1# 2# USB Gadget support on a system involves 3# (a) a peripheral controller, and 4# (b) the gadget driver using it. 5# 6# NOTE: Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !! 7# 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. 11# 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). 14# 15 16menuconfig USB_GADGET 17 tristate "USB Gadget Support" 18 help 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. 23 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 30 motherboards. 31 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.) 37 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). 40 41 For more information, see <http://www.linux-usb.org/gadget> and 42 the kernel DocBook documentation for this API. 43 44if USB_GADGET 45 46config USB_GADGET_DEBUG 47 boolean "Debugging messages (DEVELOPMENT)" 48 depends on DEBUG_KERNEL 49 help 50 Many controller and gadget drivers will print some debugging 51 messages if you use this option to ask for those messages. 52 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 58 production build. 59 60config USB_GADGET_DEBUG_FILES 61 boolean "Debugging information files (DEVELOPMENT)" 62 depends on PROC_FS 63 help 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". 70 71config USB_GADGET_DEBUG_FS 72 boolean "Debugging information files in debugfs (DEVELOPMENT)" 73 depends on DEBUG_FS 74 help 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". 81 82config USB_GADGET_VBUS_DRAW 83 int "Maximum VBUS Power usage (2-500 mA)" 84 range 2 500 85 default 2 86 help 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. 91 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. 95 96 This value will be used except for system-specific gadget 97 drivers that have more specific information. 98 99config USB_GADGET_SELECTED 100 boolean 101 102# 103# USB Peripheral Controller Support 104# 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. 111# 112choice 113 prompt "USB Peripheral Controller" 114 depends on USB_GADGET 115 help 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. 120 121# 122# Integrated controllers 123# 124 125config USB_GADGET_AT91 126 boolean "Atmel AT91 USB Device Port" 127 depends on ARCH_AT91 && !ARCH_AT91SAM9RL && !ARCH_AT91CAP9 128 select USB_GADGET_SELECTED 129 help 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). 133 134 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. 137 138config USB_AT91 139 tristate 140 depends on USB_GADGET_AT91 141 default USB_GADGET 142 143config USB_GADGET_ATMEL_USBA 144 boolean "Atmel USBA" 145 select USB_GADGET_DUALSPEED 146 depends on AVR32 || ARCH_AT91CAP9 || ARCH_AT91SAM9RL 147 help 148 USBA is the integrated high-speed USB Device controller on 149 the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel. 150 151config USB_ATMEL_USBA 152 tristate 153 depends on USB_GADGET_ATMEL_USBA 154 default USB_GADGET 155 select USB_GADGET_SELECTED 156 157config 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 help 162 Some of Freescale PowerPC processors have a High Speed 163 Dual-Role(DR) USB controller, which supports device mode. 164 165 The number of programmable endpoints is different through 166 SOC revisions. 167 168 Say "y" to link the driver statically, or "m" to build a 169 dynamically linked module called "fsl_usb2_udc" and force 170 all gadget drivers to also be dynamically linked. 171 172config USB_FSL_USB2 173 tristate 174 depends on USB_GADGET_FSL_USB2 175 default USB_GADGET 176 select USB_GADGET_SELECTED 177 178config USB_GADGET_LH7A40X 179 boolean "LH7A40X" 180 depends on ARCH_LH7A40X 181 help 182 This driver provides USB Device Controller driver for LH7A40x 183 184config USB_LH7A40X 185 tristate 186 depends on USB_GADGET_LH7A40X 187 default USB_GADGET 188 select USB_GADGET_SELECTED 189 190config USB_GADGET_OMAP 191 boolean "OMAP USB Device Controller" 192 depends on ARCH_OMAP 193 select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3 || MACH_OMAP_H4_OTG 194 select USB_OTG_UTILS if ARCH_OMAP 195 help 196 Many Texas Instruments OMAP processors have flexible full 197 speed USB device controllers, with support for up to 30 198 endpoints (plus endpoint zero). This driver supports the 199 controller in the OMAP 1611, and should work with controllers 200 in other OMAP processors too, given minor tweaks. 201 202 Say "y" to link the driver statically, or "m" to build a 203 dynamically linked module called "omap_udc" and force all 204 gadget drivers to also be dynamically linked. 