summaryrefslogtreecommitdiff
path: root/scripts/uvc-gadget.sh
blob: 46cc3840a15d7fbd053922d2a5f85e1f39f04197 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
#!/bin/sh
# SPDX-License-Identifier: MIT

set -e
#set -x

CONFIGFS="/sys/kernel/config"
GADGET="$CONFIGFS/usb_gadget"
VID="0x0525"
PID="0xa4a2"
SERIAL="0123456789"
MANUF=$(hostname)
PRODUCT="UVC Gadget"

USBFILE=/root/usbstorage.img

BOARD=$(strings /proc/device-tree/model)

case $BOARD in
	"Renesas Salvator-X board based on r8a7795 ES1.x")
		UDC_USB2=e6590000.usb
		UDC_USB3=ee020000.usb

		UDC_ROLE2=/sys/devices/platform/soc/ee080200.usb-phy/role
		UDC_ROLE2=/dev/null #Not needed - always peripheral
		UDC_ROLE3=/sys/devices/platform/soc/ee020000.usb/role

		UDC=$UDC_USB2
		UDC_ROLE=$UDC_ROLE2
		;;

	"TI OMAP4 PandaBoard-ES")
		UDC=`ls /sys/class/udc` # Should be musb-hdrc.0.auto
		UDC_ROLE=/dev/null # Not needed - peripheral enabled
		;;

	*)
		UDC=`ls /sys/class/udc` # will identify the 'first' UDC
		UDC_ROLE=/dev/null # Not generic
		;;
esac

echo "Detecting platform:"
echo "  board : $BOARD"
echo "  udc   : $UDC"

create_msd() {
	# Example usage:
	#	create_msd <target config> <function name> <image file>
	#	create_msd configs/c.1 mass_storage.0 /root/backing.img
	CONFIG=$1
	FUNCTION=$2
	BACKING_STORE=$3

	if [ ! -f $BACKING_STORE ]
	then
		echo "\tCreating backing file"
		dd if=/dev/zero of=$BACKING_STORE bs=1M count=32 > /dev/null 2>&1
		mkfs.ext4 $USBFILE > /dev/null 2>&1
		echo "\tOK"
	fi

	echo "\tCreating MSD gadget functionality"
	mkdir functions/$FUNCTION
	echo 1 > functions/$FUNCTION/stall
	echo $BACKING_STORE > functions/$FUNCTION/lun.0/file
	echo 1 > functions/$FUNCTION/lun.0/removable
	echo 0 > functions/$FUNCTION/lun.0/cdrom

	ln -s functions/$FUNCTION configs/c.1

	echo "\tOK"
}

delete_msd() {
	# Example usage:
	#	delete_msd <target config> <function name>
	#	delete_msd config/c.1 uvc.0
	CONFIG=$1
	FUNCTION=$2

	echo "Removing Mass Storage interface : $FUNCTION"
	rm -f $CONFIG/$FUNCTION
	rmdir functions/$FUNCTION
	echo "OK"
}

create_uvc() {
	# Example usage:
	#	create_uvc <target config> <function name>
	#	create_uvc config/c.1 uvc.0
	CONFIG=$1
	FUNCTION=$2

	echo "	Creating UVC gadget functionality : $FUNCTION"
	mkdir functions/$FUNCTION
	mkdir -p functions/$FUNCTION/streaming/uncompressed/u/360p
	cat <<EOF > functions/$FUNCTION/streaming/uncompressed/u/360p/dwFrameInterval
666666
1000000
5000000
EOF
	mkdir functions/$FUNCTION/streaming/header/h
	cd functions/$FUNCTION/streaming/header/h
	ln -s ../../uncompressed/u
	cd ../../class/fs
	ln -s ../../header/h
	cd ../../class/hs
	ln -s ../../header/h
	cd ../../../control
	mkdir header/h
	ln -s header/h class/fs
	ln -s header/h class/ss
	cd ../../../

	# Set the packet size: uvc gadget max size is 3k...
	echo 3072 > functions/$FUNCTION/streaming_maxpacket
	echo 2048 > functions/$FUNCTION/streaming_maxpacket
	echo 1024 > functions/$FUNCTION/streaming_maxpacket

	ln -s functions/$FUNCTION configs/c.1
}

delete_uvc() {
	# Example usage:
	#	delete_uvc <target config> <function name>
	#	delete_uvc config/c.1 uvc.0
	CONFIG=$1
	FUNCTION=$2

	echo "	Deleting UVC gadget functionality : $FUNCTION"
	rm $CONFIG/$FUNCTION

	rm functions/$FUNCTION/control/class/*/h
	rm functions/$FUNCTION/streaming/class/*/h
	rm functions/$FUNCTION/streaming/header/h/u
	rmdir functions/$FUNCTION/streaming/uncompressed/u/360p
	rmdir functions/$FUNCTION/streaming/uncompressed/u
	rmdir functions/$FUNCTION/streaming/header/h
	rmdir functions/$FUNCTION/control/header/h
	rmdir functions/$FUNCTION
}

case "$1" in
    start)
	echo "Creating the USB gadget"
	#echo "Loading composite module"
	#modprobe libcomposite

	echo "Creating gadget directory g1"
	mkdir -p $GADGET/g1

	cd $GADGET/g1
	if [ $? -ne 0 ]; then
	    echo "Error creating usb gadget in configfs"
	    exit 1;
	else
	    echo "OK"
	fi

	echo "Setting Vendor and Product ID's"
	echo $VID > idVendor
	echo $PID > idProduct
	echo "OK"

	echo "Setting English strings"
	mkdir -p strings/0x409
	echo $SERIAL > strings/0x409/serialnumber
	echo $MANUF > strings/0x409/manufacturer
	echo $PRODUCT > strings/0x409/product
	echo "OK"

	echo "Creating Config"
	mkdir configs/c.1
	mkdir configs/c.1/strings/0x409

	echo "Creating functions..."
	#create_msd configs/c.1 mass_storage.0 $USBFILE
	create_uvc configs/c.1 uvc.0
	#create_uvc configs/c.1 uvc.1
	echo "OK"

	echo "Binding USB Device Controller"
	echo $UDC > UDC
	echo peripheral > $UDC_ROLE
	cat $UDC_ROLE
	echo "OK"
	;;

    stop)
	echo "Stopping the USB gadget"

	set +e # Ignore all errors here on a best effort

	cd $GADGET/g1

	if [ $? -ne 0 ]; then
	    echo "Error: no configfs gadget found"
	    exit 1;
	fi

	echo "Unbinding USB Device Controller"
	grep $UDC UDC && echo "" > UDC
	echo "OK"

	#delete_uvc configs/c.1 uvc.1
	delete_uvc configs/c.1 uvc.0
	#delete_msd configs/c.1 mass_storage.0

	echo "Clearing English strings"
	rmdir strings/0x409
	echo "OK"

	echo "Cleaning up configuration"
	rmdir configs/c.1/strings/0x409
	rmdir configs/c.1
	echo "OK"

	echo "Removing gadget directory"
	cd $GADGET
	rmdir g1
	cd /
	echo "OK"

	#echo "Disable composite USB gadgets"
	#modprobe -r libcomposite
	#echo "OK"
	;;
    *)
	echo "Usage : $0 {start|stop}"
esac