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"
19 USB is a master/slave protocol, organized with one master
20 host (such as a PC) controlling up to 127 peripheral devices.
21 The USB hardware is asymmetric, which makes it easier to set up:
22 you can't connect a "to-the-host" connector to a peripheral.
24 Linux can run in the host, or in the peripheral. In both cases
25 you need a low level bus controller driver, and some software
26 talking to it. Peripheral controllers are often discrete silicon,
27 or are integrated with the CPU in a microcontroller. The more
28 familiar host side controllers have names like "EHCI", "OHCI",
29 or "UHCI", and are usually integrated into southbridges on PC
32 Enable this configuration option if you want to run Linux inside
33 a USB peripheral device. Configure one hardware driver for your
34 peripheral/device side bus controller, and a "gadget driver" for
35 your peripheral protocol. (If you use modular gadget drivers,
36 you may configure more than one.)
38 If in doubt, say "N" and don't enable these drivers; most people
39 don't have this kind of hardware (except maybe inside Linux PDAs).
41 For more information, see <http://www.linux-usb.org/gadget> and
42 the kernel DocBook documentation for this API.
46 config USB_GADGET_DEBUG
47 boolean "Debugging messages (DEVELOPMENT)"
48 depends on DEBUG_KERNEL
50 Many controller and gadget drivers will print some debugging
51 messages if you use this option to ask for those messages.
53 Avoid enabling these messages, even if you're actively
54 debugging such a driver. Many drivers will emit so many
55 messages that the driver timings are affected, which will
56 either create new failure modes or remove the one you're
57 trying to track down. Never enable these messages for a
60 config USB_GADGET_DEBUG_FILES
61 boolean "Debugging information files (DEVELOPMENT)"
64 Some of the drivers in the "gadget" framework can expose
65 debugging information in files such as /proc/driver/udc
66 (for a peripheral controller). The information in these
67 files may help when you're troubleshooting or bringing up a
68 driver on a new board. Enable these files by choosing "Y"
69 here. If in doubt, or to conserve kernel memory, say "N".
71 config USB_GADGET_DEBUG_FS
72 boolean "Debugging information files in debugfs (DEVELOPMENT)"
75 Some of the drivers in the "gadget" framework can expose
76 debugging information in files under /sys/kernel/debug/.
77 The information in these files may help when you're
78 troubleshooting or bringing up a driver on a new board.
79 Enable these files by choosing "Y" here. If in doubt, or
80 to conserve kernel memory, say "N".
82 config USB_GADGET_VBUS_DRAW
83 int "Maximum VBUS Power usage (2-500 mA)"
87 Some devices need to draw power from USB when they are
88 configured, perhaps to operate circuitry or to recharge
89 batteries. This is in addition to any local power supply,
90 such as an AC adapter or batteries.
92 Enter the maximum power your device draws through USB, in
93 milliAmperes. The permitted range of values is 2 - 500 mA;
94 0 mA would be legal, but can make some hosts misbehave.
96 This value will be used except for system-specific gadget
97 drivers that have more specific information.
99 config USB_GADGET_SELECTED
103 # USB Peripheral Controller Support
105 # The order here is alphabetical, except that integrated controllers go
106 # before discrete ones so they will be the initial/default value:
107 # - integrated/SOC controllers first
108 # - licensed IP used in both SOC and discrete versions
109 # - discrete ones (including all PCI-only controllers)
110 # - debug/dummy gadget+hcd is last.
113 prompt "USB Peripheral Controller"
114 depends on USB_GADGET
116 A USB device uses a controller to talk to its host.
117 Systems should have only one such upstream link.
118 Many controller drivers are platform-specific; these
119 often need board-specific hooks.
122 # Integrated controllers
125 config USB_GADGET_AT91
126 boolean "Atmel AT91 USB Device Port"
127 depends on ARCH_AT91 && !ARCH_AT91SAM9RL && !ARCH_AT91CAP9 && !ARCH_AT91SAM9G45
128 select USB_GADGET_SELECTED
130 Many Atmel AT91 processors (such as the AT91RM2000) have a
131 full speed USB Device Port with support for five configurable
132 endpoints (plus endpoint zero).
134 Say "y" to link the driver statically, or "m" to build a
135 dynamically linked module called "at91_udc" and force all
136 gadget drivers to also be dynamically linked.
