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

#
# USB Core configuration
#
config USB_ANNOUNCE_NEW_DEVICES
	bool "USB announce new devices"
	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"

config USB_DEFAULT_PERSIST
	bool "Enable USB persist by default"
	default y
	help
	  Say N here if you don't want USB power session persistence
	  enabled by default.  If you say N it will make suspended USB
	  devices that lose power get reenumerated as if they had been
	  unplugged, causing any mounted filesystems to be lost.  The
	  persist feature can still be enabled for individual devices
	  through the power/persist sysfs node. See
	  Documentation/usb/persist.txt for more info.

	  If you have any questions about this, say Y here, only say N
	  if you know exactly what you are doing.

config USB_DYNAMIC_MINORS
	bool "Dynamic USB minor allocation"
	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_OTG
	bool "OTG support"
	depends on PM
	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 and EH Targeted Peripherals List"
	depends on USB
	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 and EH 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.

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.

config USB_OTG_FSM
	tristate "USB 2.0 OTG FSM implementation"
	depends on USB && USB_OTG
	select USB_PHY
	help
	  Implements OTG Finite State Machine as specified in On-The-Go
	  and Embedded Host Supplement to the USB Revision 2.0 Specification.
Commit	Line	Data
1da177e4 LT	1	#
	2	# USB Core configuration
	3	#
f2a383e4 GKH	4	config USB_ANNOUNCE_NEW_DEVICES
f2a383e4 GKH	5	bool "USB announce new devices"
f2a383e4 GKH	6	help
	7	Say Y here if you want the USB core to always announce the
	8	idVendor, idProduct, Manufacturer, Product, and SerialNumber
	9	strings for every new USB device to the syslog. This option is
	10	usually used by distro vendors to help with debugging and to
	11	let users know what specific device was added to the machine
	12	in what location.
	13
	14	If you do not want this kind of information sent to the system
	15	log, or have any doubts about this, say N here.
	16
1da177e4	17	comment "Miscellaneous USB options"
1da177e4	18
4f482038 JW	19	config USB_DEFAULT_PERSIST
4f482038 JW	20	bool "Enable USB persist by default"
4f482038 JW	21	default y
4f482038 JW	22	help
8c88126b	23	Say N here if you don't want USB power session persistence
4f482038 JW	24	enabled by default. If you say N it will make suspended USB
	25	devices that lose power get reenumerated as if they had been
	26	unplugged, causing any mounted filesystems to be lost. The
	27	persist feature can still be enabled for individual devices
	28	through the power/persist sysfs node. See
	29	Documentation/usb/persist.txt for more info.
	30
	31	If you have any questions about this, say Y here, only say N
	32	if you know exactly what you are doing.
	33
1da177e4	34	config USB_DYNAMIC_MINORS
b6719996	35	bool "Dynamic USB minor allocation"
1da177e4 LT	36	help
	37	If you say Y here, the USB subsystem will use dynamic minor
	38	allocation for any device that uses the USB major number.
	39	This means that you can have more than 16 of a single type
	40	of device (like USB printers).
	41
	42	If you are unsure about this, say N here.
	43
1da177e4	44	config USB_OTG
f4ce9084	45	bool "OTG support"
1b3e3aa6	46	depends on PM
1da177e4	47	default n
f4ce9084 PK	48	help
	49	The most notable feature of USB OTG is support for a
	50	"Dual-Role" device, which can act as either a device
	51	or a host. The initial role is decided by the type of
	52	plug inserted and can be changed later when two dual
	53	role devices talk to each other.
	54
	55	Select this only if your board has Mini-AB/Micro-AB
	56	connector.
1da177e4 LT	57
1da177e4 LT	58	config USB_OTG_WHITELIST
9bd0181c PC	59	bool "Rely on OTG and EH Targeted Peripherals List"
9bd0181c PC	60	depends on USB
1da177e4 LT	61	help
	62	If you say Y here, the "otg_whitelist.h" file will be used as a
	63	product whitelist, so USB peripherals not listed there will be
	64	rejected during enumeration. This behavior is required by the
9bd0181c	65	USB OTG and EH specification for all devices not on your product's
22552b28 RG	66	"Targeted Peripherals List". "Embedded Hosts" are likewise
22552b28 RG	67	allowed to support only a limited number of peripherals.
1da177e4	68
89ccbdc9 DB	69	config USB_OTG_BLACKLIST_HUB
89ccbdc9 DB	70	bool "Disable external hubs"
6a108a14	71	depends on USB_OTG \|\| EXPERT
89ccbdc9 DB	72	help
	73	If you say Y here, then Linux will refuse to enumerate
	74	external hubs. OTG hosts are allowed to reduce hardware
22552b28	75	and software costs by not supporting external hubs. So
bc45df95	76	are "Embedded Hosts" that don't offer OTG support.
1da177e4	77
1dfa91aa PC	78	config USB_OTG_FSM
1dfa91aa PC	79	tristate "USB 2.0 OTG FSM implementation"
c4f16130	80	depends on USB && USB_OTG
1dfa91aa PC	81	select USB_PHY
	82	help
	83	Implements OTG Finite State Machine as specified in On-The-Go
	84	and Embedded Host Supplement to the USB Revision 2.0 Specification.