[Qemu-discuss] Serial ports config

[FRNC RAMS]

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. My problem goes like this:

At the guest kernel boot Im 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:

 address@hidden 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:

address@hidden ~]# setserial /dev/ttyO0 uart 8250                              
setserial: can't set serial info: Invalid argument
address@hidden ~]# 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.

Any Idea on how to solve this?