board/pcippc2/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 DECLARE_GLOBAL_DATA_PTR;
  30
  31 void    (*sconsole_putc) (char) = 0;
  32 void    (*sconsole_puts) (const char *) = 0;
  33 int     (*sconsole_getc) (void) = 0;
  34 int     (*sconsole_tstc) (void) = 0;
  35 void    (*sconsole_setbrg) (void) = 0;
  36
  37 int serial_init (void)
  38 {
  39         sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  40
  41         sb->pos  = 0;
  42         sb->size = 0;
  43         sb->baud = gd->baudrate;
  44         sb->max_size = CONFIG_SYS_SCONSOLE_SIZE - sizeof (sconsole_buffer_t);
  45
  46         return (0);
  47 }
  48
  49 void serial_putc (char c)
  50 {
  51         if (sconsole_putc) {
  52                 (*sconsole_putc) (c);
  53         } else {
  54                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  55
  56                 if (c) {
  57                         sb->data[sb->pos++] = c;
  58                         if (sb->pos == sb->max_size) {
  59                                 sb->pos = 0;
  60                         }
  61                         if (sb->size < sb->max_size) {
  62                                 sb->size++;
  63                         }
  64                 }
  65         }
  66 }
  67
  68 void serial_puts (const char *s)
  69 {
  70         if (sconsole_puts) {
  71                 (*sconsole_puts) (s);
  72         } else {
  73                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
  74
  75                 while (*s) {
  76                         sb->data[sb->pos++] = *s++;
  77                         if (sb->pos == sb->max_size) {
  78                                 sb->pos = 0;
  79                         }
  80                         if (sb->size < sb->max_size) {
  81                                 sb->size++;
  82                         }
  83                 }
  84         }
  85 }
  86
  87 int serial_getc (void)
  88 {
  89         if (sconsole_getc) {
  90                 return (*sconsole_getc) ();
  91         } else {
  92                 return 0;
  93         }
  94 }
  95
  96 int serial_tstc (void)
  97 {
  98         if (sconsole_tstc) {
  99                 return (*sconsole_tstc) ();
 100         } else {
 101                 return 0;
 102         }
 103 }
 104
 105 void serial_setbrg (void)
 106 {
 107         if (sconsole_setbrg) {
 108                 (*sconsole_setbrg) ();
 109         } else {
 110                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
 111
 112                 sb->baud = gd->baudrate;
 113         }
 114 }
 115
 116 int sconsole_get_baudrate (void)
 117 {
 118         sconsole_buffer_t *sb = SCONSOLE_BUFFER;
 119
 120         return sb->baud;
 121 }
 122
 123 void sconsole_flush (void)
 124 {
 125         if (sconsole_putc) {
 126                 sconsole_buffer_t *sb = SCONSOLE_BUFFER;
 127                 unsigned int end = sb->pos < sb->size
 128                                 ? sb->pos + sb->max_size - sb->size
 129                                 : sb->pos - sb->size;
 130
 131                 while (sb->size) {
 132                         (*sconsole_putc) (sb->data[end++]);
 133                         if (end == sb->max_size) {
 134                                 end = 0;
 135                         }
 136                         sb->size--;
 137                 }
 138         }
 139 }