MCF8252 UART using interrupts for Rx

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       From: Victor Remete <[email protected]>
         To: [email protected]
    Subject: MCF8252 UART using interrupts for Rx

    I would like to use the UARTs in the MCF8252 using interrupts.
    How do I program the UART for reception so that I get an interrupt
    1. when the Rx FIFO is 3/4 full (trigger level), or
    2. if no character is received for N character times (timeout,
	  where N=4 in the National Semiconduction NS16550, but I am
        not picky on the value of N as long as it is 2 or more).

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