projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 281e00a3 WD |
1 | The support for multiple serial interfaces as implemented is mainly |
| 2 | intended to allow for modem dial-in / dial-out while still being able | |
| 3 | to use a serial console on a (different) serial port. | |
| 4 | ||
| ff36fd85 WD |
5 | MPC8XX Specific |
| 6 | =============== | |
| 281e00a3 WD |
7 | At the moment, the ports must be split on a SMC and a SCC port on a |
| 8 | 8xx processor; other configurations are not (yet) supported. | |
| 9 | ||
| 10 | Support for hardware handshake has not been implemented yet (but is | |
| 11 | in the works). | |
| 12 | ||
| 13 | *) The default console depends on the keys pressed: | |
| 14 | - SMC if keys not pressed (modem not enabled) | |
| 15 | - SCC if keys pressed (modem enabled) | |
| 16 | ||
| 17 | *) The console can be switched to SCC by any of the following commands: | |
| 18 | ||
| 19 | setenv stdout serial_scc | |
| 20 | setenv stdin serial_scc | |
| 21 | setenv stderr serial_scc | |
| 22 | ||
| 23 | *) The console can be switched to SMC by any of the following commands: | |
| 24 | ||
| 25 | setenv stdout serial_smc | |
| 26 | setenv stdin serial_smc | |
| 27 | setenv stderr serial_smc | |
| 28 | ||
| 29 | *) If a file descriptor is set to "serial" then the current serial device | |
| 30 | will be used which, in turn, can be switched by above commands. | |
| 31 | ||
| 32 | *) The baudrate is the same for all serial devices. But it can be switched | |
| 33 | just after switching the console: | |
| 34 | ||
| 35 | setenv sout serial_scc; setenv baudrate 38400 | |
| 36 | ||
| 37 | After that press 'enter' at the SCC console. Note that baudrates <38400 | |
| 6d0f6bcf | 38 | are not allowed on LWMON with watchdog enabled (see CONFIG_SYS_BAUDRATE_TABLE in |
| 281e00a3 | 39 | include/configs/lwmon.h). |
| ff36fd85 WD |
40 | |
| 41 | ||
| 42 | PPC4XX Specific | |
| 43 | =============== | |
| 44 | *) The default console is UART0 | |
| 45 | ||
| 46 | *) The console can be switched to UART1 by any of the following commands: | |
| 47 | setenv stdout serial1 | |
| 48 | setenv stderr serial1 | |
| 49 | setenv stdin serial1 | |
| 50 | ||
| 51 | *) The console can be switched to UART0 by any of the following commands: | |
| 52 | setenv stdout serial0 | |
| 53 | setenv stderr serial0 | |
| 54 | setenv stdin serial0 |