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|
#!/bin/sh
if [ $# -ne 2 ]
then
echo "usage: $0 <start|stop> <config>" >&2
exit 1
fi
action=$1
config=$2
gadget_name=mass-storage
gadget_dir=/sys/kernel/config/usb_gadget/$gadget_name
case "$config" in
0)
nbd_device=/dev/nbd0
;;
*)
echo "invalid config $config" >&2
exit 1
;;
esac
set -ex
case "$action" in
start)
mkdir -p $gadget_dir
(
cd $gadget_dir
# http://www.linux-usb.org/usb.ids
# |-> 1d6b Linux Foundation
# |-> 0104 Multifunction Composite Gadget
echo "0x1d6b" > idVendor
echo "0x0104" > idProduct
mkdir -p strings/0x409
echo "OpenBMC" > strings/0x409/manufacturer
echo "Virtual Media Device" > strings/0x409/product
mkdir -p configs/c.1/strings/0x409
echo "config 1" > configs/c.1/strings/0x409/configuration
mkdir -p functions/mass_storage.usb0
ln -s functions/mass_storage.usb0 configs/c.1
echo 1 > functions/mass_storage.usb0/lun.0/removable
echo 1 > functions/mass_storage.usb0/lun.0/ro
echo 0 > functions/mass_storage.usb0/lun.0/cdrom
echo $nbd_device > functions/mass_storage.usb0/lun.0/file
echo "1e6a0000.usb-vhub:p4" > UDC
)
;;
stop)
(
cd $gadget_dir
rm configs/c.1/mass_storage.usb0
rmdir functions/mass_storage.usb0
rmdir configs/c.1/strings/0x409
rmdir configs/c.1
rmdir strings/0x409
)
rmdir $gadget_dir
;;
*)
echo "invalid action $action" >&2
exit 1
esac
exit 0
|
