drivers/usb/gadget/legacy/Kconfig

   1 #
   2 # USB Gadget support on a system involves
   3 #    (a) a peripheral controller, and
   4 #    (b) the gadget driver using it.
   5 #
   6 # NOTE:  Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !!
   7 #
   8 #  - Host systems (like PCs) need CONFIG_USB (with "A" jacks).
   9 #  - Peripherals (like PDAs) need CONFIG_USB_GADGET (with "B" jacks).
  10 #  - Some systems have both kinds of controllers.
  11 #
  12 # With help from a special transceiver and a "Mini-AB" jack, systems with
  13 # both kinds of controller can also support "USB On-the-Go" (CONFIG_USB_OTG).
  14 #
  15
  16 config USB_ZERO
  17         tristate "Gadget Zero (DEVELOPMENT)"
  18         select USB_LIBCOMPOSITE
  19         select USB_F_SS_LB
  20         help
  21           Gadget Zero is a two-configuration device.  It either sinks and
  22           sources bulk data; or it loops back a configurable number of
  23           transfers.  It also implements control requests, for "chapter 9"
  24           conformance.  The driver needs only two bulk-capable endpoints, so
  25           it can work on top of most device-side usb controllers.  It's
  26           useful for testing, and is also a working example showing how
  27           USB "gadget drivers" can be written.
  28
  29           Make this be the first driver you try using on top of any new
  30           USB peripheral controller driver.  Then you can use host-side
  31           test software, like the "usbtest" driver, to put your hardware
  32           and its driver through a basic set of functional tests.
  33
  34           Gadget Zero also works with the host-side "usb-skeleton" driver,
  35           and with many kinds of host-side test software.  You may need
  36           to tweak product and vendor IDs before host software knows about
  37           this device, and arrange to select an appropriate configuration.
  38
  39           Say "y" to link the driver statically, or "m" to build a
  40           dynamically linked module called "g_zero".
  41
  42 config USB_ZERO_HNPTEST
  43         bool "HNP Test Device"
  44         depends on USB_ZERO && USB_OTG
  45         help
  46           You can configure this device to enumerate using the device
  47           identifiers of the USB-OTG test device.  That means that when
  48           this gadget connects to another OTG device, with this one using
  49           the "B-Peripheral" role, that device will use HNP to let this
  50           one serve as the USB host instead (in the "B-Host" role).
  51
  52 config USB_AUDIO
  53         tristate "Audio Gadget"
  54         depends on SND
  55         select USB_LIBCOMPOSITE
  56         select SND_PCM
  57         select USB_F_UAC1 if GADGET_UAC1
  58         select USB_F_UAC2 if !GADGET_UAC1
  59         help
  60           This Gadget Audio driver is compatible with USB Audio Class
  61           specification 2.0. It implements 1 AudioControl interface,
  62           1 AudioStreaming Interface each for USB-OUT and USB-IN.
  63           Number of channels, sample rate and sample size can be
  64           specified as module parameters.
  65           This driver doesn't expect any real Audio codec to be present
  66           on the device - the audio streams are simply sinked to and
  67           sourced from a virtual ALSA sound card created. The user-space
  68           application may choose to do whatever it wants with the data
  69           received from the USB Host and choose to provide whatever it
  70           wants as audio data to the USB Host.
  71
  72           Say "y" to link the driver statically, or "m" to build a
  73           dynamically linked module called "g_audio".
  74
  75 config GADGET_UAC1
  76         bool "UAC 1.0 (Legacy)"
  77         depends on USB_AUDIO
  78         help
  79           If you instead want older UAC Spec-1.0 driver that also has audio
  80           paths hardwired to the Audio codec chip on-board and doesn't work
  81           without one.
