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).
15 menu "USB Gadget Support"
18 tristate "Support for USB Gadgets"
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.
45 config USB_GADGET_DEBUG
46 boolean "Debugging messages"
47 depends on USB_GADGET && DEBUG_KERNEL && EXPERIMENTAL
49 Many controller and gadget drivers will print some debugging
50 messages if you use this option to ask for those messages.
52 Avoid enabling these messages, even if you're actively
53 debugging such a driver. Many drivers will emit so many
54 messages that the driver timings are affected, which will
55 either create new failure modes or remove the one you're
56 trying to track down. Never enable these messages for a
59 config USB_GADGET_DEBUG_FILES
60 boolean "Debugging information files"
61 depends on USB_GADGET && PROC_FS
63 Some of the drivers in the "gadget" framework can expose
64 debugging information in files such as /proc/driver/udc
65 (for a peripheral controller). The information in these
66 files may help when you're troubleshooting or bringing up a
67 driver on a new board. Enable these files by choosing "Y"
68 here. If in doubt, or to conserve kernel memory, say "N".
70 config USB_GADGET_SELECTED
74 # USB Peripheral Controller Support
77 prompt "USB Peripheral Controller"
80 A USB device uses a controller to talk to its host.
81 Systems should have only one such upstream link.
82 Many controller drivers are platform-specific; these
83 often need board-specific hooks.
85 config USB_GADGET_FSL_USB2
86 boolean "Freescale Highspeed USB DR Peripheral Controller"
87 depends on MPC834x || PPC_MPC831x
88 select USB_GADGET_DUALSPEED
90 Some of Freescale PowerPC processors have a High Speed
91 Dual-Role(DR) USB controller, which supports device mode.
93 The number of programmable endpoints is different through
96 Say "y" to link the driver statically, or "m" to build a
97 dynamically linked module called "fsl_usb2_udc" and force
98 all gadget drivers to also be dynamically linked.
102 depends on USB_GADGET_FSL_USB2
104 select USB_GADGET_SELECTED
106 config USB_GADGET_NET2280
107 boolean "NetChip 228x"
109 select USB_GADGET_DUALSPEED
111 NetChip 2280 / 2282 is a PCI based USB peripheral controller which
112 supports both full and high speed USB 2.0 data transfers.
114 It has six configurable endpoints, as well as endpoint zero
115 (for control transfers) and several endpoints with dedicated
118 Say "y" to link the driver statically, or "m" to build a
119 dynamically linked module called "net2280" and force all
120 gadget drivers to also be dynamically linked.
124 depends on USB_GADGET_NET2280
126 select USB_GADGET_SELECTED
128 config USB_GADGET_PXA2XX
129 boolean "PXA 25x or IXP 4xx"
130 depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX
132 Intel's PXA 25x series XScale ARM-5TE processors include
133 an integrated full speed USB 1.1 device controller. The
134 controller in the IXP 4xx series is register-compatible.
136 It has fifteen fixed-function endpoints, as well as endpoint
137 zero (for control transfers).
139 Say "y" to link the driver statically, or "m" to build a
140 dynamically linked module called "pxa2xx_udc" and force all
141 gadget drivers to also be dynamically linked.
145 depends on USB_GADGET_PXA2XX
147 select USB_GADGET_SELECTED
149 # if there's only one gadget driver, using only two bulk endpoints,
150 # don't waste memory for the other endpoints
151 config USB_PXA2XX_SMALL
152 depends on USB_GADGET_PXA2XX
154 default n if USB_ETH_RNDIS
155 default y if USB_ZERO
157 default y if USB_G_SERIAL
159 config USB_GADGET_GOKU
160 boolean "Toshiba TC86C001 'Goku-S'"
163 The Toshiba TC86C001 is a PCI device which includes controllers
164 for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI).
166 The device controller has three configurable (bulk or interrupt)
167 endpoints, plus endpoint zero (for control transfers).
169 Say "y" to link the driver statically, or "m" to build a
170 dynamically linked module called "goku_udc" and to force all
171 gadget drivers to also be dynamically linked.
175 depends on USB_GADGET_GOKU
177 select USB_GADGET_SELECTED
180 config USB_GADGET_LH7A40X
182 depends on ARCH_LH7A40X
184 This driver provides USB Device Controller driver for LH7A40x
188 depends on USB_GADGET_LH7A40X
190 select USB_GADGET_SELECTED
193 config USB_GADGET_OMAP
194 boolean "OMAP USB Device Controller"
196 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
198 Many Texas Instruments OMAP processors have flexible full
199 speed USB device controllers, with support for up to 30
200 endpoints (plus endpoint zero). This driver supports the
201 controller in the OMAP 1611, and should work with controllers
202 in other OMAP processors too, given minor tweaks.
204 Say "y" to link the driver statically, or "m" to build a
205 dynamically linked module called "omap_udc" and force all
206 gadget drivers to also be dynamically linked.
