528 lines
18 KiB
Plaintext
528 lines
18 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# USB Gadget support on a system involves
|
|
# (a) a peripheral controller, and
|
|
# (b) the gadget driver using it.
|
|
#
|
|
# NOTE: Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !!
|
|
#
|
|
# - Host systems (like PCs) need CONFIG_USB (with "A" jacks).
|
|
# - Peripherals (like PDAs) need CONFIG_USB_GADGET (with "B" jacks).
|
|
# - Some systems have both kinds of controllers.
|
|
#
|
|
# With help from a special transceiver and a "Mini-AB" jack, systems with
|
|
# both kinds of controller can also support "USB On-the-Go" (CONFIG_USB_OTG).
|
|
#
|
|
# A Linux "Gadget Driver" talks to the USB Peripheral Controller
|
|
# driver through the abstract "gadget" API. Some other operating
|
|
# systems call these "client" drivers, of which "class drivers"
|
|
# are a subset (implementing a USB device class specification).
|
|
# A gadget driver implements one or more USB functions using
|
|
# the peripheral hardware.
|
|
#
|
|
# Gadget drivers are hardware-neutral, or "platform independent",
|
|
# except that they sometimes must understand quirks or limitations
|
|
# of the particular controllers they work with. For example, when
|
|
# a controller doesn't support alternate configurations or provide
|
|
# enough of the right types of endpoints, the gadget driver might
|
|
# not be able work with that controller, or might need to implement
|
|
# a less common variant of a device class protocol.
|
|
#
|
|
# The available choices each represent a single precomposed USB
|
|
# gadget configuration. In the device model, each option contains
|
|
# both the device instantiation as a child for a USB gadget
|
|
# controller, and the relevant drivers for each function declared
|
|
# by the device.
|
|
|
|
menu "USB Gadget precomposed configurations"
|
|
|
|
config USB_ZERO
|
|
tristate "Gadget Zero (DEVELOPMENT)"
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_SS_LB
|
|
help
|
|
Gadget Zero is a two-configuration device. It either sinks and
|
|
sources bulk data; or it loops back a configurable number of
|
|
transfers. It also implements control requests, for "chapter 9"
|
|
conformance. The driver needs only two bulk-capable endpoints, so
|
|
it can work on top of most device-side usb controllers. It's
|
|
useful for testing, and is also a working example showing how
|
|
USB "gadget drivers" can be written.
|
|
|
|
Make this be the first driver you try using on top of any new
|
|
USB peripheral controller driver. Then you can use host-side
|
|
test software, like the "usbtest" driver, to put your hardware
|
|
and its driver through a basic set of functional tests.
|
|
|
|
Gadget Zero also works with the host-side "usb-skeleton" driver,
|
|
and with many kinds of host-side test software. You may need
|
|
to tweak product and vendor IDs before host software knows about
|
|
this device, and arrange to select an appropriate configuration.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_zero".
|
|
|
|
config USB_ZERO_HNPTEST
|
|
bool "HNP Test Device"
|
|
depends on USB_ZERO && USB_OTG
|
|
help
|
|
You can configure this device to enumerate using the device
|
|
identifiers of the USB-OTG test device. That means that when
|
|
this gadget connects to another OTG device, with this one using
|
|
the "B-Peripheral" role, that device will use HNP to let this
|
|
one serve as the USB host instead (in the "B-Host" role).
|
|
|
|
config USB_AUDIO
|
|
tristate "Audio Gadget"
|
|
depends on SND
|
|
select USB_LIBCOMPOSITE
|
|
select SND_PCM
|
|
select USB_F_UAC1 if (GADGET_UAC1 && !GADGET_UAC1_LEGACY)
|
|
select USB_F_UAC1_LEGACY if (GADGET_UAC1 && GADGET_UAC1_LEGACY)
|
|
select USB_F_UAC2 if !GADGET_UAC1
|
|
select USB_U_AUDIO if (USB_F_UAC2 || USB_F_UAC1)
|
|
help
|
|
This Gadget Audio driver is compatible with USB Audio Class
|
|
specification 2.0. It implements 1 AudioControl interface,
|
|
1 AudioStreaming Interface each for USB-OUT and USB-IN.
|
|
Number of channels, sample rate and sample size can be
|
|
specified as module parameters.
