[patch] fixed serial handling in gnumach

[Diego Roversi]

Hi,

  I finally fixed gnumach so it can handle sustained transfert on serial
port at higher speed. On my PC works great so I'm posting the patch for any
brave guys who want test it on their PC.

  I hope to see the patch applied to the official gnumach soon, so I don't
have to manually apply to any new version of gnumach.

diff -u -r1.3 chario.c
--- device/chario.c     2001/04/29 20:29:29     1.3
+++ device/chario.c     2001/10/19 19:37:20
@@ -55,8 +55,8 @@
  * is greater than largest tthiwat entry.
  */
 short  tthiwat[NSPEEDS] =
-   { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000,
-     2000,2000 };
+   { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1024,1024,
+     1024,1024 };
 short  ttlowat[NSPEEDS] =
    {  30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125, 125, 125,
      125,125 };
@@ -122,8 +122,8 @@
   pdma_timeouts[B2400] = _PR(240);
   pdma_timeouts[B4800] = _PR(480);
   pdma_timeouts[B9600] = _PR(960);
-  pdma_timeouts[EXTA]  = _PR(1440); /* >14400 baud */
-  pdma_timeouts[EXTB]  = _PR(1920); /* >19200 baud */
+  pdma_timeouts[B19200]  = _PR(1920); /* >14400 baud */
+  pdma_timeouts[B38400]  = _PR(3840); /* >19200 baud */
   pdma_timeouts[B57600] = _PR(5760);
   pdma_timeouts[B115200] = _PR(11520);
 
@@ -143,13 +143,21 @@
   pdma_water_mark[B1800] = _PR(180);
   pdma_water_mark[B2400] = _PR(240);
   pdma_water_mark[B4800] = _PR(480);
+  pdma_water_mark[B9600] = _PR(960);
+  pdma_water_mark[B19200] = _PR(1920);
+  pdma_water_mark[B38400] = 192;
+  pdma_water_mark[B57600] = 96;
+  pdma_water_mark[B115200] = 64;
+   
+#if 0   
   i = tty_inq_size/2;
   pdma_water_mark[B9600] = i;
   pdma_water_mark[EXTA]  = i; /* >14400 baud */
   pdma_water_mark[EXTB]  = i; /* >19200 baud */
   pdma_water_mark[B57600] = i;
   pdma_water_mark[B115200] = i;
-
+#endif
+   
   return;
 }
 

-- 
Saluti / Regards

Diego Roversi | diegor at maganet.net
              | diegor at tiscalinet.it