board/purple/sconsole.c

   1 /*
   2  * (C) Copyright 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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 <config.h>
  25 #include <common.h>
  26
  27 #include "sconsole.h"
  28
  29 void    (*sconsole_putc) (char) = 0;
  30 void    (*sconsole_puts) (const char *) = 0;
  31 int     (*sconsole_getc) (void) = 0;
  32 int     (*sconsole_tstc) (void) = 0;
  33 void    (*sconsole_setbrg) (void) = 0;
  34
  35 int serial_init (void)
  36 {
  37         sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  38
  39         sb->pos  = 0;
  40         sb->size = 0;
  41         sb->max_size = CFG_SCONSOLE_SIZE - sizeof (sconsole_buffer_t);
  42
  43         return (0);
  44 }
  45
  46 void serial_putc (char c)
  47 {
  48         if (sconsole_putc) {
  49                 (*sconsole_putc) (c);
  50         } else {
  51                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  52
  53                 if (c) {
  54                         sb->data[sb->pos++] = c;
  55                         if (sb->pos == sb->max_size) {
  56                                 sb->pos = 0;
  57                         }
  58                         if (sb->size < sb->max_size) {
  59                                 sb->size++;
  60                         }
  61                 }
  62         }
  63 }
  64
  65 void serial_puts (const char *s)
  66 {
  67         if (sconsole_puts) {
  68                 (*sconsole_puts) (s);
  69         } else {
  70                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  71
  72                 while (*s) {
  73                         sb->data[sb->pos++] = *s++;
  74                         if (sb->pos == sb->max_size) {
  75                                 sb->pos = 0;
  76                         }
  77                         if (sb->size < sb->max_size) {
  78                                 sb->size++;
  79                         }
  80                 }
  81         }
  82 }
  83
  84 int serial_getc (void)
  85 {
  86         if (sconsole_getc) {
  87                 return (*sconsole_getc) ();
  88         } else {
  89                 return 0;
  90         }
  91 }
  92
  93 int serial_tstc (void)
  94 {
  95         if (sconsole_tstc) {
  96                 return (*sconsole_tstc) ();
  97         } else {
  98                 return 0;
  99         }
 100 }
 101
 102 void serial_setbrg (void)
 103 {
 104         if (sconsole_setbrg) {
 105                 (*sconsole_setbrg) ();
 106         }
 107 }
 108
 109 void sconsole_flush (void)
 110 {
 111         if (sconsole_putc) {
 112                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
 113                 unsigned int end = sb->pos < sb->size
 114                                 ? sb->pos + sb->max_size - sb->size
 115                                 : sb->pos - sb->size;
 116
 117                 while (sb->size) {
 118                         (*sconsole_putc) (sb->data[end++]);
 119                         if (end == sb->max_size) {
 120                                 end = 0;
 121                         }
 122                         sb->size--;
 123                 }
 124         }
 125 }