mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 07:25:01 +07:00
9dbe416b65
This reverts commit7a9618a22a. Romain Izard recently reported that commit7a9618a22aended up allowing every legacy gadget driver to statically linked to the kernel, however that doesn't work, since only one legacy gadget can be bound to a controller. Because of that, let's revert the original commit and fix the problem. Reported-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
516 lines
16 KiB
Plaintext
516 lines
16 KiB
Plaintext
#
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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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# - Some systems have both kinds of controllers.
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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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menuconfig USB_GADGET
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tristate "USB Gadget Support"
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select USB_COMMON
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select NLS
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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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familiar host side controllers have names like "EHCI", "OHCI",
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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 documentation for this API.
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if USB_GADGET
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config USB_GADGET_DEBUG
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bool "Debugging messages (DEVELOPMENT)"
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depends on DEBUG_KERNEL
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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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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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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_DEBUG_FILES
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bool "Debugging information files (DEVELOPMENT)"
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depends on PROC_FS
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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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config USB_GADGET_DEBUG_FS
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bool "Debugging information files in debugfs (DEVELOPMENT)"
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depends on DEBUG_FS
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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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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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config USB_GADGET_STORAGE_NUM_BUFFERS
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int "Number of storage pipeline buffers"
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range 2 256
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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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config U_SERIAL_CONSOLE
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bool "Serial gadget console support"
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depends on USB_U_SERIAL
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help
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It supports the serial gadget can be used as a console.
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source "drivers/usb/gadget/udc/Kconfig"
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#
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# USB Gadget Drivers
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#
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# composite based drivers
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config USB_LIBCOMPOSITE
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tristate
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select CONFIGFS_FS
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depends on USB_GADGET
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config USB_F_ACM
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tristate
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config USB_F_SS_LB
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tristate
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config USB_U_SERIAL
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tristate
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config USB_U_ETHER
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tristate
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config USB_U_AUDIO
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tristate
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config USB_F_SERIAL
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tristate
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config USB_F_OBEX
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tristate
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config USB_F_NCM
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tristate
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config USB_F_ECM
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tristate
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config USB_F_PHONET
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tristate
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config USB_F_EEM
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tristate
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config USB_F_SUBSET
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tristate
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config USB_F_RNDIS
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tristate
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config USB_F_MASS_STORAGE
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tristate
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config USB_F_FS
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tristate
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config USB_F_UAC1
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tristate
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config USB_F_UAC1_LEGACY
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tristate
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config USB_F_UAC2
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tristate
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config USB_F_UVC
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tristate
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config USB_F_MIDI
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tristate
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config USB_F_HID
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tristate
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config USB_F_PRINTER
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tristate
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config USB_F_TCM
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tristate
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# this first set of drivers all depend on bulk-capable hardware.
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config USB_CONFIGFS
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tristate "USB Gadget 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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For more information see Documentation/usb/gadget_configfs.txt.
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config USB_CONFIGFS_SERIAL
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bool "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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bool "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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bool "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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bool "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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bool "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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config USB_CONFIGFS_ECM_SUBSET
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bool "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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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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XP, you'll need to download drivers from Microsoft's website; a URL
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is given in comments found in that info file.
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config USB_CONFIGFS_EEM
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bool "Ethernet Emulation Model (EEM)"
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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_EEM
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help
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CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM
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and therefore can be supported by more hardware. Technically ECM and
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EEM are designed for different applications. The ECM model extends
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the network interface to the target (e.g. a USB cable modem), and the
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EEM model is for mobile devices to communicate with hosts using
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ethernet over USB. For Linux gadgets, however, the interface with
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the host is the same (a usbX device), so the differences are minimal.
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config USB_CONFIGFS_PHONET
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bool "Phonet protocol"
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depends on USB_CONFIGFS
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depends on NET
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depends on PHONET
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select USB_U_ETHER
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select USB_F_PHONET
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help
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The Phonet protocol implementation for USB device.
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config USB_CONFIGFS_MASS_STORAGE
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bool "Mass storage"
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depends on USB_CONFIGFS
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depends on BLOCK
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select USB_F_MASS_STORAGE
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help
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The Mass Storage Gadget acts as a USB Mass Storage disk drive.
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As its storage repository it can use a regular file or a block
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device (in much the same way as the "loop" device driver),
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specified as a module parameter or sysfs option.
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config USB_CONFIGFS_F_LB_SS
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bool "Loopback and sourcesink function (for testing)"
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depends on USB_CONFIGFS
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select USB_F_SS_LB
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help
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Loopback function loops back a configurable number of transfers.
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Sourcesink function either sinks and sources bulk data.
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It also implements control requests, for "chapter 9" conformance.
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Make this be the first driver you try using on top of any new
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USB peripheral controller driver. Then you can use host-side
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test software, like the "usbtest" driver, to put your hardware
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and its driver through a basic set of functional tests.
