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https://github.com/AsahiLinux/u-boot
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019808f97c
With sandbox we want to be able to emulate USB devices so that we can test the USB stack. Add a uclass to support this. It implements the same operations as a normal USB device driver, but in this case passes them on to an emulation driver. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
62 lines
2.3 KiB
Text
62 lines
2.3 KiB
Text
config USB_ARCH_HAS_HCD
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def_bool y
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config USB
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bool "Support for Host-side USB"
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depends on USB_ARCH_HAS_HCD
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---help---
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Universal Serial Bus (USB) is a specification for a serial bus
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subsystem which offers higher speeds and more features than the
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traditional PC serial port. The bus supplies power to peripherals
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and allows for hot swapping. Up to 127 USB peripherals can be
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connected to a single USB host in a tree structure.
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The USB host is the root of the tree, the peripherals are the
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leaves and the inner nodes are special USB devices called hubs.
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Most PCs now have USB host ports, used to connect peripherals
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such as scanners, keyboards, mice, modems, cameras, disks,
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flash memory, network links, and printers to the PC.
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Say Y here if your computer has a host-side USB port and you want
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to use USB devices. You then need to say Y to at least one of the
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Host Controller Driver (HCD) options below. Choose a USB 1.1
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controller, such as "UHCI HCD support" or "OHCI HCD support",
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and "EHCI HCD (USB 2.0) support" except for older systems that
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do not have USB 2.0 support. It doesn't normally hurt to select
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them all if you are not certain.
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If your system has a device-side USB port, used in the peripheral
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side of the USB protocol, see the "USB Gadget" framework instead.
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After choosing your HCD, then select drivers for the USB peripherals
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you'll be using. You may want to check out the information provided
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in <file:Documentation/usb/> and especially the links given in
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<file:Documentation/usb/usb-help.txt>.
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if USB
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config DM_USB
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bool "Enable driver model for USB"
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depends on USB && DM
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help
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Enable driver model for USB. The USB interface is then implemented
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by the USB uclass. Multiple USB controllers of different types
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(XHCI, EHCI) can be attached and used. The 'usb' command works as
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normal. OCHI is not supported at present.
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Much of the code is shared but with this option enabled the USB
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uclass takes care of device enumeration. USB devices can be
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declared with the USB_DEVICE() macro and will be automatically
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probed when found on the bus.
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source "drivers/usb/host/Kconfig"
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source "drivers/usb/emul/Kconfig"
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config USB_STORAGE
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bool "USB Mass Storage support"
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---help---
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Say Y here if you want to connect USB mass storage devices to your
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board's USB port.
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endif
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