2 # USB Gadget support on a system involves
3 # (a) a peripheral controller, and
4 # (b) the gadget driver using it.
6 # NOTE: Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !!
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.
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).
17 tristate "USB Gadget Support"
20 USB is a master/slave protocol, organized with one master
21 host (such as a PC) controlling up to 127 peripheral devices.
22 The USB hardware is asymmetric, which makes it easier to set up:
23 you can't connect a "to-the-host" connector to a peripheral.
25 Linux can run in the host, or in the peripheral. In both cases
26 you need a low level bus controller driver, and some software
27 talking to it. Peripheral controllers are often discrete silicon,
28 or are integrated with the CPU in a microcontroller. The more
29 familiar host side controllers have names like "EHCI", "OHCI",
30 or "UHCI", and are usually integrated into southbridges on PC
33 Enable this configuration option if you want to run Linux inside
34 a USB peripheral device. Configure one hardware driver for your
35 peripheral/device side bus controller, and a "gadget driver" for
36 your peripheral protocol. (If you use modular gadget drivers,
37 you may configure more than one.)
39 If in doubt, say "N" and don't enable these drivers; most people
40 don't have this kind of hardware (except maybe inside Linux PDAs).
42 For more information, see <http://www.linux-usb.org/gadget> and
43 the kernel DocBook documentation for this API.
47 config USB_GADGET_DEBUG
48 boolean "Debugging messages (DEVELOPMENT)"
49 depends on DEBUG_KERNEL
51 Many controller and gadget drivers will print some debugging
52 messages if you use this option to ask for those messages.
54 Avoid enabling these messages, even if you're actively
55 debugging such a driver. Many drivers will emit so many
56 messages that the driver timings are affected, which will
57 either create new failure modes or remove the one you're
58 trying to track down. Never enable these messages for a
61 config USB_GADGET_VERBOSE
62 bool "Verbose debugging Messages (DEVELOPMENT)"
63 depends on USB_GADGET_DEBUG
65 Many controller and gadget drivers will print verbose debugging
66 messages if you use this option to ask for those messages.
68 Avoid enabling these messages, even if you're actively
69 debugging such a driver. Many drivers will emit so many
70 messages that the driver timings are affected, which will
71 either create new failure modes or remove the one you're
72 trying to track down. Never enable these messages for a
75 config USB_GADGET_DEBUG_FILES
76 boolean "Debugging information files (DEVELOPMENT)"
79 Some of the drivers in the "gadget" framework can expose
80 debugging information in files such as /proc/driver/udc
81 (for a peripheral controller). The information in these
82 files may help when you're troubleshooting or bringing up a
83 driver on a new board. Enable these files by choosing "Y"
84 here. If in doubt, or to conserve kernel memory, say "N".
86 config USB_GADGET_DEBUG_FS
87 boolean "Debugging information files in debugfs (DEVELOPMENT)"
90 Some of the drivers in the "gadget" framework can expose
91 debugging information in files under /sys/kernel/debug/.
92 The information in these files may help when you're
93 troubleshooting or bringing up a driver on a new board.
94 Enable these files by choosing "Y" here. If in doubt, or
95 to conserve kernel memory, say "N".
97 config USB_GADGET_VBUS_DRAW
98 int "Maximum VBUS Power usage (2-500 mA)"
102 Some devices need to draw power from USB when they are
103 configured, perhaps to operate circuitry or to recharge
104 batteries. This is in addition to any local power supply,
105 such as an AC adapter or batteries.
107 Enter the maximum power your device draws through USB, in
108 milliAmperes. The permitted range of values is 2 - 500 mA;
109 0 mA would be legal, but can make some hosts misbehave.
111 This value will be used except for system-specific gadget
112 drivers that have more specific information.
114 config USB_GADGET_STORAGE_NUM_BUFFERS
115 int "Number of storage pipeline buffers"
119 Usually 2 buffers are enough to establish a good buffering
120 pipeline. The number may be increased in order to compensate
121 for a bursty VFS behaviour. For instance there may be CPU wake up
122 latencies that makes the VFS to appear bursty in a system with
123 an CPU on-demand governor. Especially if DMA is doing IO to
124 offload the CPU. In this case the CPU will go into power
125 save often and spin up occasionally to move data within VFS.
126 If selecting USB_GADGET_DEBUG_FILES this value may be set by
127 a module parameter as well.