140 depends on USB_GADGET_AT91
143 config USB_GADGET_ATMEL_USBA
145 select USB_GADGET_DUALSPEED
146 depends on AVR32 || ARCH_AT91CAP9 || ARCH_AT91SAM9RL || ARCH_AT91SAM9G45
148 USBA is the integrated high-speed USB Device controller on
149 the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel.
151 config USB_ATMEL_USBA
153 depends on USB_GADGET_ATMEL_USBA
155 select USB_GADGET_SELECTED
157 config USB_GADGET_FSL_USB2
158 boolean "Freescale Highspeed USB DR Peripheral Controller"
159 depends on FSL_SOC || ARCH_MXC
160 select USB_GADGET_DUALSPEED
161 select USB_FSL_MPH_DR_OF
163 Some of Freescale PowerPC processors have a High Speed
164 Dual-Role(DR) USB controller, which supports device mode.
166 The number of programmable endpoints is different through
169 Say "y" to link the driver statically, or "m" to build a
170 dynamically linked module called "fsl_usb2_udc" and force
171 all gadget drivers to also be dynamically linked.
175 depends on USB_GADGET_FSL_USB2
177 select USB_GADGET_SELECTED
179 config USB_GADGET_LH7A40X
181 depends on ARCH_LH7A40X
183 This driver provides USB Device Controller driver for LH7A40x
187 depends on USB_GADGET_LH7A40X
189 select USB_GADGET_SELECTED
191 config USB_GADGET_OMAP
192 boolean "OMAP USB Device Controller"
194 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3 || MACH_OMAP_H4_OTG
195 select USB_OTG_UTILS if ARCH_OMAP
197 Many Texas Instruments OMAP processors have flexible full
198 speed USB device controllers, with support for up to 30
199 endpoints (plus endpoint zero). This driver supports the
200 controller in the OMAP 1611, and should work with controllers
201 in other OMAP processors too, given minor tweaks.
203 Say "y" to link the driver statically, or "m" to build a
204 dynamically linked module called "omap_udc" and force all
205 gadget drivers to also be dynamically linked.
209 depends on USB_GADGET_OMAP
211 select USB_GADGET_SELECTED
213 config USB_GADGET_PXA25X
214 boolean "PXA 25x or IXP 4xx"
215 depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX
218 Intel's PXA 25x series XScale ARM-5TE processors include
219 an integrated full speed USB 1.1 device controller. The
220 controller in the IXP 4xx series is register-compatible.
222 It has fifteen fixed-function endpoints, as well as endpoint
223 zero (for control transfers).
225 Say "y" to link the driver statically, or "m" to build a
226 dynamically linked module called "pxa25x_udc" and force all
227 gadget drivers to also be dynamically linked.
231 depends on USB_GADGET_PXA25X
233 select USB_GADGET_SELECTED
235 # if there's only one gadget driver, using only two bulk endpoints,
236 # don't waste memory for the other endpoints
237 config USB_PXA25X_SMALL
238 depends on USB_GADGET_PXA25X
240 default n if USB_ETH_RNDIS
241 default y if USB_ZERO
243 default y if USB_G_SERIAL
245 config USB_GADGET_R8A66597
246 boolean "Renesas R8A66597 USB Peripheral Controller"
247 select USB_GADGET_DUALSPEED
249 R8A66597 is a discrete USB host and peripheral controller chip that
250 supports both full and high speed USB 2.0 data transfers.
251 It has nine configurable endpoints, and endpoint zero.
253 Say "y" to link the driver statically, or "m" to build a
254 dynamically linked module called "r8a66597_udc" and force all
255 gadget drivers to also be dynamically linked.
259 depends on USB_GADGET_R8A66597
261 select USB_GADGET_SELECTED
263 config USB_GADGET_PXA27X
265 depends on ARCH_PXA && (PXA27x || PXA3xx)
268 Intel's PXA 27x series XScale ARM v5TE processors include
269 an integrated full speed USB 1.1 device controller.
271 It has up to 23 endpoints, as well as endpoint zero (for
274 Say "y" to link the driver statically, or "m" to build a
275 dynamically linked module called "pxa27x_udc" and force all
276 gadget drivers to also be dynamically linked.