|
|
This driver doesn't expect any real Audio codec to be present
|
|
on the device - the audio streams are simply sinked to and
|
|
sourced from a virtual ALSA sound card created. The user-space
|
|
application may choose to do whatever it wants with the data
|
|
received from the USB Host and choose to provide whatever it
|
|
wants as audio data to the USB Host.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_audio".
|
|
|
|
config GADGET_UAC1
|
|
bool "UAC 1.0"
|
|
depends on USB_AUDIO
|
|
help
|
|
If you instead want older USB Audio Class specification 1.0 support
|
|
with similar driver capabilities.
|
|
|
|
config GADGET_UAC1_LEGACY
|
|
bool "UAC 1.0 (Legacy)"
|
|
depends on GADGET_UAC1
|
|
help
|
|
If you instead want legacy UAC Spec-1.0 driver that also has audio
|
|
paths hardwired to the Audio codec chip on-board and doesn't work
|
|
without one.
|
|
|
|
config USB_ETH
|
|
tristate "Ethernet Gadget (with CDC Ethernet support)"
|
|
depends on NET
|
|
select USB_LIBCOMPOSITE
|
|
select USB_U_ETHER
|
|
select USB_F_ECM
|
|
select USB_F_SUBSET
|
|
select CRC32
|
|
help
|
|
This driver implements Ethernet style communication, in one of
|
|
several ways:
|
|
|
|
- The "Communication Device Class" (CDC) Ethernet Control Model.
|
|
That protocol is often avoided with pure Ethernet adapters, in
|
|
favor of simpler vendor-specific hardware, but is widely
|
|
supported by firmware for smart network devices.
|
|
|
|
- On hardware can't implement that protocol, a simple CDC subset
|
|
is used, placing fewer demands on USB.
|
|
|
|
- CDC Ethernet Emulation Model (EEM) is a newer standard that has
|
|
a simpler interface that can be used by more USB hardware.
|
|
|
|
RNDIS support is an additional option, more demanding than subset.
|
|
|
|
Within the USB device, this gadget driver exposes a network device
|
|
"usbX", where X depends on what other networking devices you have.
|
|
Treat it like a two-node Ethernet link: host, and gadget.
|
|
|
|
The Linux-USB host-side "usbnet" driver interoperates with this
|
|
driver, so that deep I/O queues can be supported. On 2.4 kernels,
|
|
use "CDCEther" instead, if you're using the CDC option. That CDC
|
|
mode should also interoperate with standard CDC Ethernet class
|
|
drivers on other host operating systems.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_ether".
|
|
|
|
config USB_ETH_RNDIS
|
|
bool "RNDIS support"
|
|
depends on USB_ETH
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_RNDIS
|
|
default y
|
|
help
|
|
Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
|
|
and Microsoft provides redistributable binary RNDIS drivers for
|
|
older versions of Windows.
|
|
|
|
If you say "y" here, the Ethernet gadget driver will try to provide
|
|
a second device configuration, supporting RNDIS to talk to such
|
|
Microsoft USB hosts.
|
|
|
|
To make MS-Windows work with this, use Documentation/usb/linux.inf
|
|
as the "driver info file". For versions of MS-Windows older than
|
|
XP, you'll need to download drivers from Microsoft's website; a URL
|
|
is given in comments found in that info file.
|
|
|
|
config USB_ETH_EEM
|
|
bool "Ethernet Emulation Model (EEM) support"
|
|
depends on USB_ETH
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_EEM
|
|
help
|
|
CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
|
|
and therefore can be supported by more hardware. Technically ECM and
|
|
EEM are designed for different applications. The ECM model extends
|
|
the network interface to the target (e.g. a USB cable modem), and the
|
|
EEM model is for mobile devices to communicate with hosts using
|
|
ethernet over USB. For Linux gadgets, however, the interface with
|
|
the host is the same (a usbX device), so the differences are minimal.
|
|
|
|
If you say "y" here, the Ethernet gadget driver will use the EEM
|
|
protocol rather than ECM. If unsure, say "n".