  82
  83 config USB_ETH
  84         tristate "Ethernet Gadget (with CDC Ethernet support)"
  85         depends on NET
  86         select USB_LIBCOMPOSITE
  87         select USB_U_ETHER
  88         select USB_F_ECM
  89         select USB_F_SUBSET
  90         select CRC32
  91         help
  92           This driver implements Ethernet style communication, in one of
  93           several ways:
  94
  95            - The "Communication Device Class" (CDC) Ethernet Control Model.
  96              That protocol is often avoided with pure Ethernet adapters, in
  97              favor of simpler vendor-specific hardware, but is widely
  98              supported by firmware for smart network devices.
  99
 100            - On hardware can't implement that protocol, a simple CDC subset
 101              is used, placing fewer demands on USB.
 102
 103            - CDC Ethernet Emulation Model (EEM) is a newer standard that has
 104              a simpler interface that can be used by more USB hardware.
 105
 106           RNDIS support is an additional option, more demanding than than
 107           subset.
 108
 109           Within the USB device, this gadget driver exposes a network device
 110           "usbX", where X depends on what other networking devices you have.
 111           Treat it like a two-node Ethernet link:  host, and gadget.
 112
 113           The Linux-USB host-side "usbnet" driver interoperates with this
 114           driver, so that deep I/O queues can be supported.  On 2.4 kernels,
 115           use "CDCEther" instead, if you're using the CDC option. That CDC
 116           mode should also interoperate with standard CDC Ethernet class
 117           drivers on other host operating systems.
 118
 119           Say "y" to link the driver statically, or "m" to build a
 120           dynamically linked module called "g_ether".
 121
 122 config USB_ETH_RNDIS
 123         bool "RNDIS support"
 124         depends on USB_ETH
 125         select USB_LIBCOMPOSITE
 126         select USB_F_RNDIS
 127         default y
 128         help
 129            Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
 130            and Microsoft provides redistributable binary RNDIS drivers for
 131            older versions of Windows.
 132
 133            If you say "y" here, the Ethernet gadget driver will try to provide
 134            a second device configuration, supporting RNDIS to talk to such
 135            Microsoft USB hosts.
 136
 137            To make MS-Windows work with this, use Documentation/usb/linux.inf
 138            as the "driver info file".  For versions of MS-Windows older than
 139            XP, you'll need to download drivers from Microsoft's website; a URL
 140            is given in comments found in that info file.
 141
 142 config USB_ETH_EEM
 143        bool "Ethernet Emulation Model (EEM) support"
 144        depends on USB_ETH
 145         select USB_LIBCOMPOSITE
 146         select USB_F_EEM
 147        default n
 148        help
 149          CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
 150          and therefore can be supported by more hardware.  Technically ECM and
 151          EEM are designed for different applications.  The ECM model extends
 152          the network interface to the target (e.g. a USB cable modem), and the
 153          EEM model is for mobile devices to communicate with hosts using
 154          ethernet over USB.  For Linux gadgets, however, the interface with
 155          the host is the same (a usbX device), so the differences are minimal.
 156
 157          If you say "y" here, the Ethernet gadget driver will use the EEM
 158          protocol rather than ECM.  If unsure, say "n".
 159
 160 config USB_G_NCM
 161         tristate "Network Control Model (NCM) support"
 162         depends on NET
 163         select USB_LIBCOMPOSITE
 164         select USB_U_ETHER
 165         select USB_F_NCM
 166         select CRC32
 167         help
 168           This driver implements USB CDC NCM subclass standard. NCM is
 169           an advanced protocol for Ethernet encapsulation, allows grouping
 170           of several ethernet frames into one USB transfer and different
 171           alignment possibilities.
 172
 173           Say "y" to link the driver statically, or "m" to build a
 174           dynamically linked module called "g_ncm".
 175
 176 config USB_GADGETFS
 177         tristate "Gadget Filesystem"
 178         help
 179           This driver provides a filesystem based API that lets user mode
 180           programs implement a single-configuration USB device, including
 181           endpoint I/O and control requests that don't relate to enumeration.
 182           All endpoints, transfer speeds, and transfer types supported by
 183           the hardware are available, through read() and write() calls.
