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/*
* (C) Copyright 2004
* 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 <common.h>
#include <serial.h>
#include <stdio_dev.h>
#include <post.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
static struct serial_device *serial_devices;
static struct serial_device *serial_current;
static void serial_null(void)
{
}
#define serial_initfunc(name) \
void name(void) \
__attribute__((weak, alias("serial_null")));
serial_initfunc(mpc8xx_serial_initialize);
serial_initfunc(ns16550_serial_initialize);
serial_initfunc(pxa_serial_initialize);
serial_initfunc(s3c24xx_serial_initialize);
serial_initfunc(s5p_serial_initialize);
serial_initfunc(zynq_serial_initalize);
serial_initfunc(bfin_serial_initialize);
serial_initfunc(bfin_jtag_initialize);
serial_initfunc(mpc512x_serial_initialize);
serial_initfunc(uartlite_serial_initialize);
void serial_register(struct serial_device *dev)
{
#ifdef CONFIG_NEEDS_MANUAL_RELOC
dev->start += gd->reloc_off;
dev->setbrg += gd->reloc_off;
dev->getc += gd->reloc_off;
dev->tstc += gd->reloc_off;
dev->putc += gd->reloc_off;
dev->puts += gd->reloc_off;
#endif
dev->next = serial_devices;
serial_devices = dev;
}
void serial_initialize(void)
{
mpc8xx_serial_initialize();
ns16550_serial_initialize();
pxa_serial_initialize();
s3c24xx_serial_initialize();
s5p_serial_initialize();
mpc512x_serial_initialize();
bfin_serial_initialize();
bfin_jtag_initialize();
uartlite_serial_initialize();
zynq_serial_initalize();
serial_assign(default_serial_console()->name);
}
void serial_stdio_init(void)
{
struct stdio_dev dev;
struct serial_device *s = serial_devices;
while (s) {
memset(&dev, 0, sizeof(dev));
strcpy(dev.name, s->name);
dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
dev.start = s->start;
dev.stop = s->stop;
dev.putc = s->putc;
dev.puts = s->puts;
dev.getc = s->getc;
dev.tstc = s->tstc;
stdio_register(&dev);
s = s->next;
}
}
int serial_assign(const char *name)
{
struct serial_device *s;
for (s = serial_devices; s; s = s->next) {
if (strcmp(s->name, name) == 0) {
serial_current = s;
return 0;
}
}
return 1;
}
void serial_reinit_all(void)
{
struct serial_device *s;
for (s = serial_devices; s; s = s->next)
s->start();
}
static struct serial_device *get_current(void)
{
struct serial_device *dev;
if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
dev = default_serial_console();
/* We must have a console device */
if (!dev)
panic("Cannot find console");
} else
dev = serial_current;
return dev;
}
int serial_init(void)
{
return get_current()->start();
}
void serial_setbrg(void)
{
get_current()->setbrg();
}
int serial_getc(void)
{
return get_current()->getc();
}
int serial_tstc(void)
{
return get_current()->tstc();
}
void serial_putc(const char c)
{
get_current()->putc(c);
}
void serial_puts(const char *s)
{
get_current()->puts(s);
}
#if CONFIG_POST & CONFIG_SYS_POST_UART
static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
/* Mark weak until post/cpu/.../uart.c migrate over */
__weak
int uart_post_test(int flags)
{
unsigned char c;
int ret, saved_baud, b;
struct serial_device *saved_dev, *s;
bd_t *bd = gd->bd;
/* Save current serial state */
ret = 0;
saved_dev = serial_current;
saved_baud = bd->bi_baudrate;
for (s = serial_devices; s; s = s->next) {
/* If this driver doesn't support loop back, skip it */
if (!s->loop)
continue;
/* Test the next device */
serial_current = s;
ret = serial_init();
if (ret)
goto done;
/* Consume anything that happens to be queued */
while (serial_tstc())
serial_getc();
/* Enable loop back */
s->loop(1);
/* Test every available baud rate */
for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
bd->bi_baudrate = bauds[b];
serial_setbrg();
/*
* Stick to printable chars to avoid issues:
* - terminal corruption
* - serial program reacting to sequences and sending
* back random extra data
* - most serial drivers add in extra chars (like \r\n)
*/
for (c = 0x20; c < 0x7f; ++c) {
/* Send it out */
serial_putc(c);
/* Make sure it's the same one */
ret = (c != serial_getc());
if (ret) {
s->loop(0);
goto done;
}
/* Clean up the output in case it was sent */
serial_putc('\b');
ret = ('\b' != serial_getc());
if (ret) {
s->loop(0);
goto done;
}
}
}
/* Disable loop back */
s->loop(0);
/* XXX: There is no serial_stop() !? */
if (s->stop)
s->stop();
}
done:
/* Restore previous serial state */
serial_current = saved_dev;
bd->bi_baudrate = saved_baud;
serial_reinit_all();
serial_setbrg();
return ret;
}
#endif