On Sun, 26 Oct 2003 20:46:41 -0700 [EMAIL PROTECTED] wrote:
| I dont understand (all) the levels of device numbering for USB devices
| in /sysfs.
There are a bunch of numbers there, eh?
I gave it a shot, using my own /sys/bus/usb/devices tree.
(Yes, it's usually mounted on /sys.)
So see if this helps you out any and if you can relate it to
your USB device tree.
I also have [oue]hci-hcd loaded, with controllers for each of them.
I probably won't answer all of your questions here, but I'm willing
to update this based on more info and feedback/corrections.
| What is the /usb(n) level? Is that suposed to be a driver?
No, those are host controller entries.
| what is the (n)-0 or (n)-1 level?
|
| For the only device plugged in, there is both a 3-0 and 3-1 entry, what is
| this trying
| to tell me? There are only 4 USB plugs so...
|
| For the one 'plugged in' device there is a usb3/3-1/3-1:2.0 directory, while
| for all the
| other ports, with nothing plugged in the intermediary directory (3-1 here) is
| missing,
| viz usb1/1-0:1.0 what is the implication of this?
|
| Finally, for the one device plugged in, there is a host0 subdirectory, which
| then
| has a 0:0:0:0 subdirectory. Again, what are the implications of each of these?
Where is this 'host0' directory?
| I see the device SERIAL No. in the 3-1 subdirectory, so I have to assume that
| that is
| the actual Hardware Device, but the vendor and model are in the very lowest
| subdirectory,
| so mabe THAT is the actual hardware.
|
| Basically, Im confused, and if xomeone can either explain this, or point me to
| some
| document that does explain it (Ive looked,- without any luck) I would
| appreciate that.
|
| One other item.
| The 'speed' entry for all these devices is 12, except for usb1 which shows 480.
| A disk is plugged into the usb-card, so Im assumnig 3 & 4 refer to that card,
| but they show
| a speed of 12. Since the motherboard is OLD, I would assume USB1.0, and a
| speed of
| 12 not 480, and for the card, it is a USB2.0 card, so it SHOULD BE 480 and not
| 12.
| All three drivers are loaded [oue]hci_hcd, so this seems confused.
| Is there (possibly) some hotplug initialization missing?
|
| Confused, but willing to look at any documentation you can recommend.
Here's my explanation/summary, using my machine's USB devices.
.
|-- 1-0:1.0 -> ../../../devices/pci0000:00/0000:00:1f.2/usb1/1-0:1.0
|-- 2-0:1.0 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2/2-0:1.0
|-- 2-2 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2/2-2
|-- 2-2:1.0 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2/2-2/2-2:1.0
|-- 3-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-0:1.0
|-- 3-1 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1
|-- 3-1:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1/3-1:1.0
|-- 3-1:1.1 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1/3-1:1.1
|-- 3-1:1.2 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1/3-1:1.2
|-- 4-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.1/usb4/4-0:1.0
|-- 5-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.2/usb5/5-0:1.0
|-- 6-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.3/usb6/6-0:1.0
|-- 7-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.0/usb7/7-0:1.0
|-- 8-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.1/usb8/8-0:1.0
|-- 9-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.2/usb9/9-0:1.0
|-- usb1 -> ../../../devices/pci0000:00/0000:00:1f.2/usb1
|-- usb2 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2
|-- usb3 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3
|-- usb4 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.1/usb4
|-- usb5 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.2/usb5
|-- usb6 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.3/usb6
|-- usb7 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.0/usb7
|-- usb8 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.1/usb8
`-- usb9 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.2/usb9
lspci:
00:1f.2 USB Controller: Intel Corp. 82801BA/BAM USB (Hub #1) (rev 05)
00:1f.4 USB Controller: Intel Corp. 82801BA/BAM USB (Hub #2) (rev 05)
02:0d.0 USB Controller: Lucent Microelectronics: <OHCI controller #1>
02:0d.1 USB Controller: Lucent Microelectronics: <OHCI controller #2>
02:0d.2 USB Controller: Lucent Microelectronics: <OHCI controller #3>
02:0d.3 USB Controller: Lucent Microelectronics: <OHCI controller #4>
02:0e.0 USB Controller: NEC Corporation USB (rev 41)
02:0e.1 USB Controller: NEC Corporation USB (rev 41)
02:0e.2 USB Controller: NEC Corporation USB 2.0 (rev 02)
.
|-- 1-0:1.0 -> ../../../devices/pci0000:00/0000:00:1f.2/usb1/1-0:1.0
MMMM:BB MMMM:BB:DD.F H N-P:C.I
where: MMMM is PCI domain number
BB is PCI bus number
DD is PCI device number
F is PCI function number
H is USB bus/host controller number
P is USB "device path" [*]
C is USB device configuration number
I is USB device interface number
*: A USB device path saves a readable & stable topology identifier,
distinguishing devices by location for diagnostics, tools, etc.
The string is a path along hub ports, from the root.
Each device's id will be stable until USB is re-cabled, and
hubs are often labeled with these port numbers.
So a device path can be quite long, not just a simple number.
E.g., root == "0", root port 2 == "2", port 3 that hub "2.3".
The device path string continues up until a colon (':') is found.
|-- 2-0:1.0 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2/2-0:1.0
|-- 2-2 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2/2-2
|-- 2-2:1.0 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2/2-2/2-2:1.0
|-- 3-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-0:1.0
|-- 3-1 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1
|-- 3-1:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1/3-1:1.0
|-- 3-1:1.1 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1/3-1:1.1
|-- 3-1:1.2 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3/3-1/3-1:1.2
|-- 4-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.1/usb4/4-0:1.0
|-- 5-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.2/usb5/5-0:1.0
|-- 6-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.3/usb6/6-0:1.0
|-- 7-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.0/usb7/7-0:1.0
|-- 8-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.1/usb8/8-0:1.0
|-- 9-0:1.0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.2/usb9/9-0:1.0
|-- usb1 -> ../../../devices/pci0000:00/0000:00:1f.2/usb1
|-- usb2 -> ../../../devices/pci0000:00/0000:00:1f.4/usb2
|-- usb3 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.0/usb3
|-- usb4 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.1/usb4
|-- usb5 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.2/usb5
|-- usb6 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0d.3/usb6
|-- usb7 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.0/usb7
|-- usb8 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.1/usb8
`-- usb9 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:02:0e.2/usb9
--
~Randy
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