 184
 185           Say "y" to link the driver statically, or "m" to build a
 186           dynamically linked module called "gadgetfs".
 187
 188 config USB_FUNCTIONFS
 189         tristate "Function Filesystem"
 190         select USB_LIBCOMPOSITE
 191         select USB_F_FS
 192         select USB_FUNCTIONFS_GENERIC if !(USB_FUNCTIONFS_ETH || USB_FUNCTIONFS_RNDIS)
 193         help
 194           The Function Filesystem (FunctionFS) lets one create USB
 195           composite functions in user space in the same way GadgetFS
 196           lets one create USB gadgets in user space.  This allows creation
 197           of composite gadgets such that some of the functions are
 198           implemented in kernel space (for instance Ethernet, serial or
 199           mass storage) and other are implemented in user space.
 200
 201           If you say "y" or "m" here you will be able what kind of
 202           configurations the gadget will provide.
 203
 204           Say "y" to link the driver statically, or "m" to build
 205           a dynamically linked module called "g_ffs".
 206
 207 config USB_FUNCTIONFS_ETH
 208         bool "Include configuration with CDC ECM (Ethernet)"
 209         depends on USB_FUNCTIONFS && NET
 210         select USB_U_ETHER
 211         select USB_F_ECM
 212         select USB_F_SUBSET
 213         help
 214           Include a configuration with CDC ECM function (Ethernet) and the
 215           Function Filesystem.
 216
 217 config USB_FUNCTIONFS_RNDIS
 218         bool "Include configuration with RNDIS (Ethernet)"
 219         depends on USB_FUNCTIONFS && NET
 220         select USB_U_ETHER
 221         select USB_F_RNDIS
 222         help
 223           Include a configuration with RNDIS function (Ethernet) and the Filesystem.
 224
 225 config USB_FUNCTIONFS_GENERIC
 226         bool "Include 'pure' configuration"
 227         depends on USB_FUNCTIONFS
 228         help
 229           Include a configuration with the Function Filesystem alone with
 230           no Ethernet interface.
 231
 232 config USB_MASS_STORAGE
 233         tristate "Mass Storage Gadget"
 234         depends on BLOCK
 235         select USB_LIBCOMPOSITE
 236         select USB_F_MASS_STORAGE
 237         help
 238           The Mass Storage Gadget acts as a USB Mass Storage disk drive.
 239           As its storage repository it can use a regular file or a block
 240           device (in much the same way as the "loop" device driver),
 241           specified as a module parameter or sysfs option.
 242
 243           This driver is a replacement for now removed File-backed
 244           Storage Gadget (g_file_storage).
 245
 246           Say "y" to link the driver statically, or "m" to build
 247           a dynamically linked module called "g_mass_storage".
 248
 249 config USB_GADGET_TARGET
 250         tristate "USB Gadget Target Fabric Module"
 251         depends on TARGET_CORE
 252         select USB_LIBCOMPOSITE
 253         help
 254           This fabric is an USB gadget. Two USB protocols are supported that is
 255           BBB or BOT (Bulk Only Transport) and UAS (USB Attached SCSI). BOT is
 256           advertised on alternative interface 0 (primary) and UAS is on
 257           alternative interface 1. Both protocols can work on USB2.0 and USB3.0.
 258           UAS utilizes the USB 3.0 feature called streams support.
 259
 260 config USB_G_SERIAL
 261         tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
 262         depends on TTY
 263         select USB_U_SERIAL
 264         select USB_F_ACM
 265         select USB_F_SERIAL
 266         select USB_F_OBEX
 267         select USB_LIBCOMPOSITE
 268         help
 269           The Serial Gadget talks to the Linux-USB generic serial driver.
 270           This driver supports a CDC-ACM module option, which can be used
 271           to interoperate with MS-Windows hosts or with the Linux-USB
 272           "cdc-acm" driver.