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config USB_CONFIGFS_F_FS
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bool "Function filesystem (FunctionFS)"
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depends on USB_CONFIGFS
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select USB_F_FS
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help
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The Function Filesystem (FunctionFS) lets one create USB
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composite functions in user space in the same way GadgetFS
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lets one create USB gadgets in user space. This allows creation
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of composite gadgets such that some of the functions are
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implemented in kernel space (for instance Ethernet, serial or
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mass storage) and other are implemented in user space.
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config USB_CONFIGFS_F_UAC1
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bool "Audio Class 1.0"
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depends on USB_CONFIGFS
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depends on SND
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select USB_LIBCOMPOSITE
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select SND_PCM
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select USB_U_AUDIO
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select USB_F_UAC1
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help
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This Audio function implements 1 AudioControl interface,
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1 AudioStreaming Interface each for USB-OUT and USB-IN.
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This driver doesn't expect any real Audio codec to be present
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on the device - the audio streams are simply sinked to and
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sourced from a virtual ALSA sound card created. The user-space
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application may choose to do whatever it wants with the data
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received from the USB Host and choose to provide whatever it
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wants as audio data to the USB Host.
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config USB_CONFIGFS_F_UAC1_LEGACY
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bool "Audio Class 1.0 (legacy implementation)"
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depends on USB_CONFIGFS
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depends on SND
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select USB_LIBCOMPOSITE
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select SND_PCM
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select USB_F_UAC1_LEGACY
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help
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This Audio function implements 1 AudioControl interface,
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1 AudioStreaming Interface each for USB-OUT and USB-IN.
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This is a legacy driver and requires a real Audio codec
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to be present on the device.
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config USB_CONFIGFS_F_UAC2
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bool "Audio Class 2.0"
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depends on USB_CONFIGFS
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depends on SND
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select USB_LIBCOMPOSITE
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select SND_PCM
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select USB_U_AUDIO
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select USB_F_UAC2
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help
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This Audio function is compatible with USB Audio Class
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specification 2.0. It implements 1 AudioControl interface,
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1 AudioStreaming Interface each for USB-OUT and USB-IN.
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This driver doesn't expect any real Audio codec to be present
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on the device - the audio streams are simply sinked to and
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sourced from a virtual ALSA sound card created. The user-space
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application may choose to do whatever it wants with the data
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received from the USB Host and choose to provide whatever it
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wants as audio data to the USB Host.
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config USB_CONFIGFS_F_MIDI
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bool "MIDI function"
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depends on USB_CONFIGFS
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depends on SND
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select USB_LIBCOMPOSITE
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select SND_RAWMIDI
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select USB_F_MIDI
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help
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The MIDI Function acts as a USB Audio device, with one MIDI
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input and one MIDI output. These MIDI jacks appear as
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a sound "card" in the ALSA sound system. Other MIDI
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connections can then be made on the gadget system, using
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ALSA's aconnect utility etc.
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config USB_CONFIGFS_F_HID
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bool "HID function"
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depends on USB_CONFIGFS
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select USB_F_HID
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help
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The HID function driver provides generic emulation of USB
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Human Interface Devices (HID).
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For more information, see Documentation/usb/gadget_hid.txt.
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config USB_CONFIGFS_F_UVC
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bool "USB Webcam function"
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depends on USB_CONFIGFS
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depends on VIDEO_V4L2
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depends on VIDEO_DEV
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select VIDEOBUF2_VMALLOC
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select USB_F_UVC
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help
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The Webcam function acts as a composite USB Audio and Video Class
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device. It provides a userspace API to process UVC control requests
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and stream video data to the host.
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config USB_CONFIGFS_F_PRINTER
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bool "Printer function"
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select USB_F_PRINTER
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depends on USB_CONFIGFS
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help
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The Printer function channels data between the USB host and a
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userspace program driving the print engine. The user space
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program reads and writes the device file /dev/g_printer<X> to
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receive or send printer data. It can use ioctl calls to
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the device file to get or set printer status.
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For more information, see Documentation/usb/gadget_printer.txt
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which includes sample code for accessing the device file.
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config USB_CONFIGFS_F_TCM
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bool "USB Gadget Target Fabric"
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depends on TARGET_CORE
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depends on USB_CONFIGFS
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select USB_LIBCOMPOSITE
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select USB_F_TCM
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help
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This fabric is a USB gadget component. Two USB protocols are
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supported that is BBB or BOT (Bulk Only Transport) and UAS
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(USB Attached SCSI). BOT is advertised on alternative
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interface 0 (primary) and UAS is on alternative interface 1.
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Both protocols can work on USB2.0 and USB3.0.
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UAS utilizes the USB 3.0 feature called streams support.
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choice
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tristate "USB Gadget precomposed configurations"
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default USB_ETH
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optional
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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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The available choices each represent a single precomposed USB
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gadget configuration. In the device model, each option contains
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both the device instantiation as a child for a USB gadget
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controller, and the relevant drivers for each function declared
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by the device.
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source "drivers/usb/gadget/legacy/Kconfig"
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endchoice
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endif # USB_GADGET
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