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Backport 27396 ([manuf] set DIN to all 1s for FPGA devices) #29188

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Merged
pamaury merged 1 commit into from
Jan 31, 2026
Merged

Backport 27396 ([manuf] set DIN to all 1s for FPGA devices) #29188

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6 changes: 4 additions & 2 deletions sw/device/silicon_creator/manuf/lib/individualize.c
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Original file line number Diff line number Diff line change
Expand Up @@ -115,13 +115,15 @@ status_t manuf_individualize_device_hw_cfg(
}

// On non-silicon targets, we expect the CP device ID from flash to be
// empty. In this case we set the HW origin portion of the CP device ID to
// all 1s to indicate this is an FPGA/Sim generated device ID.
// empty. In this case we set the HW origin and DIN portions of the CP
// device ID to all 1s to indicate this is an FPGA/Sim generated device ID.
// Otherwise, we expect the CP device ID to be present and non-zero.
if (flash_cp_device_id_empty) {
if (kDeviceType != kDeviceSilicon && kDeviceType != kDeviceSimDV) {
memset(&cp_device_id, 0, sizeof(cp_device_id));
cp_device_id[0] = UINT32_MAX;
cp_device_id[1] = UINT32_MAX;
cp_device_id[2] = UINT32_MAX;
} else {
return NOT_FOUND();
}
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19 changes: 13 additions & 6 deletions sw/host/provisioning/orchestrator/src/device_id.py
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Original file line number Diff line number Diff line change
Expand Up @@ -83,12 +83,19 @@ def to_int(self) -> int:

@staticmethod
def from_int(din: int) -> "DeviceIdentificationNumber":
year = util.bcd_decode(din & 0xF)
week = util.bcd_decode((din >> 4) & 0xFF)
lot = util.bcd_decode((din >> 12) & 0xFFF)
wafer = util.bcd_decode((din >> 24) & 0xFF)
wafer_x_coord = util.bcd_decode((din >> 32) & 0xFFF)
wafer_y_coord = util.bcd_decode((din >> 44) & 0xFFF)
year = -1
week = -1
lot = -1
wafer = -1
wafer_x_coord = -1
wafer_y_coord = -1
if din != 0xFFFFFFFFFFFFFFFF:
year = util.bcd_decode(din & 0xF)
week = util.bcd_decode((din >> 4) & 0xFF)
lot = util.bcd_decode((din >> 12) & 0xFFF)
wafer = util.bcd_decode((din >> 24) & 0xFF)
wafer_x_coord = util.bcd_decode((din >> 32) & 0xFFF)
wafer_y_coord = util.bcd_decode((din >> 44) & 0xFFF)
return DeviceIdentificationNumber(year=year,
week=week,
lot=lot,
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