 273
 274           This driver also supports a CDC-OBEX option.  You will need a
 275           user space OBEX server talking to /dev/ttyGS*, since the kernel
 276           itself doesn't implement the OBEX protocol.
 277
 278           Say "y" to link the driver statically, or "m" to build a
 279           dynamically linked module called "g_serial".
 280
 281           For more information, see Documentation/usb/gadget_serial.txt
 282           which includes instructions and a "driver info file" needed to
 283           make MS-Windows work with CDC ACM.
 284
 285 config USB_MIDI_GADGET
 286         tristate "MIDI Gadget"
 287         depends on SND
 288         select USB_LIBCOMPOSITE
 289         select SND_RAWMIDI
 290         select USB_F_MIDI
 291         help
 292           The MIDI Gadget acts as a USB Audio device, with one MIDI
 293           input and one MIDI output. These MIDI jacks appear as
 294           a sound "card" in the ALSA sound system. Other MIDI
 295           connections can then be made on the gadget system, using
 296           ALSA's aconnect utility etc.
 297
 298           Say "y" to link the driver statically, or "m" to build a
 299           dynamically linked module called "g_midi".
 300
 301 config USB_G_PRINTER
 302         tristate "Printer Gadget"
 303         select USB_LIBCOMPOSITE
 304         help
 305           The Printer Gadget channels data between the USB host and a
 306           userspace program driving the print engine. The user space
 307           program reads and writes the device file /dev/g_printer to
 308           receive or send printer data. It can use ioctl calls to
 309           the device file to get or set printer status.
 310
 311           Say "y" to link the driver statically, or "m" to build a
 312           dynamically linked module called "g_printer".
 313
 314           For more information, see Documentation/usb/gadget_printer.txt
 315           which includes sample code for accessing the device file.
 316
 317 if TTY
 318
 319 config USB_CDC_COMPOSITE
 320         tristate "CDC Composite Device (Ethernet and ACM)"
 321         depends on NET
 322         select USB_LIBCOMPOSITE
 323         select USB_U_SERIAL
 324         select USB_U_ETHER
 325         select USB_F_ACM
 326         select USB_F_ECM
 327         help
 328           This driver provides two functions in one configuration:
 329           a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link.
 330
 331           This driver requires four bulk and two interrupt endpoints,
 332           plus the ability to handle altsettings.  Not all peripheral
 333           controllers are that capable.
 334
 335           Say "y" to link the driver statically, or "m" to build a
 336           dynamically linked module.
 337
 338 config USB_G_NOKIA
 339         tristate "Nokia composite gadget"
 340         depends on PHONET
 341         select USB_LIBCOMPOSITE
 342         select USB_U_SERIAL
 343         select USB_U_ETHER
 344         select USB_F_ACM
 345         select USB_F_OBEX
 346         select USB_F_PHONET
 347         select USB_F_ECM
 348         help
 349           The Nokia composite gadget provides support for acm, obex
 350           and phonet in only one composite gadget driver.
 351
 352           It's only really useful for N900 hardware. If you're building
 353           a kernel for N900, say Y or M here. If unsure, say N.
 354
 355 config USB_G_ACM_MS
 356         tristate "CDC Composite Device (ACM and mass storage)"
 357         depends on BLOCK
 358         select USB_LIBCOMPOSITE
 359         select USB_U_SERIAL
 360         select USB_F_ACM
 361         select USB_F_MASS_STORAGE
 362         help
 363           This driver provides two functions in one configuration:
 364           a mass storage, and a CDC ACM (serial port) link.
 365
 366           Say "y" to link the driver statically, or "m" to build a
 367           dynamically linked module called "g_acm_ms".
 368
 369 config USB_G_MULTI
 370         tristate "Multifunction Composite Gadget"
 371         depends on BLOCK && NET
 372         select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS
 373         select USB_LIBCOMPOSITE
 374         select USB_U_SERIAL
 375         select USB_U_ETHER
 376         select USB_F_ACM
 377         select USB_F_MASS_STORAGE
 378         help
 379           The Multifunction Composite Gadget provides Ethernet (RNDIS
 380           and/or CDC Ethernet), mass storage and ACM serial link
 381           interfaces.
