1menuconfig USB 2 bool "USB support" 3 ---help--- 4 Universal Serial Bus (USB) is a specification for a serial bus 5 subsystem which offers higher speeds and more features than the 6 traditional PC serial port. The bus supplies power to peripherals 7 and allows for hot swapping. Up to 127 USB peripherals can be 8 connected to a single USB host in a tree structure. 9 10 The USB host is the root of the tree, the peripherals are the 11 leaves and the inner nodes are special USB devices called hubs. 12 Most PCs now have USB host ports, used to connect peripherals 13 such as scanners, keyboards, mice, modems, cameras, disks, 14 flash memory, network links, and printers to the PC. 15 16 Say Y here if your device has an USB port, either host, peripheral or 17 dual-role. 18 19 For an USB host port, you then need to say Y to at least one of the 20 Host Controller Driver (HCD) options below. Choose a USB 1.1 21 controller, such as "UHCI HCD support" or "OHCI HCD support", 22 and "EHCI HCD (USB 2.0) support" except for older systems that 23 do not have USB 2.0 support. It doesn't normally hurt to select 24 them all if you are not certain. 25 26 If your system has a device-side USB port, used in the peripheral 27 side of the USB protocol, see the "USB Gadget" framework instead. 28 29 After choosing your HCD, then select drivers for the USB peripherals 30 you'll be using. You may want to check out the information provided 31 in <file:Documentation/usb/> and especially the links given in 32 <file:Documentation/usb/usb-help.txt>. 33 34if USB 35 36config DM_USB 37 bool "Enable driver model for USB" 38 depends on USB && DM 39 help 40 Enable driver model for USB. The USB interface is then implemented 41 by the USB uclass. Multiple USB controllers of different types 42 (XHCI, EHCI) can be attached and used. The 'usb' command works as 43 normal. OCHI is not supported at present. 44 45 Much of the code is shared but with this option enabled the USB 46 uclass takes care of device enumeration. USB devices can be 47 declared with the U_BOOT_USB_DEVICE() macro and will be 48 automatically probed when found on the bus. 49 50source "drivers/usb/host/Kconfig" 51 52source "drivers/usb/dwc3/Kconfig" 53 54source "drivers/usb/musb-new/Kconfig" 55 56source "drivers/usb/emul/Kconfig" 57 58source "drivers/usb/ulpi/Kconfig" 59 60comment "USB peripherals" 61 62config USB_STORAGE 63 bool "USB Mass Storage support" 64 ---help--- 65 Say Y here if you want to connect USB mass storage devices to your 66 board's USB port. 67 68config USB_KEYBOARD 69 bool "USB Keyboard support" 70 ---help--- 71 Say Y here if you want to use a USB keyboard for U-Boot command line 72 input. 73 74if USB_KEYBOARD 75 76choice 77 prompt "USB keyboard polling" 78 optional 79 ---help--- 80 Enable a polling mechanism for USB keyboard. 81 82 config SYS_USB_EVENT_POLL 83 bool "Interrupt polling" 84 85 config SYS_USB_EVENT_POLL_VIA_INT_QUEUE 86 bool "Poll via interrupt queue" 87 88 config SYS_USB_EVENT_POLL_VIA_CONTROL_EP 89 bool "Poll via control EP" 90 91endchoice 92 93endif 94 95source "drivers/usb/gadget/Kconfig" 96 97endif 98