280 depends on USB_GADGET_PXA27X
282 select USB_GADGET_SELECTED
284 config USB_GADGET_S3C_HSOTG
285 boolean "S3C HS/OtG USB Device controller"
286 depends on S3C_DEV_USB_HSOTG
287 select USB_GADGET_S3C_HSOTG_PIO
288 select USB_GADGET_DUALSPEED
290 The Samsung S3C64XX USB2.0 high-speed gadget controller
291 integrated into the S3C64XX series SoC.
295 depends on USB_GADGET_S3C_HSOTG
297 select USB_GADGET_SELECTED
299 config USB_GADGET_IMX
300 boolean "Freescale IMX USB Peripheral Controller"
303 Freescale's IMX series include an integrated full speed
304 USB 1.1 device controller. The controller in the IMX series
305 is register-compatible.
307 It has Six fixed-function endpoints, as well as endpoint
308 zero (for control transfers).
310 Say "y" to link the driver statically, or "m" to build a
311 dynamically linked module called "imx_udc" and force all
312 gadget drivers to also be dynamically linked.
316 depends on USB_GADGET_IMX
318 select USB_GADGET_SELECTED
320 config USB_GADGET_S3C2410
321 boolean "S3C2410 USB Device Controller"
322 depends on ARCH_S3C2410
324 Samsung's S3C2410 is an ARM-4 processor with an integrated
325 full speed USB 1.1 device controller. It has 4 configurable
326 endpoints, as well as endpoint zero (for control transfers).
328 This driver has been tested on the S3C2410, S3C2412, and
333 depends on USB_GADGET_S3C2410
335 select USB_GADGET_SELECTED
337 config USB_S3C2410_DEBUG
338 boolean "S3C2410 udc debug messages"
339 depends on USB_GADGET_S3C2410
342 # Controllers available in both integrated and discrete versions
345 # musb builds in ../musb along with host support
346 config USB_GADGET_MUSB_HDRC
347 boolean "Inventra HDRC USB Peripheral (TI, ADI, ...)"
348 depends on USB_MUSB_HDRC && (USB_MUSB_PERIPHERAL || USB_MUSB_OTG)
349 select USB_GADGET_DUALSPEED
350 select USB_GADGET_SELECTED
352 This OTG-capable silicon IP is used in dual designs including
353 the TI DaVinci, OMAP 243x, OMAP 343x, TUSB 6010, and ADI Blackfin
355 config USB_GADGET_M66592
356 boolean "Renesas M66592 USB Peripheral Controller"
357 select USB_GADGET_DUALSPEED
359 M66592 is a discrete USB peripheral controller chip that
360 supports both full and high speed USB 2.0 data transfers.
361 It has seven configurable endpoints, and endpoint zero.
363 Say "y" to link the driver statically, or "m" to build a
364 dynamically linked module called "m66592_udc" and force all
365 gadget drivers to also be dynamically linked.
369 depends on USB_GADGET_M66592
371 select USB_GADGET_SELECTED
374 # Controllers available only in discrete form (and all PCI controllers)
377 config USB_GADGET_AMD5536UDC
378 boolean "AMD5536 UDC"
380 select USB_GADGET_DUALSPEED
382 The AMD5536 UDC is part of the AMD Geode CS5536, an x86 southbridge.
383 It is a USB Highspeed DMA capable USB device controller. Beside ep0
384 it provides 4 IN and 4 OUT endpoints (bulk or interrupt type).
385 The UDC port supports OTG operation, and may be used as a host port
386 if it's not being used to implement peripheral or OTG roles.
388 Say "y" to link the driver statically, or "m" to build a
389 dynamically linked module called "amd5536udc" and force all
390 gadget drivers to also be dynamically linked.
392 config USB_AMD5536UDC
394 depends on USB_GADGET_AMD5536UDC
396 select USB_GADGET_SELECTED
398 config USB_GADGET_FSL_QE
399 boolean "Freescale QE/CPM USB Device Controller"
400 depends on FSL_SOC && (QUICC_ENGINE || CPM)
402 Some of Freescale PowerPC processors have a Full Speed
403 QE/CPM2 USB controller, which support device mode with 4
404 programmable endpoints. This driver supports the
405 controller in the MPC8360 and MPC8272, and should work with
406 controllers having QE or CPM2, given minor tweaks.
408 Set CONFIG_USB_GADGET to "m" to build this driver as a
409 dynamically linked module called "fsl_qe_udc".
