error-codes.txt

Usb1.1驱动c语言源代码

$Id: error-codes.txt,v 1.5 2000/01/17 16:01:44 fliegl Exp $

This is the documentation of (hopefully) all possible error codes (and
their interpretation) that can be returned from the hostcontroller driver 
and from usbcore.

More documentation can be found at http://usb.in.tum.de

NOTE:
The USB_ST_* codes are deferred and are only listed for compatibility, new
software should use only -E* instead!



**************************************************************************
*                   Error codes returned by usb_submit_urb               *
**************************************************************************

Non-USB-specific:

USB_ST_NOERROR
0		URB submission went fine

-ENOMEM		no memory for allocation of internal structures	

USB-specific:

-ENODEV		specified USB-device or bus doesn't exist

-ENXIO		URB already queued 

USB_ST_URB_INVALID_ERROR
-EINVAL		a) Invalid transfer type specified (or not supported)
		b) Invalid interrupt interval (0<=n<256)
		c) more than one interrupt packet requested

-EAGAIN		a) specified ISO start frame too early
		b) (using ISO-ASAP) too much scheduled for the future
		   wait some time and try again.

-EFBIG		too much ISO frames requested (currently uhci>900)

-EPIPE		specified pipe-handle is already stalled

-EMSGSIZE	endpoint message size is zero, do interface/alternate setting


**************************************************************************
*                   Error codes returned by in urb->status               *
*                   or in iso_frame_desc[n].status (for ISO)             *
**************************************************************************

USB_ST_NOERROR
0			Transfer completed successfully

USB_ST_URB_KILLED
-ENOENT			URB was canceled by unlink_urb

USB_ST_URB_PENDING
-EINPROGRESS		URB still pending, no results yet
			(actually no error until now;-)

USB_ST_BITSTUFF
USB_ST_INTERNALERROR
-EPROTO			a) bitstuff error
			b) unknown USB error 

USB_ST_CRC
-EILSEQ			CRC mismatch

-EPIPE			a) babble detect
			b) endpoint stalled

USB_ST_BUFFERUNDERRUN
-ENOSR			buffer error

USB_ST_NORESPONSE
USB_ST_TIMEOUT
-ETIMEDOUT		transfer timed out, NAK

USB_ST_REMOVED	
-ENODEV			device was removed

USB_ST_SHORT_PACKET
-EREMOTEIO		short packet detected

USB_ST_PARTIAL_ERROR
-EXDEV			ISO transfer only partially completed
			look at individual frame status for details

USB_ST_URB_INVALID_ERROR
-EINVAL			ISO madness, if this happens: Log off and go home

**************************************************************************
*              Error codes returned by usbcore-functions                 *
*           (expect also other submit and transfer status codes)         *
**************************************************************************

usb_register():
USB_ST_NOTSUPPORTED
-EINVAL			error during registering new driver

usb_terminate_bulk():
USB_ST_REMOVED
-ENODEV			urb already removed

usb_get_*/usb_set_*():
			All USB errors (submit/status) can occur