131 # USB Peripheral Controller Support
133 # The order here is alphabetical, except that integrated controllers go
134 # before discrete ones so they will be the initial/default value:
135 # - integrated/SOC controllers first
136 # - licensed IP used in both SOC and discrete versions
137 # - discrete ones (including all PCI-only controllers)
138 # - debug/dummy gadget+hcd is last.
140 menu "USB Peripheral Controller"
143 # Integrated controllers
147 tristate "Atmel AT91 USB Device Port"
150 Many Atmel AT91 processors (such as the AT91RM2000) have a
151 full speed USB Device Port with support for five configurable
152 endpoints (plus endpoint zero).
154 Say "y" to link the driver statically, or "m" to build a
155 dynamically linked module called "at91_udc" and force all
156 gadget drivers to also be dynamically linked.
159 tristate "LPC32XX USB Peripheral Controller"
160 depends on ARCH_LPC32XX
163 This option selects the USB device controller in the LPC32xx SoC.
165 Say "y" to link the driver statically, or "m" to build a
166 dynamically linked module called "lpc32xx_udc" and force all
167 gadget drivers to also be dynamically linked.
169 config USB_ATMEL_USBA
170 tristate "Atmel USBA"
171 depends on AVR32 || ARCH_AT91
173 USBA is the integrated high-speed USB Device controller on
174 the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel.
176 config USB_BCM63XX_UDC
177 tristate "Broadcom BCM63xx Peripheral Controller"
180 Many Broadcom BCM63xx chipsets (such as the BCM6328) have a
181 high speed USB Device Port with support for four fixed endpoints
182 (plus endpoint zero).
184 Say "y" to link the driver statically, or "m" to build a
185 dynamically linked module called "bcm63xx_udc".
188 tristate "Freescale Highspeed USB DR Peripheral Controller"
189 depends on FSL_SOC || ARCH_MXC
190 select USB_FSL_MPH_DR_OF if OF
192 Some of Freescale PowerPC and i.MX processors have a High Speed
193 Dual-Role(DR) USB controller, which supports device mode.
195 The number of programmable endpoints is different through
198 Say "y" to link the driver statically, or "m" to build a
199 dynamically linked module called "fsl_usb2_udc" and force
200 all gadget drivers to also be dynamically linked.
203 tristate "Faraday FUSB300 USB Peripheral Controller"
204 depends on !PHYS_ADDR_T_64BIT && HAS_DMA
206 Faraday usb device controller FUSB300 driver
208 config USB_FOTG210_UDC
210 tristate "Faraday FOTG210 USB Peripheral Controller"
212 Faraday USB2.0 OTG controller which can be configured as
213 high speed or full speed USB device. This driver supppors
214 Bulk Transfer so far.
216 Say "y" to link the driver statically, or "m" to build a
217 dynamically linked module called "fotg210_udc".
220 tristate "OMAP USB Device Controller"
221 depends on ARCH_OMAP1
222 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3 || MACH_OMAP_H4_OTG
224 Many Texas Instruments OMAP processors have flexible full
225 speed USB device controllers, with support for up to 30
226 endpoints (plus endpoint zero). This driver supports the
227 controller in the OMAP 1611, and should work with controllers
228 in other OMAP processors too, given minor tweaks.
230 Say "y" to link the driver statically, or "m" to build a
231 dynamically linked module called "omap_udc" and force all
232 gadget drivers to also be dynamically linked.
235 tristate "PXA 25x or IXP 4xx"
236 depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX
238 Intel's PXA 25x series XScale ARM-5TE processors include
239 an integrated full speed USB 1.1 device controller. The
240 controller in the IXP 4xx series is register-compatible.
242 It has fifteen fixed-function endpoints, as well as endpoint
243 zero (for control transfers).
245 Say "y" to link the driver statically, or "m" to build a
246 dynamically linked module called "pxa25x_udc" and force all
247 gadget drivers to also be dynamically linked.
249 # if there's only one gadget driver, using only two bulk endpoints,
250 # don't waste memory for the other endpoints
251 config USB_PXA25X_SMALL
252 depends on USB_PXA25X
254 default n if USB_ETH_RNDIS
255 default y if USB_ZERO
257 default y if USB_G_SERIAL
260 tristate "Renesas R8A66597 USB Peripheral Controller"
263 R8A66597 is a discrete USB host and peripheral controller chip that
264 supports both full and high speed USB 2.0 data transfers.
265 It has nine configurable endpoints, and endpoint zero.
267 Say "y" to link the driver statically, or "m" to build a
268 dynamically linked module called "r8a66597_udc" and force all
269 gadget drivers to also be dynamically linked.
