1# 2# USB Core configuration 3# 4config USB_DEBUG 5 bool "USB verbose debug messages" 6 depends on USB 7 help 8 Say Y here if you want the USB core & hub drivers to produce a bunch 9 of debug messages to the system log. Select this if you are having a 10 problem with USB support and want to see more of what is going on. 11 12config USB_ANNOUNCE_NEW_DEVICES 13 bool "USB announce new devices" 14 depends on USB 15 default N 16 help 17 Say Y here if you want the USB core to always announce the 18 idVendor, idProduct, Manufacturer, Product, and SerialNumber 19 strings for every new USB device to the syslog. This option is 20 usually used by distro vendors to help with debugging and to 21 let users know what specific device was added to the machine 22 in what location. 23 24 If you do not want this kind of information sent to the system 25 log, or have any doubts about this, say N here. 26 27comment "Miscellaneous USB options" 28 depends on USB 29 30config USB_DYNAMIC_MINORS 31 bool "Dynamic USB minor allocation" 32 depends on USB 33 help 34 If you say Y here, the USB subsystem will use dynamic minor 35 allocation for any device that uses the USB major number. 36 This means that you can have more than 16 of a single type 37 of device (like USB printers). 38 39 If you are unsure about this, say N here. 40 41config USB_OTG 42 bool "OTG support" 43 depends on USB 44 depends on USB_SUSPEND 45 default n 46 help 47 The most notable feature of USB OTG is support for a 48 "Dual-Role" device, which can act as either a device 49 or a host. The initial role is decided by the type of 50 plug inserted and can be changed later when two dual 51 role devices talk to each other. 52 53 Select this only if your board has Mini-AB/Micro-AB 54 connector. 55 56config USB_OTG_WHITELIST 57 bool "Rely on OTG Targeted Peripherals List" 58 depends on USB_OTG || EXPERT 59 default y if USB_OTG 60 help 61 If you say Y here, the "otg_whitelist.h" file will be used as a 62 product whitelist, so USB peripherals not listed there will be 63 rejected during enumeration. This behavior is required by the 64 USB OTG specification for all devices not on your product's 65 "Targeted Peripherals List". "Embedded Hosts" are likewise 66 allowed to support only a limited number of peripherals. 67 68 Otherwise, peripherals not listed there will only generate a 69 warning and enumeration will continue. That's more like what 70 normal Linux-USB hosts do (other than the warning), and is 71 convenient for many stages of product development. 72 73config USB_OTG_BLACKLIST_HUB 74 bool "Disable external hubs" 75 depends on USB_OTG || EXPERT 76 help 77 If you say Y here, then Linux will refuse to enumerate 78 external hubs. OTG hosts are allowed to reduce hardware 79 and software costs by not supporting external hubs. So 80 are "Embedded Hosts" that don't offer OTG support. 81 82