413 depends on USB_GADGET_FSL_QE
415 select USB_GADGET_SELECTED
417 config USB_GADGET_CI13XXX
418 boolean "MIPS USB CI13xxx"
420 select USB_GADGET_DUALSPEED
422 MIPS USB IP core family device controller
423 Currently it only supports IP part number CI13412
425 Say "y" to link the driver statically, or "m" to build a
426 dynamically linked module called "ci13xxx_udc" and force all
427 gadget drivers to also be dynamically linked.
431 depends on USB_GADGET_CI13XXX
433 select USB_GADGET_SELECTED
435 config USB_GADGET_NET2280
436 boolean "NetChip 228x"
438 select USB_GADGET_DUALSPEED
440 NetChip 2280 / 2282 is a PCI based USB peripheral controller which
441 supports both full and high speed USB 2.0 data transfers.
443 It has six configurable endpoints, as well as endpoint zero
444 (for control transfers) and several endpoints with dedicated
447 Say "y" to link the driver statically, or "m" to build a
448 dynamically linked module called "net2280" and force all
449 gadget drivers to also be dynamically linked.
453 depends on USB_GADGET_NET2280
455 select USB_GADGET_SELECTED
457 config USB_GADGET_GOKU
458 boolean "Toshiba TC86C001 'Goku-S'"
461 The Toshiba TC86C001 is a PCI device which includes controllers
462 for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI).
464 The device controller has three configurable (bulk or interrupt)
465 endpoints, plus endpoint zero (for control transfers).
467 Say "y" to link the driver statically, or "m" to build a
468 dynamically linked module called "goku_udc" and to force all
469 gadget drivers to also be dynamically linked.
473 depends on USB_GADGET_GOKU
475 select USB_GADGET_SELECTED
477 config USB_GADGET_LANGWELL
478 boolean "Intel Langwell USB Device Controller"
480 select USB_GADGET_DUALSPEED
482 Intel Langwell USB Device Controller is a High-Speed USB
483 On-The-Go device controller.
485 The number of programmable endpoints is different through
488 Say "y" to link the driver statically, or "m" to build a
489 dynamically linked module called "langwell_udc" and force all
490 gadget drivers to also be dynamically linked.
494 depends on USB_GADGET_LANGWELL
496 select USB_GADGET_SELECTED
500 # LAST -- dummy/emulated controller
503 config USB_GADGET_DUMMY_HCD
504 boolean "Dummy HCD (DEVELOPMENT)"
505 depends on USB=y || (USB=m && USB_GADGET=m)
506 select USB_GADGET_DUALSPEED
508 This host controller driver emulates USB, looping all data transfer
509 requests back to a USB "gadget driver" in the same host. The host
510 side is the master; the gadget side is the slave. Gadget drivers
511 can be high, full, or low speed; and they have access to endpoints
512 like those from NET2280, PXA2xx, or SA1100 hardware.
514 This may help in some stages of creating a driver to embed in a
515 Linux device, since it lets you debug several parts of the gadget
516 driver without its hardware or drivers being involved.
518 Since such a gadget side driver needs to interoperate with a host
519 side Linux-USB device driver, this may help to debug both sides
520 of a USB protocol stack.
522 Say "y" to link the driver statically, or "m" to build a
523 dynamically linked module called "dummy_hcd" and force all
524 gadget drivers to also be dynamically linked.
528 depends on USB_GADGET_DUMMY_HCD
530 select USB_GADGET_SELECTED
532 # NOTE: Please keep dummy_hcd LAST so that "real hardware" appears
533 # first and will be selected by default.
537 config USB_GADGET_DUALSPEED
539 depends on USB_GADGET
542 Means that gadget drivers should include extra descriptors
543 and code to handle dual-speed controllers.
549 tristate "USB Gadget Drivers"
550 depends on USB_GADGET && USB_GADGET_SELECTED
553 A Linux "Gadget Driver" talks to the USB Peripheral Controller
554 driver through the abstract "gadget" API. Some other operating
555 systems call these "client" drivers, of which "class drivers"
556 are a subset (implementing a USB device class specification).
557 A gadget driver implements one or more USB functions using
558 the peripheral hardware.
