Kconfig - OpenGrok cross reference for /linux-6.12.1/drivers/usb/gadget/legacy/Kconfig

1 # SPDX-License-Identifier: GPL-2.0
3 # USB Gadget support on a system involves
7 # NOTE:  Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !!
9 #  - Host systems (like PCs) need CONFIG_USB (with "A" jacks).
10 #  - Peripherals (like PDAs) need CONFIG_USB_GADGET (with "B" jacks).
11 #  - Some systems have both kinds of controllers.
13 # With help from a special transceiver and a "Mini-AB" jack, systems with
14 # both kinds of controller can also support "USB On-the-Go" (CONFIG_USB_OTG).
16 # A Linux "Gadget Driver" talks to the USB Peripheral Controller
19 # are a subset (implementing a USB device class specification).
20 # A gadget driver implements one or more USB functions using
23 # Gadget drivers are hardware-neutral, or "platform independent",
31 # The available choices each represent a single precomposed USB
33 # both the device instantiation as a child for a USB gadget
37 menu "USB Gadget precomposed configurations"
44 	  Gadget Zero is a two-configuration device.  It either sinks and
47 	  conformance.  The driver needs only two bulk-capable endpoints, so
48 	  it can work on top of most device-side usb controllers.  It's
50 	  USB "gadget drivers" can be written.
53 	  USB peripheral controller driver.  Then you can use host-side
57 	  Gadget Zero also works with the host-side "usb-skeleton" driver,
58 	  and with many kinds of host-side test software.  You may need
59 	  to tweak product and vendor IDs before host software knows about
70 	  identifiers of the USB-OTG test device.  That means that when
72 	  the "B-Peripheral" role, that device will use HNP to let this
73 	  one serve as the USB host instead (in the "B-Host" role).
85 	  This Gadget Audio driver is compatible with USB Audio Class
87 	  1 AudioStreaming Interface each for USB-OUT and USB-IN.
91 	  on the device - the audio streams are simply sinked to and
92 	  sourced from a virtual ALSA sound card created. The user-space
94 	  received from the USB Host and choose to provide whatever it
95 	  wants as audio data to the USB Host.
104 	  If you instead want older USB Audio Class specification 1.0 support
111 	  If you instead want legacy UAC Spec-1.0 driver that also has audio
112 	  paths hardwired to the Audio codec chip on-board and doesn't work
127 	   - The "Communication Device Class" (CDC) Ethernet Control Model.
129 	     favor of simpler vendor-specific hardware, but is widely
132 	   - On hardware can't implement that protocol, a simple CDC subset
133 	     is used, placing fewer demands on USB.
135 	   - CDC Ethernet Emulation Model (EEM) is a newer standard that has
136 	     a simpler interface that can be used by more USB hardware.
140 	  Within the USB device, this gadget driver exposes a network device
142 	  Treat it like a two-node Ethernet link:  host, and gadget.
144 	  The Linux-USB host-side "usbnet" driver interoperates with this
148 	  drivers on other host operating systems.
166 	   Microsoft USB hosts.
168 	   To make MS-Windows work with this, use Documentation/usb/linux.inf
169 	   as the "driver info file".  For versions of MS-Windows older than
179 	  CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
182 	  the network interface to the target (e.g. a USB cable modem), and the
184 	  ethernet over USB.  For Linux gadgets, however, the interface with
185 	  the host is the same (a usbX device), so the differences are minimal.
198 	  This driver implements USB CDC NCM subclass standard. NCM is
200 	  of several ethernet frames into one USB transfer and different
210 	  programs implement a single-configuration USB device, including
224 	  The Function Filesystem (FunctionFS) lets one create USB
226 	  lets one create USB gadgets in user space.  This allows creation
268 	  The Mass Storage Gadget acts as a USB Mass Storage disk drive.
273 	  This driver is a replacement for now removed File-backed
280 	tristate "USB Gadget Target Fabric Module"
285 	  This fabric is an USB gadget. Two USB protocols are supported that is
286 	  BBB or BOT (Bulk Only Transport) and UAS (USB Attached SCSI). BOT is
289 	  UAS utilizes the USB 3.0 feature called streams support.
300 	  The Serial Gadget talks to the Linux-USB generic serial driver.
301 	  This driver supports a CDC-ACM module option, which can be used
302 	  to interoperate with MS-Windows hosts or with the Linux-USB
303 	  "cdc-acm" driver.
305 	  This driver also supports a CDC-OBEX option.  You will need a
312 	  For more information, see Documentation/usb/gadget_serial.rst
314 	  make MS-Windows work with CDC ACM.
323 	  The MIDI Gadget acts as a USB Audio device, with one MIDI
337 	  The Printer Gadget channels data between the USB host and a
346 	  For more information, see Documentation/usb/gadget_printer.rst
458 	  The HID gadget driver provides generic emulation of USB
461 	  For more information, see Documentation/usb/gadget_hid.rst which
502 	tristate "USB Webcam Gadget"
509 	  The Webcam Gadget acts as a composite USB Audio and Video Class
511 	  and stream video data to the host.
517 	tristate "USB Raw Gadget"
519 	  USB Raw Gadget is a gadget driver that gives userspace low-level
522 	  Like any other gadget driver, Raw Gadget implements USB devices via
523 	  the USB gadget API. Unlike most gadget drivers, Raw Gadget does not
524 	  implement any concrete USB functions itself but requires userspace
527 	  See Documentation/usb/raw-gadget.rst for details.