Simon Glass 691d719db7 common: Drop init.h from common header 4 лет назад
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Kconfig 43d28855d8 board: Add new Samsung "stemmy" board based on ST-Ericsson U8500 4 лет назад
MAINTAINERS 43d28855d8 board: Add new Samsung "stemmy" board based on ST-Ericsson U8500 4 лет назад
Makefile 43d28855d8 board: Add new Samsung "stemmy" board based on ST-Ericsson U8500 4 лет назад
README 43d28855d8 board: Add new Samsung "stemmy" board based on ST-Ericsson U8500 4 лет назад
stemmy.c 691d719db7 common: Drop init.h from common header 4 лет назад

README

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.