Hi,
2025년 11월 25일 (화) 05:47, Sam Protsenko <[email protected]>님이 작성: > Hi Minkyu, > > If there are no objections, can you please apply this series to your tree? > > Thanks! > > On Tue, Nov 18, 2025 at 5:21 PM Sam Protsenko > <[email protected]> wrote: > > > > When U-Boot is executed during USB boot [1,2] on E850-96 board, two > > issues happen: > > > > 1. eMMC fails to initialize > > 2. Attempt to use USB PHY driver leads to abort > > > > It was identified that issue #1 happens due to enalbed Flash Memory > > Protector bits in MMC block registers during USB boot, and it's handled > > in patch series [3]. > > > > Issue #2 on the other hand happens because ROM code expects the > > bootloader (U-Boot) to download remaining binaries (LDFW and TZSW) over > > USB using SMC calls. Before that, the access to USB blocks (USB PHY and > > DWC3) is disabled, probably because corresponding TrustZone domains are > > configured for access from Secure World only. > > > > This patch series implements downloading LDFW and TZSW firmware over USB > > during USB boot, which makes it possible to use U-Boot for flashing > > images to eMMC using fastboot and DFU protocols. That in turn simplifies > > the U-Boot development, as one can use `dltool' [1] to run U-Boot binary > > during USB boot, and update U-Boot on eMMC this way (e.g. using DFU). > > It's not possible when using LittleKernel bootloader, as it expects > > non-standard Samsung GPT partition, but in case of U-Boot we use the > > regular one. > > > > Once this patch series and patch series [3] are applied it'll be > > possible to use U-Boot during USB boot. The two series are independent > > of each other, and can be applied in any particular order. > > > > Changes in v3: > > - Added PATCH #6 (enter DFU automatically on USB boot) > > - Rebased on top of the most recent master > > > > Changes in v2: > > - PATCH #4: Return 0 on success in load_image_usb() > > > > [1] https://gitlab.com/LinaroLtd/e850-96/tools/dltool > > [2] https://docs.u-boot.org/en/latest/board/samsung/e850-96.html > > [3] > https://lore.kernel.org/u-boot/[email protected]/ > > > > Sam Protsenko (6): > > board: samsung: e850-96: Keep public functions together > > board: samsung: e850-96: Add routines for checking boot dev > > board: samsung: e850-96: Split LDFW loading and init > > board: samsung: e850-96: Add routine for loading images over USB > > board: samsung: e850-96: Load firmwares over USB on USB boot > > board: samsung: e850-96: Enter DFU automatically on USB boot > > > > board/samsung/e850-96/Makefile | 2 +- > > board/samsung/e850-96/bootdev.c | 99 +++++++++++++++++++++++++++++++++ > > board/samsung/e850-96/bootdev.h | 23 ++++++++ > > board/samsung/e850-96/e850-96.c | 71 ++++++++++++++++++----- > > board/samsung/e850-96/fw.c | 76 ++++++++++++++++++------- > > board/samsung/e850-96/fw.h | 10 +++- > > 6 files changed, 246 insertions(+), 35 deletions(-) > > create mode 100644 board/samsung/e850-96/bootdev.c > > create mode 100644 board/samsung/e850-96/bootdev.h > > > > > > base-commit: 91861e5a30d217d8e70130c9124c1646f4afef29 > > -- > > 2.47.3 > > > applied to u-boot-samsung. Thanks, Minkyu Kang. >
