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_FILES
46 boolean "Debugging information files"
47 depends on USB_GADGET && PROC_FS
49 Some of the drivers in the "gadget" framework can expose
50 debugging information in files such as /proc/driver/udc
51 (for a peripheral controller). The information in these
52 files may help when you're troubleshooting or bringing up a
53 driver on a new board. Enable these files by choosing "Y"
54 here. If in doubt, or to conserve kernel memory, say "N".
56 config USB_GADGET_SELECTED
60 # USB Peripheral Controller Support
63 prompt "USB Peripheral Controller"
66 A USB device uses a controller to talk to its host.
67 Systems should have only one such upstream link.
68 Many controller drivers are platform-specific; these
69 often need board-specific hooks.
71 config USB_GADGET_FSL_USB2
72 boolean "Freescale Highspeed USB DR Peripheral Controller"
73 depends on MPC834x || PPC_MPC831x
74 select USB_GADGET_DUALSPEED
76 Some of Freescale PowerPC processors have a High Speed
77 Dual-Role(DR) USB controller, which supports device mode.
79 The number of programmable endpoints is different through
82 Say "y" to link the driver statically, or "m" to build a
83 dynamically linked module called "fsl_usb2_udc" and force
84 all gadget drivers to also be dynamically linked.
88 depends on USB_GADGET_FSL_USB2
90 select USB_GADGET_SELECTED
92 config USB_GADGET_NET2280
93 boolean "NetChip 228x"
95 select USB_GADGET_DUALSPEED
97 NetChip 2280 / 2282 is a PCI based USB peripheral controller which
98 supports both full and high speed USB 2.0 data transfers.
100 It has six configurable endpoints, as well as endpoint zero
101 (for control transfers) and several endpoints with dedicated
104 Say "y" to link the driver statically, or "m" to build a
105 dynamically linked module called "net2280" and force all
106 gadget drivers to also be dynamically linked.
110 depends on USB_GADGET_NET2280
112 select USB_GADGET_SELECTED
114 config USB_GADGET_PXA2XX
115 boolean "PXA 25x or IXP 4xx"
116 depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX
118 Intel's PXA 25x series XScale ARM-5TE processors include
119 an integrated full speed USB 1.1 device controller. The
120 controller in the IXP 4xx series is register-compatible.
122 It has fifteen fixed-function endpoints, as well as endpoint
123 zero (for control transfers).
125 Say "y" to link the driver statically, or "m" to build a
126 dynamically linked module called "pxa2xx_udc" and force all
127 gadget drivers to also be dynamically linked.
131 depends on USB_GADGET_PXA2XX
133 select USB_GADGET_SELECTED
135 # if there's only one gadget driver, using only two bulk endpoints,
136 # don't waste memory for the other endpoints
137 config USB_PXA2XX_SMALL
138 depends on USB_GADGET_PXA2XX
140 default n if USB_ETH_RNDIS
141 default y if USB_ZERO
143 default y if USB_G_SERIAL
145 config USB_GADGET_GOKU
146 boolean "Toshiba TC86C001 'Goku-S'"
149 The Toshiba TC86C001 is a PCI device which includes controllers
150 for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI).
152 The device controller has three configurable (bulk or interrupt)
153 endpoints, plus endpoint zero (for control transfers).
155 Say "y" to link the driver statically, or "m" to build a
156 dynamically linked module called "goku_udc" and to force all
157 gadget drivers to also be dynamically linked.
161 depends on USB_GADGET_GOKU
163 select USB_GADGET_SELECTED
166 config USB_GADGET_LH7A40X
168 depends on ARCH_LH7A40X
170 This driver provides USB Device Controller driver for LH7A40x
174 depends on USB_GADGET_LH7A40X
176 select USB_GADGET_SELECTED
179 config USB_GADGET_OMAP
180 boolean "OMAP USB Device Controller"
182 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
184 Many Texas Instruments OMAP processors have flexible full
185 speed USB device controllers, with support for up to 30
186 endpoints (plus endpoint zero). This driver supports the
187 controller in the OMAP 1611, and should work with controllers
188 in other OMAP processors too, given minor tweaks.
190 Say "y" to link the driver statically, or "m" to build a
191 dynamically linked module called "omap_udc" and force all
192 gadget drivers to also be dynamically linked.
