1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * (C) Copyright 2008
4  * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
5  */
6 
7 #ifndef _IO_MUX_H
8 #define _IO_MUX_H
9 
10 #include <stdio_dev.h>
11 
12 /*
13  * Stuff required to support console multiplexing.
14  */
15 
16 /*
17  * Pointers to devices used for each file type.  Defined in console.c
18  * but storage is allocated in iomux.c.
19  */
20 extern struct stdio_dev **console_devices[MAX_FILES];
21 /*
22  * The count of devices assigned to each FILE.  Defined in console.c
23  * and populated in iomux.c.
24  */
25 extern int cd_count[MAX_FILES];
26 
27 #define for_each_console_dev(i, file, dev)		\
28 	for (i = 0, dev = console_devices[file][i];	\
29 	     i < cd_count[file];			\
30 	     i++, dev = console_devices[file][i])
31 
32 int iomux_match_device(struct stdio_dev **, const int, struct stdio_dev *);
33 int iomux_doenv(const int, const char *);
34 int iomux_replace_device(const int, const char *, const char *);
35 void iomux_printdevs(const int);
36 
37 #endif /* _IO_MUX_H */
38