560 Gadget drivers are hardware-neutral, or "platform independent",
561 except that they sometimes must understand quirks or limitations
562 of the particular controllers they work with. For example, when
563 a controller doesn't support alternate configurations or provide
564 enough of the right types of endpoints, the gadget driver might
565 not be able work with that controller, or might need to implement
566 a less common variant of a device class protocol.
568 # this first set of drivers all depend on bulk-capable hardware.
571 tristate "Gadget Zero (DEVELOPMENT)"
573 Gadget Zero is a two-configuration device. It either sinks and
574 sources bulk data; or it loops back a configurable number of
575 transfers. It also implements control requests, for "chapter 9"
576 conformance. The driver needs only two bulk-capable endpoints, so
577 it can work on top of most device-side usb controllers. It's
578 useful for testing, and is also a working example showing how
579 USB "gadget drivers" can be written.
581 Make this be the first driver you try using on top of any new
582 USB peripheral controller driver. Then you can use host-side
583 test software, like the "usbtest" driver, to put your hardware
584 and its driver through a basic set of functional tests.
586 Gadget Zero also works with the host-side "usb-skeleton" driver,
587 and with many kinds of host-side test software. You may need
588 to tweak product and vendor IDs before host software knows about
589 this device, and arrange to select an appropriate configuration.
591 Say "y" to link the driver statically, or "m" to build a
592 dynamically linked module called "g_zero".
594 config USB_ZERO_HNPTEST
595 boolean "HNP Test Device"
596 depends on USB_ZERO && USB_OTG
598 You can configure this device to enumerate using the device
599 identifiers of the USB-OTG test device. That means that when
600 this gadget connects to another OTG device, with this one using
601 the "B-Peripheral" role, that device will use HNP to let this
602 one serve as the USB host instead (in the "B-Host" role).
605 tristate "Audio Gadget (EXPERIMENTAL)"
609 Gadget Audio is compatible with USB Audio Class specification 1.0.
610 It will include at least one AudioControl interface, zero or more
611 AudioStream interface and zero or more MIDIStream interface.
613 Gadget Audio will use on-board ALSA (CONFIG_SND) audio card to
614 playback or capture audio stream.
616 Say "y" to link the driver statically, or "m" to build a
617 dynamically linked module called "g_audio".
620 tristate "Ethernet Gadget (with CDC Ethernet support)"
624 This driver implements Ethernet style communication, in one of
627 - The "Communication Device Class" (CDC) Ethernet Control Model.
628 That protocol is often avoided with pure Ethernet adapters, in
629 favor of simpler vendor-specific hardware, but is widely
630 supported by firmware for smart network devices.
632 - On hardware can't implement that protocol, a simple CDC subset
633 is used, placing fewer demands on USB.
635 - CDC Ethernet Emulation Model (EEM) is a newer standard that has
636 a simpler interface that can be used by more USB hardware.
638 RNDIS support is an additional option, more demanding than than
641 Within the USB device, this gadget driver exposes a network device
642 "usbX", where X depends on what other networking devices you have.
643 Treat it like a two-node Ethernet link: host, and gadget.
645 The Linux-USB host-side "usbnet" driver interoperates with this
646 driver, so that deep I/O queues can be supported. On 2.4 kernels,
647 use "CDCEther" instead, if you're using the CDC option. That CDC
648 mode should also interoperate with standard CDC Ethernet class
649 drivers on other host operating systems.
651 Say "y" to link the driver statically, or "m" to build a
652 dynamically linked module called "g_ether".
659 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
660 and Microsoft provides redistributable binary RNDIS drivers for
661 older versions of Windows.
663 If you say "y" here, the Ethernet gadget driver will try to provide
664 a second device configuration, supporting RNDIS to talk to such
667 To make MS-Windows work with this, use Documentation/usb/linux.inf
668 as the "driver info file". For versions of MS-Windows older than
669 XP, you'll need to download drivers from Microsoft's website; a URL
670 is given in comments found in that info file.
673 bool "Ethernet Emulation Model (EEM) support"
677 CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
678 and therefore can be supported by more hardware. Technically ECM and
679 EEM are designed for different applications. The ECM model extends
680 the network interface to the target (e.g. a USB cable modem), and the
681 EEM model is for mobile devices to communicate with hosts using
682 ethernet over USB. For Linux gadgets, however, the interface with
683 the host is the same (a usbX device), so the differences are minimal.
