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Diffstat (limited to 'qemu/roms/u-boot/doc/README.serial_multi')
| -rw-r--r-- | qemu/roms/u-boot/doc/README.serial_multi | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/qemu/roms/u-boot/doc/README.serial_multi b/qemu/roms/u-boot/doc/README.serial_multi deleted file mode 100644 index ad61d4261..000000000 --- a/qemu/roms/u-boot/doc/README.serial_multi +++ /dev/null @@ -1,80 +0,0 @@ -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. - -MPC8XX Specific -=============== -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 CONFIG_SYS_BAUDRATE_TABLE in -include/configs/lwmon.h). - - -PPC4XX Specific -=============== -*) The default console is UART0 - -*) The console can be switched to UART1 by any of the following commands: - setenv stdout serial1 - setenv stderr serial1 - setenv stdin serial1 - -*) The console can be switched to UART0 by any of the following commands: - setenv stdout serial0 - setenv stderr serial0 - setenv stdin serial0 - -MPC5xxx Specific -================ - -Up to two PSCs can be used as console. - -Support for hardware handshake has not been implemented yet. - -*) The first (default) console port is defined by: - #define CONFIG_PSC_CONSOLE <PSC number> - -*) The second (alternative) console port is defined by: - #define CONFIG_PSC_CONSOLE2 <PSC number> - -*) Commands to switch to the second console: - setenv stdout serial1 - setenv stderr serial1 - setenv stdin serial1 - -*) Commands to switch to the first console: - setenv stdout serial0 - setenv stderr serial0 - setenv stdin serial0 - -*) If a file descriptor is set to "serial" then the - current serial device will be used. |