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_NET2280
72 boolean "NetChip 228x"
74 select USB_GADGET_DUALSPEED
76 NetChip 2280 / 2282 is a PCI based USB peripheral controller which
77 supports both full and high speed USB 2.0 data transfers.
79 It has six configurable endpoints, as well as endpoint zero
80 (for control transfers) and several endpoints with dedicated
83 Say "y" to link the driver statically, or "m" to build a
84 dynamically linked module called "net2280" and force all
85 gadget drivers to also be dynamically linked.
89 depends on USB_GADGET_NET2280
91 select USB_GADGET_SELECTED
93 config USB_GADGET_PXA2XX
94 boolean "PXA 25x or IXP 4xx"
95 depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX
97 Intel's PXA 25x series XScale ARM-5TE processors include
98 an integrated full speed USB 1.1 device controller. The
99 controller in the IXP 4xx series is register-compatible.
101 It has fifteen fixed-function endpoints, as well as endpoint
102 zero (for control transfers).
104 Say "y" to link the driver statically, or "m" to build a
105 dynamically linked module called "pxa2xx_udc" and force all
106 gadget drivers to also be dynamically linked.
110 depends on USB_GADGET_PXA2XX
112 select USB_GADGET_SELECTED
114 # if there's only one gadget driver, using only two bulk endpoints,
115 # don't waste memory for the other endpoints
116 config USB_PXA2XX_SMALL
117 depends on USB_GADGET_PXA2XX
119 default n if USB_ETH_RNDIS
120 default y if USB_ZERO
122 default y if USB_G_SERIAL
124 config USB_GADGET_GOKU
125 boolean "Toshiba TC86C001 'Goku-S'"
128 The Toshiba TC86C001 is a PCI device which includes controllers
129 for full speed USB devices, IDE, I2C, SIO, plus a USB host (OHCI).
131 The device controller has three configurable (bulk or interrupt)
132 endpoints, plus endpoint zero (for control transfers).
134 Say "y" to link the driver statically, or "m" to build a
135 dynamically linked module called "goku_udc" and to force all
136 gadget drivers to also be dynamically linked.
140 depends on USB_GADGET_GOKU
142 select USB_GADGET_SELECTED
145 config USB_GADGET_LH7A40X
147 depends on ARCH_LH7A40X
149 This driver provides USB Device Controller driver for LH7A40x
153 depends on USB_GADGET_LH7A40X
155 select USB_GADGET_SELECTED
158 config USB_GADGET_OMAP
159 boolean "OMAP USB Device Controller"
161 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
163 Many Texas Instruments OMAP processors have flexible full
164 speed USB device controllers, with support for up to 30
165 endpoints (plus endpoint zero). This driver supports the
166 controller in the OMAP 1611, and should work with controllers
167 in other OMAP processors too, given minor tweaks.
169 Say "y" to link the driver statically, or "m" to build a
170 dynamically linked module called "omap_udc" and force all
171 gadget drivers to also be dynamically linked.
175 depends on USB_GADGET_OMAP
177 select USB_GADGET_SELECTED
180 boolean "OTG Support"
181 depends on USB_GADGET_OMAP && ARCH_OMAP_OTG && USB_OHCI_HCD
183 The most notable feature of USB OTG is support for a
184 "Dual-Role" device, which can act as either a device
185 or a host. The initial role choice can be changed
186 later, when two dual-role devices talk to each other.
188 Select this only if your OMAP board has a Mini-AB connector.
190 config USB_GADGET_AT91
191 boolean "AT91 USB Device Port"
193 select USB_GADGET_SELECTED
195 Many Atmel AT91 processors (such as the AT91RM2000) have a
196 full speed USB Device Port with support for five configurable
197 endpoints (plus endpoint zero).
199 Say "y" to link the driver statically, or "m" to build a
200 dynamically linked module called "at91_udc" and force all
201 gadget drivers to also be dynamically linked.
