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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 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).
#
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 "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
        boolean "Debugging messages"
        depends on USB_GADGET && DEBUG_KERNEL && EXPERIMENTAL
        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_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".

config USB_GADGET_DEBUG_FS
        boolean "Debugging information files in debugfs"
        depends on USB_GADGET && 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_SELECTED
        boolean

#
# 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_AMD5536UDC
        boolean "AMD5536 UDC"
        depends on PCI
        select USB_GADGET_DUALSPEED
        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_AMD5536UDC
        tristate
        depends on USB_GADGET_AMD5536UDC
        default USB_GADGET
        select USB_GADGET_SELECTED

config USB_GADGET_ATMEL_USBA
        boolean "Atmel USBA"
        select USB_GADGET_DUALSPEED
        depends on AVR32
        help
          USBA is the integrated high-speed USB Device controller on
          the AT32AP700x processors from Atmel.

config USB_ATMEL_USBA
        tristate
        depends on USB_GADGET_ATMEL_USBA
        default USB_GADGET
        select USB_GADGET_SELECTED

config USB_GADGET_FSL_USB2
        boolean "Freescale Highspeed USB DR Peripheral Controller"
        depends on MPC834x || PPC_MPC831x
        select USB_GADGET_DUALSPEED
        help
           Some of Freescale PowerPC 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_FSL_USB2
        tristate
        depends on USB_GADGET_FSL_USB2
        default USB_GADGET
        select USB_GADGET_SELECTED

config USB_GADGET_NET2280
        boolean "NetChip 228x"
        depends on PCI
        select USB_GADGET_DUALSPEED
        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_NET2280
        tristate
        depends on USB_GADGET_NET2280
        default USB_GADGET
        select USB_GADGET_SELECTED

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
        select USB_GADGET_SELECTED

# 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_M66592
        boolean "Renesas M66592 USB Peripheral Controller"
        select USB_GADGET_DUALSPEED
        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.

config USB_M66592
        tristate
        depends on USB_GADGET_M66592
        default USB_GADGET
        select USB_GADGET_SELECTED

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
        select USB_GADGET_SELECTED


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
        select USB_GADGET_SELECTED

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
        select USB_GADGET_SELECTED

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_S3C2410
        boolean "S3C2410 USB Device Controller"
        depends on ARCH_S3C2410
        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
        tristate
        depends on USB_GADGET_S3C2410
        default USB_GADGET
        select USB_GADGET_SELECTED

config USB_S3C2410_DEBUG
        boolean "S3C2410 udc debug messages"
        depends on USB_GADGET_S3C2410

config USB_GADGET_AT91
        boolean "AT91 USB Device Port"
        depends on ARCH_AT91 && !ARCH_AT91SAM9RL
        select USB_GADGET_SELECTED
        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_AT91
        tristate
        depends on USB_GADGET_AT91
        default USB_GADGET

config USB_GADGET_DUMMY_HCD
        boolean "Dummy HCD (DEVELOPMENT)"
        depends on (USB=y || (USB=m && USB_GADGET=m)) && 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
        select USB_GADGET_SELECTED

# 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 && USB_GADGET_SELECTED
        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"
        depends on BLOCK
        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.

config USB_MIDI_GADGET
        tristate "MIDI Gadget (EXPERIMENTAL)"
        depends on SND && EXPERIMENTAL
        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".


# put drivers that need isochronous transfer support (for audio
# or video class gadget drivers), or specific hardware, here.

# - none yet

endchoice

endmenu