RZ-G/RZ-G2L Flash Programming: Difference between revisions
(Created page with " RZ/G2L cannot boot from USB, so at the end-of-line there are two/three real viable options: 1) Boot from SCIF. 2) Use JTAG. 3) It is worth to mention that, in general, if a...") |
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RZ/G2L cannot boot from USB, so at the end-of-line there are two/three real viable options: | RZ/G2L cannot boot from USB, so at the end-of-line there are two/three real viable options: | ||
# Boot from SCIF | |||
# Use JTAG. | |||
# It is worth to mention that, in general, if a QSPI FLASH is present on the custom board, it can also be bought preprogrammed. | |||
In any of the cases above the goal is to have U-Boot up and running, then there are plenty of options to program the rootfs: ethernet, USB as host, USB with Mass Storage gadget, etc. | In any of the cases above the goal is to have U-Boot up and running, then there are plenty of options to program the rootfs: ethernet, USB as host, USB with Mass Storage gadget, etc. | ||
With option 1), you can download the flash writer and program the bootloaders (ATF and U-Boot) into QSPI / eMMC boot partition, then reset and run U-Boot. | With option 1), you can download the flash writer and program the bootloaders (ATF and U-Boot) into QSPI / eMMC boot partition, then reset and run U-Boot. | ||
With option 2), you can download ATF and U-Boot via JTAG and then run the boot loaders without having to initially program them. Once U-Boot runs, you can program both bootloaders and rootfs. | With option 2), you can download ATF and U-Boot via JTAG and then run the boot loaders without having to initially program them. Once U-Boot runs, you can program both bootloaders and rootfs. | ||
With option 3), QSPI has already bootloaders pre-programmed, so U-Boot is already available. | With option 3), QSPI has already bootloaders pre-programmed, so U-Boot is already available. | ||
All the options above may not require any human intervention and can be to a certain extent automatized. | All the options above may not require any human intervention and can be to a certain extent automatized. | ||
Revision as of 06:50, 21 July 2021
RZ/G2L cannot boot from USB, so at the end-of-line there are two/three real viable options:
- Boot from SCIF
- Use JTAG.
- It is worth to mention that, in general, if a QSPI FLASH is present on the custom board, it can also be bought preprogrammed.
In any of the cases above the goal is to have U-Boot up and running, then there are plenty of options to program the rootfs: ethernet, USB as host, USB with Mass Storage gadget, etc.
With option 1), you can download the flash writer and program the bootloaders (ATF and U-Boot) into QSPI / eMMC boot partition, then reset and run U-Boot.
With option 2), you can download ATF and U-Boot via JTAG and then run the boot loaders without having to initially program them. Once U-Boot runs, you can program both bootloaders and rootfs.
With option 3), QSPI has already bootloaders pre-programmed, so U-Boot is already available.
All the options above may not require any human intervention and can be to a certain extent automatized.