diff options
Diffstat (limited to 'Documentation/usb')
-rw-r--r-- | Documentation/usb/proc_usb_info.txt | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/Documentation/usb/proc_usb_info.txt b/Documentation/usb/proc_usb_info.txt index 729c72d34c89..f86550fe38ee 100644 --- a/Documentation/usb/proc_usb_info.txt +++ b/Documentation/usb/proc_usb_info.txt | |||
@@ -20,7 +20,7 @@ the /proc/bus/usb/BBB/DDD files. | |||
20 | 20 | ||
21 | to /etc/fstab. This will mount usbfs at each reboot. | 21 | to /etc/fstab. This will mount usbfs at each reboot. |
22 | You can then issue `cat /proc/bus/usb/devices` to extract | 22 | You can then issue `cat /proc/bus/usb/devices` to extract |
23 | USB device information, and user mode drivers can use usbfs | 23 | USB device information, and user mode drivers can use usbfs |
24 | to interact with USB devices. | 24 | to interact with USB devices. |
25 | 25 | ||
26 | There are a number of mount options supported by usbfs. | 26 | There are a number of mount options supported by usbfs. |
@@ -32,7 +32,7 @@ the /proc/bus/usb/BBB/DDD files. | |||
32 | still see references to the older "usbdevfs" name. | 32 | still see references to the older "usbdevfs" name. |
33 | 33 | ||
34 | For more information on mounting the usbfs file system, see the | 34 | For more information on mounting the usbfs file system, see the |
35 | "USB Device Filesystem" section of the USB Guide. The latest copy | 35 | "USB Device Filesystem" section of the USB Guide. The latest copy |
36 | of the USB Guide can be found at http://www.linux-usb.org/ | 36 | of the USB Guide can be found at http://www.linux-usb.org/ |
37 | 37 | ||
38 | 38 | ||
@@ -133,7 +133,7 @@ B: Alloc=ddd/ddd us (xx%), #Int=ddd, #Iso=ddd | |||
133 | are the only transfers that reserve bandwidth. Control and bulk | 133 | are the only transfers that reserve bandwidth. Control and bulk |
134 | transfers use all other bandwidth, including reserved bandwidth that | 134 | transfers use all other bandwidth, including reserved bandwidth that |
135 | is not used for transfers (such as for short packets). | 135 | is not used for transfers (such as for short packets). |
136 | 136 | ||
137 | The percentage is how much of the "reserved" bandwidth is scheduled by | 137 | The percentage is how much of the "reserved" bandwidth is scheduled by |
138 | those transfers. For a low or full speed bus (loosely, "USB 1.1"), | 138 | those transfers. For a low or full speed bus (loosely, "USB 1.1"), |
139 | 90% of the bus bandwidth is reserved. For a high speed bus (loosely, | 139 | 90% of the bus bandwidth is reserved. For a high speed bus (loosely, |
@@ -197,7 +197,7 @@ C:* #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA | |||
197 | | | |__NumberOfInterfaces | 197 | | | |__NumberOfInterfaces |
198 | | |__ "*" indicates the active configuration (others are " ") | 198 | | |__ "*" indicates the active configuration (others are " ") |
199 | |__Config info tag | 199 | |__Config info tag |
200 | 200 | ||
201 | USB devices may have multiple configurations, each of which act | 201 | USB devices may have multiple configurations, each of which act |
202 | rather differently. For example, a bus-powered configuration | 202 | rather differently. For example, a bus-powered configuration |
203 | might be much less capable than one that is self-powered. Only | 203 | might be much less capable than one that is self-powered. Only |
@@ -228,7 +228,7 @@ I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss | |||
228 | For example, default settings may not use more than a small | 228 | For example, default settings may not use more than a small |
229 | amount of periodic bandwidth. To use significant fractions | 229 | amount of periodic bandwidth. To use significant fractions |
230 | of bus bandwidth, drivers must select a non-default altsetting. | 230 | of bus bandwidth, drivers must select a non-default altsetting. |
231 | 231 | ||
232 | Only one setting for an interface may be active at a time, and | 232 | Only one setting for an interface may be active at a time, and |
233 | only one driver may bind to an interface at a time. Most devices | 233 | only one driver may bind to an interface at a time. Most devices |
234 | have only one alternate setting per interface. | 234 | have only one alternate setting per interface. |
@@ -297,18 +297,21 @@ S: SerialNumber=dce0 | |||
297 | C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA | 297 | C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA |
298 | I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub | 298 | I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub |
299 | E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms | 299 | E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms |
300 | |||
300 | T: Bus=00 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 4 | 301 | T: Bus=00 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 4 |
301 | D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 | 302 | D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 |
302 | P: Vendor=0451 ProdID=1446 Rev= 1.00 | 303 | P: Vendor=0451 ProdID=1446 Rev= 1.00 |
303 | C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA | 304 | C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA |
304 | I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub | 305 | I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub |
305 | E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms | 306 | E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms |
307 | |||
306 | T: Bus=00 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=1.5 MxCh= 0 | 308 | T: Bus=00 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=1.5 MxCh= 0 |
307 | D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 | 309 | D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 |
308 | P: Vendor=04b4 ProdID=0001 Rev= 0.00 | 310 | P: Vendor=04b4 ProdID=0001 Rev= 0.00 |
309 | C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA | 311 | C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA |
310 | I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=mouse | 312 | I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=mouse |
311 | E: Ad=81(I) Atr=03(Int.) MxPS= 3 Ivl= 10ms | 313 | E: Ad=81(I) Atr=03(Int.) MxPS= 3 Ivl= 10ms |
314 | |||
312 | T: Bus=00 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#= 4 Spd=12 MxCh= 0 | 315 | T: Bus=00 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#= 4 Spd=12 MxCh= 0 |
313 | D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 | 316 | D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 |
314 | P: Vendor=0565 ProdID=0001 Rev= 1.08 | 317 | P: Vendor=0565 ProdID=0001 Rev= 1.08 |