Quectel LTE Module Series User Manual

LTE Module Series
SC20 Secure Boot User Guide
SC20_Secure_Boot_User_Guide Confidential / Released 14 / 15
6 Download Image via QFIL
When using QFIL for image downloading under emergency download mode on SC20, it will return an
error to indicate download failure.
 Reason
The technical reason is that there is no native (.exe/dll) available that would sign digest table; therefore,
QFIL will not be able to operate in VIP mode.
QFIL team would develop a tool which can support VIP mode when the signing tool that would work in
windows environment is ready. Currently it's not ready.
 Temporary solution
The following solution can be temporarily used by customers when they use QFIL to download images to
SC20.
Make the following file modifications first, then rebuilt “prog_emmc_firehose_8909_ddr.mbn”, and finally
sign the image. Use the signed image for downloading, the downloading will be successful.
File Paths:
boot_images\core\storage\tools\deviceprogrammer_ddr\src\firehose\deviceprogrammer_initialize.c
boot_images\core\storage\tools\deviceprogrammer\src\firehose\emmc\deviceprogrammer_initialize.c
// In function void deviceprogrammer_init_hw()
+/* comment out - start
#ifndef SKIP_SECBOOT_CHECK_NOT_RECOMMENDED_BY_QUALCOMM
// The check below is used to ensure that only VIP programmer is run on secure boot devices
// In other words, signing the non-VIP programmer is NOT recommended
if (FALSE == isValidationMode() && TRUE == isAuthenticationEnabled()) { strlcat(err_log, "Secure boot
detected. VIP not enabled:fail ", sizeof(err_log)); }
#endif
+ comment out - end */
Quectel
Confidential

Quectel LTE Module Series Specifications

General

Brand	Quectel
Model	LTE Module Series
Category	Control Unit
Language	English