summaryrefslogtreecommitdiffstats
path: root/arch/ppc/boot/simple/uartlite_tty.c
blob: 0eae1eab38d48b5bf07eb980d35ccb46dd8c226d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
/*
 * 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);
}
OpenPOWER on IntegriCloud