205 206config USB_OMAP 207 tristate 208 depends on USB_GADGET_OMAP 209 default USB_GADGET 210 select USB_GADGET_SELECTED 211 212config USB_OTG 213 boolean "OTG Support" 214 depends on USB_GADGET_OMAP && ARCH_OMAP_OTG && USB_OHCI_HCD 215 help 216 The most notable feature of USB OTG is support for a 217 "Dual-Role" device, which can act as either a device 218 or a host. The initial role choice can be changed 219 later, when two dual-role devices talk to each other. 220 221 Select this only if your OMAP board has a Mini-AB connector. 222 223config USB_GADGET_PXA25X 224 boolean "PXA 25x or IXP 4xx" 225 depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX 226 help 227 Intel's PXA 25x series XScale ARM-5TE processors include 228 an integrated full speed USB 1.1 device controller. The 229 controller in the IXP 4xx series is register-compatible. 230 231 It has fifteen fixed-function endpoints, as well as endpoint 232 zero (for control transfers). 233 234 Say "y" to link the driver statically, or "m" to build a 235 dynamically linked module called "pxa25x_udc" and force all 236 gadget drivers to also be dynamically linked. 237 238config USB_PXA25X 239 tristate 240 depends on USB_GADGET_PXA25X 241 default USB_GADGET 242 select USB_GADGET_SELECTED 243 244# if there's only one gadget driver, using only two bulk endpoints, 245# don't waste memory for the other endpoints 246config USB_PXA25X_SMALL 247 depends on USB_GADGET_PXA25X 248 bool 249 default n if USB_ETH_RNDIS 250 default y if USB_ZERO 251 default y if USB_ETH 252 default y if USB_G_SERIAL 253 254config USB_GADGET_PXA27X 255 boolean "PXA 27x" 256 depends on ARCH_PXA && (PXA27x || PXA3xx) 257 select USB_OTG_UTILS 258 help 259 Intel's PXA 27x series XScale ARM v5TE processors include 260 an integrated full speed USB 1.1 device controller. 261 262 It has up to 23 endpoints, as well as endpoint zero (for 263 control transfers). 264 265 Say "y" to link the driver statically, or "m" to build a 266 dynamically linked module called "pxa27x_udc" and force all 267 gadget drivers to also be dynamically linked. 268 269config USB_PXA27X 270 tristate 271 depends on USB_GADGET_PXA27X 272 default USB_GADGET 273 select USB_GADGET_SELECTED 274 275config USB_GADGET_S3C_HSOTG 276 boolean "S3C HS/OtG USB Device controller" 277 depends on S3C_DEV_USB_HSOTG 278 select USB_GADGET_S3C_HSOTG_PIO 279 help 280 The Samsung S3C64XX USB2.0 high-speed gadget controller 281 integrated into the S3C64XX series SoC. 282 283config USB_S3C_HSOTG 284 tristate 285 depends on USB_GADGET_S3C_HSOTG 286 default USB_GADGET 287 select USB_GADGET_SELECTED 288 289config USB_GADGET_S3C2410 290 boolean "S3C2410 USB Device Controller" 291 depends on ARCH_S3C2410 292 help 293 Samsung's S3C2410 is an ARM-4 processor with an integrated 294 full speed USB 1.1 device controller. It has 4 configurable 295 endpoints, as well as endpoint zero (for control transfers). 296 297 This driver has been tested on the S3C2410, S3C2412, and 298 S3C2440 processors. 299 300config USB_S3C2410 301 tristate 302 depends on USB_GADGET_S3C2410 303 default USB_GADGET 304 select USB_GADGET_SELECTED 305 306config USB_S3C2410_DEBUG 307 boolean "S3C2410 udc debug messages" 308 depends on USB_GADGET_S3C2410 309 310# 311# Controllers available in both integrated and discrete versions 312# 313 314# musb builds in ../musb along with host support 315config USB_GADGET_MUSB_HDRC 316 boolean "Inventra HDRC USB Peripheral (TI, ADI, ...)" 317 depends on USB_MUSB_HDRC && (USB_MUSB_PERIPHERAL || USB_MUSB_OTG) 318 select USB_GADGET_DUALSPEED 319 select USB_GADGET_SELECTED 320 help 321 This OTG-capable silicon IP is used in dual designs including 322 the TI DaVinci, OMAP 243x, OMAP 343x, TUSB 6010, and ADI Blackfin 323 324config USB_GADGET_IMX 325 boolean "Freescale IMX USB Peripheral Controller" 326 depends on ARCH_MX1 327 help 328 Freescale's IMX series include an integrated full speed 329 USB 1.1 device controller. The controller in the IMX series 330 is register-compatible. 331 332 It has Six fixed-function endpoints, as well as endpoint 333 zero (for control transfers). 334 335 Say "y" to link the driver statically, or "m" to build a 336 dynamically linked module called "imx_udc" and force all 337 gadget drivers to also be dynamically linked. 338 339config USB_IMX 340 tristate 341 depends on USB_GADGET_IMX 342 default USB_GADGET 343 select USB_GADGET_SELECTED 344 345config USB_GADGET_M66592 346 boolean "Renesas M66592 USB Peripheral Controller" 347 select USB_GADGET_DUALSPEED 348 help 349 M66592 is a discrete USB peripheral controller chip that 350 supports both full and high speed USB 2.0 data transfers. 