210 depends on USB_GADGET_OMAP
212 select USB_GADGET_SELECTED
215 boolean "OTG Support"
216 depends on USB_GADGET_OMAP && ARCH_OMAP_OTG && USB_OHCI_HCD
218 The most notable feature of USB OTG is support for a
219 "Dual-Role" device, which can act as either a device
220 or a host. The initial role choice can be changed
221 later, when two dual-role devices talk to each other.
223 Select this only if your OMAP board has a Mini-AB connector.
225 config USB_GADGET_S3C2410
226 boolean "S3C2410 USB Device Controller"
227 depends on ARCH_S3C2410
229 Samsung's S3C2410 is an ARM-4 processor with an integrated
230 full speed USB 1.1 device controller. It has 4 configurable
231 endpoints, as well as endpoint zero (for control transfers).
233 This driver has been tested on the S3C2410, S3C2412, and
238 depends on USB_GADGET_S3C2410
240 select USB_GADGET_SELECTED
242 config USB_S3C2410_DEBUG
243 boolean "S3C2410 udc debug messages"
244 depends on USB_GADGET_S3C2410
246 config USB_GADGET_AT91
247 boolean "AT91 USB Device Port"
248 depends on ARCH_AT91 && !ARCH_AT91SAM9RL
249 select USB_GADGET_SELECTED
251 Many Atmel AT91 processors (such as the AT91RM2000) have a
252 full speed USB Device Port with support for five configurable
253 endpoints (plus endpoint zero).
255 Say "y" to link the driver statically, or "m" to build a
256 dynamically linked module called "at91_udc" and force all
257 gadget drivers to also be dynamically linked.
261 depends on USB_GADGET_AT91
264 config USB_GADGET_M66592
265 boolean "M66592 driver"
266 select USB_GADGET_DUALSPEED
268 M66592 is a USB 2.0 peripheral controller.
270 It has seven configurable endpoints, and endpoint zero.
272 Say "y" to link the driver statically, or "m" to build a
273 dynamically linked module called "m66592_udc" and force all
274 gadget drivers to also be dynamically linked.
278 depends on USB_GADGET_M66592
280 select USB_GADGET_SELECTED
282 config USB_GADGET_DUMMY_HCD
283 boolean "Dummy HCD (DEVELOPMENT)"
284 depends on (USB=y || (USB=m && USB_GADGET=m)) && EXPERIMENTAL
285 select USB_GADGET_DUALSPEED
287 This host controller driver emulates USB, looping all data transfer
288 requests back to a USB "gadget driver" in the same host. The host
289 side is the master; the gadget side is the slave. Gadget drivers
290 can be high, full, or low speed; and they have access to endpoints
291 like those from NET2280, PXA2xx, or SA1100 hardware.
293 This may help in some stages of creating a driver to embed in a
294 Linux device, since it lets you debug several parts of the gadget
295 driver without its hardware or drivers being involved.
297 Since such a gadget side driver needs to interoperate with a host
298 side Linux-USB device driver, this may help to debug both sides
299 of a USB protocol stack.
301 Say "y" to link the driver statically, or "m" to build a
302 dynamically linked module called "dummy_hcd" and force all
303 gadget drivers to also be dynamically linked.
307 depends on USB_GADGET_DUMMY_HCD
309 select USB_GADGET_SELECTED
311 # NOTE: Please keep dummy_hcd LAST so that "real hardware" appears
312 # first and will be selected by default.
316 config USB_GADGET_DUALSPEED
318 depends on USB_GADGET
321 Means that gadget drivers should include extra descriptors
322 and code to handle dual-speed controllers.
328 tristate "USB Gadget Drivers"
329 depends on USB_GADGET && USB_GADGET_SELECTED
332 A Linux "Gadget Driver" talks to the USB Peripheral Controller
333 driver through the abstract "gadget" API. Some other operating
334 systems call these "client" drivers, of which "class drivers"
335 are a subset (implementing a USB device class specification).
336 A gadget driver implements one or more USB functions using
337 the peripheral hardware.
339 Gadget drivers are hardware-neutral, or "platform independent",
340 except that they sometimes must understand quirks or limitations
341 of the particular controllers they work with. For example, when
342 a controller doesn't support alternate configurations or provide
343 enough of the right types of endpoints, the gadget driver might
344 not be able work with that controller, or might need to implement
345 a less common variant of a device class protocol.
347 # this first set of drivers all depend on bulk-capable hardware.
350 tristate "Gadget Zero (DEVELOPMENT)"
351 depends on EXPERIMENTAL
353 Gadget Zero is a two-configuration device. It either sinks and
354 sources bulk data; or it loops back a configurable number of
355 transfers. It also implements control requests, for "chapter 9"
356 conformance. The driver needs only two bulk-capable endpoints, so
357 it can work on top of most device-side usb controllers. It's
358 useful for testing, and is also a working example showing how
359 USB "gadget drivers" can be written.
361 Make this be the first driver you try using on top of any new
362 USB peripheral controller driver. Then you can use host-side
363 test software, like the "usbtest" driver, to put your hardware
364 and its driver through a basic set of functional tests.
