diff options
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/usb/gadget_serial.txt | 4 | ||||
-rw-r--r-- | Documentation/usb/proc_usb_info.txt | 6 | ||||
-rw-r--r-- | Documentation/usb/usbmon.txt | 12 |
3 files changed, 13 insertions, 9 deletions
diff --git a/Documentation/usb/gadget_serial.txt b/Documentation/usb/gadget_serial.txt index 9b22bd14c348..eac7df94d8e3 100644 --- a/Documentation/usb/gadget_serial.txt +++ b/Documentation/usb/gadget_serial.txt | |||
@@ -114,11 +114,11 @@ modules. | |||
114 | Then you must load the gadget serial driver. To load it as an | 114 | Then you must load the gadget serial driver. To load it as an |
115 | ACM device (recommended for interoperability), do this: | 115 | ACM device (recommended for interoperability), do this: |
116 | 116 | ||
117 | modprobe g_serial use_acm=1 | 117 | modprobe g_serial |
118 | 118 | ||
119 | To load it as a vendor specific bulk in/out device, do this: | 119 | To load it as a vendor specific bulk in/out device, do this: |
120 | 120 | ||
121 | modprobe g_serial | 121 | modprobe g_serial use_acm=0 |
122 | 122 | ||
123 | This will also automatically load the underlying gadget peripheral | 123 | This will also automatically load the underlying gadget peripheral |
124 | controller driver. This must be done each time you reboot the gadget | 124 | controller driver. This must be done each time you reboot the gadget |
diff --git a/Documentation/usb/proc_usb_info.txt b/Documentation/usb/proc_usb_info.txt index 077e9032d0cd..fafcd4723260 100644 --- a/Documentation/usb/proc_usb_info.txt +++ b/Documentation/usb/proc_usb_info.txt | |||
@@ -49,8 +49,10 @@ it and 002/048 sometime later. | |||
49 | 49 | ||
50 | These files can be read as binary data. The binary data consists | 50 | These files can be read as binary data. The binary data consists |
51 | of first the device descriptor, then the descriptors for each | 51 | of first the device descriptor, then the descriptors for each |
52 | configuration of the device. That information is also shown in | 52 | configuration of the device. Multi-byte fields in the device and |
53 | text form by the /proc/bus/usb/devices file, described later. | 53 | configuration descriptors, but not other descriptors, are converted |
54 | to host endianness by the kernel. This information is also shown | ||
55 | in text form by the /proc/bus/usb/devices file, described later. | ||
54 | 56 | ||
55 | These files may also be used to write user-level drivers for the USB | 57 | These files may also be used to write user-level drivers for the USB |
56 | devices. You would open the /proc/bus/usb/BBB/DDD file read/write, | 58 | devices. You would open the /proc/bus/usb/BBB/DDD file read/write, |
diff --git a/Documentation/usb/usbmon.txt b/Documentation/usb/usbmon.txt index 2917ce4ffdc4..270481906dc8 100644 --- a/Documentation/usb/usbmon.txt +++ b/Documentation/usb/usbmon.txt | |||
@@ -34,11 +34,12 @@ if usbmon is built into the kernel. | |||
34 | Verify that bus sockets are present. | 34 | Verify that bus sockets are present. |
35 | 35 | ||
36 | # ls /sys/kernel/debug/usbmon | 36 | # ls /sys/kernel/debug/usbmon |
37 | 0s 0t 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u | 37 | 0s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u |
38 | # | 38 | # |
39 | 39 | ||
40 | Now you can choose to either use the sockets numbered '0' (to capture packets on | 40 | Now you can choose to either use the socket '0u' (to capture packets on all |
41 | all buses), and skip to step #3, or find the bus used by your device with step #2. | 41 | buses), and skip to step #3, or find the bus used by your device with step #2. |
42 | This allows to filter away annoying devices that talk continuously. | ||
42 | 43 | ||
43 | 2. Find which bus connects to the desired device | 44 | 2. Find which bus connects to the desired device |
44 | 45 | ||
@@ -99,8 +100,9 @@ on the event type, but there is a set of words, common for all types. | |||
99 | 100 | ||
100 | Here is the list of words, from left to right: | 101 | Here is the list of words, from left to right: |
101 | 102 | ||
102 | - URB Tag. This is used to identify URBs is normally a kernel mode address | 103 | - URB Tag. This is used to identify URBs, and is normally an in-kernel address |
103 | of the URB structure in hexadecimal. | 104 | of the URB structure in hexadecimal, but can be a sequence number or any |
105 | other unique string, within reason. | ||
104 | 106 | ||
105 | - Timestamp in microseconds, a decimal number. The timestamp's resolution | 107 | - Timestamp in microseconds, a decimal number. The timestamp's resolution |
106 | depends on available clock, and so it can be much worse than a microsecond | 108 | depends on available clock, and so it can be much worse than a microsecond |