205 depends on USB_GADGET_AT91
208 config USB_GADGET_DUMMY_HCD
209 boolean "Dummy HCD (DEVELOPMENT)"
210 depends on (USB=y || (USB=m && USB_GADGET=m)) && EXPERIMENTAL
211 select USB_GADGET_DUALSPEED
213 This host controller driver emulates USB, looping all data transfer
214 requests back to a USB "gadget driver" in the same host. The host
215 side is the master; the gadget side is the slave. Gadget drivers
216 can be high, full, or low speed; and they have access to endpoints
217 like those from NET2280, PXA2xx, or SA1100 hardware.
219 This may help in some stages of creating a driver to embed in a
220 Linux device, since it lets you debug several parts of the gadget
221 driver without its hardware or drivers being involved.
223 Since such a gadget side driver needs to interoperate with a host
224 side Linux-USB device driver, this may help to debug both sides
225 of a USB protocol stack.
227 Say "y" to link the driver statically, or "m" to build a
228 dynamically linked module called "dummy_hcd" and force all
229 gadget drivers to also be dynamically linked.
233 depends on USB_GADGET_DUMMY_HCD
235 select USB_GADGET_SELECTED
237 # NOTE: Please keep dummy_hcd LAST so that "real hardware" appears
238 # first and will be selected by default.
242 config USB_GADGET_DUALSPEED
244 depends on USB_GADGET
247 Means that gadget drivers should include extra descriptors
248 and code to handle dual-speed controllers.
254 tristate "USB Gadget Drivers"
255 depends on USB_GADGET && USB_GADGET_SELECTED
258 A Linux "Gadget Driver" talks to the USB Peripheral Controller
259 driver through the abstract "gadget" API. Some other operating
260 systems call these "client" drivers, of which "class drivers"
261 are a subset (implementing a USB device class specification).
262 A gadget driver implements one or more USB functions using
263 the peripheral hardware.
265 Gadget drivers are hardware-neutral, or "platform independent",
266 except that they sometimes must understand quirks or limitations
267 of the particular controllers they work with. For example, when
268 a controller doesn't support alternate configurations or provide
269 enough of the right types of endpoints, the gadget driver might
270 not be able work with that controller, or might need to implement
271 a less common variant of a device class protocol.
273 # this first set of drivers all depend on bulk-capable hardware.
276 tristate "Gadget Zero (DEVELOPMENT)"
277 depends on EXPERIMENTAL
279 Gadget Zero is a two-configuration device. It either sinks and
280 sources bulk data; or it loops back a configurable number of
281 transfers. It also implements control requests, for "chapter 9"
282 conformance. The driver needs only two bulk-capable endpoints, so
283 it can work on top of most device-side usb controllers. It's
284 useful for testing, and is also a working example showing how
285 USB "gadget drivers" can be written.
287 Make this be the first driver you try using on top of any new
288 USB peripheral controller driver. Then you can use host-side
289 test software, like the "usbtest" driver, to put your hardware
290 and its driver through a basic set of functional tests.
292 Gadget Zero also works with the host-side "usb-skeleton" driver,
293 and with many kinds of host-side test software. You may need
294 to tweak product and vendor IDs before host software knows about
295 this device, and arrange to select an appropriate configuration.
297 Say "y" to link the driver statically, or "m" to build a
298 dynamically linked module called "g_zero".
300 config USB_ZERO_HNPTEST
301 boolean "HNP Test Device"
302 depends on USB_ZERO && USB_OTG
304 You can configure this device to enumerate using the device
305 identifiers of the USB-OTG test device. That means that when
306 this gadget connects to another OTG device, with this one using
307 the "B-Peripheral" role, that device will use HNP to let this
308 one serve as the USB host instead (in the "B-Host" role).
311 tristate "Ethernet Gadget (with CDC Ethernet support)"
314 This driver implements Ethernet style communication, in either
317 - The "Communication Device Class" (CDC) Ethernet Control Model.
