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    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.
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