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-rw-r--r--Documentation/usb/gadget_serial.txt4
-rw-r--r--Documentation/usb/proc_usb_info.txt6
-rw-r--r--Documentation/usb/usbmon.txt12
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.
114Then you must load the gadget serial driver. To load it as an 114Then you must load the gadget serial driver. To load it as an
115ACM device (recommended for interoperability), do this: 115ACM device (recommended for interoperability), do this:
116 116
117 modprobe g_serial use_acm=1 117 modprobe g_serial
118 118
119To load it as a vendor specific bulk in/out device, do this: 119To 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
123This will also automatically load the underlying gadget peripheral 123This will also automatically load the underlying gadget peripheral
124controller driver. This must be done each time you reboot the gadget 124controller 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
50These files can be read as binary data. The binary data consists 50These files can be read as binary data. The binary data consists
51of first the device descriptor, then the descriptors for each 51of first the device descriptor, then the descriptors for each
52configuration of the device. That information is also shown in 52configuration of the device. Multi-byte fields in the device and
53text form by the /proc/bus/usb/devices file, described later. 53configuration descriptors, but not other descriptors, are converted
54to host endianness by the kernel. This information is also shown
55in text form by the /proc/bus/usb/devices file, described later.
54 56
55These files may also be used to write user-level drivers for the USB 57These files may also be used to write user-level drivers for the USB
56devices. You would open the /proc/bus/usb/BBB/DDD file read/write, 58devices. 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.
34Verify that bus sockets are present. 34Verify that bus sockets are present.
35 35
36# ls /sys/kernel/debug/usbmon 36# ls /sys/kernel/debug/usbmon
370s 0t 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u 370s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u
38# 38#
39 39
40Now you can choose to either use the sockets numbered '0' (to capture packets on 40Now you can choose to either use the socket '0u' (to capture packets on all
41all buses), and skip to step #3, or find the bus used by your device with step #2. 41buses), and skip to step #3, or find the bus used by your device with step #2.
42This allows to filter away annoying devices that talk continuously.
42 43
432. Find which bus connects to the desired device 442. 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
100Here is the list of words, from left to right: 101Here 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