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401d1c4f5d
Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include <asm/global_data.h> at all, so remove that include. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
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.