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FMC TDC 1ns 5cha - Software
Commit ebf39881 authored by Tomasz Wlostowski's avatar Tomasz Wlostowski
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kernel: default calibration parameters on EEPROM redaout failure

parent 05f9063b
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Showing with 16 additions and 13 deletions
kernel/calibration.c
View file @ ebf39881
......@@ -69,19 +69,22 @@ int ft_handle_eeprom_calibration(struct fmctdc_dev *ft)
memcpy(calib, &default_calibration, sizeof(struct ft_calibration));
i = ft_read_calibration_eeprom(ft->fmc, raw_calib, sizeof(raw_calib));
/* fixme: there is no calibration validation. Change format? */
/* Translate offsets (they are referenced to channel 0 and in 1/100s of picosecond) to
offsets that could be added to TDC timestamps right away (picoseconds, referenced to WR) */
calib->zero_offset[0] = 0;
for (i = FT_CH_1 + 1; i < FT_NUM_CHANNELS; i++)
calib->zero_offset[i] =
le32_to_cpu(raw_calib[i - 1]) / 100 - calib->zero_offset[0];
calib->vcxo_default_tune = le32_to_cpu(raw_calib[4]);
if(i < 0)
{
dev_err(d, "Failed to read the calibration EEPROM. Using default calibration parameters.\n");
for (i =0; i < FT_NUM_CHANNELS; i++)
calib->zero_offset[i] = 0;
calib->vcxo_default_tune = 32000;
} else {
calib->zero_offset[0] = 0;
for (i = FT_CH_1 + 1; i < FT_NUM_CHANNELS; i++)
calib->zero_offset[i] =
le32_to_cpu(raw_calib[i - 1]) / 100 - calib->zero_offset[0];
calib->vcxo_default_tune = le32_to_cpu(raw_calib[4]);
}
for (i = 0; i < ARRAY_SIZE(calib->zero_offset); i++)
dev_info(d, "calib: zero_offset[%i] = %li\n", i,
(long)calib->zero_offset[i]);
......
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