
if(eeprom_phtrans(WRPC_FMC_I2C, FMC_EEPROM_ADR, value, 1) < 0) {
printf("Something went wrong while writing EEPROM\n");
return -1;
}
}
return 0;
}
/* legacy function for 'calibration force' command */
int measure_t24p(uint32_t *value)
{
int rv;
pp_printf("Waiting for link...\n");
while (!ep_link_up(NULL))
timer_delay_ms(100);
spll_init(SPLL_MODE_SLAVE, 0, 1);
pp_printf("Locking PLL...\n");
while (!spll_check_lock(0))
timer_delay_ms(100);
pp_printf("\n");
pp_printf("Calibrating RX timestamper...\n");
rxts_calibration_start();
while (!(rv = rxts_calibration_update(value))) ;
return rv;
}