[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / core / Kconfig

#
# USB Core configuration
#
config USB_DEBUG
	bool "USB verbose debug messages"
	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"
	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"

config USB_DEFAULT_PERSIST
	bool "Enable USB persist by default"
	default y
	help
	  Say N here if you don't want USB power session persistance
	  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_RUNTIME
	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"
1da177e4 LT	6	help
	7	Say Y here if you want the USB core & hub drivers to produce a bunch
	8	of debug messages to the system log. Select this if you are having a
	9	problem with USB support and want to see more of what is going on.
	10
f2a383e4 GKH	11	config USB_ANNOUNCE_NEW_DEVICES
f2a383e4 GKH	12	bool "USB announce new devices"
f2a383e4 GKH	13	default N
	14	help
	15	Say Y here if you want the USB core to always announce the
	16	idVendor, idProduct, Manufacturer, Product, and SerialNumber
	17	strings for every new USB device to the syslog. This option is
	18	usually used by distro vendors to help with debugging and to
	19	let users know what specific device was added to the machine
	20	in what location.
	21
	22	If you do not want this kind of information sent to the system
	23	log, or have any doubts about this, say N here.
	24
1da177e4	25	comment "Miscellaneous USB options"
1da177e4	26
4f482038 JW	27	config USB_DEFAULT_PERSIST
4f482038 JW	28	bool "Enable USB persist by default"
4f482038 JW	29	default y
	30	help
	31	Say N here if you don't want USB power session persistance
	32	enabled by default. If you say N it will make suspended USB
	33	devices that lose power get reenumerated as if they had been
	34	unplugged, causing any mounted filesystems to be lost. The
	35	persist feature can still be enabled for individual devices
	36	through the power/persist sysfs node. See
	37	Documentation/usb/persist.txt for more info.
	38
	39	If you have any questions about this, say Y here, only say N
	40	if you know exactly what you are doing.
	41
1da177e4	42	config USB_DYNAMIC_MINORS
b6719996	43	bool "Dynamic USB minor allocation"
1da177e4 LT	44	help
	45	If you say Y here, the USB subsystem will use dynamic minor
	46	allocation for any device that uses the USB major number.
	47	This means that you can have more than 16 of a single type
	48	of device (like USB printers).
	49
	50	If you are unsure about this, say N here.
	51
1da177e4	52	config USB_OTG
f4ce9084	53	bool "OTG support"
98f541c6	54	depends on PM_RUNTIME
1da177e4	55	default n
f4ce9084 PK	56	help
	57	The most notable feature of USB OTG is support for a
	58	"Dual-Role" device, which can act as either a device
	59	or a host. The initial role is decided by the type of
	60	plug inserted and can be changed later when two dual
	61	role devices talk to each other.
	62
	63	Select this only if your board has Mini-AB/Micro-AB
	64	connector.
1da177e4 LT	65
	66	config USB_OTG_WHITELIST
	67	bool "Rely on OTG Targeted Peripherals List"
6a108a14	68	depends on USB_OTG \|\| EXPERT
22552b28	69	default y if USB_OTG
1da177e4 LT	70	help
	71	If you say Y here, the "otg_whitelist.h" file will be used as a
	72	product whitelist, so USB peripherals not listed there will be
	73	rejected during enumeration. This behavior is required by the
	74	USB OTG specification for all devices not on your product's
22552b28 RG	75	"Targeted Peripherals List". "Embedded Hosts" are likewise
22552b28 RG	76	allowed to support only a limited number of peripherals.
1da177e4 LT	77
	78	Otherwise, peripherals not listed there will only generate a
	79	warning and enumeration will continue. That's more like what
	80	normal Linux-USB hosts do (other than the warning), and is
	81	convenient for many stages of product development.
	82
89ccbdc9 DB	83	config USB_OTG_BLACKLIST_HUB
89ccbdc9 DB	84	bool "Disable external hubs"
6a108a14	85	depends on USB_OTG \|\| EXPERT
89ccbdc9 DB	86	help
	87	If you say Y here, then Linux will refuse to enumerate
	88	external hubs. OTG hosts are allowed to reduce hardware
22552b28	89	and software costs by not supporting external hubs. So
bc45df95	90	are "Embedded Hosts" that don't offer OTG support.
1da177e4	91