351 It has seven configurable endpoints, and endpoint zero. 352 353 Say "y" to link the driver statically, or "m" to build a 354 dynamically linked module called "m66592_udc" and force all 355 gadget drivers to also be dynamically linked. 356 357config USB_M66592 358 tristate 359 depends on USB_GADGET_M66592 360 default USB_GADGET 361 select USB_GADGET_SELECTED 362 363config SUPERH_BUILT_IN_M66592 364 boolean "Enable SuperH built-in USB like the M66592" 365 depends on USB_GADGET_M66592 && CPU_SUBTYPE_SH7722 366 help 367 SH7722 has USB like the M66592. 368 369 The transfer rate is very slow when use "Ethernet Gadget". 370 However, this problem is improved if change a value of 371 NET_IP_ALIGN to 4. 372 373# 374# Controllers available only in discrete form (and all PCI controllers) 375# 376 377config USB_GADGET_AMD5536UDC 378 boolean "AMD5536 UDC" 379 depends on PCI 380 select USB_GADGET_DUALSPEED 381 help 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. 387 388 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. 391 392config USB_AMD5536UDC 393 tristate 394 depends on USB_GADGET_AMD5536UDC 395 default USB_GADGET 396 select USB_GADGET_SELECTED 397 398config USB_GADGET_FSL_QE 399 boolean "Freescale QE/CPM USB Device Controller" 400 depends on FSL_SOC && (QUICC_ENGINE || CPM) 401 help 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. 407 408 Set CONFIG_USB_GADGET to "m" to build this driver as a 409 dynamically linked module called "fsl_qe_udc". 410 411config USB_FSL_QE 412 tristate 413 depends on USB_GADGET_FSL_QE 414 default USB_GADGET 415 select USB_GADGET_SELECTED 416 417config USB_GADGET_CI13XXX 418 boolean "MIPS USB CI13xxx" 419 depends on PCI 420 select USB_GADGET_DUALSPEED 421 help 422 MIPS USB IP core family device controller 423 Currently it only supports IP part number CI13412 424 425 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. 428 429config USB_CI13XXX 430 tristate 431 depends on USB_GADGET_CI13XXX 432 default USB_GADGET 433 select USB_GADGET_SELECTED 434 435config USB_GADGET_NET2280 436 boolean "NetChip 228x" 437 depends on PCI 438 select USB_GADGET_DUALSPEED 439 help 440 NetChip 2280 / 2282 is a PCI based USB peripheral controller which 441 supports both full and high speed USB 2.0 data transfers. 442 443 It has six configurable endpoints, as well as endpoint zero 444 (for control transfers) and several endpoints with dedicated 445 functions. 446 447 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. 450 451config USB_NET2280 452 tristate 453 depends on USB_GADGET_NET2280 454 default USB_GADGET 455 select USB_GADGET_SELECTED 456 457config USB_GADGET_GOKU 458 boolean "Toshiba TC86C001 'Goku-S'" 459 depends on PCI 460 help 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). 463 464 The device controller has three configurable (bulk or interrupt) 465 endpoints, plus endpoint zero (for control transfers). 466 467 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. 470 471config USB_GOKU 472 tristate 473 depends on USB_GADGET_GOKU 474 default USB_GADGET 475 select USB_GADGET_SELECTED 476 477 478# 479# LAST -- dummy/emulated controller 480# 481 482config USB_GADGET_DUMMY_HCD 483 boolean "Dummy HCD (DEVELOPMENT)" 484 depends on USB=y || (USB=m && USB_GADGET=m) 485 select USB_GADGET_DUALSPEED 486 help 487 This host controller driver emulates USB, looping all data transfer 488 requests back to a USB "gadget driver" in the same host. The host 489 side is the master; the gadget side is the slave. Gadget drivers 490 can be high, full, or low speed; and they have access to endpoints 491 like those from NET2280, PXA2xx, or SA1100 hardware. 492 493 This may help in some stages of creating a driver to embed in a 494 Linux device, since it lets you debug several parts of the gadget 495 driver without its hardware or drivers being involved. 496 497 Since such a gadget side driver needs to interoperate with a host 498 side Linux-USB device driver, this may help to debug both sides 499 of a USB protocol stack. 500 501 Say "y" to link the driver statically, or "m" to build a 502 dynamically linked module called "dummy_hcd" and force all 503 gadget drivers to also be dynamically linked. 504 505config USB_DUMMY_HCD 506 tristate 507 depends on USB_GADGET_DUMMY_HCD 508 default USB_GADGET 509 select USB_GADGET_SELECTED 510 511# NOTE: Please keep dummy_hcd LAST so that "real hardware" appears 512# first and will be selected by default. 