366 Gadget Zero also works with the host-side "usb-skeleton" driver,
367 and with many kinds of host-side test software. You may need
368 to tweak product and vendor IDs before host software knows about
369 this device, and arrange to select an appropriate configuration.
371 Say "y" to link the driver statically, or "m" to build a
372 dynamically linked module called "g_zero".
374 config USB_ZERO_HNPTEST
375 boolean "HNP Test Device"
376 depends on USB_ZERO && USB_OTG
378 You can configure this device to enumerate using the device
379 identifiers of the USB-OTG test device. That means that when
380 this gadget connects to another OTG device, with this one using
381 the "B-Peripheral" role, that device will use HNP to let this
382 one serve as the USB host instead (in the "B-Host" role).
385 tristate "Ethernet Gadget (with CDC Ethernet support)"
388 This driver implements Ethernet style communication, in either
391 - The "Communication Device Class" (CDC) Ethernet Control Model.
392 That protocol is often avoided with pure Ethernet adapters, in
393 favor of simpler vendor-specific hardware, but is widely
394 supported by firmware for smart network devices.
396 - On hardware can't implement that protocol, a simple CDC subset
397 is used, placing fewer demands on USB.
399 RNDIS support is a third option, more demanding than that subset.
401 Within the USB device, this gadget driver exposes a network device
402 "usbX", where X depends on what other networking devices you have.
403 Treat it like a two-node Ethernet link: host, and gadget.
405 The Linux-USB host-side "usbnet" driver interoperates with this
406 driver, so that deep I/O queues can be supported. On 2.4 kernels,
407 use "CDCEther" instead, if you're using the CDC option. That CDC
408 mode should also interoperate with standard CDC Ethernet class
409 drivers on other host operating systems.
411 Say "y" to link the driver statically, or "m" to build a
412 dynamically linked module called "g_ether".
415 bool "RNDIS support (EXPERIMENTAL)"
416 depends on USB_ETH && EXPERIMENTAL
419 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
420 and Microsoft provides redistributable binary RNDIS drivers for
421 older versions of Windows.
423 If you say "y" here, the Ethernet gadget driver will try to provide
424 a second device configuration, supporting RNDIS to talk to such
427 To make MS-Windows work with this, use Documentation/usb/linux.inf
428 as the "driver info file". For versions of MS-Windows older than
429 XP, you'll need to download drivers from Microsoft's website; a URL
430 is given in comments found in that info file.
433 tristate "Gadget Filesystem (EXPERIMENTAL)"
434 depends on EXPERIMENTAL
436 This driver provides a filesystem based API that lets user mode
437 programs implement a single-configuration USB device, including
438 endpoint I/O and control requests that don't relate to enumeration.
439 All endpoints, transfer speeds, and transfer types supported by
440 the hardware are available, through read() and write() calls.
442 Say "y" to link the driver statically, or "m" to build a
443 dynamically linked module called "gadgetfs".
445 config USB_FILE_STORAGE
446 tristate "File-backed Storage Gadget"
449 The File-backed Storage Gadget acts as a USB Mass Storage
450 disk drive. As its storage repository it can use a regular
451 file or a block device (in much the same way as the "loop"
452 device driver), specified as a module parameter.
454 Say "y" to link the driver statically, or "m" to build a
455 dynamically linked module called "g_file_storage".
457 config USB_FILE_STORAGE_TEST
458 bool "File-backed Storage Gadget testing version"
459 depends on USB_FILE_STORAGE
462 Say "y" to generate the larger testing version of the
463 File-backed Storage Gadget, useful for probing the
464 behavior of USB Mass Storage hosts. Not needed for
468 tristate "Serial Gadget (with CDC ACM support)"
470 The Serial Gadget talks to the Linux-USB generic serial driver.
471 This driver supports a CDC-ACM module option, which can be used
472 to interoperate with MS-Windows hosts or with the Linux-USB
475 Say "y" to link the driver statically, or "m" to build a
476 dynamically linked module called "g_serial".
478 For more information, see Documentation/usb/gadget_serial.txt
479 which includes instructions and a "driver info file" needed to
480 make MS-Windows work with this driver.
482 config USB_MIDI_GADGET
483 tristate "MIDI Gadget (EXPERIMENTAL)"
484 depends on SND && EXPERIMENTAL
487 The MIDI Gadget acts as a USB Audio device, with one MIDI
488 input and one MIDI output. These MIDI jacks appear as
489 a sound "card" in the ALSA sound system. Other MIDI
490 connections can then be made on the gadget system, using
491 ALSA's aconnect utility etc.
493 Say "y" to link the driver statically, or "m" to build a
494 dynamically linked module called "g_midi".
497 # put drivers that need isochronous transfer support (for audio
498 # or video class gadget drivers), or specific hardware, here.