2005-04-17 06:20:36 +08:00
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#
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# USB Gadget support on a system involves
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# (a) a peripheral controller, and
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# (b) the gadget driver using it.
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#
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# NOTE: Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !!
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#
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# - Host systems (like PCs) need CONFIG_USB (with "A" jacks).
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# - Peripherals (like PDAs) need CONFIG_USB_GADGET (with "B" jacks).
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2006-10-04 04:36:44 +08:00
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# - Some systems have both kinds of controllers.
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2005-04-17 06:20:36 +08:00
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#
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# With help from a special transceiver and a "Mini-AB" jack, systems with
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# both kinds of controller can also support "USB On-the-Go" (CONFIG_USB_OTG).
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#
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2008-01-24 16:36:31 +08:00
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menuconfig USB_GADGET
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tristate "USB Gadget Support"
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2011-11-18 05:42:24 +08:00
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select NLS
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2005-04-17 06:20:36 +08:00
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help
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USB is a master/slave protocol, organized with one master
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host (such as a PC) controlling up to 127 peripheral devices.
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The USB hardware is asymmetric, which makes it easier to set up:
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you can't connect a "to-the-host" connector to a peripheral.
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Linux can run in the host, or in the peripheral. In both cases
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you need a low level bus controller driver, and some software
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talking to it. Peripheral controllers are often discrete silicon,
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or are integrated with the CPU in a microcontroller. The more
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2006-08-23 04:40:15 +08:00
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familiar host side controllers have names like "EHCI", "OHCI",
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2005-04-17 06:20:36 +08:00
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or "UHCI", and are usually integrated into southbridges on PC
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motherboards.
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Enable this configuration option if you want to run Linux inside
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a USB peripheral device. Configure one hardware driver for your
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peripheral/device side bus controller, and a "gadget driver" for
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your peripheral protocol. (If you use modular gadget drivers,
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you may configure more than one.)
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If in doubt, say "N" and don't enable these drivers; most people
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don't have this kind of hardware (except maybe inside Linux PDAs).
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For more information, see <http://www.linux-usb.org/gadget> and
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the kernel DocBook documentation for this API.
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2008-01-24 16:36:31 +08:00
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if USB_GADGET
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2007-07-02 08:35:28 +08:00
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config USB_GADGET_DEBUG
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2008-03-11 03:09:51 +08:00
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boolean "Debugging messages (DEVELOPMENT)"
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2008-09-13 00:39:06 +08:00
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depends on DEBUG_KERNEL
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2007-07-02 08:35:28 +08:00
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help
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Many controller and gadget drivers will print some debugging
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messages if you use this option to ask for those messages.
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Avoid enabling these messages, even if you're actively
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debugging such a driver. Many drivers will emit so many
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2013-10-11 14:07:00 +08:00
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messages that the driver timings are affected, which will
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either create new failure modes or remove the one you're
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trying to track down. Never enable these messages for a
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production build.
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config USB_GADGET_VERBOSE
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bool "Verbose debugging Messages (DEVELOPMENT)"
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depends on USB_GADGET_DEBUG
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help
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Many controller and gadget drivers will print verbose debugging
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messages if you use this option to ask for those messages.
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Avoid enabling these messages, even if you're actively
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debugging such a driver. Many drivers will emit so many
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2007-07-02 08:35:28 +08:00
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messages that the driver timings are affected, which will
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either create new failure modes or remove the one you're
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trying to track down. Never enable these messages for a
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production build.
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2005-04-17 06:20:36 +08:00
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config USB_GADGET_DEBUG_FILES
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2008-03-11 03:09:51 +08:00
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boolean "Debugging information files (DEVELOPMENT)"
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2008-09-13 00:39:06 +08:00
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depends on PROC_FS
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2005-04-17 06:20:36 +08:00
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help
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Some of the drivers in the "gadget" framework can expose
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debugging information in files such as /proc/driver/udc
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(for a peripheral controller). The information in these
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files may help when you're troubleshooting or bringing up a
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driver on a new board. Enable these files by choosing "Y"
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here. If in doubt, or to conserve kernel memory, say "N".
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2007-10-10 17:29:43 +08:00
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config USB_GADGET_DEBUG_FS
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2008-03-11 03:09:51 +08:00
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boolean "Debugging information files in debugfs (DEVELOPMENT)"
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2008-09-13 00:39:06 +08:00
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depends on DEBUG_FS
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2007-10-10 17:29:43 +08:00
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help
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Some of the drivers in the "gadget" framework can expose
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debugging information in files under /sys/kernel/debug/.
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The information in these files may help when you're
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troubleshooting or bringing up a driver on a new board.
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Enable these files by choosing "Y" here. If in doubt, or
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to conserve kernel memory, say "N".