513 514endchoice 515 516config USB_GADGET_DUALSPEED 517 bool 518 depends on USB_GADGET 519 default n 520 help 521 Means that gadget drivers should include extra descriptors 522 and code to handle dual-speed controllers. 523 524# 525# USB Gadget Drivers 526# 527choice 528 tristate "USB Gadget Drivers" 529 depends on USB_GADGET && USB_GADGET_SELECTED 530 default USB_ETH 531 help 532 A Linux "Gadget Driver" talks to the USB Peripheral Controller 533 driver through the abstract "gadget" API. Some other operating 534 systems call these "client" drivers, of which "class drivers" 535 are a subset (implementing a USB device class specification). 536 A gadget driver implements one or more USB functions using 537 the peripheral hardware. 538 539 Gadget drivers are hardware-neutral, or "platform independent", 540 except that they sometimes must understand quirks or limitations 541 of the particular controllers they work with. For example, when 542 a controller doesn't support alternate configurations or provide 543 enough of the right types of endpoints, the gadget driver might 544 not be able work with that controller, or might need to implement 545 a less common variant of a device class protocol. 546 547# this first set of drivers all depend on bulk-capable hardware. 548 549config USB_ZERO 550 tristate "Gadget Zero (DEVELOPMENT)" 551 help 552 Gadget Zero is a two-configuration device. It either sinks and 553 sources bulk data; or it loops back a configurable number of 554 transfers. It also implements control requests, for "chapter 9" 555 conformance. The driver needs only two bulk-capable endpoints, so 556 it can work on top of most device-side usb controllers. It's 557 useful for testing, and is also a working example showing how 558 USB "gadget drivers" can be written. 559 560 Make this be the first driver you try using on top of any new 561 USB peripheral controller driver. Then you can use host-side 562 test software, like the "usbtest" driver, to put your hardware 563 and its driver through a basic set of functional tests. 564 565 Gadget Zero also works with the host-side "usb-skeleton" driver, 566 and with many kinds of host-side test software. You may need 567 to tweak product and vendor IDs before host software knows about 568 this device, and arrange to select an appropriate configuration. 569 570 Say "y" to link the driver statically, or "m" to build a 571 dynamically linked module called "g_zero". 572 573config USB_ZERO_HNPTEST 574 boolean "HNP Test Device" 575 depends on USB_ZERO && USB_OTG 576 help 577 You can configure this device to enumerate using the device 578 identifiers of the USB-OTG test device. That means that when 579 this gadget connects to another OTG device, with this one using 580 the "B-Peripheral" role, that device will use HNP to let this 581 one serve as the USB host instead (in the "B-Host" role). 582 583config USB_ETH 584 tristate "Ethernet Gadget (with CDC Ethernet support)" 585 depends on NET 586 help 587 This driver implements Ethernet style communication, in either 588 of two ways: 589 590 - The "Communication Device Class" (CDC) Ethernet Control Model. 591 That protocol is often avoided with pure Ethernet adapters, in 592 favor of simpler vendor-specific hardware, but is widely 593 supported by firmware for smart network devices. 594 595 - On hardware can't implement that protocol, a simple CDC subset 596 is used, placing fewer demands on USB. 597 598 RNDIS support is a third option, more demanding than that subset. 599 600 Within the USB device, this gadget driver exposes a network device 601 "usbX", where X depends on what other networking devices you have. 602 Treat it like a two-node Ethernet link: host, and gadget. 603 604 The Linux-USB host-side "usbnet" driver interoperates with this 605 driver, so that deep I/O queues can be supported. On 2.4 kernels, 606 use "CDCEther" instead, if you're using the CDC option. That CDC 607 mode should also interoperate with standard CDC Ethernet class 608 drivers on other host operating systems. 609 610 Say "y" to link the driver statically, or "m" to build a 611 dynamically linked module called "g_ether". 612 613config USB_ETH_RNDIS 614 bool "RNDIS support" 615 depends on USB_ETH 616 default y 617 help 618 Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol, 619 and Microsoft provides redistributable binary RNDIS drivers for 620 older versions of Windows. 