include/linux/dmascc.h

   1 /*
   2  * $Id: dmascc.h,v 1.1 1997/12/01 10:44:55 oe1kib Exp $
   3  *
   4  * Driver for high-speed SCC boards (those with DMA support)
   5  * Copyright (C) 1997 Klaus Kudielka
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 /* Ioctls */
  23 #define SIOCGSCCPARAM SIOCDEVPRIVATE
  24 #define SIOCSSCCPARAM (SIOCDEVPRIVATE+1)
  25
  26 /* Frequency of timer 0 */
  27 #define TMR_0_HZ      25600
  28
  29 /* Configurable parameters */
  30 struct scc_param {
  31   int pclk_hz;  /* frequency of BRG input (read-only - don't change) */
  32   int brg_tc;   /* baud rate generator terminal count - BRG disabled if < 0 */
  33   int nrzi;     /* 0 (nrz), 1 (nrzi) */
  34   int clocks;   /* see documentation */
  35   int txdelay;  /* [1/TMR_0_HZ] */
  36   int txtime;   /* [1/HZ] */
  37   int sqdelay;  /* [1/TMR_0_HZ] */
  38   int waittime; /* [1/TMR_0_HZ] */
  39   int slottime; /* [1/TMR_0_HZ] */
  40   int persist;  /* 0 ... 255 */
  41   int dma;      /* 1, 3 */
  42 };
  43