board/bmw/serial.c

   1 /*
   2  * (C) Copyright 2000
   3  * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include "ns16550.h"
  26
  27 #if CONFIG_CONS_INDEX == 1
  28 static struct NS16550 *console =
  29                 (struct NS16550 *) (CFG_EUMB_ADDR + 0x4500);
  30 #elif CONFIG_CONS_INDEX == 2
  31 static struct NS16550 *console =
  32                 (struct NS16550 *) (CFG_EUMB_ADDR + 0x4500);
  33 #else
  34 #error no valid console defined
  35 #endif
  36
  37 extern ulong get_bus_freq (ulong);
  38
  39 int serial_init (void)
  40 {
  41         DECLARE_GLOBAL_DATA_PTR;
  42
  43         int clock_divisor = gd->bus_clk / 16 / gd->baudrate;
  44
  45         NS16550_init (CONFIG_CONS_INDEX - 1, clock_divisor);
  46
  47         return (0);
  48 }
  49
  50 void serial_putc (const char c)
  51 {
  52         if (c == '\n') {
  53                 serial_putc ('\r');
  54         }
  55         NS16550_putc (console, c);
  56 }
  57
  58 void serial_puts (const char *s)
  59 {
  60         while (*s) {
  61                 serial_putc (*s++);
  62         }
  63 }
  64
  65
  66 int serial_getc (void)
  67 {
  68         return NS16550_getc (console);
  69 }
  70
  71 int serial_tstc (void)
  72 {
  73         return NS16550_tstc (console);
  74 }
  75
  76 void serial_setbrg (void)
  77 {
  78         DECLARE_GLOBAL_DATA_PTR;
  79
  80         int clock_divisor = get_bus_freq (0) / 16 / gd->baudrate;
  81
  82         NS16550_reinit (console, clock_divisor);
  83 }