# # 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). # menuconfig USB_GADGET tristate "USB Gadget Support" select NLS help USB is a master/slave protocol, organized with one master host (such as a PC) controlling up to 127 peripheral devices. The USB hardware is asymmetric, which makes it easier to set up: you can't connect a "to-the-host" connector to a peripheral. Linux can run in the host, or in the peripheral. In both cases you need a low level bus controller driver, and some software talking to it. Peripheral controllers are often discrete silicon, or are integrated with the CPU in a microcontroller. The more familiar host side controllers have names like "EHCI", "OHCI", or "UHCI", and are usually integrated into southbridges on PC motherboards. Enable this configuration option if you want to run Linux inside a USB peripheral device. Configure one hardware driver for your peripheral/device side bus controller, and a "gadget driver" for your peripheral protocol. (If you use modular gadget drivers, you may configure more than one.) If in doubt, say "N" and don't enable these drivers; most people don't have this kind of hardware (except maybe inside Linux PDAs). For more information, see <http://www.linux-usb.org/gadget> and the kernel DocBook documentation for this API. if USB_GADGET config USB_GADGET_DEBUG boolean "Debugging messages (DEVELOPMENT)" depends on DEBUG_KERNEL help Many controller and gadget drivers will print some debugging messages if you use this option to ask for those messages. Avoid enabling these messages, even if you're actively debugging such a driver. Many drivers will emit so many messages that the driver timings are affected, which will either create new failure modes or remove the one you're trying to track down. Never enable these messages for a production build. config USB_GADGET_VERBOSE bool "Verbose debugging Messages (DEVELOPMENT)" depends on USB_GADGET_DEBUG help Many controller and gadget drivers will print verbose debugging messages if you use this option to ask for those messages. Avoid enabling these messages, even if you're actively debugging such a driver. Many drivers will emit so many messages that the driver timings are affected, which will either create new failure modes or remove the one you're trying to track down. Never enable these messages for a production build. config USB_GADGET_DEBUG_FILES boolean "Debugging information files (DEVELOPMENT)" depends on PROC_FS help Some of the drivers in the "gadget" framework can expose debugging information in files such as /proc/driver/udc (for a peripheral controller). The information in these files may help when you're troubleshooting or bringing up a driver on a new board. Enable these files by choosing "Y" here. If in doubt, or to conserve kernel memory, say "N". config USB_GADGET_DEBUG_FS boolean "Debugging information files in debugfs (DEVELOPMENT)" depends on DEBUG_FS help Some of the drivers in the "gadget" framework can expose debugging information in files under /sys/kernel/debug/. The information in these files may help when you're troubleshooting or bringing up a driver on a new board. Enable these files by choosing "Y" here. If in doubt, or to conserve kernel memory, say "N". config USB_GADGET_VBUS_DRAW int "Maximum VBUS Power usage (2-500 mA)" range 2 500 default 2 help Some devices need to draw power from USB when they are configured, perhaps to operate circuitry or to recharge batteries. This is in addition to any local power supply, such as an AC adapter or batteries. Enter the maximum power your device draws through USB, in milliAmperes. The permitted range of values is 2 - 500 mA; 0 mA would be legal, but can make some hosts misbehave. This value will be used except for system-specific gadget drivers that have more specific information. config USB_GADGET_STORAGE_NUM_BUFFERS int "Number of storage pipeline buffers" range 2 4 default 2 help Usually 2 buffers are enough to establish a good buffering pipeline. The number may be increased in order to compensate for a bursty VFS behaviour. For instance there may be CPU wake up latencies that makes the VFS to appear bursty in a system with an CPU on-demand governor. Especially if DMA is doing IO to offload the CPU. In this case the CPU will go into power save often and spin up occasionally to