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1da177e4 LT |
1 | # |
2 | # USB Core configuration | |
3 | # | |
f2a383e4 GKH |
4 | config USB_ANNOUNCE_NEW_DEVICES |
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 |
20 | bool "Enable USB persist by default" | |
4f482038 JW |
21 | default y |
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" |
98f541c6 | 46 | depends on PM_RUNTIME |
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 | |
58 | config USB_OTG_WHITELIST | |
59 | bool "Rely on OTG Targeted Peripherals List" | |
6a108a14 | 60 | depends on USB_OTG || EXPERT |
22552b28 | 61 | default y if USB_OTG |
1da177e4 LT |
62 | help |
63 | If you say Y here, the "otg_whitelist.h" file will be used as a | |
64 | product whitelist, so USB peripherals not listed there will be | |
65 | rejected during enumeration. This behavior is required by the | |
66 | USB OTG specification for all devices not on your product's | |
22552b28 RG |
67 | "Targeted Peripherals List". "Embedded Hosts" are likewise |
68 | allowed to support only a limited number of peripherals. | |
1da177e4 LT |
69 | |
70 | Otherwise, peripherals not listed there will only generate a | |
71 | warning and enumeration will continue. That's more like what | |
72 | normal Linux-USB hosts do (other than the warning), and is | |
73 | convenient for many stages of product development. | |
74 | ||
89ccbdc9 DB |
75 | config USB_OTG_BLACKLIST_HUB |
76 | bool "Disable external hubs" | |
6a108a14 | 77 | depends on USB_OTG || EXPERT |
89ccbdc9 DB |
78 | help |
79 | If you say Y here, then Linux will refuse to enumerate | |
80 | external hubs. OTG hosts are allowed to reduce hardware | |
22552b28 | 81 | and software costs by not supporting external hubs. So |
bc45df95 | 82 | are "Embedded Hosts" that don't offer OTG support. |
1da177e4 | 83 | |
1dfa91aa PC |
84 | config USB_OTG_FSM |
85 | tristate "USB 2.0 OTG FSM implementation" | |
86 | depends on USB | |
87 | select USB_OTG | |
88 | select USB_PHY | |
89 | help | |
90 | Implements OTG Finite State Machine as specified in On-The-Go | |
91 | and Embedded Host Supplement to the USB Revision 2.0 Specification. | |
92 |