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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008
* Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
*/
#include <common.h>
#include <console.h>
#include <serial.h>
#include <malloc.h>
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
void iomux_printdevs(const int console)
{
int i;
struct stdio_dev *dev;
for (i = 0; i < cd_count[console]; i++) {
dev = console_devices[console][i];
printf("%s ", dev->name);
}
printf("\n");
}
/* This tries to preserve the old list if an error occurs. */
int iomux_doenv(const int console, const char *arg)
{
char *console_args, *temp, **start;
int i, j, k, io_flag, cs_idx, repeat;
struct stdio_dev **cons_set, **old_set;
struct stdio_dev *dev;
console_args = strdup(arg);
if (console_args == NULL)
return 1;
/*
* Check whether a comma separated list of devices was
* entered and count how many devices were entered.
* The array start[] has pointers to the beginning of
* each device name (up to MAX_CONSARGS devices).
*
* Have to do this twice - once to count the number of
* commas and then again to populate start.
*/
i = 0;
temp = console_args;
for (;;) {
/* There's always one entry more than the number of commas. */
i++;
temp = strchr(temp, ',');
if (temp == NULL)
break;
temp++;
}
start = (char **)malloc(i * sizeof(char *));
if (start == NULL) {
free(console_args);
return 1;
}
i = 0;
start[0] = console_args;
for (;;) {
temp = strchr(start[i++], ',');
if (temp == NULL)
break;
*temp = '\0';
start[i] = temp + 1;
}
cons_set = (struct stdio_dev **)calloc(i, sizeof(struct stdio_dev *));
if (cons_set == NULL) {
free(start);
free(console_args);
return 1;
}
switch (console) {
case stdin:
io_flag = DEV_FLAGS_INPUT;
break;
case stdout:
case stderr:
io_flag = DEV_FLAGS_OUTPUT;
break;
default:
free(start);
free(console_args);
free(cons_set);
return 1;
}
cs_idx = 0;
for (j = 0; j < i; j++) {
/*
* Check whether the device exists and is valid.
* console_assign() also calls console_search_dev(),
* but I need the pointer to the device.
*/
dev = console_search_dev(io_flag, start[j]);
if (dev == NULL)
continue;
/*
* Prevent multiple entries for a device.
*/
repeat = 0;
for (k = 0; k < cs_idx; k++) {
if (dev == cons_set[k]) {
repeat++;
break;
}
}
if (repeat)
continue;
/*
* Try assigning the specified device.
* This could screw up the console settings for apps.
*/
if (console_assign(console, start[j]) < 0)
continue;
cons_set[cs_idx++] = dev;
}
free(console_args);
free(start);
/* failed to set any console */
if (cs_idx == 0) {
free(cons_set);
return 1;
}
old_set = console_devices[console];
repeat = cd_count[console];
console_devices[console] = cons_set;
cd_count[console] = cs_idx;
/* Stop dropped consoles */
for (i = 0; i < repeat; i++) {
for (j = 0; j < cs_idx; j++) {
if (old_set[i] == cons_set[j])
break;
}
if (j == cs_idx)
console_stop(console, old_set[i]);
}
free(old_set);
return 0;
}
#endif /* CONSOLE_MUX */
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