u-boot-brain/board/pcippc2/sconsole.c
Marek Vasut 26d8eaaa48 serial: powerpc: Implement CONFIG_SERIAL_MULTI into sconsole serial driver
Implement support for CONFIG_SERIAL_MULTI into sconsole serial driver.
This driver was so far only usable directly, but this patch also adds
support for the multi method. This allows using more than one serial
driver alongside the sconsole driver. Also, add a weak implementation
of default_serial_console() returning this driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>
2012-10-15 11:53:53 -07:00

194 lines
3.7 KiB
C

/*
* (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;
}
}
#ifdef CONFIG_SERIAL_MULTI
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;
}
#else
int serial_init(void)
{
return sconsole_serial_init();
}
void serial_setbrg(void)
{
sconsole_serial_setbrg();
}
void serial_putc(const char c)
{
sconsole_serial_putc(c);
}
void serial_puts(const char *s)
{
sconsole_serial_puts(s);
}
int serial_getc(void)
{
return sconsole_serial_getc();
}
int serial_tstc(void)
{
return sconsole_serial_tstc();
}
#endif
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--;
}
}
}