|
|
|
|
config USB_G_NCM
|
|
tristate "Network Control Model (NCM) support"
|
|
depends on NET
|
|
select USB_LIBCOMPOSITE
|
|
select USB_U_ETHER
|
|
select USB_F_NCM
|
|
select CRC32
|
|
help
|
|
This driver implements USB CDC NCM subclass standard. NCM is
|
|
an advanced protocol for Ethernet encapsulation, allows grouping
|
|
of several ethernet frames into one USB transfer and different
|
|
alignment possibilities.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_ncm".
|
|
|
|
config USB_GADGETFS
|
|
tristate "Gadget Filesystem"
|
|
help
|
|
This driver provides a filesystem based API that lets user mode
|
|
programs implement a single-configuration USB device, including
|
|
endpoint I/O and control requests that don't relate to enumeration.
|
|
All endpoints, transfer speeds, and transfer types supported by
|
|
the hardware are available, through read() and write() calls.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "gadgetfs".
|
|
|
|
config USB_FUNCTIONFS
|
|
tristate "Function Filesystem"
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_FS
|
|
select USB_FUNCTIONFS_GENERIC if !(USB_FUNCTIONFS_ETH || USB_FUNCTIONFS_RNDIS)
|
|
help
|
|
The Function Filesystem (FunctionFS) lets one create USB
|
|
composite functions in user space in the same way GadgetFS
|
|
lets one create USB gadgets in user space. This allows creation
|
|
of composite gadgets such that some of the functions are
|
|
implemented in kernel space (for instance Ethernet, serial or
|
|
mass storage) and other are implemented in user space.
|
|
|
|
If you say "y" or "m" here you will be able what kind of
|
|
configurations the gadget will provide.
|
|
|
|
Say "y" to link the driver statically, or "m" to build
|
|
a dynamically linked module called "g_ffs".
|
|
|
|
config USB_FUNCTIONFS_ETH
|
|
bool "Include configuration with CDC ECM (Ethernet)"
|
|
depends on USB_FUNCTIONFS && NET
|
|
select USB_U_ETHER
|
|
select USB_F_ECM
|
|
select USB_F_SUBSET
|
|
help
|
|
Include a configuration with CDC ECM function (Ethernet) and the
|
|
Function Filesystem.
|
|
|
|
config USB_FUNCTIONFS_RNDIS
|
|
bool "Include configuration with RNDIS (Ethernet)"
|
|
depends on USB_FUNCTIONFS && NET
|
|
select USB_U_ETHER
|
|
select USB_F_RNDIS
|
|
help
|
|
Include a configuration with RNDIS function (Ethernet) and the Filesystem.
|
|
|
|
config USB_FUNCTIONFS_GENERIC
|
|
bool "Include 'pure' configuration"
|
|
depends on USB_FUNCTIONFS
|
|
help
|
|
Include a configuration with the Function Filesystem alone with
|
|
no Ethernet interface.
|
|
|
|
config USB_MASS_STORAGE
|
|
tristate "Mass Storage Gadget"
|
|
depends on BLOCK
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_MASS_STORAGE
|
|
help
|
|
The Mass Storage Gadget acts as a USB Mass Storage disk drive.
|
|
As its storage repository it can use a regular file or a block
|
|
device (in much the same way as the "loop" device driver),
|
|
specified as a module parameter or sysfs option.
|
|
|
|
This driver is a replacement for now removed File-backed
|
|
Storage Gadget (g_file_storage).
|
|
|
|
Say "y" to link the driver statically, or "m" to build
|
|
a dynamically linked module called "g_mass_storage".
|
|
|
|
config USB_GADGET_TARGET
|
|
tristate "USB Gadget Target Fabric Module"
|
|
depends on TARGET_CORE
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_TCM
|
|
help
|
|
This fabric is an USB gadget. Two USB protocols are supported that is
|
|
BBB or BOT (Bulk Only Transport) and UAS (USB Attached SCSI). BOT is
|
|
advertised on alternative interface 0 (primary) and UAS is on
|
|
alternative interface 1. Both protocols can work on USB2.0 and USB3.0.
|
|
UAS utilizes the USB 3.0 feature called streams support.