271 config USB_RENESAS_USBHS_UDC
272 tristate 'Renesas USBHS controller'
273 depends on USB_RENESAS_USBHS
275 Renesas USBHS is a discrete USB host and peripheral controller chip
276 that supports both full and high speed USB 2.0 data transfers.
277 It has nine or more configurable endpoints, and endpoint zero.
279 Say "y" to link the driver statically, or "m" to build a
280 dynamically linked module called "renesas_usbhs" and force all
281 gadget drivers to also be dynamically linked.
286 Intel's PXA 27x series XScale ARM v5TE processors include
287 an integrated full speed USB 1.1 device controller.
289 It has up to 23 endpoints, as well as endpoint zero (for
292 Say "y" to link the driver statically, or "m" to build a
293 dynamically linked module called "pxa27x_udc" and force all
294 gadget drivers to also be dynamically linked.
297 tristate "S3C HS/OtG USB Device controller"
298 depends on S3C_DEV_USB_HSOTG
300 The Samsung S3C64XX USB2.0 high-speed gadget controller
301 integrated into the S3C64XX series SoC.
304 tristate "S3C2410 USB Device Controller"
305 depends on ARCH_S3C24XX
307 Samsung's S3C2410 is an ARM-4 processor with an integrated
308 full speed USB 1.1 device controller. It has 4 configurable
309 endpoints, as well as endpoint zero (for control transfers).
311 This driver has been tested on the S3C2410, S3C2412, and
314 config USB_S3C2410_DEBUG
315 boolean "S3C2410 udc debug messages"
316 depends on USB_S3C2410
319 tristate "S3C2416, S3C2443 and S3C2450 USB Device Controller"
320 depends on ARCH_S3C24XX
322 Samsung's S3C2416, S3C2443 and S3C2450 is an ARM9 based SoC
323 integrated with dual speed USB 2.0 device controller. It has
324 8 endpoints, as well as endpoint zero.
326 This driver has been tested on S3C2416 and S3C2450 processors.
329 tristate "Marvell USB2.0 Device Controller"
332 Marvell Socs (including PXA and MMP series) include a high speed
333 USB2.0 OTG controller, which can be configured as high speed or
334 full speed USB peripheral.
338 tristate "MARVELL PXA2128 USB 3.0 controller"
340 MARVELL PXA2128 Processor series include a super speed USB3.0 device
341 controller, which support super speed USB peripheral.
344 # Controllers available in both integrated and discrete versions
348 tristate "Renesas M66592 USB Peripheral Controller"
350 M66592 is a discrete USB peripheral controller chip that
351 supports both full and high speed USB 2.0 data transfers.
352 It has seven configurable endpoints, and endpoint zero.
354 Say "y" to link the driver statically, or "m" to build a
355 dynamically linked module called "m66592_udc" and force all
356 gadget drivers to also be dynamically linked.
359 # Controllers available only in discrete form (and all PCI controllers)
362 config USB_AMD5536UDC
363 tristate "AMD5536 UDC"
366 The AMD5536 UDC is part of the AMD Geode CS5536, an x86 southbridge.
367 It is a USB Highspeed DMA capable USB device controller. Beside ep0
368 it provides 4 IN and 4 OUT endpoints (bulk or interrupt type).
369 The UDC port supports OTG operation, and may be used as a host port
370 if it's not being used to implement peripheral or OTG roles.
372 Say "y" to link the driver statically, or "m" to build a
373 dynamically linked module called "amd5536udc" and force all
374 gadget drivers to also be dynamically linked.
377 tristate "Freescale QE/CPM USB Device Controller"
378 depends on FSL_SOC && (QUICC_ENGINE || CPM)
380 Some of Freescale PowerPC processors have a Full Speed
381 QE/CPM2 USB controller, which support device mode with 4
382 programmable endpoints. This driver supports the
383 controller in the MPC8360 and MPC8272, and should work with
384 controllers having QE or CPM2, given minor tweaks.
386 Set CONFIG_USB_GADGET to "m" to build this driver as a
387 dynamically linked module called "fsl_qe_udc".
390 tristate "PLX NET2272"
392 PLX NET2272 is a USB peripheral controller which supports
393 both full and high speed USB 2.0 data transfers.
395 It has three configurable endpoints, as well as endpoint zero
396 (for control transfer).
397 Say "y" to link the driver statically, or "m" to build a
398 dynamically linked module called "net2272" and force all
399 gadget drivers to also be dynamically linked.
