USB: support for cdc-acm of single interface devices

This implement support in cdc-acm for acm devices another popular OS can handle

- adds support for autodetection of devices that use one interface
- autodetection of endpoints
- add a quirk for surpressing a setting that OS doesn't use
- autoassume that quirk for single interface devices

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 4c3856420add..1602324808ba 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -125,6 +125,7 @@ struct acm {
         unsigned char clocal;                           /* termios CLOCAL */
         unsigned int ctrl_caps;                         /* control capabilities from the class specific header */
         unsigned int susp_count;                        /* number of suspended interfaces */
+        int combined_interfaces:1;                      /* control and data collapsed */
         struct acm_wb *delayed_wb;                      /* write queued for a device about to be woken */
 };
 
@@ -133,3 +134,4 @@ struct acm {
 /* constants describing various quirks and errors */
 #define NO_UNION_NORMAL                 1
 #define SINGLE_RX_URB                   2
+#define NO_CAP_LINE                     4