|
|
|
|
config USB_G_SERIAL
|
|
tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
|
|
depends on TTY
|
|
select USB_U_SERIAL
|
|
select USB_F_ACM
|
|
select USB_F_SERIAL
|
|
select USB_F_OBEX
|
|
select USB_LIBCOMPOSITE
|
|
help
|
|
The Serial Gadget talks to the Linux-USB generic serial driver.
|
|
This driver supports a CDC-ACM module option, which can be used
|
|
to interoperate with MS-Windows hosts or with the Linux-USB
|
|
"cdc-acm" driver.
|
|
|
|
This driver also supports a CDC-OBEX option. You will need a
|
|
user space OBEX server talking to /dev/ttyGS*, since the kernel
|
|
itself doesn't implement the OBEX protocol.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_serial".
|
|
|
|
For more information, see Documentation/usb/gadget_serial.rst
|
|
which includes instructions and a "driver info file" needed to
|
|
make MS-Windows work with CDC ACM.
|
|
|
|
config USB_MIDI_GADGET
|
|
tristate "MIDI Gadget"
|
|
depends on SND
|
|
select USB_LIBCOMPOSITE
|
|
select SND_RAWMIDI
|
|
select USB_F_MIDI
|
|
help
|
|
The MIDI Gadget acts as a USB Audio device, with one MIDI
|
|
input and one MIDI output. These MIDI jacks appear as
|
|
a sound "card" in the ALSA sound system. Other MIDI
|
|
connections can then be made on the gadget system, using
|
|
ALSA's aconnect utility etc.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_midi".
|
|
|
|
config USB_G_PRINTER
|
|
tristate "Printer Gadget"
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_PRINTER
|
|
help
|
|
The Printer Gadget channels data between the USB host and a
|
|
userspace program driving the print engine. The user space
|
|
program reads and writes the device file /dev/g_printer to
|
|
receive or send printer data. It can use ioctl calls to
|
|
the device file to get or set printer status.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_printer".
|
|
|
|
For more information, see Documentation/usb/gadget_printer.rst
|
|
which includes sample code for accessing the device file.
|
|
|
|
if TTY
|
|
|
|
config USB_CDC_COMPOSITE
|
|
tristate "CDC Composite Device (Ethernet and ACM)"
|
|
depends on NET
|
|
select USB_LIBCOMPOSITE
|
|
select USB_U_SERIAL
|
|
select USB_U_ETHER
|
|
select USB_F_ACM
|
|
select USB_F_ECM
|
|
help
|
|
This driver provides two functions in one configuration:
|
|
a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link.
|
|
|
|
This driver requires four bulk and two interrupt endpoints,
|
|
plus the ability to handle altsettings. Not all peripheral
|
|
controllers are that capable.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module.
|
|
|
|
config USB_G_NOKIA
|
|
tristate "Nokia composite gadget"
|
|
depends on PHONET
|
|
depends on BLOCK
|
|
select USB_LIBCOMPOSITE
|
|
select USB_U_SERIAL
|
|
select USB_U_ETHER
|
|
select USB_F_ACM
|
|
select USB_F_OBEX
|
|
select USB_F_PHONET
|
|
select USB_F_ECM
|
|
select USB_F_MASS_STORAGE
|
|
help
|
|
The Nokia composite gadget provides support for acm, obex
|
|
and phonet in only one composite gadget driver.
|
|
|
|
It's only really useful for N900 hardware. If you're building
|
|
a kernel for N900, say Y or M here. If unsure, say N.
|
|
|
|
config USB_G_ACM_MS
|
|
tristate "CDC Composite Device (ACM and mass storage)"
|
|
depends on BLOCK
|
|
select USB_LIBCOMPOSITE
|
|
select USB_U_SERIAL
|
|
select USB_F_ACM
|
|
select USB_F_MASS_STORAGE
|
|
help
|
|
This driver provides two functions in one configuration:
|
|
a mass storage, and a CDC ACM (serial port) link.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_acm_ms".
|
|
|
|
config USB_G_MULTI
|
|
tristate "Multifunction Composite Gadget"
|
|
depends on BLOCK && NET
|
|
select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS
|
|
select USB_LIBCOMPOSITE
|
|
select USB_U_SERIAL
|
|
select USB_U_ETHER
|
|
select USB_F_ACM
|
|
select USB_F_MASS_STORAGE
|
|
help
|
|
The Multifunction Composite Gadget provides Ethernet (RNDIS
|
|
and/or CDC Ethernet), mass storage and ACM serial link
|
|
interfaces.
