Re: [Xen-devel] Serial console on non-legacy PCI serial card?

[Nigel Gamble <nigel@xxxxxxx>]

Thanks for the suggestion.  I've tried all frequencies of the form

115200 * 2^n, for n = 0 to 8

but none of them seemed to work.  It looks like the Linux early_uart  
driver has a bit more functionality when dealing with non-legacy ports  
that the current Xen driver.
Nigel

On Apr 28, 2009, at 1:28 PM, Ross Philipson wrote:

> Perhaps you need to specify the crystal frequency of the device. The  
> parameter would look like:
> com1=115200/<frequency>,8n1,0x1060,0 console=vga,com1
>
> Of course I don't know what it might be for this card.
>
> Thanks
> Ross
>
>
>
> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> ] On Behalf Of Nigel Gamble
> Sent: Tuesday, April 28, 2009 3:36 PM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] Serial console on non-legacy PCI serial card?
>
> I have an Intel DX50SO motherboard for a Core i7 CPU which has no
> legacy ports whatsoever, so no COM1 serial port.  I added a "SIIG
> CyberPro PCI 1S" single serial port PCI card.
>
> Linux dmesg shows it as:
>
> [   30.244790] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [   30.244984] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a NS16550A
> [   30.245287] serial 0000:06:02.0: PCI INT A -> GSI 18 (level, low) -
> > IRQ 18
> [   30.245459] ttyS0: detected caps 00000700 should be 00000100
> [   30.245518] 0000:06:02.0: ttyS0 at I/O 0x1060 (irq = 18) is a
> 16C950/954
> [   30.245583] console [ttyS0] enabled
> [   32.448682] ttyS2: detected caps 00000700 should be 00000100
> [   32.454929] 0000:06:02.0: ttyS2 at I/O 0x1068 (irq = 18) is a
> 16C950/954
>
> Note that the only port actually connected to the single connecter is
> ttyS0 at 0x1060.  I can successfully use this as the Linux serial
> console by adding the Linux boot parameters:
>
> console=uart,io,0x1060,115200n8
>
> However, I'm having problems trying to get it to work as a Xen
> console.  If I add:
>
> com1=115200,8n1,0x1060,0 console=vga,com1
>
> to Xen, I do get some output to the port, but all the characters look
> like this:
>
> .<.....~.o....¼..4.|.a.½¬o.§¼4.#.ÿ.......ö4..¬.... 4.  .
> 4Ä...T.Ä ..¼.Ä ....<.
>
> Can anyone help me to get this to work?
>
> Thanks,
> Nigel
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