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https://github.com/brain-hackers/u-boot-brain
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![]() In a config with one MMC at device id '1' and no MMC at device id '0' (a BeagleBone Black with no sd inserted for example), the current code will first test to access the MMC 0 (sd port), seeing that no device is present it will simply return that no more device are present for this class. This patch fixes this by testing all devices for each class. Signed-off-by: Emmanuel Vadot <manu@bidouilliste.com> |
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api_display.c | ||
api_net.c | ||
api_platform-arm.c | ||
api_platform-mips.c | ||
api_platform-powerpc.c | ||
api_private.h | ||
api_storage.c | ||
api.c | ||
Makefile | ||
README |
U-Boot machine/arch independent API for external apps ===================================================== 1. Main assumptions - there is a single entry point (syscall) to the API - per current design the syscall is a C-callable function in the U-Boot text, which might evolve into a real syscall using machine exception trap once this initial version proves functional - the consumer app is responsible for producing appropriate context (call number and arguments) - upon entry, the syscall dispatches the call to other (existing) U-Boot functional areas like networking or storage operations - consumer application will recognize the API is available by searching a specified (assumed by convention) range of address space for the signature - the U-Boot integral part of the API is meant to be thin and non-intrusive, leaving as much processing as possible on the consumer application side, for example it doesn't keep states, but relies on hints from the app and so on - optional (CONFIG_API) 2. Calls - console related (getc, putc, tstc etc.) - system (reset, platform info) - time (delay, current) - env vars (enumerate all, get, set) - devices (enumerate all, open, close, read, write); currently two classes of devices are recognized and supported: network and storage (ide, scsi, usb etc.) 3. Structure overview - core API, integral part of U-Boot, mandatory - implements the single entry point (mimics UNIX syscall) - glue - entry point at the consumer side, allows to make syscall, mandatory part - helper conveniency wrappers so that consumer app does not have to use the syscall directly, but in a more friendly manner (a la libc calls), optional part - consumer application - calls directly, or leverages the provided glue mid-layer