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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 |
12 | bool "USB announce new devices" | |
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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 |
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" |
6d602610 | 54 | depends on USB_SUSPEND |
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. | |
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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 |
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 |
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 |