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USB_TEMPLATE(4) Device Drivers Manual USB_TEMPLATE(4)

usb_templateUSB device side templates

To compile this module into the kernel, place the following line in your kernel configuration file:

device usb_template

To load the module at boot time, place the following line in loader.conf(5):

usb_template_load="YES"

The usb_template module implements various USB templates that are needed when programming an USB device side driver. A USB template consists of an USB device descriptor, one or more USB configuration descriptors, one or more USB interface descriptors, one or more USB endpoint descriptors, USB strings and additional USB descriptors. USB templates are selected using the hw.usb.template sysctl and tunable, or by using the usbconfig(8) set_template subcommand. Changing the hw.usb.template sysctl triggers reenumeration by the USB host; changes to other sysctls may not be visible to the host until reenumeration is performed.

Available templates are:

USB Mass Storage, see cfumass(4)
CDC Ethernet, see cdce(4)
Media Transfer Protocol (MTP)
USB serial port, see umodem(4)
USB audio
USB keyboard
USB mouse
USB phone
CDC Ethernet and serial port
USB MIDI
CDC Ethernet, serial port, and storage

The following variables are available as both sysctl(8) variables and loader(8) tunables:

hw.usb.template
Currently selected template. Set to -1 to make the device disappear from the USB host point of view.
hw.usb.template_power
USB bus power consumption in mA at 5V. Must be between 0 and 500. Setting to 0 marks the device as self-powered. Defaults to 500mA.
hw.usb.templates.N
Configuration for template number N.
hw.usb.templates.N.vendor_id
16-bit vendor identifier (VID), usually assigned by USB-IF.
hw.usb.templates.N.product_id
16-bit product identifier (PID).
hw.usb.templates.N.manufacturer
String containing human-readable manufacturer name.
hw.usb.templates.N.product
String containing human-readable product name.

cfumass(4), usb(4), usfs(4), usbconfig(8)

The usb_template module complies to the USB 1.0, 2.0 and 3.0 standard.

The usb_template module was written by Hans Petter Selasky <hselasky@FreeBSD.org>.

May 24, 2018 FreeBSD-12.0