1config USB_ARCH_HAS_HCD 2 def_bool y 3 4config USB 5 bool "Support for Host-side USB" 6 depends on USB_ARCH_HAS_HCD 7 ---help--- 8 Universal Serial Bus (USB) is a specification for a serial bus 9 subsystem which offers higher speeds and more features than the 10 traditional PC serial port. The bus supplies power to peripherals 11 and allows for hot swapping. Up to 127 USB peripherals can be 12 connected to a single USB host in a tree structure. 13 14 The USB host is the root of the tree, the peripherals are the 15 leaves and the inner nodes are special USB devices called hubs. 16 Most PCs now have USB host ports, used to connect peripherals 17 such as scanners, keyboards, mice, modems, cameras, disks, 18 flash memory, network links, and printers to the PC. 19 20 Say Y here if your computer has a host-side USB port and you want 21 to use USB devices. You then need to say Y to at least one of the 22 Host Controller Driver (HCD) options below. Choose a USB 1.1 23 controller, such as "UHCI HCD support" or "OHCI HCD support", 24 and "EHCI HCD (USB 2.0) support" except for older systems that 25 do not have USB 2.0 support. It doesn't normally hurt to select 26 them all if you are not certain. 27 28 If your system has a device-side USB port, used in the peripheral 29 side of the USB protocol, see the "USB Gadget" framework instead. 30 31 After choosing your HCD, then select drivers for the USB peripherals 32 you'll be using. You may want to check out the information provided 33 in <file:Documentation/usb/> and especially the links given in 34 <file:Documentation/usb/usb-help.txt>. 35 36if USB 37 38config DM_USB 39 bool "Enable driver model for USB" 40 depends on USB && DM 41 help 42 Enable driver model for USB. The USB interface is then implemented 43 by the USB uclass. Multiple USB controllers of different types 44 (XHCI, EHCI) can be attached and used. The 'usb' command works as 45 normal. OCHI is not supported at present. 46 47 Much of the code is shared but with this option enabled the USB 48 uclass takes care of device enumeration. USB devices can be 49 declared with the USB_DEVICE() macro and will be automatically 50 probed when found on the bus. 51 52source "drivers/usb/host/Kconfig" 53 54source "drivers/usb/emul/Kconfig" 55 56config USB_STORAGE 57 bool "USB Mass Storage support" 58 ---help--- 59 Say Y here if you want to connect USB mass storage devices to your 60 board's USB port. 61 62endif 63