lkml.org 
[lkml]   [2005]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Bug in 8520.c - port.type not set for serial console
Date
On Monday 30 May 2005 4:38 pm, Jim Ramsay wrote:
> I am attempting to get the 8520.c driver's serial console working with
> a 16550A UART implementation, and have run into what I consider to be
> a bug: In short, the proper 'port.type' for this serial port is not
> set until the module init (serial8250_init) is called, so the FCR is
> set incorrectly during serial8250_console_init for any port type which
> is different than UNKNOWN.
>
> The exact problem is that the FCR is being set to '0x0' for a port
> type of 'UNKNOWN', when for my specific 16550A, it should be set to
> '0xC1' - and this makes my screen fill with empty characters instead
> of the printk output I need.

Shouldn't a 16550A UART work correctly with FCR==0x0, i.e., with FIFOs
disabled? Is your UART broken?

Serial console output is always polled, one character at a time, so
you shouldn't need FIFOs until later.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-06-01 00:33    [from the cache]
©2003-2011 Jasper Spaans