mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 02:33:07 +00:00
58 lines
1.2 KiB
ReStructuredText
58 lines
1.2 KiB
ReStructuredText
|
.. SPDX-License-Identifier: GPL-2.0+
|
||
|
|
|
||
|
|
ums command
|
||
|
|
===========
|
||
|
|
|
||
|
|
Synopsis
|
||
|
|
--------
|
||
|
|
|
||
|
|
::
|
||
|
|
|
||
|
|
ums <dev> [<interface>] <devnum[:partnum]>
|
||
|
|
|
||
|
|
Description
|
||
|
|
-----------
|
||
|
|
|
||
|
|
Use the USB Mass Storage class (also known as UMS) to make accessible an U-Boot
|
||
|
|
block device (fully or with :ref:`U-Boot's partition syntax <partitions>`)
|
||
|
|
to a USB host and to enable file transfers. U-Boot, the USB device, acts as a
|
||
|
|
simple external hard drive plugged on the host USB port.
|
||
|
|
|
||
|
|
This command "ums" stays in the USB's treatment loop until user enters Ctrl-C.
|
||
|
|
|
||
|
|
dev
|
||
|
|
USB gadget device number
|
||
|
|
|
||
|
|
interface
|
||
|
|
interface for accessing the block device (mmc, sata, scsi, usb, ....)
|
||
|
|
defaults is "mmc"
|
||
|
|
|
||
|
|
devnum
|
||
|
|
device number for selected interface
|
||
|
|
|
||
|
|
partnum
|
||
|
|
partition number or 0 to expose all partitions, defaults to 0
|
||
|
|
|
||
|
|
Example
|
||
|
|
-------
|
||
|
|
|
||
|
|
::
|
||
|
|
|
||
|
|
=> ums 0 mmc 0
|
||
|
|
=> ums 0 usb 1:2
|
||
|
|
|
||
|
|
Configuration
|
||
|
|
-------------
|
||
|
|
|
||
|
|
The ums command is only available if CONFIG_CMD_USB_MASS_STORAGE=y
|
||
|
|
and depends on CONFIG_USB_USB_GADGET and CONFIG_BLK.
|
||
|
|
|
||
|
|
Return value
|
||
|
|
------------
|
||
|
|
|
||
|
|
The return value $? is set to 0 (true) when the USB stack was successfully
|
||
|
|
started and interrupted, with Ctrl-C or after USB cable issue (detection
|
||
|
|
timeout or cable removal).
|
||
|
|
|
||
|
|
If an error occurs, the return value $? is set to 1 (false).
|