196 depends on USB_GADGET_OMAP
198 select USB_GADGET_SELECTED
201 boolean "OTG Support"
202 depends on USB_GADGET_OMAP && ARCH_OMAP_OTG && USB_OHCI_HCD
204 The most notable feature of USB OTG is support for a
205 "Dual-Role" device, which can act as either a device
206 or a host. The initial role choice can be changed
207 later, when two dual-role devices talk to each other.
209 Select this only if your OMAP board has a Mini-AB connector.
211 config USB_GADGET_AT91
212 boolean "AT91 USB Device Port"
213 depends on ARCH_AT91 && !ARCH_AT91SAM9RL
214 select USB_GADGET_SELECTED
216 Many Atmel AT91 processors (such as the AT91RM2000) have a
217 full speed USB Device Port with support for five configurable
218 endpoints (plus endpoint zero).
220 Say "y" to link the driver statically, or "m" to build a
221 dynamically linked module called "at91_udc" and force all
222 gadget drivers to also be dynamically linked.
226 depends on USB_GADGET_AT91
229 config USB_GADGET_DUMMY_HCD
230 boolean "Dummy HCD (DEVELOPMENT)"
231 depends on (USB=y || (USB=m && USB_GADGET=m)) && EXPERIMENTAL
232 select USB_GADGET_DUALSPEED
234 This host controller driver emulates USB, looping all data transfer
235 requests back to a USB "gadget driver" in the same host. The host
236 side is the master; the gadget side is the slave. Gadget drivers
237 can be high, full, or low speed; and they have access to endpoints
238 like those from NET2280, PXA2xx, or SA1100 hardware.
240 This may help in some stages of creating a driver to embed in a
241 Linux device, since it lets you debug several parts of the gadget
242 driver without its hardware or drivers being involved.
244 Since such a gadget side driver needs to interoperate with a host
245 side Linux-USB device driver, this may help to debug both sides
246 of a USB protocol stack.
248 Say "y" to link the driver statically, or "m" to build a
249 dynamically linked module called "dummy_hcd" and force all
250 gadget drivers to also be dynamically linked.
254 depends on USB_GADGET_DUMMY_HCD
256 select USB_GADGET_SELECTED
258 # NOTE: Please keep dummy_hcd LAST so that "real hardware" appears
259 # first and will be selected by default.
263 config USB_GADGET_DUALSPEED
265 depends on USB_GADGET
268 Means that gadget drivers should include extra descriptors
269 and code to handle dual-speed controllers.
275 tristate "USB Gadget Drivers"
276 depends on USB_GADGET && USB_GADGET_SELECTED
279 A Linux "Gadget Driver" talks to the USB Peripheral Controller
280 driver through the abstract "gadget" API. Some other operating
281 systems call these "client" drivers, of which "class drivers"
282 are a subset (implementing a USB device class specification).
283 A gadget driver implements one or more USB functions using
284 the peripheral hardware.
286 Gadget drivers are hardware-neutral, or "platform independent",
287 except that they sometimes must understand quirks or limitations
288 of the particular controllers they work with. For example, when
289 a controller doesn't support alternate configurations or provide
290 enough of the right types of endpoints, the gadget driver might
291 not be able work with that controller, or might need to implement
292 a less common variant of a device class protocol.
294 # this first set of drivers all depend on bulk-capable hardware.
297 tristate "Gadget Zero (DEVELOPMENT)"
298 depends on EXPERIMENTAL
300 Gadget Zero is a two-configuration device. It either sinks and
301 sources bulk data; or it loops back a configurable number of
302 transfers. It also implements control requests, for "chapter 9"
303 conformance. The driver needs only two bulk-capable endpoints, so
304 it can work on top of most device-side usb controllers. It's
305 useful for testing, and is also a working example showing how
306 USB "gadget drivers" can be written.
308 Make this be the first driver you try using on top of any new
309 USB peripheral controller driver. Then you can use host-side
310 test software, like the "usbtest" driver, to put your hardware
311 and its driver through a basic set of functional tests.
313 Gadget Zero also works with the host-side "usb-skeleton" driver,
314 and with many kinds of host-side test software. You may need
315 to tweak product and vendor IDs before host software knows about
316 this device, and arrange to select an appropriate configuration.
318 Say "y" to link the driver statically, or "m" to build a
319 dynamically linked module called "g_zero".
