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