move data within VFS. If selecting USB_GADGET_DEBUG_FILES this value may be set by a module parameter as well. If unsure, say 2. # # USB Peripheral Controller Support # # The order here is alphabetical, except that integrated controllers go # before discrete ones so they will be the initial/default value: # - integrated/SOC controllers first # - licensed IP used in both SOC and discrete versions # - discrete ones (including all PCI-only controllers) # - debug/dummy gadget+hcd is last. # menu "USB Peripheral Controller" # # Integrated controllers # config USB_AT91 tristate "Atmel AT91 USB Device Port" depends on ARCH_AT91 help Many Atmel AT91 processors (such as the AT91RM2000) have a full speed USB Device Port with support for five configurable endpoints (plus endpoint zero). Say "y" to link the driver statically, or "m" to build a dynamically linked module called "at91_udc" and force all gadget drivers to also be dynamically linked. config USB_LPC32XX tristate "LPC32XX USB Peripheral Controller" depends on ARCH_LPC32XX select USB_ISP1301 help This option selects the USB device controller in the LPC32xx SoC. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "lpc32xx_udc" and force all gadget drivers to also be dynamically linked. config USB_ATMEL_USBA tristate "Atmel USBA" depends on AVR32 || ARCH_AT91 help USBA is the integrated high-speed USB Device controller on the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel. config USB_BCM63XX_UDC tristate "Broadcom BCM63xx Peripheral Controller" depends on BCM63XX help Many Broadcom BCM63xx chipsets (such as the BCM6328) have a high speed USB Device Port with support for four fixed endpoints (plus endpoint zero). Say "y" to link the driver statically, or "m" to build a dynamically linked module called "bcm63xx_udc". config USB_FSL_USB2 tristate "Freescale Highspeed USB DR Peripheral Controller" depends on FSL_SOC || ARCH_MXC select USB_FSL_MPH_DR_OF if OF help Some of Freescale PowerPC and i.MX processors have a High Speed Dual-Role(DR) USB controller, which supports device mode. The number of programmable endpoints is different through SOC revisions. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "fsl_usb2_udc" and force all gadget drivers to also be dynamically linked. config USB_FUSB300 tristate "Faraday FUSB300 USB Peripheral Controller" depends on !PHYS_ADDR_T_64BIT && HAS_DMA help Faraday usb device controller FUSB300 driver config USB_FOTG210_UDC depends on HAS_DMA tristate "Faraday FOTG210 USB Peripheral Controller" help Faraday USB2.0 OTG controller which can be configured as high speed or full speed USB device. This driver supppors Bulk Transfer so far. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "fotg210_udc". config USB_GR_UDC tristate "Aeroflex Gaisler GRUSBDC USB Peripheral Controller Driver" depends on HAS_DMA help Select this to support Aeroflex Gaisler GRUSBDC cores from the GRLIB VHDL IP core library. config USB_OMAP tristate "OMAP USB Device Controller" depends on ARCH_OMAP1 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3 help Many Texas Instruments OMAP processors have flexible full speed USB device controllers, with support for up to 30 endpoints (plus endpoint zero). This driver supports the controller in the OMAP 1611, and should work with controllers in other OMAP processors too, given minor tweaks. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "omap_udc" and force all gadget drivers to also be dynamically linked. config USB_PXA25X tristate "PXA 25x or IXP 4xx" depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX help Intel's PXA 25x series XScale ARM-5TE processors include an integrated full speed USB 1.1 device controller. The controller in the IXP 4xx series is register-compatible. It has fifteen fixed-function endpoints, as well as endpoint zero (for control transfers). Say "y" to link the driver statically, or "m" to build a dynamically linked module called "pxa25x_udc" and force all gadget drivers to also be dynamically linked. # if there's only one gadget driver, using only two bulk endpoints, # don't waste memory for the other endpoints config USB_PXA25X_SMALL depends on USB_PXA25X bool default n if USB_ETH_RNDIS default y if USB_ZERO default y if USB_ETH default y if USB_G_SERIAL config USB_R8A66597 tristate "Renesas R8A66597 USB Peripheral Controller" depends on HAS_DMA help R8A66597 is a discrete USB host and peripheral controller chip that supports both full and high speed USB 2.0 data transfers. It has nine configurable endpoints, and endpoint zero. