text: /*
   * (C) Copyright 2002
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  #include <config.h>
  #include <common.h>
  
  #include "sconsole.h"
  
  void	(*sconsole_putc) (char) = 0;
  void	(*sconsole_puts) (const char *) = 0;
  int	(*sconsole_getc) (void) = 0;
  int	(*sconsole_tstc) (void) = 0;
  void	(*sconsole_setbrg) (void) = 0;
  
  int serial_init (void)
  {
  	sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  
  	sb->pos  = 0;
  	sb->size = 0;
  	sb->max_size = CONFIG_SYS_SCONSOLE_SIZE - sizeof (sconsole_buffer_t);
  
  	return (0);
  }
  
  void serial_putc (char c)
  {
  	if (sconsole_putc) {
  		(*sconsole_putc) (c);
  	} else {
  		sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  
  		if (c) {
  			sb->data[sb->pos++] = c;
  			if (sb->pos == sb->max_size) {
  				sb->pos = 0;
  			}
  			if (sb->size < sb->max_size) {
  				sb->size++;
  			}
  		}
  	}
  }
  
  void serial_puts (const char *s)
  {
  	if (sconsole_puts) {
  		(*sconsole_puts) (s);
  	} else {
  		sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  
  		while (*s) {
  			sb->data[sb->pos++] = *s++;
  			if (sb->pos == sb->max_size) {
  				sb->pos = 0;
  			}
  			if (sb->size < sb->max_size) {
  				sb->size++;
  			}
  		}
  	}
  }
  
  int serial_getc (void)
  {
  	if (sconsole_getc) {
  		return (*sconsole_getc) ();
  	} else {
  		return 0;
  	}
  }
  
  int serial_tstc (void)
  {
  	if (sconsole_tstc) {
  		return (*sconsole_tstc) ();
  	} else {
  		return 0;
  	}
  }
  
  void serial_setbrg (void)
  {
  	if (sconsole_setbrg) {
  		(*sconsole_setbrg) ();
  	}
  }
  
  void sconsole_flush (void)
  {
  	if (sconsole_putc) {
  		sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  		unsigned int end = sb->pos < sb->size
  				? sb->pos + sb->max_size - sb->size
  				: sb->pos - sb->size;
  
  		while (sb->size) {
  			(*sconsole_putc) (sb->data[end++]);
  			if (end == sb->max_size) {
  				end = 0;
  			}
  			sb->size--;
  		}
  	}
  }
  