 382
 383           You will be asked to choose which of the two configurations is
 384           to be available in the gadget.  At least one configuration must
 385           be chosen to make the gadget usable.  Selecting more than one
 386           configuration will prevent Windows from automatically detecting
 387           the gadget as a composite gadget, so an INF file will be needed to
 388           use the gadget.
 389
 390           Say "y" to link the driver statically, or "m" to build a
 391           dynamically linked module called "g_multi".
 392
 393 config USB_G_MULTI_RNDIS
 394         bool "RNDIS + CDC Serial + Storage configuration"
 395         depends on USB_G_MULTI
 396         select USB_F_RNDIS
 397         default y
 398         help
 399           This option enables a configuration with RNDIS, CDC Serial and
 400           Mass Storage functions available in the Multifunction Composite
 401           Gadget.  This is the configuration dedicated for Windows since RNDIS
 402           is Microsoft's protocol.
 403
 404           If unsure, say "y".
 405
 406 config USB_G_MULTI_CDC
 407         bool "CDC Ethernet + CDC Serial + Storage configuration"
 408         depends on USB_G_MULTI
 409         default n
 410         select USB_F_ECM
 411         help
 412           This option enables a configuration with CDC Ethernet (ECM), CDC
 413           Serial and Mass Storage functions available in the Multifunction
 414           Composite Gadget.
 415
 416           If unsure, say "y".
 417
 418 endif # TTY
 419
 420 config USB_G_HID
 421         tristate "HID Gadget"
 422         select USB_LIBCOMPOSITE
 423         select USB_F_HID
 424         help
 425           The HID gadget driver provides generic emulation of USB
 426           Human Interface Devices (HID).
 427
 428           For more information, see Documentation/usb/gadget_hid.txt which
 429           includes sample code for accessing the device files.
 430
 431           Say "y" to link the driver statically, or "m" to build a
 432           dynamically linked module called "g_hid".
 433
 434 # Standalone / single function gadgets
 435 config USB_G_DBGP
 436         tristate "EHCI Debug Device Gadget"
 437         depends on TTY
 438         select USB_LIBCOMPOSITE
 439         help
 440           This gadget emulates an EHCI Debug device. This is useful when you want
 441           to interact with an EHCI Debug Port.
 442
 443           Say "y" to link the driver statically, or "m" to build a
 444           dynamically linked module called "g_dbgp".
 445
 446 if USB_G_DBGP
 447 choice
 448         prompt "EHCI Debug Device mode"
 449         default USB_G_DBGP_SERIAL
 450
 451 config USB_G_DBGP_PRINTK
 452         depends on USB_G_DBGP
 453         bool "printk"
 454         help
 455           Directly printk() received data. No interaction.
 456
 457 config USB_G_DBGP_SERIAL
 458         depends on USB_G_DBGP
 459         select USB_U_SERIAL
 460         bool "serial"
 461         help
 462           Userland can interact using /dev/ttyGSxxx.
 463 endchoice
 464 endif
 465
 466 # put drivers that need isochronous transfer support (for audio
 467 # or video class gadget drivers), or specific hardware, here.
 468 config USB_G_WEBCAM
 469         tristate "USB Webcam Gadget"
 470         depends on VIDEO_DEV
 471         select USB_LIBCOMPOSITE
 472         select VIDEOBUF2_VMALLOC
 473         select USB_F_UVC
 474         help
 475           The Webcam Gadget acts as a composite USB Audio and Video Class
 476           device. It provides a userspace API to process UVC control requests
 477           and stream video data to the host.
 478
 479           Say "y" to link the driver statically, or "m" to build a
 480           dynamically linked module called "g_webcam".