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "r8a66597_udc" and force all gadget drivers to also be dynamically linked. config USB_RENESAS_USBHS_UDC tristate 'Renesas USBHS controller' depends on USB_RENESAS_USBHS help Renesas USBHS is a discrete USB host and peripheral controller chip that supports both full and high speed USB 2.0 data transfers. It has nine or more configurable endpoints, and endpoint zero. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "renesas_usbhs" and force all gadget drivers to also be dynamically linked. config USB_PXA27X tristate "PXA 27x" help Intel's PXA 27x series XScale ARM v5TE processors include an integrated full speed USB 1.1 device controller. It has up to 23 endpoints, as well as endpoint zero (for control transfers). Say "y" to link the driver statically, or "m" to build a dynamically linked module called "pxa27x_udc" and force all gadget drivers to also be dynamically linked. config USB_S3C_HSOTG tristate "Designware/S3C HS/OtG USB Device controller" help The Designware USB2.0 high-speed gadget controller integrated into many SoCs. config USB_S3C2410 tristate "S3C2410 USB Device Controller" depends on ARCH_S3C24XX help Samsung's S3C2410 is an ARM-4 processor with an integrated full speed USB 1.1 device controller. It has 4 configurable endpoints, as well as endpoint zero (for control transfers). This driver has been tested on the S3C2410, S3C2412, and S3C2440 processors. config USB_S3C2410_DEBUG boolean "S3C2410 udc debug messages" depends on USB_S3C2410 config USB_S3C_HSUDC tristate "S3C2416, S3C2443 and S3C2450 USB Device Controller" depends on ARCH_S3C24XX help Samsung's S3C2416, S3C2443 and S3C2450 is an ARM9 based SoC integrated with dual speed USB 2.0 device controller. It has 8 endpoints, as well as endpoint zero. This driver has been tested on S3C2416 and S3C2450 processors. config USB_MV_UDC tristate "Marvell USB2.0 Device Controller" depends on HAS_DMA help Marvell Socs (including PXA and MMP series) include a high speed USB2.0 OTG controller, which can be configured as high speed or full speed USB peripheral. config USB_MV_U3D depends on HAS_DMA tristate "MARVELL PXA2128 USB 3.0 controller" help MARVELL PXA2128 Processor series include a super speed USB3.0 device controller, which support super speed USB peripheral. # # Controllers available in both integrated and discrete versions # config USB_M66592 tristate "Renesas M66592 USB Peripheral Controller" help M66592 is a discrete USB peripheral controller chip that supports both full and high speed USB 2.0 data transfers. It has seven configurable endpoints, and endpoint zero. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "m66592_udc" and force all gadget drivers to also be dynamically linked. # # Controllers available only in discrete form (and all PCI controllers) # config USB_AMD5536UDC tristate "AMD5536 UDC" depends on PCI help The AMD5536 UDC is part of the AMD Geode CS5536, an x86 southbridge. It is a USB Highspeed DMA capable USB device controller. Beside ep0 it provides 4 IN and 4 OUT endpoints (bulk or interrupt type). The UDC port supports OTG operation, and may be used as a host port if it's not being used to implement peripheral or OTG roles. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "amd5536udc" and force all gadget drivers to also be dynamically linked. config USB_FSL_QE tristate "Freescale QE/CPM USB Device Controller" depends on FSL_SOC && (QUICC_ENGINE || CPM) help Some of Freescale PowerPC processors have a Full Speed QE/CPM2 USB controller, which support device mode with 4 programmable endpoints. This driver supports the controller in the MPC8360 and MPC8272, and should work with controllers having QE or CPM2, given minor tweaks. Set CONFIG_USB_GADGET to "m" to build this driver as a dynamically linked module called "fsl_qe_udc". config USB_NET2272 tristate "PLX NET2272" help PLX NET2272 is a USB peripheral controller which supports both full and high speed USB 2.0 data transfers. It has three configurable endpoints, as well as endpoint zero (for control transfer). Say "y" to link the driver