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![]() Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org> |
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stemmy.c |
ST-Ericsson U8500 Samsung "stemmy" board ======================================== The "stemmy" board supports Samsung smartphones released with the ST-Ericsson NovaThor U8500 SoC, e.g. - Samsung Galaxy S III mini (GT-I8190) "golden" - Samsung Galaxy S Advance (GT-I9070) "janice" - Samsung Galaxy Xcover 2 (GT-S7710) "skomer" and likely others as well (untested). At the moment, U-Boot is intended to be chain-loaded from the original Samsung bootloader, not replacing it entirely. Installation ------------ 1. Setup cross compiler, e.g. export CROSS_COMPILE=arm-none-eabi- 2. make stemmy_defconfig 3. make For newer devices (golden and skomer), the U-Boot binary has to be packed into an Android boot image. janice boots the raw U-Boot binary from the boot partition. 4. Obtain mkbootimg, e.g. https://android.googlesource.com/platform/system/core/+/refs/tags/android-7.1.2_r37/mkbootimg/mkbootimg 5. mkbootimg \ --kernel=u-boot.bin \ --base=0x00000000 \ --kernel_offset=0x00100000 \ --ramdisk_offset=0x02000000 \ --tags_offset=0x00000100 \ --output=u-boot.img 6. Enter Samsung download mode (press Power + Home + Volume Down) 7. Flash U-Boot image to Android boot partition using Heimdall: https://gitlab.com/BenjaminDobell/Heimdall heimdall flash --Kernel u-boot.(bin|img) 8. After reboot U-Boot prompt should appear via UART. UART ---- UART is available through the micro USB port, similar to the Carkit standard. With a ~619kOhm resistor between ID and GND, 1.8V RX/TX is available at D+/D-. Make sure to connect the UART cable *before* turning on the phone.