151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*
|
|
* Generic serial console support
|
|
*
|
|
* Author: Mark A. Greer <mgreer@mvista.com>
|
|
*
|
|
* Code in serial_edit_cmdline() copied from <file:arch/ppc/boot/simple/misc.c>
|
|
* and was written by Matt Porter <mporter@kernel.crashing.org>.
|
|
*
|
|
* 2001,2006 (c) MontaVista Software, Inc. This file is licensed under
|
|
* the terms of the GNU General Public License version 2. This program
|
|
* is licensed "as is" without any warranty of any kind, whether express
|
|
* or implied.
|
|
*/
|
|
#include <stdarg.h>
|
|
#include <stddef.h>
|
|
#include "types.h"
|
|
#include "string.h"
|
|
#include "stdio.h"
|
|
#include "io.h"
|
|
#include "ops.h"
|
|
|
|
static int serial_open(void)
|
|
{
|
|
struct serial_console_data *scdp = console_ops.data;
|
|
return scdp->open();
|
|
}
|
|
|
|
static void serial_write(const char *buf, int len)
|
|
{
|
|
struct serial_console_data *scdp = console_ops.data;
|
|
|
|
while (*buf != '\0')
|
|
scdp->putc(*buf++);
|
|
}
|
|
|
|
static void serial_edit_cmdline(char *buf, int len)
|
|
{
|
|
int timer = 0, count;
|
|
char ch, *cp;
|
|
struct serial_console_data *scdp = console_ops.data;
|
|
|
|
cp = buf;
|
|
count = strlen(buf);
|
|
cp = &buf[count];
|
|
count++;
|
|
|
|
while (timer++ < 5*1000) {
|
|
if (scdp->tstc()) {
|
|
while (((ch = scdp->getc()) != '\n') && (ch != '\r')) {
|
|
/* Test for backspace/delete */
|
|
if ((ch == '\b') || (ch == '\177')) {
|
|
if (cp != buf) {
|
|
cp--;
|
|
count--;
|
|
printf("\b \b");
|
|
}
|
|
/* Test for ^x/^u (and wipe the line) */
|
|
} else if ((ch == '\030') || (ch == '\025')) {
|
|
while (cp != buf) {
|
|
cp--;
|
|
count--;
|
|
printf("\b \b");
|
|
}
|
|
} else if (count < len) {
|
|
*cp++ = ch;
|
|
count++;
|
|
scdp->putc(ch);
|
|
}
|
|
}
|
|
break; /* Exit 'timer' loop */
|
|
}
|
|
udelay(1000); /* 1 msec */
|
|
}
|
|
*cp = 0;
|
|
}
|
|
|
|
static void serial_close(void)
|
|
{
|
|
struct serial_console_data *scdp = console_ops.data;
|
|
|
|
if (scdp->close)
|
|
scdp->close();
|
|
}
|
|
|
|
static void *serial_get_stdout_devp(void)
|
|
{
|
|
void *devp;
|
|
char devtype[MAX_PROP_LEN];
|
|
char path[MAX_PATH_LEN];
|
|
|
|
devp = finddevice("/chosen");
|
|
if (devp == NULL)
|
|
goto err_out;
|
|
|
|
if (getprop(devp, "linux,stdout-path", path, MAX_PATH_LEN) > 0) {
|
|
devp = finddevice(path);
|
|
if (devp == NULL)
|
|
goto err_out;
|
|
|
|
if ((getprop(devp, "device_type", devtype, sizeof(devtype)) > 0)
|
|
&& !strcmp(devtype, "serial"))
|
|
return devp;
|
|
}
|
|
err_out:
|
|
return NULL;
|
|
}
|
|
|
|
static struct serial_console_data serial_cd;
|
|
|
|
/* Node's "compatible" property determines which serial driver to use */
|
|
int serial_console_init(void)
|
|
{
|
|
void *devp;
|
|
int rc = -1;
|
|
|
|
devp = serial_get_stdout_devp();
|
|
if (devp == NULL)
|
|
goto err_out;
|
|
|
|
if (dt_is_compatible(devp, "ns16550"))
|
|
rc = ns16550_console_init(devp, &serial_cd);
|
|
else if (dt_is_compatible(devp, "marvell,mpsc"))
|
|
rc = mpsc_console_init(devp, &serial_cd);
|
|
else if (dt_is_compatible(devp, "fsl,cpm1-scc-uart") ||
|
|
dt_is_compatible(devp, "fsl,cpm1-smc-uart") ||
|
|
dt_is_compatible(devp, "fsl,cpm2-scc-uart") ||
|
|
dt_is_compatible(devp, "fsl,cpm2-smc-uart"))
|
|
rc = cpm_console_init(devp, &serial_cd);
|
|
else if (dt_is_compatible(devp, "fsl,mpc5200-psc-uart"))
|
|
rc = mpc5200_psc_console_init(devp, &serial_cd);
|
|
else if (dt_is_compatible(devp, "xlnx,opb-uartlite-1.00.b") ||
|
|
dt_is_compatible(devp, "xlnx,xps-uartlite-1.00.a"))
|
|
rc = uartlite_console_init(devp, &serial_cd);
|
|
|
|
/* Add other serial console driver calls here */
|
|
|
|
if (!rc) {
|
|
console_ops.open = serial_open;
|
|
console_ops.write = serial_write;
|
|
console_ops.close = serial_close;
|
|
console_ops.data = &serial_cd;
|
|
|
|
if (serial_cd.getc)
|
|
console_ops.edit_cmdline = serial_edit_cmdline;
|
|
|
|
return 0;
|
|
}
|
|
err_out:
|
|
return -1;
|
|
}
|