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2008-09-13 00:39:06 +08:00
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config USB_GADGET_VBUS_DRAW
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int "Maximum VBUS Power usage (2-500 mA)"
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range 2 500
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default 2
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help
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Some devices need to draw power from USB when they are
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configured, perhaps to operate circuitry or to recharge
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batteries. This is in addition to any local power supply,
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such as an AC adapter or batteries.
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Enter the maximum power your device draws through USB, in
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milliAmperes. The permitted range of values is 2 - 500 mA;
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0 mA would be legal, but can make some hosts misbehave.
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This value will be used except for system-specific gadget
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drivers that have more specific information.
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usb: gadget: storage: make FSG_NUM_BUFFERS variable size
FSG_NUM_BUFFERS is set to 2 as default.
Usually 2 buffers are enough to establish a good buffering pipeline.
The number may be increased in order to compensate a for bursty VFS
behaviour.
Here follows a description of system that may require more than
2 buffers.
* CPU ondemand governor active
* latency cost for wake up and/or frequency change
* DMA for IO
Use case description.
* Data transfer from MMC via VFS to USB.
* DMA shuffles data from MMC and to USB.
* The CPU wakes up every now and then to pass data in and out from VFS,
which cause the bursty VFS behaviour.
Test set up
* Running dd on the host reading from the mass storage device
* cmdline: dd if=/dev/sdb of=/dev/null bs=4k count=$((256*100))
* Caches are dropped on the host and on the device before each run
Measurements on a Snowball board with ondemand_governor active.
FSG_NUM_BUFFERS 2
104857600 bytes (105 MB) copied, 5.62173 s, 18.7 MB/s
104857600 bytes (105 MB) copied, 5.61811 s, 18.7 MB/s
104857600 bytes (105 MB) copied, 5.57817 s, 18.8 MB/s
FSG_NUM_BUFFERS 4
104857600 bytes (105 MB) copied, 5.26839 s, 19.9 MB/s
104857600 bytes (105 MB) copied, 5.2691 s, 19.9 MB/s
104857600 bytes (105 MB) copied, 5.2711 s, 19.9 MB/s
There may not be one optimal number for all boards. This is why
the number is added to Kconfig. If selecting USB_GADGET_DEBUG_FILES
this value may be set by a module parameter as well.
Signed-off-by: Per Forlin <per.forlin@linaro.org>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-08-20 03:21:27 +08:00
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config USB_GADGET_STORAGE_NUM_BUFFERS
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int "Number of storage pipeline buffers"
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range 2 4
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default 2
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help
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Usually 2 buffers are enough to establish a good buffering
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pipeline. The number may be increased in order to compensate
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for a bursty VFS behaviour. For instance there may be CPU wake up
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latencies that makes the VFS to appear bursty in a system with
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an CPU on-demand governor. Especially if DMA is doing IO to
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offload the CPU. In this case the CPU will go into power
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save often and spin up occasionally to move data within VFS.
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If selecting USB_GADGET_DEBUG_FILES this value may be set by
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a module parameter as well.
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If unsure, say 2.
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2014-07-15 19:09:45 +08:00
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source "drivers/usb/gadget/udc/Kconfig"
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2005-04-17 06:20:36 +08:00
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#
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# USB Gadget Drivers
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#
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2012-09-07 02:11:09 +08:00
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# composite based drivers
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config USB_LIBCOMPOSITE
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tristate
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2012-12-24 04:10:24 +08:00
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select CONFIGFS_FS
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2012-09-07 02:11:09 +08:00
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depends on USB_GADGET
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2012-12-24 04:10:07 +08:00
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config USB_F_ACM
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tristate
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2012-12-24 04:10:01 +08:00
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config USB_F_SS_LB
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tristate
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2012-12-24 04:10:04 +08:00
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config USB_U_SERIAL
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tristate
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usb: gadget: u_ether: convert into module
u_ether.c has been #include'd by all gadgets which implement
USB Ethernet functions. In order to add configfs support,
the f_ecm.c, f_eem.c, f_ncm.c, f_subset.c, f_rndis.c need to be
converted into modules and must not be #include'd. Consequently,
the u_ether.c needs to be a module too, in a manner similar
to u_serial.c. The resulting module should not take any parameters,
so they are pushed to the current users of it, that is ether.c,
g_ffs.c, multi.c, ncm.c, nokia.c.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-05-23 15:22:03 +08:00
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config USB_U_ETHER
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tristate
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2013-03-18 16:52:57 +08:00
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config USB_F_SERIAL
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2012-12-24 04:10:04 +08:00
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tristate
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2013-03-21 22:33:42 +08:00
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config USB_F_OBEX
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tristate
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2013-05-23 15:22:06 +08:00
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config USB_F_NCM
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tristate
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2013-05-23 16:32:03 +08:00
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config USB_F_ECM
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tristate
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2013-05-23 16:51:11 +08:00
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config USB_F_PHONET
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tristate
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2013-05-28 15:15:47 +08:00
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config USB_F_EEM
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tristate
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2013-05-28 15:15:53 +08:00
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config USB_F_SUBSET
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tristate
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2013-05-28 15:15:57 +08:00
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config USB_F_RNDIS
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tristate
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2013-10-09 16:06:01 +08:00
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config USB_F_MASS_STORAGE
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tristate
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2013-12-03 22:15:33 +08:00
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config USB_F_FS
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tristate
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2014-07-23 01:58:38 +08:00
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config USB_F_UAC1
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tristate
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2014-07-23 01:58:30 +08:00
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config USB_F_UAC2
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tristate
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2014-09-09 07:02:10 +08:00
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config USB_F_UVC
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tristate
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2005-04-17 06:20:36 +08:00
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choice
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tristate "USB Gadget Drivers"
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default USB_ETH
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help
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A Linux "Gadget Driver" talks to the USB Peripheral Controller
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driver through the abstract "gadget" API. Some other operating
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systems call these "client" drivers, of which "class drivers"
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are a subset (implementing a USB device class specification).
