IOMUX: Add console multiplexing support.
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>
diff --git a/include/common.h b/include/common.h
index df64bf0..5968036 100644
--- a/include/common.h
+++ b/include/common.h
@@ -678,6 +678,13 @@
int ftstc(int file);
int fgetc(int file);
+/*
+ * CONSOLE multiplexing.
+ */
+#ifdef CONFIG_CONSOLE_MUX
+#include <iomux.h>
+#endif
+
int pcmcia_init (void);
#ifdef CONFIG_STATUS_LED