401 config USB_NET2272_DMA
402 boolean "Support external DMA controller"
403 depends on USB_NET2272 && HAS_DMA
405 The NET2272 part can optionally support an external DMA
406 controller, but your board has to have support in the
409 If unsure, say "N" here. The driver works fine in PIO mode.
412 tristate "NetChip 228x"
415 NetChip 2280 / 2282 is a PCI based USB peripheral controller which
416 supports both full and high speed USB 2.0 data transfers.
418 It has six configurable endpoints, as well as endpoint zero
419 (for control transfers) and several endpoints with dedicated
422 Say "y" to link the driver statically, or "m" to build a
423 dynamically linked module called "net2280" and force all
424 gadget drivers to also be dynamically linked.
427 tristate "Toshiba TC86C001 'Goku-S'"
430 The Toshiba TC86C001 is a PCI device which includes controllers
431 for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI).
433 The device controller has three configurable (bulk or interrupt)
434 endpoints, plus endpoint zero (for control transfers).
436 Say "y" to link the driver statically, or "m" to build a
437 dynamically linked module called "goku_udc" and to force all
438 gadget drivers to also be dynamically linked.
441 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7831) UDC"
444 This is a USB device driver for EG20T PCH.
445 EG20T PCH is the platform controller hub that is used in Intel's
446 general embedded platform. EG20T PCH has USB device interface.
447 Using this interface, it is able to access system devices connected
449 This driver enables USB device function.
450 USB device is a USB peripheral controller which
451 supports both full and high speed USB 2.0 data transfers.
452 This driver supports both control transfer and bulk transfer modes.
453 This driver dose not support interrupt transfer or isochronous
456 This driver also can be used for LAPIS Semiconductor's ML7213 which is
457 for IVI(In-Vehicle Infotainment) use.
458 ML7831 is for general purpose use.
459 ML7213/ML7831 is companion chip for Intel Atom E6xx series.
460 ML7213/ML7831 is completely compatible for Intel EG20T PCH.
463 # LAST -- dummy/emulated controller
467 tristate "Dummy HCD (DEVELOPMENT)"
468 depends on USB=y || (USB=m && USB_GADGET=m)
470 This host controller driver emulates USB, looping all data transfer
471 requests back to a USB "gadget driver" in the same host. The host
472 side is the master; the gadget side is the slave. Gadget drivers
473 can be high, full, or low speed; and they have access to endpoints
474 like those from NET2280, PXA2xx, or SA1100 hardware.
476 This may help in some stages of creating a driver to embed in a
477 Linux device, since it lets you debug several parts of the gadget
478 driver without its hardware or drivers being involved.
480 Since such a gadget side driver needs to interoperate with a host
481 side Linux-USB device driver, this may help to debug both sides
482 of a USB protocol stack.
484 Say "y" to link the driver statically, or "m" to build a
485 dynamically linked module called "dummy_hcd" and force all
486 gadget drivers to also be dynamically linked.
488 # NOTE: Please keep dummy_hcd LAST so that "real hardware" appears
489 # first and will be selected by default.
497 # composite based drivers
498 config USB_LIBCOMPOSITE
501 depends on USB_GADGET
542 config USB_F_MASS_STORAGE
546 tristate "USB Gadget Drivers"
549 A Linux "Gadget Driver" talks to the USB Peripheral Controller
550 driver through the abstract "gadget" API. Some other operating
551 systems call these "client" drivers, of which "class drivers"
552 are a subset (implementing a USB device class specification).
553 A gadget driver implements one or more USB functions using
554 the peripheral hardware.
556 Gadget drivers are hardware-neutral, or "platform independent",
557 except that they sometimes must understand quirks or limitations
558 of the particular controllers they work with. For example, when
559 a controller doesn't support alternate configurations or provide
560 enough of the right types of endpoints, the gadget driver might
561 not be able work with that controller, or might need to implement
562 a less common variant of a device class protocol.
564 # this first set of drivers all depend on bulk-capable hardware.
567 tristate "USB functions configurable through configfs"
568 select USB_LIBCOMPOSITE
570 A Linux USB "gadget" can be set up through configfs.
571 If this is the case, the USB functions (which from the host's
572 perspective are seen as interfaces) and configurations are
573 specified simply by creating appropriate directories in configfs.
574 Associating functions with configurations is done by creating
575 appropriate symbolic links.