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A gadget driver implements one or more USB functions using
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the peripheral hardware.
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Gadget drivers are hardware-neutral, or "platform independent",
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except that they sometimes must understand quirks or limitations
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of the particular controllers they work with. For example, when
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a controller doesn't support alternate configurations or provide
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enough of the right types of endpoints, the gadget driver might
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not be able work with that controller, or might need to implement
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a less common variant of a device class protocol.
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# this first set of drivers all depend on bulk-capable hardware.
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2013-06-13 16:37:24 +08:00
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config USB_CONFIGFS
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tristate "USB functions configurable through configfs"
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select USB_LIBCOMPOSITE
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help
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A Linux USB "gadget" can be set up through configfs.
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If this is the case, the USB functions (which from the host's
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perspective are seen as interfaces) and configurations are
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specified simply by creating appropriate directories in configfs.
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Associating functions with configurations is done by creating
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appropriate symbolic links.
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2013-08-18 18:51:43 +08:00
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For more information see Documentation/usb/gadget_configfs.txt.
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2013-06-13 16:37:24 +08:00
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config USB_CONFIGFS_SERIAL
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boolean "Generic serial bulk in/out"
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depends on USB_CONFIGFS
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depends on TTY
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select USB_U_SERIAL
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select USB_F_SERIAL
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help
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The function talks to the Linux-USB generic serial driver.
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config USB_CONFIGFS_ACM
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boolean "Abstract Control Model (CDC ACM)"
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depends on USB_CONFIGFS
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depends on TTY
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select USB_U_SERIAL
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select USB_F_ACM
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help
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ACM serial link. This function can be used to interoperate with
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MS-Windows hosts or with the Linux-USB "cdc-acm" driver.
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config USB_CONFIGFS_OBEX
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boolean "Object Exchange Model (CDC OBEX)"
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depends on USB_CONFIGFS
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depends on TTY
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select USB_U_SERIAL
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select USB_F_OBEX
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help
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You will need a user space OBEX server talking to /dev/ttyGS*,
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since the kernel itself doesn't implement the OBEX protocol.
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config USB_CONFIGFS_NCM
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boolean "Network Control Model (CDC NCM)"
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depends on USB_CONFIGFS
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depends on NET
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select USB_U_ETHER
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select USB_F_NCM
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help
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|
NCM is an advanced protocol for Ethernet encapsulation, allows
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grouping of several ethernet frames into one USB transfer and
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different alignment possibilities.
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config USB_CONFIGFS_ECM
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boolean "Ethernet Control Model (CDC ECM)"
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depends on USB_CONFIGFS
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depends on NET
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select USB_U_ETHER
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select USB_F_ECM
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help
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|
|
The "Communication Device Class" (CDC) Ethernet Control Model.
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|
That protocol is often avoided with pure Ethernet adapters, in
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favor of simpler vendor-specific hardware, but is widely
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supported by firmware for smart network devices.
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2013-05-28 15:15:56 +08:00
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config USB_CONFIGFS_ECM_SUBSET
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boolean "Ethernet Control Model (CDC ECM) subset"
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depends on USB_CONFIGFS
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depends on NET
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select USB_U_ETHER
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select USB_F_SUBSET
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|
|
help
|
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|
On hardware that can't implement the full protocol,
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a simple CDC subset is used, placing fewer demands on USB.
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2013-05-28 15:16:01 +08:00
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config USB_CONFIGFS_RNDIS
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bool "RNDIS"
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depends on USB_CONFIGFS
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|
|
depends on NET
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|
|
select USB_U_ETHER
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|
|
select USB_F_RNDIS
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|
help
|
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|
Microsoft Windows XP bundles the "Remote NDIS" (RNDIS) protocol,
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and Microsoft provides redistributable binary RNDIS drivers for
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|
older versions of Windows.