318 That protocol is often avoided with pure Ethernet adapters, in
319 favor of simpler vendor-specific hardware, but is widely
320 supported by firmware for smart network devices.
322 - On hardware can't implement that protocol, a simple CDC subset
323 is used, placing fewer demands on USB.
325 RNDIS support is a third option, more demanding than that subset.
327 Within the USB device, this gadget driver exposes a network device
328 "usbX", where X depends on what other networking devices you have.
329 Treat it like a two-node Ethernet link: host, and gadget.
331 The Linux-USB host-side "usbnet" driver interoperates with this
332 driver, so that deep I/O queues can be supported. On 2.4 kernels,
333 use "CDCEther" instead, if you're using the CDC option. That CDC
334 mode should also interoperate with standard CDC Ethernet class
335 drivers on other host operating systems.
337 Say "y" to link the driver statically, or "m" to build a
338 dynamically linked module called "g_ether".
341 bool "RNDIS support (EXPERIMENTAL)"
342 depends on USB_ETH && EXPERIMENTAL
345 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
346 and Microsoft provides redistributable binary RNDIS drivers for
347 older versions of Windows.
349 If you say "y" here, the Ethernet gadget driver will try to provide
350 a second device configuration, supporting RNDIS to talk to such
353 To make MS-Windows work with this, use Documentation/usb/linux.inf
354 as the "driver info file". For versions of MS-Windows older than
355 XP, you'll need to download drivers from Microsoft's website; a URL
356 is given in comments found in that info file.
359 tristate "Gadget Filesystem (EXPERIMENTAL)"
360 depends on EXPERIMENTAL
362 This driver provides a filesystem based API that lets user mode
363 programs implement a single-configuration USB device, including
364 endpoint I/O and control requests that don't relate to enumeration.
365 All endpoints, transfer speeds, and transfer types supported by
366 the hardware are available, through read() and write() calls.
368 Say "y" to link the driver statically, or "m" to build a
369 dynamically linked module called "gadgetfs".
371 config USB_FILE_STORAGE
372 tristate "File-backed Storage Gadget"
374 The File-backed Storage Gadget acts as a USB Mass Storage
375 disk drive. As its storage repository it can use a regular
376 file or a block device (in much the same way as the "loop"
377 device driver), specified as a module parameter.
379 Say "y" to link the driver statically, or "m" to build a
380 dynamically linked module called "g_file_storage".
382 config USB_FILE_STORAGE_TEST
383 bool "File-backed Storage Gadget testing version"
384 depends on USB_FILE_STORAGE
387 Say "y" to generate the larger testing version of the
388 File-backed Storage Gadget, useful for probing the
389 behavior of USB Mass Storage hosts. Not needed for
393 tristate "Serial Gadget (with CDC ACM support)"
395 The Serial Gadget talks to the Linux-USB generic serial driver.
396 This driver supports a CDC-ACM module option, which can be used
397 to interoperate with MS-Windows hosts or with the Linux-USB
400 Say "y" to link the driver statically, or "m" to build a
401 dynamically linked module called "g_serial".
403 For more information, see Documentation/usb/gadget_serial.txt
404 which includes instructions and a "driver info file" needed to
405 make MS-Windows work with this driver.
407 config USB_MIDI_GADGET
408 tristate "MIDI Gadget (EXPERIMENTAL)"
409 depends on SND && EXPERIMENTAL
412 The MIDI Gadget acts as a USB Audio device, with one MIDI
413 input and one MIDI output. These MIDI jacks appear as
414 a sound "card" in the ALSA sound system. Other MIDI
415 connections can then be made on the gadget system, using
416 ALSA's aconnect utility etc.
418 Say "y" to link the driver statically, or "m" to build a
419 dynamically linked module called "g_midi".
422 # put drivers that need isochronous transfer support (for audio
423 # or video class gadget drivers), or specific hardware, here.