Alan Stern wrote:
On Sat, 13 Sep 2003, James Courtier-Dutton wrote:
I have a USB device with descriptor type 7. The current lsusb only
handles up to 5, So it just prints: -
unknown descriptor type: 07 21 07 88 13 ff 03
I have looked through all the usb docs I can find on the web, but no luck.
Can anyone point me to a document that enumerates the descriptor types,
so that I can update lsusb.c, so that it does better decode of
descriptor types.
The USB-2.0 specification lists the standard descriptor types (table 9.5).
They're also listed in include/linux/usb_ch9.h. Type 7 is an "Other Speed
Configuration" descriptor. For a device operating at high-speed it gives
full-speed configuration information, and vice-versa.
Alan Stern
I made a mistake. That hex output means, Length 7, Descriptor type 0x21.
So where do I find Descriptor type 0x21
I currently think that this is decoded from: -
#define USB_TYPE_CLASS (0x01 << 5)
#define USB_DT_HID (USB_TYPE_CLASS | 0x01)
Is that correct?
Those define's are taken from /usr/include/linux/usb.h
But /usr/src/linux2.6.0/include/linux/usb.h does not have them.
Cheers
James
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