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|
|
To make MS-Windows work with this, use Documentation/usb/linux.inf
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|
|
|
|
as the "driver info file". For versions of MS-Windows older than
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|
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|
|
XP, you'll need to download drivers from Microsoft's website; a URL
|
|
|
|
|
is given in comments found in that info file.
|
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|
|
2013-05-28 15:15:51 +08:00
|
|
|
config USB_CONFIGFS_EEM
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|
|
bool "Ethernet Emulation Model (EEM)"
|
|
|
|
|
depends on USB_CONFIGFS
|
|
|
|
|
depends on NET
|
|
|
|
|
select USB_U_ETHER
|
|
|
|
|
select USB_F_EEM
|
|
|
|
|
help
|
|
|
|
|
CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
|
|
|
|
|
and therefore can be supported by more hardware. Technically ECM and
|
|
|
|
|
EEM are designed for different applications. The ECM model extends
|
|
|
|
|
the network interface to the target (e.g. a USB cable modem), and the
|
|
|
|
|
EEM model is for mobile devices to communicate with hosts using
|
|
|
|
|
ethernet over USB. For Linux gadgets, however, the interface with
|
|
|
|
|
the host is the same (a usbX device), so the differences are minimal.
|
|
|
|
|
|
2013-05-23 16:51:15 +08:00
|
|
|
config USB_CONFIGFS_PHONET
|
|
|
|
|
boolean "Phonet protocol"
|
|
|
|
|
depends on USB_CONFIGFS
|
|
|
|
|
depends on NET
|
|
|
|
|
depends on PHONET
|
|
|
|
|
select USB_U_ETHER
|
|
|
|
|
select USB_F_PHONET
|
|
|
|
|
help
|
|
|
|
|
The Phonet protocol implementation for USB device.
|
|
|
|
|
|
2013-10-09 16:06:05 +08:00
|
|
|
config USB_CONFIGFS_MASS_STORAGE
|
|
|
|
|
boolean "Mass storage"
|
|
|
|
|
depends on USB_CONFIGFS
|
2013-11-04 20:46:17 +08:00
|
|
|
depends on BLOCK
|
2013-10-09 16:06:05 +08:00
|
|
|
select USB_F_MASS_STORAGE
|
|
|
|
|
help
|
|
|
|
|
The Mass Storage Gadget acts as a USB Mass Storage disk drive.
|
|
|
|
|
As its storage repository it can use a regular file or a block
|
|
|
|
|
device (in much the same way as the "loop" device driver),
|
|
|
|
|
specified as a module parameter or sysfs option.
|
|
|
|
|
|
2013-11-07 15:41:28 +08:00
|
|
|
config USB_CONFIGFS_F_LB_SS
|
|
|
|
|
boolean "Loopback and sourcesink function (for testing)"
|
2013-11-07 15:41:27 +08:00
|
|
|
depends on USB_CONFIGFS
|
|
|
|
|
select USB_F_SS_LB
|
|
|
|
|
help
|
2013-11-07 15:41:28 +08:00
|
|
|
Loopback function loops back a configurable number of transfers.
|
|
|
|
|
Sourcesink function either sinks and sources bulk data.
|
2013-11-07 15:41:27 +08:00
|
|
|
It also implements control requests, for "chapter 9" conformance.
|
|
|
|
|
Make this be the first driver you try using on top of any new
|
|
|
|
|
USB peripheral controller driver. Then you can use host-side
|
|
|
|
|
test software, like the "usbtest" driver, to put your hardware
|
|
|
|
|
and its driver through a basic set of functional tests.
|
|
|
|
|
|
2013-12-03 22:15:36 +08:00
|
|
|
config USB_CONFIGFS_F_FS
|
|
|
|
|
boolean "Function filesystem (FunctionFS)"
|
|
|
|
|
depends on USB_CONFIGFS
|
|
|
|
|
select USB_F_FS
|
|
|
|
|
help
|
|
|
|
|
The Function Filesystem (FunctionFS) lets one create USB
|
|
|
|
|
composite functions in user space in the same way GadgetFS
|
|
|
|
|
lets one create USB gadgets in user space. This allows creation
|
|
|
|
|
of composite gadgets such that some of the functions are
|
|
|
|
|
implemented in kernel space (for instance Ethernet, serial or
|
|
|
|
|
mass storage) and other are implemented in user space.
|
|
|
|
|
|
2014-07-15 19:09:44 +08:00
|
|
|
source "drivers/usb/gadget/legacy/Kconfig"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
endchoice
|
|
|
|
|
|
2008-01-24 16:36:31 +08:00
|
|
|
endif # USB_GADGET
|