statically, or "m" to build a dynamically linked module called "net2272" and force all gadget drivers to also be dynamically linked. config USB_NET2272_DMA boolean "Support external DMA controller" depends on USB_NET2272 && HAS_DMA help The NET2272 part can optionally support an external DMA controller, but your board has to have support in the driver itself. If unsure, say "N" here. The driver works fine in PIO mode. config USB_NET2280 tristate "NetChip 228x" depends on PCI help NetChip 2280 / 2282 is a PCI based USB peripheral controller which supports both full and high speed USB 2.0 data transfers. It has six configurable endpoints, as well as endpoint zero (for control transfers) and several endpoints with dedicated functions. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "net2280" and force all gadget drivers to also be dynamically linked. config USB_GOKU tristate "Toshiba TC86C001 'Goku-S'" depends on PCI help The Toshiba TC86C001 is a PCI device which includes controllers for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI). The device controller has three configurable (bulk or interrupt) endpoints, plus endpoint zero (for control transfers). Say "y" to link the driver statically, or "m" to build a dynamically linked module called "goku_udc" and to force all gadget drivers to also be dynamically linked. config USB_EG20T tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7831) UDC" depends on PCI help This is a USB device driver for EG20T PCH. EG20T PCH is the platform controller hub that is used in Intel's general embedded platform. EG20T PCH has USB device interface. Using this interface, it is able to access system devices connected to USB device. This driver enables USB device function. USB device is a USB peripheral controller which supports both full and high speed USB 2.0 data transfers. This driver supports both control transfer and bulk transfer modes. This driver dose not support interrupt transfer or isochronous transfer modes. This driver also can be used for LAPIS Semiconductor's ML7213 which is for IVI(In-Vehicle Infotainment) use. ML7831 is for general purpose use. ML7213/ML7831 is companion chip for Intel Atom E6xx series. ML7213/ML7831 is completely compatible for Intel EG20T PCH. # # LAST -- dummy/emulated controller # config USB_DUMMY_HCD tristate "Dummy HCD (DEVELOPMENT)" depends on USB=y || (USB=m && USB_GADGET=m) help This host controller driver emulates USB, looping all data transfer requests back to a USB "gadget driver" in the same host. The host side is the master; the gadget side is the slave. Gadget drivers can be high, full, or low speed; and they have access to endpoints like those from NET2280, PXA2xx, or SA1100 hardware. This may help in some stages of creating a driver to embed in a Linux device, since it lets you debug several parts of the gadget driver without its hardware or drivers being involved. Since such a gadget side driver needs to interoperate with a host side Linux-USB device driver, this may help to debug both sides of a USB protocol stack. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "dummy_hcd" and force all gadget drivers to also be dynamically linked. # NOTE: Please keep dummy_hcd LAST so that "real hardware" appears # first and will be selected by default. endmenu # # USB Gadget Drivers # # composite based drivers config USB_LIBCOMPOSITE tristate select CONFIGFS_FS depends on USB_GADGET config USB_F_ACM tristate config USB_F_SS_LB tristate config USB_U_SERIAL tristate config USB_U_ETHER tristate config USB_F_SERIAL tristate config USB_F_OBEX tristate config USB_F_NCM tristate config USB_F_ECM tristate config USB_F_PHONET tristate config USB_F_EEM tristate config USB_F_SUBSET tristate config USB_F_RNDIS tristate config USB_F_MASS_STORAGE tristate config USB_F_FS tristate choice tristate "USB Gadget Drivers" default USB_ETH help 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. # this first set of drivers all depend on bulk-capable hardware. config USB_CONFIGFS tristate "USB functions configurable through configfs" select USB_LIBCOMPOSITE help A Linux USB "gadget" can be set up through configfs. If this is the case, the USB functions (which from the host's perspective are seen as interfaces) and configurations are specified simply by creating appropriate directories