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Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/1188991')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/1188991 | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/1188991 b/results/classifier/accel-gemma3:12b/kvm/1188991 new file mode 100644 index 000000000..7b8c79df7 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/1188991 @@ -0,0 +1,61 @@ + +Unable to do serial communication using -chardev tty + + + +Im running an Linux Image (kernel 3.2.8) for beagleboard-xm on QEMU's 1.4.0 emulator. + + +What I want to do is to have a communication between guest and host across serial the 4 differents ttyO present on the guest. QEMU offer facilities to redirect the trafic to some device in the host side. + +The command that I use to lauch QEMU is : + + sudo qemu-system-arm -M beaglexm -m 1024 -sd ./test.img -clock unix -see -device usb-kbd -chardev tty,id=mytty,path=/dev/ttyS0 + +As it says in the QEMU's manual -chardev is suppose to connect to a local tty device at the path given + +My problem goes like this: + +At the guest kernel boot I'm able to see that my UART where enabled + + [ 2.682040] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled + [ 2.777947] omap_uart.0: ttyO0 at MMIO 0x4806a000 (irq = 72) is a OMAP UART0 + [ 2.794967] omap_uart.1: ttyO1 at MMIO 0x4806c000 (irq = 73) is a OMAP UART1 + [ 2.814942] omap_uart.2: ttyO2 at MMIO 0x49020000 (irq = 74) is a OMAP UART2 + [ 2.966825] console [ttyO2] enabled + [ 2.984777] omap_uart.3: ttyO3 at MMIO 0x49042000 (irq = 80) is a OMAP UART3 + +In fact, when I go see in to /proc/tty/driver and I do a cat on OMAP-SERIAL Im able to see this serinfo:1.0 driver revision: + + 0: uart:OMAP UART0 mmio:0x4806A000 irq:72 tx:0 rx:0 CTS|DSR|CD + 1: uart:OMAP UART1 mmio:0x4806C000 irq:73 tx:0 rx:0 CTS|DSR|CD + 2: uart:OMAP UART2 mmio:0x49020000 irq:74 tx:268 rx:37 RTS|CTS|DTR|DSR|CD + 3: uart:OMAP UART3 mmio:0x49042000 irq:80 tx:0 rx:0 CTS|DSR|CD + +I know that ttyO2 is working because my console is been redirected to it. The thing is that doing a set serial on any of the ttyO I get the following message: + + [root@enu driver]# setserial -a /dev/ttyO0 + /dev/ttyO0, Line 0, UART: undefined, Port: 0x0000, IRQ: 72 + Baud_base: 3000000, close_delay: 50, divisor: 0 + closing_wait: 3000 + Flags: spd_normal + +The same goes with ttyO2. I tryed to set some sethings to any of the ttyO with setserial but I always get the same message: + + [root@enu ~]# setserial /dev/ttyO0 uart 8250 + setserial: can't set serial info: Invalid argument + [root@enu ~]# setserial /dev/ttyO0 port 0x4806a000 + setserial: can't set serial info: Invalid argument + +basicly I want to establish a serial communication between a guest and a host, but the serial ports on the guest side aren't well configured. + +When I open ttyS0 with minicom on the host side and do on the guest side + + echo "test" > /dev/ttyO0 + +The host recives nothing. + +Anyone can tell me how I could remove tty modules on the guest side and try to insert it again to see if the setup resets properly or give me any advice on how to solve this problem. Plus if anyone has already tryed doing this kind on serial communication I would like to here from you. + +Thank, +Francisco \ No newline at end of file |