mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 02:08:38 +00:00
281e00a3be
* Patch by Sascha Hauer, 28 Jun: - add generic support for Motorola i.MX architecture - add support for mx1ads, mx1fs2 and scb9328 boards * Patches by Marc Leeman, 23 Jul 2004: - Add define for the PCI/Memory Buffer Configuration Register - corrected comments in cpu/mpc824x/cpu_init.c * Add support for multiple serial interfaces (for example to allow modem dial-in / dial-out)
37 lines
1.3 KiB
Text
37 lines
1.3 KiB
Text
The support for multiple serial interfaces as implemented is mainly
|
|
intended to allow for modem dial-in / dial-out while still being able
|
|
to use a serial console on a (different) serial port.
|
|
|
|
At the moment, the ports must be split on a SMC and a SCC port on a
|
|
8xx processor; other configurations are not (yet) supported.
|
|
|
|
Support for hardware handshake has not been implemented yet (but is
|
|
in the works).
|
|
|
|
*) The default console depends on the keys pressed:
|
|
- SMC if keys not pressed (modem not enabled)
|
|
- SCC if keys pressed (modem enabled)
|
|
|
|
*) The console can be switched to SCC by any of the following commands:
|
|
|
|
setenv stdout serial_scc
|
|
setenv stdin serial_scc
|
|
setenv stderr serial_scc
|
|
|
|
*) The console can be switched to SMC by any of the following commands:
|
|
|
|
setenv stdout serial_smc
|
|
setenv stdin serial_smc
|
|
setenv stderr serial_smc
|
|
|
|
*) If a file descriptor is set to "serial" then the current serial device
|
|
will be used which, in turn, can be switched by above commands.
|
|
|
|
*) The baudrate is the same for all serial devices. But it can be switched
|
|
just after switching the console:
|
|
|
|
setenv sout serial_scc; setenv baudrate 38400
|
|
|
|
After that press 'enter' at the SCC console. Note that baudrates <38400
|
|
are not allowed on LWMON with watchdog enabled (see CFG_BAUDRATE_TABLE in
|
|
include/configs/lwmon.h).
|