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/*
* (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 <serial.h>
#include <linux/compiler.h>
#include "sconsole.h"
DECLARE_GLOBAL_DATA_PTR;
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;
static int sconsole_serial_init(void)
{
sconsole_buffer_t *sb = SCONSOLE_BUFFER;
sb->pos = 0;
sb->size = 0;
sb->baud = gd->baudrate;
sb->max_size = CONFIG_SYS_SCONSOLE_SIZE - sizeof (sconsole_buffer_t);
return (0);
}
static void sconsole_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++;
}
}
}
}
static void sconsole_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++;
}
}
}
}
static int sconsole_serial_getc(void)
{
if (sconsole_getc) {
return (*sconsole_getc) ();
} else {
return 0;
}
}
static int sconsole_serial_tstc(void)
{
if (sconsole_tstc) {
return (*sconsole_tstc) ();
} else {
return 0;
}
}
static void sconsole_serial_setbrg(void)
{
if (sconsole_setbrg) {
(*sconsole_setbrg) ();
} else {
sconsole_buffer_t *sb = SCONSOLE_BUFFER;
sb->baud = gd->baudrate;
}
}
static struct serial_device sconsole_serial_drv = {
.name = "sconsole_serial",
.start = sconsole_serial_init,
.stop = NULL,
.setbrg = sconsole_serial_setbrg,
.putc = sconsole_serial_putc,
.puts = sconsole_serial_puts,
.getc = sconsole_serial_getc,
.tstc = sconsole_serial_tstc,
};
void sconsole_serial_initialize(void)
{
serial_register(&sconsole_serial_drv);
}
__weak struct serial_device *default_serial_console(void)
{
return &sconsole_serial_drv;
}
int sconsole_get_baudrate (void)
{
sconsole_buffer_t *sb = SCONSOLE_BUFFER;
return sb->baud;
}
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--;
}
}
}
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