621 622 If you say "y" here, the Ethernet gadget driver will try to provide 623 a second device configuration, supporting RNDIS to talk to such 624 Microsoft USB hosts. 625 626 To make MS-Windows work with this, use Documentation/usb/linux.inf 627 as the "driver info file". For versions of MS-Windows older than 628 XP, you'll need to download drivers from Microsoft's website; a URL 629 is given in comments found in that info file. 630 631config USB_GADGETFS 632 tristate "Gadget Filesystem (EXPERIMENTAL)" 633 depends on EXPERIMENTAL 634 help 635 This driver provides a filesystem based API that lets user mode 636 programs implement a single-configuration USB device, including 637 endpoint I/O and control requests that don't relate to enumeration. 638 All endpoints, transfer speeds, and transfer types supported by 639 the hardware are available, through read() and write() calls. 640 641 Currently, this option is still labelled as EXPERIMENTAL because 642 of existing race conditions in the underlying in-kernel AIO core. 643 644 Say "y" to link the driver statically, or "m" to build a 645 dynamically linked module called "gadgetfs". 646 647config USB_FILE_STORAGE 648 tristate "File-backed Storage Gadget" 649 depends on BLOCK 650 help 651 The File-backed Storage Gadget acts as a USB Mass Storage 652 disk drive. As its storage repository it can use a regular 653 file or a block device (in much the same way as the "loop" 654 device driver), specified as a module parameter. 655 656 Say "y" to link the driver statically, or "m" to build a 657 dynamically linked module called "g_file_storage". 658 659config USB_FILE_STORAGE_TEST 660 bool "File-backed Storage Gadget testing version" 661 depends on USB_FILE_STORAGE 662 default n 663 help 664 Say "y" to generate the larger testing version of the 665 File-backed Storage Gadget, useful for probing the 666 behavior of USB Mass Storage hosts. Not needed for 667 normal operation. 668 669config USB_G_SERIAL 670 tristate "Serial Gadget (with CDC ACM and CDC OBEX support)" 671 help 672 The Serial Gadget talks to the Linux-USB generic serial driver. 673 This driver supports a CDC-ACM module option, which can be used 674 to interoperate with MS-Windows hosts or with the Linux-USB 675 "cdc-acm" driver. 676 677 This driver also supports a CDC-OBEX option. You will need a 678 user space OBEX server talking to /dev/ttyGS*, since the kernel 679 itself doesn't implement the OBEX protocol. 680 681 Say "y" to link the driver statically, or "m" to build a 682 dynamically linked module called "g_serial". 683 684 For more information, see Documentation/usb/gadget_serial.txt 685 which includes instructions and a "driver info file" needed to 686 make MS-Windows work with CDC ACM. 687 688config USB_MIDI_GADGET 689 tristate "MIDI Gadget (EXPERIMENTAL)" 690 depends on SND && EXPERIMENTAL 691 select SND_RAWMIDI 692 help 693 The MIDI Gadget acts as a USB Audio device, with one MIDI 694 input and one MIDI output. These MIDI jacks appear as 695 a sound "card" in the ALSA sound system. Other MIDI 696 connections can then be made on the gadget system, using 697 ALSA's aconnect utility etc. 698 699 Say "y" to link the driver statically, or "m" to build a 700 dynamically linked module called "g_midi". 701 702config USB_G_PRINTER 703 tristate "Printer Gadget" 704 help 705 The Printer Gadget channels data between the USB host and a 706 userspace program driving the print engine. The user space 707 program reads and writes the device file /dev/g_printer to 708 receive or send printer data. It can use ioctl calls to 709 the device file to get or set printer status. 710 711 Say "y" to link the driver statically, or "m" to build a 712 dynamically linked module called "g_printer". 713 714 For more information, see Documentation/usb/gadget_printer.txt 715 which includes sample code for accessing the device file. 716 717config USB_CDC_COMPOSITE 718 tristate "CDC Composite Device (Ethernet and ACM)" 719 depends on NET 720 help 721 This driver provides two functions in one configuration: 722 a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link. 723 724 This driver requires four bulk and two interrupt endpoints, 725 plus the ability to handle altsettings. Not all peripheral 726 controllers are that capable. 727 728 Say "y" to link the driver statically, or "m" to build a 729 dynamically linked module. 730 731# put drivers that need isochronous transfer support (for audio 732# or video class gadget drivers), or specific hardware, here. 733 734# - none yet 735 736endchoice 737 738endif # USB_GADGET 739