drivers/usb/core/Kconfig

   1 #
   2 # USB Core configuration
   3 #
   4 config 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
  12 config 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
  27 comment "Miscellaneous USB options"
  28         depends on USB
  29
  30 config 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
  41 config USB_SUSPEND
  42         bool "USB runtime power management (autosuspend) and wakeup"
  43         depends on USB && PM_RUNTIME
  44         help
  45           If you say Y here, you can use driver calls or the sysfs
  46           "power/control" file to enable or disable autosuspend for
  47           individual USB peripherals (see
  48           Documentation/usb/power-management.txt for more details).
  49
  50           Also, USB "remote wakeup" signaling is supported, whereby some
  51           USB devices (like keyboards and network adapters) can wake up
  52           their parent hub.  That wakeup cascades up the USB tree, and
  53           could wake the system from states like suspend-to-RAM.
  54
  55           If you are unsure about this, say N here.
  56
  57 config USB_OTG
  58         bool "OTG support"
  59         depends on USB
  60         depends on USB_SUSPEND
  61         default n
  62         help
  63           The most notable feature of USB OTG is support for a
  64           "Dual-Role" device, which can act as either a device
  65           or a host. The initial role is decided by the type of
  66           plug inserted and can be changed later when two dual
  67           role devices talk to each other.
  68
  69           Select this only if your board has Mini-AB/Micro-AB
  70           connector.
  71
  72 config USB_OTG_WHITELIST
  73         bool "Rely on OTG Targeted Peripherals List"
  74         depends on USB_OTG || EXPERT
  75         default y if USB_OTG
  76         help
  77           If you say Y here, the "otg_whitelist.h" file will be used as a
  78           product whitelist, so USB peripherals not listed there will be
  79           rejected during enumeration.  This behavior is required by the
  80           USB OTG specification for all devices not on your product's
  81           "Targeted Peripherals List".  "Embedded Hosts" are likewise
  82           allowed to support only a limited number of peripherals.
  83
  84           Otherwise, peripherals not listed there will only generate a
  85           warning and enumeration will continue.  That's more like what
  86           normal Linux-USB hosts do (other than the warning), and is
  87           convenient for many stages of product development.
  88
  89 config USB_OTG_BLACKLIST_HUB
  90         bool "Disable external hubs"
  91         depends on USB_OTG || EXPERT
  92         help
  93           If you say Y here, then Linux will refuse to enumerate
  94           external hubs.  OTG hosts are allowed to reduce hardware
  95           and software costs by not supporting external hubs.  So
  96           are "Embedded Hosts" that don't offer OTG support.
  97