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+#
+# 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 of controller.
+#
+# 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).
+#
+menu "USB Gadget Support"
+
+config USB_GADGET
+ tristate "Support for USB Gadgets"
+ 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 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.
+
+config USB_GADGET_DEBUG_FILES
+ boolean "Debugging information files"
+ depends on USB_GADGET && 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".
+
+#
+# USB Peripheral Controller Support
+#
+choice
+ prompt "USB Peripheral Controller"
+ depends on USB_GADGET
+ help
+ A USB device uses a controller to talk to its host.
+ Systems should have only one such upstream link.
+ Many controller drivers are platform-specific; these
+ often need board-specific hooks.
+
+config USB_GADGET_NET2280
+ boolean "NetChip 2280"
+ depends on PCI
+ select USB_GADGET_DUALSPEED
+ help
+ NetChip 2280 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_NET2280
+ tristate
+ depends on USB_GADGET_NET2280
+ default USB_GADGET
+
+config USB_GADGET_PXA2XX
+ boolean "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 "pxa2xx_udc" and force all
+ gadget drivers to also be dynamically linked.
+
+config USB_PXA2XX
+ tristate
+ depends on USB_GADGET_PXA2XX
+ default USB_GADGET
+
+# if there's only one gadget driver, using only two bulk endpoints,
+# don't waste memory for the other endpoints
+config USB_PXA2XX_SMALL
+ depends on USB_GADGET_PXA2XX
+ 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_GADGET_GOKU
+ boolean "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_GOKU
+ tristate
+ depends on USB_GADGET_GOKU
+ default USB_GADGET
+
+
+config USB_GADGET_LH7A40X
+ boolean "LH7A40X"
+ depends on ARCH_LH7A40X
+ help
+ This driver provides USB Device Controller driver for LH7A40x
+
+config USB_LH7A40X
+ tristate
+ depends on USB_GADGET_LH7A40X
+ default USB_GADGET
+
+
+config USB_GADGET_OMAP
+ boolean "OMAP USB Device Controller"
+ depends on ARCH_OMAP
+ 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_OMAP
+ tristate
+ depends on USB_GADGET_OMAP
+ default USB_GADGET
+
+config USB_OTG
+ boolean "OTG Support"
+ depends on USB_GADGET_OMAP && ARCH_OMAP_OTG && USB_OHCI_HCD
+ help
+ The most notable feature of USB OTG is support for a
+ "Dual-Role" device, which can act as either a device
+ or a host. The initial role choice can be changed
+ later, when two dual-role devices talk to each other.
+
+ Select this only if your OMAP board has a Mini-AB connector.
+
+
+config USB_GADGET_DUMMY_HCD
+ boolean "Dummy HCD (DEVELOPMENT)"
+ depends on USB && EXPERIMENTAL
+ select USB_GADGET_DUALSPEED
+ 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.
+
+config USB_DUMMY_HCD
+ tristate
+ depends on USB_GADGET_DUMMY_HCD
+ default USB_GADGET
+
+# NOTE: Please keep dummy_hcd LAST so that "real hardware" appears
+# first and will be selected by default.
+
+endchoice
+
+config USB_GADGET_DUALSPEED
+ bool
+ depends on USB_GADGET
+ default n
+ help
+ Means that gadget drivers should include extra descriptors
+ and code to handle dual-speed controllers.
+
+#
+# USB Gadget Drivers
+#
+choice
+ tristate "USB Gadget Drivers"
+ depends on USB_GADGET
+ 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_ZERO
+ tristate "Gadget Zero (DEVELOPMENT)"
+ depends on EXPERIMENTAL
+ 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_ETH
+ tristate "Ethernet Gadget (with CDC Ethernet support)"
+ depends on NET
+ help
+ This driver implements Ethernet style communication, in either
+ of two 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.
+
+ RNDIS support is a third option, more demanding than that 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 (EXPERIMENTAL)"
+ depends on USB_ETH && EXPERIMENTAL
+ 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_GADGETFS
+ tristate "Gadget Filesystem (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ 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_FILE_STORAGE
+ tristate "File-backed Storage Gadget"
+ help
+ The File-backed 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.
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "g_file_storage".
+
+config USB_FILE_STORAGE_TEST
+ bool "File-backed Storage Gadget testing version"
+ depends on USB_FILE_STORAGE
+ default n
+ help
+ Say "y" to generate the larger testing version of the
+ File-backed Storage Gadget, useful for probing the
+ behavior of USB Mass Storage hosts. Not needed for
+ normal operation.
+
+config USB_G_SERIAL
+ tristate "Serial Gadget (with CDC ACM support)"
+ 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.
+
+ 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 this driver.
+
+
+# put drivers that need isochronous transfer support (for audio
+# or video class gadget drivers), or specific hardware, here.
+
+# - none yet
+
+endchoice
+
+endmenu