usb/140923: Add support for new rev of USB Ethernet chip

[Brett Glass]

>Number:         140923
>Category:       usb
>Synopsis:       Add support for new rev of USB Ethernet chip
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          update
>Submitter-Id:   current-users
>Arrival-Date:   Fri Nov 27 06:00:11 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Brett Glass
>Release:        8.0-RELEASE
>Organization:
LARIAT
>Environment:
>Description:
The ASIX AX88772A USB 2.0 Ethernet chip has replaced the ASIC AX88772. Unlike the original, it doesn't tend to corrupt its buffers. I just bought about a dozen inexpensive USB Ethernet adapters that use this chip, and discovered to my dismay that though there was driver support (axe(4)) for the older version, the driver would not recognize the newer one. I managed to get it working by patching two files. Please incorporate the changes into the tree.
>How-To-Repeat:
Plug in a Sabrent (or similar) USB Ethernet adapter based on the AX88772A. FreeBSD 8.0-RELEASE won't recognize it.
>Fix:
Patch file attached. I also recommend including 

options USB_VERBOSE

in the GENERIC kernel configuration (it is not there currently). Otherwise, the vendor and device names won't be printed in the boot messages.

Patch attached with submission follows:

*** /sys/dev/usb/usbdevs.orig	Thu Nov 26 17:00:13 2009
--- /sys/dev/usb/usbdevs	Thu Nov 26 18:43:33 2009
***************
*** 894,897 ****
--- 894,899 ----
  product ASIX AX88178		0x1780	AX88178
  product ASIX AX88772		0x7720	AX88772
+ /* Added by Brett Glass to support ASIX AX88772A, an updated AX88772 */
+ product ASIX AX88772A		0x772a	AX88772A USB 2.0 10/100 Ethernet
  
  /* ASUS products */
*** /sys/dev/usb/net/if_axe.c.orig	Thu Nov 26 17:07:25 2009
--- /sys/dev/usb/net/if_axe.c	Thu Nov 26 17:13:12 2009
***************
*** 142,145 ****
--- 142,147 ----
  	{USB_VPI(USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88178, AXE_FLAG_178)},
  	{USB_VPI(USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88772, AXE_FLAG_772)},
+ /* Added by Brett Glass to support ASIX AX88772A, an updated AX88772 */
+ 	{USB_VPI(USB_VENDOR_ASIX, USB_PRODUCT_ASIX_AX88772A, AXE_FLAG_772)},
  	{USB_VPI(USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC210T, 0)},
  	{USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5D5055, AXE_FLAG_178)},


>Release-Note:
>Audit-Trail:
>Unformatted: