imx/misc/sdp.txt

1 -------------
2 SDP in U-Boot
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9 The implementation in U-Boot uses the USB Downloader Gadget (g_dnl) to
11 images to the target in SPL/U-Boot using the same protocol/tooling the
16 U-Boot implementation has primarly been tested using the open source
20 install U-Boot without a JTAG debugger, using the USB boot mode as
26 for imx_loader's imx_usb utility which allow to interpret the U-Boot
27 specific legacy image format (see mkimage(1)). Also the U-Boot side
28 support beside the i.MX specific header the U-Boot legacy header.
31 --------------------------------------------------
33 This implementation can be started in U-Boot using the sdp command
34 (CONFIG_CMD_USB_SDP) or in SPL if Serial Downloader boot mode has been
37 A typical use case is downloading full U-Boot after SPL has been
38 downloaded through the boot ROM's Serial Downloader. Using boot mode
52 U-Boot configurations CONFIG_G_DNL_(VENDOR|PRODUCT)_NUM. Make sure
63 This allows to download the regular U-Boot with legacy image headers
64 (u-boot.img) using a second invocation of imx_usb:
66   # imx_usb u-boot.img
68 Furthermore, when U-Boot is running the sdp command can be used to
81 There is also a batch mode which allows imx_usb to handle multiple
87 In this mode the file to download (imx_usb job) needs to be specified
100   u-boot.img:jump header2
102 With that SPL and U-Boot can be downloaded with a single invocation
107 2. Using imx_usb_loader non-SPL images
108 ---------------------------------------
110 Booting in USB mode, the i.MX6 announces itself to the Linux Host as:
114 imx_usb_loader is able to download a single file (u-boot.imx)
118 	sudo ../imx_usb_loader/imx_usb -v u-boot.imx