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