mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-28 07:03:31 +08:00
16a28ef219
Modifications to support console multiplexing. This is controlled using CONFIG_SYS_CONSOLE_MUX in the board configuration file. This allows a user to specify multiple console devices in the environment with a command like this: setenv stdin serial,nc. As a result, the user can enter text on both the serial and netconsole interfaces. All devices - stdin, stdout and stderr - can be set in this manner. 1) common/iomux.c and include/iomux.h contain the environment setting implementation. 2) doc/README.iomux contains a somewhat more detailed description. 3) The implementation in (1) is called from common/cmd_nvedit.c to handle setenv and from common/console.c to handle initialization of input/output devices at boot time. 4) common/console.c also contains the code needed to poll multiple console devices for input and send output to all devices registered for output. 5) include/common.h includes iomux.h and common/Makefile generates iomux.o when CONFIG_SYS_CONSOLE_MUX is set. Signed-off-by: Gary Jennejohn <garyj@denx.de>
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/*
|
|
* (C) Copyright 2008
|
|
* Gary Jennejohn, DENX Software Engineering GmbH, garyj@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
|
|
*/
|
|
|
|
#ifndef _IO_MUX_H
|
|
#define _IO_MUX_H
|
|
|
|
#include <devices.h>
|
|
|
|
/*
|
|
* Stuff required to support console multiplexing.
|
|
*/
|
|
|
|
/*
|
|
* Pointers to devices used for each file type. Defined in console.c
|
|
* but storage is allocated in iomux.c.
|
|
*/
|
|
extern device_t **console_devices[MAX_FILES];
|
|
/*
|
|
* The count of devices assigned to each FILE. Defined in console.c
|
|
* and populated in iomux.c.
|
|
*/
|
|
extern int cd_count[MAX_FILES];
|
|
|
|
int iomux_doenv(const int, const char *);
|
|
void iomux_printdevs(const int);
|
|
device_t *search_device(int, char *);
|
|
|
|
#endif /* _IO_MUX_H */
|