576 For more information see Documentation/usb/gadget_configfs.txt.
578 config USB_CONFIGFS_SERIAL
579 boolean "Generic serial bulk in/out"
580 depends on USB_CONFIGFS
585 The function talks to the Linux-USB generic serial driver.
587 config USB_CONFIGFS_ACM
588 boolean "Abstract Control Model (CDC ACM)"
589 depends on USB_CONFIGFS
594 ACM serial link. This function can be used to interoperate with
595 MS-Windows hosts or with the Linux-USB "cdc-acm" driver.
597 config USB_CONFIGFS_OBEX
598 boolean "Object Exchange Model (CDC OBEX)"
599 depends on USB_CONFIGFS
604 You will need a user space OBEX server talking to /dev/ttyGS*,
605 since the kernel itself doesn't implement the OBEX protocol.
607 config USB_CONFIGFS_NCM
608 boolean "Network Control Model (CDC NCM)"
609 depends on USB_CONFIGFS
614 NCM is an advanced protocol for Ethernet encapsulation, allows
615 grouping of several ethernet frames into one USB transfer and
616 different alignment possibilities.
618 config USB_CONFIGFS_ECM
619 boolean "Ethernet Control Model (CDC ECM)"
620 depends on USB_CONFIGFS
625 The "Communication Device Class" (CDC) Ethernet Control Model.
626 That protocol is often avoided with pure Ethernet adapters, in
627 favor of simpler vendor-specific hardware, but is widely
628 supported by firmware for smart network devices.
630 config USB_CONFIGFS_ECM_SUBSET
631 boolean "Ethernet Control Model (CDC ECM) subset"
632 depends on USB_CONFIGFS
637 On hardware that can't implement the full protocol,
638 a simple CDC subset is used, placing fewer demands on USB.
640 config USB_CONFIGFS_RNDIS
642 depends on USB_CONFIGFS
648 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
649 and Microsoft provides redistributable binary RNDIS drivers for
650 older versions of Windows.
652 To make MS-Windows work with this, use Documentation/usb/linux.inf
653 as the "driver info file". For versions of MS-Windows older than
654 XP, you'll need to download drivers from Microsoft's website; a URL
655 is given in comments found in that info file.
657 config USB_CONFIGFS_EEM
658 bool "Ethernet Emulation Model (EEM)"
659 depends on USB_CONFIGFS
664 CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
665 and therefore can be supported by more hardware. Technically ECM and
666 EEM are designed for different applications. The ECM model extends
667 the network interface to the target (e.g. a USB cable modem), and the
668 EEM model is for mobile devices to communicate with hosts using
669 ethernet over USB. For Linux gadgets, however, the interface with
670 the host is the same (a usbX device), so the differences are minimal.
672 config USB_CONFIGFS_PHONET
673 boolean "Phonet protocol"
674 depends on USB_CONFIGFS
680 The Phonet protocol implementation for USB device.
682 config USB_CONFIGFS_MASS_STORAGE
683 boolean "Mass storage"
684 depends on USB_CONFIGFS
685 select USB_F_MASS_STORAGE
687 The Mass Storage Gadget acts as a USB Mass Storage disk drive.
688 As its storage repository it can use a regular file or a block
689 device (in much the same way as the "loop" device driver),
690 specified as a module parameter or sysfs option.
692 config USB_CONFIGFS_F_LB_SS
693 boolean "Loopback and sourcesink function (for testing)"
694 depends on USB_CONFIGFS
697 Loopback function loops back a configurable number of transfers.
698 Sourcesink function either sinks and sources bulk data.
699 It also implements control requests, for "chapter 9" conformance.
700 Make this be the first driver you try using on top of any new
701 USB peripheral controller driver. Then you can use host-side
702 test software, like the "usbtest" driver, to put your hardware
703 and its driver through a basic set of functional tests.
706 tristate "Gadget Zero (DEVELOPMENT)"
707 select USB_LIBCOMPOSITE
710 Gadget Zero is a two-configuration device. It either sinks and
711 sources bulk data; or it loops back a configurable number of
712 transfers. It also implements control requests, for "chapter 9"
713 conformance. The driver needs only two bulk-capable endpoints, so
714 it can work on top of most device-side usb controllers. It's
715 useful for testing, and is also a working example showing how
716 USB "gadget drivers" can be written.
718 Make this be the first driver you try using on top of any new
719 USB peripheral controller driver. Then you can use host-side
720 test software, like the "usbtest" driver, to put your hardware
721 and its driver through a basic set of functional tests.
723 Gadget Zero also works with the host-side "usb-skeleton" driver,
724 and with many kinds of host-side test software. You may need
725 to tweak product and vendor IDs before host software knows about
726 this device, and arrange to select an appropriate configuration.
