[PATCH] synclink.c: add loopback to async mode

Add internal loopback support for asynchronous mode operation.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 26b421b74bb6..ea2d54be4843 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -6151,6 +6151,11 @@ static void usc_set_async_mode( struct mgsl_struct *info )
                 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
         }
 
+        if (info->params.loopback) {
+                info->loopback_bits = 0x300;
+                outw(0x0300, info->io_base + CCAR);
+        }
+
 }       /* end of usc_set_async_mode() */
 
 /* usc_loopback_frame()