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usb: gadget: add SDP driver

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Add SDP (Serial Downloader Protocol) implementation for U-Boot. The
protocol is used in NXP SoC's boot ROM and allows to download program
images. Beside that, it can also be used to read/write registers and
download complete Device Configuration Data (DCD) sets. This basic
implementation supports downloading images with the imx header format
reading and writing registers.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Łukasz Majewski <lukma@denx.de>
This commit is contained in:
Stefan Agner 2017-08-16 11:00:51 -07:00 • committed by Stefano Babic
parent 4e76c0774a
commit 5661f08a71
4 changed files with 745 additions and 0 deletions
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include/sdp.h Normal file
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/*
* sdp.h - Serial Download Protocol
*
* Copyright (C) 2017 Toradex
* Author: Stefan Agner <stefan.agner@toradex.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __SDP_H_
#define __SDP_H_
int sdp_init(int controller_index);
void sdp_handle(int controller_index);
#endif /* __SDP_H_ */