321 config USB_ZERO_HNPTEST
322 boolean "HNP Test Device"
323 depends on USB_ZERO && USB_OTG
325 You can configure this device to enumerate using the device
326 identifiers of the USB-OTG test device. That means that when
327 this gadget connects to another OTG device, with this one using
328 the "B-Peripheral" role, that device will use HNP to let this
329 one serve as the USB host instead (in the "B-Host" role).
332 tristate "Ethernet Gadget (with CDC Ethernet support)"
335 This driver implements Ethernet style communication, in either
338 - The "Communication Device Class" (CDC) Ethernet Control Model.
339 That protocol is often avoided with pure Ethernet adapters, in
340 favor of simpler vendor-specific hardware, but is widely
341 supported by firmware for smart network devices.
343 - On hardware can't implement that protocol, a simple CDC subset
344 is used, placing fewer demands on USB.
346 RNDIS support is a third option, more demanding than that subset.
348 Within the USB device, this gadget driver exposes a network device
349 "usbX", where X depends on what other networking devices you have.
350 Treat it like a two-node Ethernet link: host, and gadget.
352 The Linux-USB host-side "usbnet" driver interoperates with this
353 driver, so that deep I/O queues can be supported. On 2.4 kernels,
354 use "CDCEther" instead, if you're using the CDC option. That CDC
355 mode should also interoperate with standard CDC Ethernet class
356 drivers on other host operating systems.
358 Say "y" to link the driver statically, or "m" to build a
359 dynamically linked module called "g_ether".
362 bool "RNDIS support (EXPERIMENTAL)"
363 depends on USB_ETH && EXPERIMENTAL
366 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
367 and Microsoft provides redistributable binary RNDIS drivers for
368 older versions of Windows.
370 If you say "y" here, the Ethernet gadget driver will try to provide
371 a second device configuration, supporting RNDIS to talk to such
374 To make MS-Windows work with this, use Documentation/usb/linux.inf
375 as the "driver info file". For versions of MS-Windows older than
376 XP, you'll need to download drivers from Microsoft's website; a URL
377 is given in comments found in that info file.
380 tristate "Gadget Filesystem (EXPERIMENTAL)"
381 depends on EXPERIMENTAL
383 This driver provides a filesystem based API that lets user mode
384 programs implement a single-configuration USB device, including
385 endpoint I/O and control requests that don't relate to enumeration.
386 All endpoints, transfer speeds, and transfer types supported by
387 the hardware are available, through read() and write() calls.
389 Say "y" to link the driver statically, or "m" to build a
390 dynamically linked module called "gadgetfs".
392 config USB_FILE_STORAGE
393 tristate "File-backed Storage Gadget"
396 The File-backed Storage Gadget acts as a USB Mass Storage
397 disk drive. As its storage repository it can use a regular
398 file or a block device (in much the same way as the "loop"
399 device driver), specified as a module parameter.
401 Say "y" to link the driver statically, or "m" to build a
402 dynamically linked module called "g_file_storage".
404 config USB_FILE_STORAGE_TEST
405 bool "File-backed Storage Gadget testing version"
406 depends on USB_FILE_STORAGE
409 Say "y" to generate the larger testing version of the
410 File-backed Storage Gadget, useful for probing the
411 behavior of USB Mass Storage hosts. Not needed for
415 tristate "Serial Gadget (with CDC ACM support)"
417 The Serial Gadget talks to the Linux-USB generic serial driver.
418 This driver supports a CDC-ACM module option, which can be used
419 to interoperate with MS-Windows hosts or with the Linux-USB
422 Say "y" to link the driver statically, or "m" to build a
423 dynamically linked module called "g_serial".
425 For more information, see Documentation/usb/gadget_serial.txt
426 which includes instructions and a "driver info file" needed to
427 make MS-Windows work with this driver.
429 config USB_MIDI_GADGET
430 tristate "MIDI Gadget (EXPERIMENTAL)"
431 depends on SND && EXPERIMENTAL
434 The MIDI Gadget acts as a USB Audio device, with one MIDI
435 input and one MIDI output. These MIDI jacks appear as
436 a sound "card" in the ALSA sound system. Other MIDI
437 connections can then be made on the gadget system, using
438 ALSA's aconnect utility etc.
440 Say "y" to link the driver statically, or "m" to build a
441 dynamically linked module called "g_midi".
444 # put drivers that need isochronous transfer support (for audio
445 # or video class gadget drivers), or specific hardware, here.