|
|
|
|
You will be asked to choose which of the two configurations is
|
|
to be available in the gadget. At least one configuration must
|
|
be chosen to make the gadget usable. Selecting more than one
|
|
configuration will prevent Windows from automatically detecting
|
|
the gadget as a composite gadget, so an INF file will be needed to
|
|
use the gadget.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_multi".
|
|
|
|
config USB_G_MULTI_RNDIS
|
|
bool "RNDIS + CDC Serial + Storage configuration"
|
|
depends on USB_G_MULTI
|
|
select USB_F_RNDIS
|
|
default y
|
|
help
|
|
This option enables a configuration with RNDIS, CDC Serial and
|
|
Mass Storage functions available in the Multifunction Composite
|
|
Gadget. This is the configuration dedicated for Windows since RNDIS
|
|
is Microsoft's protocol.
|
|
|
|
If unsure, say "y".
|
|
|
|
config USB_G_MULTI_CDC
|
|
bool "CDC Ethernet + CDC Serial + Storage configuration"
|
|
depends on USB_G_MULTI
|
|
select USB_F_ECM
|
|
help
|
|
This option enables a configuration with CDC Ethernet (ECM), CDC
|
|
Serial and Mass Storage functions available in the Multifunction
|
|
Composite Gadget.
|
|
|
|
If unsure, say "y".
|
|
|
|
endif # TTY
|
|
|
|
config USB_G_HID
|
|
tristate "HID Gadget"
|
|
select USB_LIBCOMPOSITE
|
|
select USB_F_HID
|
|
help
|
|
The HID gadget driver provides generic emulation of USB
|
|
Human Interface Devices (HID).
|
|
|
|
For more information, see Documentation/usb/gadget_hid.rst which
|
|
includes sample code for accessing the device files.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_hid".
|
|
|
|
# Standalone / single function gadgets
|
|
config USB_G_DBGP
|
|
tristate "EHCI Debug Device Gadget"
|
|
depends on TTY
|
|
select USB_LIBCOMPOSITE
|
|
help
|
|
This gadget emulates an EHCI Debug device. This is useful when you want
|
|
to interact with an EHCI Debug Port.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_dbgp".
|
|
|
|
if USB_G_DBGP
|
|
choice
|
|
prompt "EHCI Debug Device mode"
|
|
default USB_G_DBGP_SERIAL
|
|
|
|
config USB_G_DBGP_PRINTK
|
|
depends on USB_G_DBGP
|
|
bool "printk"
|
|
help
|
|
Directly printk() received data. No interaction.
|
|
|
|
config USB_G_DBGP_SERIAL
|
|
depends on USB_G_DBGP
|
|
select USB_U_SERIAL
|
|
bool "serial"
|
|
help
|
|
Userland can interact using /dev/ttyGSxxx.
|
|
endchoice
|
|
endif
|
|
|
|
# put drivers that need isochronous transfer support (for audio
|
|
# or video class gadget drivers), or specific hardware, here.
|
|
config USB_G_WEBCAM
|
|
tristate "USB Webcam Gadget"
|
|
depends on VIDEO_V4L2
|
|
select USB_LIBCOMPOSITE
|
|
select VIDEOBUF2_DMA_SG
|
|
select VIDEOBUF2_VMALLOC
|
|
select USB_F_UVC
|
|
help
|
|
The Webcam Gadget acts as a composite USB Audio and Video Class
|
|
device. It provides a userspace API to process UVC control requests
|
|
and stream video data to the host.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "g_webcam".
|
|
|
|
config USB_RAW_GADGET
|
|
tristate "USB Raw Gadget"
|
|
help
|
|
USB Raw Gadget is a kernel module that provides a userspace interface
|
|
for the USB Gadget subsystem. Essentially it allows to emulate USB
|
|
devices from userspace. See Documentation/usb/raw-gadget.rst for
|
|
details.
|
|
|
|
Say "y" to link the driver statically, or "m" to build a
|
|
dynamically linked module called "raw_gadget".
|
|
|
|
endmenu
|