[deliverable/linux.git] / drivers / usb / core / Kconfig

#
# USB Core configuration
#
config USB_DEBUG
	bool "USB verbose debug messages"
	depends on USB
	help
	  Say Y here if you want the USB core & hub drivers to produce a bunch
	  of debug messages to the system log. Select this if you are having a
	  problem with USB support and want to see more of what is going on.

config USB_ANNOUNCE_NEW_DEVICES
	bool "USB announce new devices"
	depends on USB
	default N
	help
	  Say Y here if you want the USB core to always announce the
	  idVendor, idProduct, Manufacturer, Product, and SerialNumber
	  strings for every new USB device to the syslog.  This option is
	  usually used by distro vendors to help with debugging and to
	  let users know what specific device was added to the machine
	  in what location.

	  If you do not want this kind of information sent to the system
	  log, or have any doubts about this, say N here.

comment "Miscellaneous USB options"
	depends on USB

config USB_DYNAMIC_MINORS
	bool "Dynamic USB minor allocation"
	depends on USB
	help
	  If you say Y here, the USB subsystem will use dynamic minor
	  allocation for any device that uses the USB major number.
	  This means that you can have more than 16 of a single type
	  of device (like USB printers).

	  If you are unsure about this, say N here.

config USB_SUSPEND
	bool "USB runtime power management (autosuspend) and wakeup"
	depends on USB && PM_RUNTIME
	help
	  If you say Y here, you can use driver calls or the sysfs
	  "power/control" file to enable or disable autosuspend for
	  individual USB peripherals (see
	  Documentation/usb/power-management.txt for more details).

	  Also, USB "remote wakeup" signaling is supported, whereby some
	  USB devices (like keyboards and network adapters) can wake up
	  their parent hub.  That wakeup cascades up the USB tree, and
	  could wake the system from states like suspend-to-RAM.

	  If you are unsure about this, say N here.

config USB_OTG
	bool "OTG support"
	depends on USB
	depends on USB_SUSPEND
	default n
	help
	  The most notable feature of USB OTG is support for a
	  "Dual-Role" device, which can act as either a device
	  or a host. The initial role is decided by the type of
	  plug inserted and can be changed later when two dual
	  role devices talk to each other.

	  Select this only if your board has Mini-AB/Micro-AB
	  connector.

config USB_OTG_WHITELIST
	bool "Rely on OTG Targeted Peripherals List"
	depends on USB_OTG || EXPERT
	default y if USB_OTG
	help
	  If you say Y here, the "otg_whitelist.h" file will be used as a
	  product whitelist, so USB peripherals not listed there will be
	  rejected during enumeration.  This behavior is required by the
	  USB OTG specification for all devices not on your product's
	  "Targeted Peripherals List".  "Embedded Hosts" are likewise
	  allowed to support only a limited number of peripherals.

	  Otherwise, peripherals not listed there will only generate a
	  warning and enumeration will continue.  That's more like what
	  normal Linux-USB hosts do (other than the warning), and is
	  convenient for many stages of product development.

config USB_OTG_BLACKLIST_HUB
	bool "Disable external hubs"
	depends on USB_OTG || EXPERT
	help
	  If you say Y here, then Linux will refuse to enumerate
	  external hubs.  OTG hosts are allowed to reduce hardware
	  and software costs by not supporting external hubs.  So
	  are "Embedded Hosts" that don't offer OTG support.
Commit	Line	Data
1da177e4 LT	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
f2a383e4 GKH	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
1da177e4 LT	27	comment "Miscellaneous USB options"
	28	depends on USB
	29
1da177e4	30	config USB_DYNAMIC_MINORS
b6719996 RD	31	bool "Dynamic USB minor allocation"
b6719996 RD	32	depends on USB
1da177e4 LT	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
2dab3948	42	bool "USB runtime power management (autosuspend) and wakeup"
9bbdf1e0	43	depends on USB && PM_RUNTIME
1da177e4 LT	44	help
1da177e4 LT	45	If you say Y here, you can use driver calls or the sysfs
2dab3948 AS	46	"power/control" file to enable or disable autosuspend for
2dab3948 AS	47	individual USB peripherals (see
c2c8d1fd	48	Documentation/usb/power-management.txt for more details).
f3f3253d DB	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.
1da177e4 LT	54
	55	If you are unsure about this, say N here.
	56
1da177e4	57	config USB_OTG
f4ce9084	58	bool "OTG support"
eb83be98	59	depends on USB
6d602610	60	depends on USB_SUSPEND
1da177e4	61	default n
f4ce9084 PK	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.
1da177e4 LT	71
	72	config USB_OTG_WHITELIST
	73	bool "Rely on OTG Targeted Peripherals List"
6a108a14	74	depends on USB_OTG \|\| EXPERT
22552b28	75	default y if USB_OTG
1da177e4 LT	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
22552b28 RG	81	"Targeted Peripherals List". "Embedded Hosts" are likewise
22552b28 RG	82	allowed to support only a limited number of peripherals.
1da177e4 LT	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
89ccbdc9 DB	89	config USB_OTG_BLACKLIST_HUB
89ccbdc9 DB	90	bool "Disable external hubs"
6a108a14	91	depends on USB_OTG \|\| EXPERT
89ccbdc9 DB	92	help
	93	If you say Y here, then Linux will refuse to enumerate
	94	external hubs. OTG hosts are allowed to reduce hardware
22552b28	95	and software costs by not supporting external hubs. So
bc45df95	96	are "Embedded Hosts" that don't offer OTG support.
1da177e4	97