685 If you say "y" here, the Ethernet gadget driver will use the EEM
686 protocol rather than ECM. If unsure, say "n".
689 tristate "Gadget Filesystem (EXPERIMENTAL)"
690 depends on EXPERIMENTAL
692 This driver provides a filesystem based API that lets user mode
693 programs implement a single-configuration USB device, including
694 endpoint I/O and control requests that don't relate to enumeration.
695 All endpoints, transfer speeds, and transfer types supported by
696 the hardware are available, through read() and write() calls.
698 Currently, this option is still labelled as EXPERIMENTAL because
699 of existing race conditions in the underlying in-kernel AIO core.
701 Say "y" to link the driver statically, or "m" to build a
702 dynamically linked module called "gadgetfs".
704 config USB_FUNCTIONFS
705 tristate "Function Filesystem (EXPERIMENTAL)"
706 depends on EXPERIMENTAL
707 select USB_FUNCTIONFS_GENERIC if !(USB_FUNCTIONFS_ETH || USB_FUNCTIONFS_RNDIS)
709 The Function Filesystem (FunctionFS) lets one create USB
710 composite functions in user space in the same way GadgetFS
711 lets one create USB gadgets in user space. This allows creation
712 of composite gadgets such that some of the functions are
713 implemented in kernel space (for instance Ethernet, serial or
714 mass storage) and other are implemented in user space.
716 If you say "y" or "m" here you will be able what kind of
717 configurations the gadget will provide.
719 Say "y" to link the driver statically, or "m" to build
720 a dynamically linked module called "g_ffs".
722 config USB_FUNCTIONFS_ETH
723 bool "Include configuration with CDC ECM (Ethernet)"
724 depends on USB_FUNCTIONFS && NET
726 Include a configuration with CDC ECM function (Ethernet) and the
729 config USB_FUNCTIONFS_RNDIS
730 bool "Include configuration with RNDIS (Ethernet)"
731 depends on USB_FUNCTIONFS && NET
733 Include a configuration with RNDIS function (Ethernet) and the Filesystem.
735 config USB_FUNCTIONFS_GENERIC
736 bool "Include 'pure' configuration"
737 depends on USB_FUNCTIONFS
739 Include a configuration with the Function Filesystem alone with
740 no Ethernet interface.
742 config USB_FILE_STORAGE
743 tristate "File-backed Storage Gadget"
746 The File-backed Storage Gadget acts as a USB Mass Storage
747 disk drive. As its storage repository it can use a regular
748 file or a block device (in much the same way as the "loop"
749 device driver), specified as a module parameter.
751 Say "y" to link the driver statically, or "m" to build a
752 dynamically linked module called "g_file_storage".
754 config USB_FILE_STORAGE_TEST
755 bool "File-backed Storage Gadget testing version"
756 depends on USB_FILE_STORAGE
759 Say "y" to generate the larger testing version of the
760 File-backed Storage Gadget, useful for probing the
761 behavior of USB Mass Storage hosts. Not needed for
764 config USB_MASS_STORAGE
765 tristate "Mass Storage Gadget"
768 The Mass Storage Gadget acts as a USB Mass Storage disk drive.
769 As its storage repository it can use a regular file or a block
770 device (in much the same way as the "loop" device driver),
771 specified as a module parameter or sysfs option.
773 This is heavily based on File-backed Storage Gadget and in most
774 cases you will want to use FSG instead. This gadget is mostly
775 here to test the functionality of the Mass Storage Function
776 which may be used with composite framework.
778 Say "y" to link the driver statically, or "m" to build
779 a dynamically linked module called "g_mass_storage". If unsure,
780 consider File-backed Storage Gadget.
783 tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
785 The Serial Gadget talks to the Linux-USB generic serial driver.
786 This driver supports a CDC-ACM module option, which can be used
787 to interoperate with MS-Windows hosts or with the Linux-USB
790 This driver also supports a CDC-OBEX option. You will need a
791 user space OBEX server talking to /dev/ttyGS*, since the kernel
792 itself doesn't implement the OBEX protocol.
794 Say "y" to link the driver statically, or "m" to build a
795 dynamically linked module called "g_serial".
797 For more information, see Documentation/usb/gadget_serial.txt
798 which includes instructions and a "driver info file" needed to
799 make MS-Windows work with CDC ACM.