728 Say "y" to link the driver statically, or "m" to build a
729 dynamically linked module called "g_zero".
731 config USB_ZERO_HNPTEST
732 boolean "HNP Test Device"
733 depends on USB_ZERO && USB_OTG
735 You can configure this device to enumerate using the device
736 identifiers of the USB-OTG test device. That means that when
737 this gadget connects to another OTG device, with this one using
738 the "B-Peripheral" role, that device will use HNP to let this
739 one serve as the USB host instead (in the "B-Host" role).
742 tristate "Audio Gadget"
744 select USB_LIBCOMPOSITE
747 This Gadget Audio driver is compatible with USB Audio Class
748 specification 2.0. It implements 1 AudioControl interface,
749 1 AudioStreaming Interface each for USB-OUT and USB-IN.
750 Number of channels, sample rate and sample size can be
751 specified as module parameters.
752 This driver doesn't expect any real Audio codec to be present
753 on the device - the audio streams are simply sinked to and
754 sourced from a virtual ALSA sound card created. The user-space
755 application may choose to do whatever it wants with the data
756 received from the USB Host and choose to provide whatever it
757 wants as audio data to the USB Host.
759 Say "y" to link the driver statically, or "m" to build a
760 dynamically linked module called "g_audio".
763 bool "UAC 1.0 (Legacy)"
766 If you instead want older UAC Spec-1.0 driver that also has audio
767 paths hardwired to the Audio codec chip on-board and doesn't work
771 tristate "Ethernet Gadget (with CDC Ethernet support)"
773 select USB_LIBCOMPOSITE
780 This driver implements Ethernet style communication, in one of
783 - The "Communication Device Class" (CDC) Ethernet Control Model.
784 That protocol is often avoided with pure Ethernet adapters, in
785 favor of simpler vendor-specific hardware, but is widely
786 supported by firmware for smart network devices.
788 - On hardware can't implement that protocol, a simple CDC subset
789 is used, placing fewer demands on USB.
791 - CDC Ethernet Emulation Model (EEM) is a newer standard that has
792 a simpler interface that can be used by more USB hardware.
794 RNDIS support is an additional option, more demanding than than
797 Within the USB device, this gadget driver exposes a network device
798 "usbX", where X depends on what other networking devices you have.
799 Treat it like a two-node Ethernet link: host, and gadget.
801 The Linux-USB host-side "usbnet" driver interoperates with this
802 driver, so that deep I/O queues can be supported. On 2.4 kernels,
803 use "CDCEther" instead, if you're using the CDC option. That CDC
804 mode should also interoperate with standard CDC Ethernet class
805 drivers on other host operating systems.
807 Say "y" to link the driver statically, or "m" to build a
808 dynamically linked module called "g_ether".
813 select USB_LIBCOMPOSITE
817 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
818 and Microsoft provides redistributable binary RNDIS drivers for
819 older versions of Windows.
821 If you say "y" here, the Ethernet gadget driver will try to provide
822 a second device configuration, supporting RNDIS to talk to such
825 To make MS-Windows work with this, use Documentation/usb/linux.inf
826 as the "driver info file". For versions of MS-Windows older than
827 XP, you'll need to download drivers from Microsoft's website; a URL
828 is given in comments found in that info file.
831 bool "Ethernet Emulation Model (EEM) support"
833 select USB_LIBCOMPOSITE
837 CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
838 and therefore can be supported by more hardware. Technically ECM and
839 EEM are designed for different applications. The ECM model extends
840 the network interface to the target (e.g. a USB cable modem), and the
841 EEM model is for mobile devices to communicate with hosts using
842 ethernet over USB. For Linux gadgets, however, the interface with
843 the host is the same (a usbX device), so the differences are minimal.
845 If you say "y" here, the Ethernet gadget driver will use the EEM
846 protocol rather than ECM. If unsure, say "n".
849 tristate "Network Control Model (NCM) support"
851 select USB_LIBCOMPOSITE
856 This driver implements USB CDC NCM subclass standard. NCM is
857 an advanced protocol for Ethernet encapsulation, allows grouping
858 of several ethernet frames into one USB transfer and different
859 alignment possibilities.
861 Say "y" to link the driver statically, or "m" to build a
862 dynamically linked module called "g_ncm".
865 tristate "Gadget Filesystem"
867 This driver provides a filesystem based API that lets user mode
868 programs implement a single-configuration USB device, including
869 endpoint I/O and control requests that don't relate to enumeration.
