38 lines
975 B
C
38 lines
975 B
C
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/*
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* Xilinx UARTLITE bootloader driver
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*
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* Copyright (c) 2007 Secret Lab Technologies Ltd.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/types.h>
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#include <asm/serial.h>
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#include <asm/io.h>
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#include <platforms/4xx/xparameters/xparameters.h>
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#define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR))
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void
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serial_putc(unsigned long com_port, unsigned char c)
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{
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while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x08) != 0); /* spin */
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out_be32(UARTLITE_BASEADDR + 0x4, c);
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}
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unsigned char
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serial_getc(unsigned long com_port)
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{
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while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) == 0); /* spin */
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return in_be32(UARTLITE_BASEADDR);
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}
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int
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serial_tstc(unsigned long com_port)
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{
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return ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) != 0);
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}
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