in configfs. Associating functions with configurations is done by creating appropriate symbolic links. For more information see Documentation/usb/gadget_configfs.txt. config USB_CONFIGFS_SERIAL boolean "Generic serial bulk in/out" depends on USB_CONFIGFS depends on TTY select USB_U_SERIAL select USB_F_SERIAL help The function talks to the Linux-USB generic serial driver. config USB_CONFIGFS_ACM boolean "Abstract Control Model (CDC ACM)" depends on USB_CONFIGFS depends on TTY select USB_U_SERIAL select USB_F_ACM help ACM serial link. This function can be used to interoperate with MS-Windows hosts or with the Linux-USB "cdc-acm" driver. config USB_CONFIGFS_OBEX boolean "Object Exchange Model (CDC OBEX)" depends on USB_CONFIGFS depends on TTY select USB_U_SERIAL select USB_F_OBEX help You will need a user space OBEX server talking to /dev/ttyGS*, since the kernel itself doesn't implement the OBEX protocol. config USB_CONFIGFS_NCM boolean "Network Control Model (CDC NCM)" depends on USB_CONFIGFS depends on NET select USB_U_ETHER select USB_F_NCM help NCM is an advanced protocol for Ethernet encapsulation, allows grouping of several ethernet frames into one USB transfer and different alignment possibilities. config USB_CONFIGFS_ECM boolean "Ethernet Control Model (CDC ECM)" depends on USB_CONFIGFS depends on NET select USB_U_ETHER select USB_F_ECM help 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. config USB_CONFIGFS_ECM_SUBSET boolean "Ethernet Control Model (CDC ECM) subset" depends on USB_CONFIGFS depends on NET select USB_U_ETHER select USB_F_SUBSET help On hardware that can't implement the full protocol, a simple CDC subset is used, placing fewer demands on USB. config USB_CONFIGFS_RNDIS bool "RNDIS" depends on USB_CONFIGFS depends on NET select USB_U_ETHER select USB_F_RNDIS help Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol, and Microsoft provides redistributable binary RNDIS drivers for older versions of Windows. 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_CONFIGFS_EEM bool "Ethernet Emulation Model (EEM)" depends on USB_CONFIGFS depends on NET select USB_U_ETHER 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. config USB_CONFIGFS_PHONET boolean "Phonet protocol" depends on USB_CONFIGFS depends on NET depends on PHONET select USB_U_ETHER select USB_F_PHONET help The Phonet protocol implementation for USB device. config USB_CONFIGFS_MASS_STORAGE boolean "Mass storage" depends on USB_CONFIGFS depends on BLOCK 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. config USB_CONFIGFS_F_LB_SS boolean "Loopback and sourcesink function (for testing)" depends on USB_CONFIGFS select USB_F_SS_LB help Loopback function loops back a configurable number of transfers. Sourcesink function either sinks and sources bulk data. It also implements control requests, for "chapter 9" conformance. 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. config USB_CONFIGFS_F_FS boolean "Function filesystem (FunctionFS)" depends on USB_CONFIGFS select USB_F_FS 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. 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 boolean "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 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 (Legacy)" depends on USB_AUDIO help If you instead want older 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 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 default n 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 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.txt 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 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 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.txt 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 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 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 default n 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 help The HID gadget driver provides generic emulation of USB Human Interface Devices (HID). For more information, see Documentation/usb/gadget_hid.txt 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_DEV 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. Say "y" to link the driver statically, or "m" to build a dynamically linked module called "g_webcam". endchoice endif # USB_GADGET