870 All endpoints, transfer speeds, and transfer types supported by
871 the hardware are available, through read() and write() calls.
873 Say "y" to link the driver statically, or "m" to build a
874 dynamically linked module called "gadgetfs".
876 config USB_FUNCTIONFS
877 tristate "Function Filesystem"
878 select USB_LIBCOMPOSITE
879 select USB_FUNCTIONFS_GENERIC if !(USB_FUNCTIONFS_ETH || USB_FUNCTIONFS_RNDIS)
881 The Function Filesystem (FunctionFS) lets one create USB
882 composite functions in user space in the same way GadgetFS
883 lets one create USB gadgets in user space. This allows creation
884 of composite gadgets such that some of the functions are
885 implemented in kernel space (for instance Ethernet, serial or
886 mass storage) and other are implemented in user space.
888 If you say "y" or "m" here you will be able what kind of
889 configurations the gadget will provide.
891 Say "y" to link the driver statically, or "m" to build
892 a dynamically linked module called "g_ffs".
894 config USB_FUNCTIONFS_ETH
895 bool "Include configuration with CDC ECM (Ethernet)"
896 depends on USB_FUNCTIONFS && NET
901 Include a configuration with CDC ECM function (Ethernet) and the
904 config USB_FUNCTIONFS_RNDIS
905 bool "Include configuration with RNDIS (Ethernet)"
906 depends on USB_FUNCTIONFS && NET
911 Include a configuration with RNDIS function (Ethernet) and the Filesystem.
913 config USB_FUNCTIONFS_GENERIC
914 bool "Include 'pure' configuration"
915 depends on USB_FUNCTIONFS
917 Include a configuration with the Function Filesystem alone with
918 no Ethernet interface.
920 config USB_MASS_STORAGE
921 tristate "Mass Storage Gadget"
923 select USB_LIBCOMPOSITE
924 select USB_F_MASS_STORAGE
926 The Mass Storage Gadget acts as a USB Mass Storage disk drive.
927 As its storage repository it can use a regular file or a block
928 device (in much the same way as the "loop" device driver),
929 specified as a module parameter or sysfs option.
931 This driver is a replacement for now removed File-backed
932 Storage Gadget (g_file_storage).
934 Say "y" to link the driver statically, or "m" to build
935 a dynamically linked module called "g_mass_storage".
937 config USB_GADGET_TARGET
938 tristate "USB Gadget Target Fabric Module"
939 depends on TARGET_CORE
940 select USB_LIBCOMPOSITE
942 This fabric is an USB gadget. Two USB protocols are supported that is
943 BBB or BOT (Bulk Only Transport) and UAS (USB Attached SCSI). BOT is
944 advertised on alternative interface 0 (primary) and UAS is on
945 alternative interface 1. Both protocols can work on USB2.0 and USB3.0.
946 UAS utilizes the USB 3.0 feature called streams support.
949 tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
955 select USB_LIBCOMPOSITE
957 The Serial Gadget talks to the Linux-USB generic serial driver.
958 This driver supports a CDC-ACM module option, which can be used
959 to interoperate with MS-Windows hosts or with the Linux-USB
962 This driver also supports a CDC-OBEX option. You will need a
963 user space OBEX server talking to /dev/ttyGS*, since the kernel
964 itself doesn't implement the OBEX protocol.
966 Say "y" to link the driver statically, or "m" to build a
967 dynamically linked module called "g_serial".
969 For more information, see Documentation/usb/gadget_serial.txt
970 which includes instructions and a "driver info file" needed to
971 make MS-Windows work with CDC ACM.
973 config USB_MIDI_GADGET
974 tristate "MIDI Gadget"
976 select USB_LIBCOMPOSITE
979 The MIDI Gadget acts as a USB Audio device, with one MIDI
980 input and one MIDI output. These MIDI jacks appear as
981 a sound "card" in the ALSA sound system. Other MIDI
982 connections can then be made on the gadget system, using
983 ALSA's aconnect utility etc.
985 Say "y" to link the driver statically, or "m" to build a
986 dynamically linked module called "g_midi".
989 tristate "Printer Gadget"
990 select USB_LIBCOMPOSITE
992 The Printer Gadget channels data between the USB host and a
993 userspace program driving the print engine. The user space
994 program reads and writes the device file /dev/g_printer to
995 receive or send printer data. It can use ioctl calls to
996 the device file to get or set printer status.