801 config USB_MIDI_GADGET
802 tristate "MIDI Gadget (EXPERIMENTAL)"
803 depends on SND && EXPERIMENTAL
806 The MIDI Gadget acts as a USB Audio device, with one MIDI
807 input and one MIDI output. These MIDI jacks appear as
808 a sound "card" in the ALSA sound system. Other MIDI
809 connections can then be made on the gadget system, using
810 ALSA's aconnect utility etc.
812 Say "y" to link the driver statically, or "m" to build a
813 dynamically linked module called "g_midi".
816 tristate "Printer Gadget"
818 The Printer Gadget channels data between the USB host and a
819 userspace program driving the print engine. The user space
820 program reads and writes the device file /dev/g_printer to
821 receive or send printer data. It can use ioctl calls to
822 the device file to get or set printer status.
824 Say "y" to link the driver statically, or "m" to build a
825 dynamically linked module called "g_printer".
827 For more information, see Documentation/usb/gadget_printer.txt
828 which includes sample code for accessing the device file.
830 config USB_CDC_COMPOSITE
831 tristate "CDC Composite Device (Ethernet and ACM)"
834 This driver provides two functions in one configuration:
835 a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link.
837 This driver requires four bulk and two interrupt endpoints,
838 plus the ability to handle altsettings. Not all peripheral
839 controllers are that capable.
841 Say "y" to link the driver statically, or "m" to build a
842 dynamically linked module.
845 tristate "Nokia composite gadget"
848 The Nokia composite gadget provides support for acm, obex
849 and phonet in only one composite gadget driver.
851 It's only really useful for N900 hardware. If you're building
852 a kernel for N900, say Y or M here. If unsure, say N.
855 tristate "Multifunction Composite Gadget (EXPERIMENTAL)"
856 depends on BLOCK && NET
857 select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS
859 The Multifunction Composite Gadget provides Ethernet (RNDIS
860 and/or CDC Ethernet), mass storage and ACM serial link
863 You will be asked to choose which of the two configurations is
864 to be available in the gadget. At least one configuration must
865 be chosen to make the gadget usable. Selecting more than one
866 configuration will prevent Windows from automatically detecting
867 the gadget as a composite gadget, so an INF file will be needed to
870 Say "y" to link the driver statically, or "m" to build a
871 dynamically linked module called "g_multi".
873 config USB_G_MULTI_RNDIS
874 bool "RNDIS + CDC Serial + Storage configuration"
875 depends on USB_G_MULTI
878 This option enables a configuration with RNDIS, CDC Serial and
879 Mass Storage functions available in the Multifunction Composite
880 Gadget. This is the configuration dedicated for Windows since RNDIS
881 is Microsoft's protocol.
885 config USB_G_MULTI_CDC
886 bool "CDC Ethernet + CDC Serial + Storage configuration"
887 depends on USB_G_MULTI
890 This option enables a configuration with CDC Ethernet (ECM), CDC
891 Serial and Mass Storage functions available in the Multifunction
897 tristate "HID Gadget"
899 The HID gadget driver provides generic emulation of USB
900 Human Interface Devices (HID).
902 For more information, see Documentation/usb/gadget_hid.txt which
903 includes sample code for accessing the device files.
905 Say "y" to link the driver statically, or "m" to build a
906 dynamically linked module called "g_hid".
909 tristate "EHCI Debug Device Gadget"
911 This gadget emulates an EHCI Debug device. This is useful when you want
912 to interact with an EHCI Debug Port.
914 Say "y" to link the driver statically, or "m" to build a
915 dynamically linked module called "g_dbgp".
919 prompt "EHCI Debug Device mode"
920 default USB_G_DBGP_SERIAL
922 config USB_G_DBGP_PRINTK
923 depends on USB_G_DBGP
926 Directly printk() received data. No interaction.
928 config USB_G_DBGP_SERIAL
929 depends on USB_G_DBGP
932 Userland can interact using /dev/ttyGSxxx.
936 # put drivers that need isochronous transfer support (for audio
937 # or video class gadget drivers), or specific hardware, here.
939 tristate "USB Webcam Gadget"
942 The Webcam Gadget acts as a composite USB Audio and Video Class
943 device. It provides a userspace API to process UVC control requests
944 and stream video data to the host.
946 Say "y" to link the driver statically, or "m" to build a
947 dynamically linked module called "g_webcam".