>
> The attached script works only when 2 of the 3 given classes are enabled. The
> failure is that UDC is not writeable. Is there a limit I am reaching? I did not think I
> would get to 32 endpoints, so is there a limitation due to my device's construction?
>
> I can not find any good troubleshooting information.
>
> Thanks in advance,
> R0b0t1
>
I tried the similar, it works for one mass_storage and two ACMs, see below.
Since you have failed for last step, please debug your controller
driver's .udc_start function, and see what's wrong.
mkdir functions/mass_storage.0
ln -s functions/mass_storage.0 configs/c.1
mkdir functions/acm.0
ln -s functions/acm.0 configs/c.1
mkdir functions/acm.1
ln -s functions/acm.1 configs/c.1
Peter
>
> ---
>
>
> #!/bin/bash
> set -euo pipefail
>
> # General configuration:
> GADGET_NAME="testgadget"
> LANGUAGE=0x409
> MANUFACTURER="Sidney Spry"
> PRODUCT="Test Gadget"
>
> # Function configuration:
> HOST_ADDRESS="1a:55:89:a2:69:42"
> DEV_ADDRESS="1a:55:89:a2:69:41"
>
>
> if [ "$EUID" -ne 0 ]; then
> echo "This script must run as root."
> exit 1
> fi
>
>
> echo "Loading libcomposite..."
> CONFIGFS="/sys/kernel/config/usb_gadget"
> GADGET="$CONFIGFS/$GADGET_NAME"
> modprobe libcomposite
>
> while [ ! -d $CONFIGFS ]; do
> sleep 0.01
> done
>
>
> echo "Cleaning existing gadget..."
> find $GADGET/configs/*/* -maxdepth 0 -type l -exec rm {} \; || true find
> $GADGET/configs/*/strings/* -maxdepth 0 -type d -exec rmdir {} \; || true find
> $GADGET/os_desc/* -maxdepth 0 -type l -exec rm {} \; || true find
> $GADGET/functions/* -maxdepth 0 -type d -exec rmdir {} \; || true find
> $GADGET/strings/* -maxdepth 0 -type d -exec rmdir {} \; || true find
> $GADGET/configs/* -maxdepth 0 -type d -exec rmdir {} \; || true rmdir $GADGET ||
> true
>
> #find "$GADGET/configs" -maxdepth 2 -type l -exec "rm" {} \; #find
> "$GADGET"/configs/*/strings/* -maxdepth 0 -type d -exec "rmdir" {} \; #find
> "$GADGET"/os_desc/* -maxdepth 0 -type l -exec "rm" {} \; #find
> "$GADGET"/configs/functions/* -maxdepth 0 -type d -exec "rmdir" {} \; #find
> "$GADGET"/configs/* -maxdepth 0 -type d -exec "rmdir" {} \; #rmdir "$GADGET"
>
> echo "Creating gadget..."
> mkdir "$GADGET"
> cd "$GADGET"
>
> echo "Configuring device identifiers..."
> echo 0x1d6b > idVendor # Linux Foundation echo 0x0104 > idProduct #
> Multifunction Composite Gadget echo 0x0001 > bcdDevice # v0.1.0
> echo 0x0200 > bcdUSB # USB 2.0
> mkdir "strings/$LANGUAGE"
> echo "$MANUFACTURER" > "strings/$LANGUAGE/manufacturer"
> echo "$PRODUCT" > "strings/$LANGUAGE/product"
>
> echo "Configuring composite device..."
> echo 0xEF > bDeviceClass
> echo 0x02 > bDeviceSubClass
> echo 0x01 > bDeviceProtocol
>
> echo "Configuring OS-specific descriptors..."
> echo 1 > os_desc/use
> echo 0xcd > os_desc/b_vendor_code
> echo MSFT100 > os_desc/qw_sign
>
> echo "Creating Ethernet endpoint (CDC NCM) (1/1)..."
> mkdir "functions/ncm.usb0"
> #echo "$HOST_ADDRESS" > "functions/ncm.usb0/host_addr"
> #echo "$DEV_ADDRESS" > "functions/ncm.usb0/dev_addr"
>
> echo "Creating serial endpoint (1/2)..."
> mkdir "functions/acm.usb0"
>
> echo "Creating serial endpoint (2/2)..."
> mkdir "functions/acm.usb1"
>
> echo "Creating configuration..."
> mkdir "configs/c.1"
> echo 500 > "configs/c.1/MaxPower"
> mkdir "configs/c.1/strings/$LANGUAGE"
> echo "Config 1" > "configs/c.1/strings/$LANGUAGE/configuration"
> ln -s "functions/ncm.usb0" "configs/c.1"
> ln -s "functions/acm.usb0" "configs/c.1"
> ln -s "functions/acm.usb1" "configs/c.1"
> ln -s "configs/c.1" "os_desc/c.1"
>
> echo "Attaching device..."
> udevadm settle
> ls "/sys/class/udc/" > UDC
>
> echo "Done."
> --
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