998 Say "y" to link the driver statically, or "m" to build a
999 dynamically linked module called "g_printer".
1001 For more information, see Documentation/usb/gadget_printer.txt
1002 which includes sample code for accessing the device file.
1006 config USB_CDC_COMPOSITE
1007 tristate "CDC Composite Device (Ethernet and ACM)"
1009 select USB_LIBCOMPOSITE
1015 This driver provides two functions in one configuration:
1016 a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link.
1018 This driver requires four bulk and two interrupt endpoints,
1019 plus the ability to handle altsettings. Not all peripheral
1020 controllers are that capable.
1022 Say "y" to link the driver statically, or "m" to build a
1023 dynamically linked module.
1026 tristate "Nokia composite gadget"
1028 select USB_LIBCOMPOSITE
1036 The Nokia composite gadget provides support for acm, obex
1037 and phonet in only one composite gadget driver.
1039 It's only really useful for N900 hardware. If you're building
1040 a kernel for N900, say Y or M here. If unsure, say N.
1043 tristate "CDC Composite Device (ACM and mass storage)"
1045 select USB_LIBCOMPOSITE
1048 select USB_F_MASS_STORAGE
1050 This driver provides two functions in one configuration:
1051 a mass storage, and a CDC ACM (serial port) link.
1053 Say "y" to link the driver statically, or "m" to build a
1054 dynamically linked module called "g_acm_ms".
1057 tristate "Multifunction Composite Gadget"
1058 depends on BLOCK && NET
1059 select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS
1060 select USB_LIBCOMPOSITE
1064 select USB_F_MASS_STORAGE
1066 The Multifunction Composite Gadget provides Ethernet (RNDIS
1067 and/or CDC Ethernet), mass storage and ACM serial link
1070 You will be asked to choose which of the two configurations is
1071 to be available in the gadget. At least one configuration must
1072 be chosen to make the gadget usable. Selecting more than one
1073 configuration will prevent Windows from automatically detecting
1074 the gadget as a composite gadget, so an INF file will be needed to
1077 Say "y" to link the driver statically, or "m" to build a
1078 dynamically linked module called "g_multi".
1080 config USB_G_MULTI_RNDIS
1081 bool "RNDIS + CDC Serial + Storage configuration"
1082 depends on USB_G_MULTI
1087 This option enables a configuration with RNDIS, CDC Serial and
1088 Mass Storage functions available in the Multifunction Composite
1089 Gadget. This is the configuration dedicated for Windows since RNDIS
1090 is Microsoft's protocol.
1094 config USB_G_MULTI_CDC
1095 bool "CDC Ethernet + CDC Serial + Storage configuration"
1096 depends on USB_G_MULTI
1100 This option enables a configuration with CDC Ethernet (ECM), CDC
1101 Serial and Mass Storage functions available in the Multifunction
1109 tristate "HID Gadget"
1110 select USB_LIBCOMPOSITE
1112 The HID gadget driver provides generic emulation of USB
1113 Human Interface Devices (HID).
1115 For more information, see Documentation/usb/gadget_hid.txt which
1116 includes sample code for accessing the device files.
1118 Say "y" to link the driver statically, or "m" to build a
1119 dynamically linked module called "g_hid".
1121 # Standalone / single function gadgets
1123 tristate "EHCI Debug Device Gadget"
1125 select USB_LIBCOMPOSITE
1127 This gadget emulates an EHCI Debug device. This is useful when you want
1128 to interact with an EHCI Debug Port.
1130 Say "y" to link the driver statically, or "m" to build a
1131 dynamically linked module called "g_dbgp".
1135 prompt "EHCI Debug Device mode"
1136 default USB_G_DBGP_SERIAL
1138 config USB_G_DBGP_PRINTK
1139 depends on USB_G_DBGP
1142 Directly printk() received data. No interaction.
1144 config USB_G_DBGP_SERIAL
1145 depends on USB_G_DBGP
1149 Userland can interact using /dev/ttyGSxxx.
1153 # put drivers that need isochronous transfer support (for audio
1154 # or video class gadget drivers), or specific hardware, here.
1156 tristate "USB Webcam Gadget"
1157 depends on VIDEO_DEV
1158 select USB_LIBCOMPOSITE
1159 select VIDEOBUF2_VMALLOC
1161 The Webcam Gadget acts as a composite USB Audio and Video Class
1162 device. It provides a userspace API to process UVC control requests
1163 and stream video data to the host.
1165 Say "y" to link the driver statically, or "m" to build a
1166 dynamically linked module called "g_webcam".