[mirror_ubuntu-artful-kernel.git] / arch / ppc / boot / simple / uartlite_tty.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))

unsigned long
serial_init(int chan, void *ignored)
{
	/* Clear the RX FIFO */
	out_be32(UARTLITE_BASEADDR + 0x0C, 0x2);
	return 0;
}

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);
}
Commit	Line	Data
8b01653a GL	1	/*
	2	* Xilinx UARTLITE bootloader driver
	3	*
	4	* Copyright (c) 2007 Secret Lab Technologies Ltd.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*/
	11
	12	#include <linux/types.h>
	13	#include <asm/serial.h>
	14	#include <asm/io.h>
	15	#include <platforms/4xx/xparameters/xparameters.h>
	16
	17	#define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR))
	18
bedfc8a0 GL	19	unsigned long
	20	serial_init(int chan, void *ignored)
	21	{
	22	/* Clear the RX FIFO */
	23	out_be32(UARTLITE_BASEADDR + 0x0C, 0x2);
	24	return 0;
	25	}
	26
8b01653a GL	27	void
	28	serial_putc(unsigned long com_port, unsigned char c)
	29	{
	30	while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x08) != 0); /* spin */
	31	out_be32(UARTLITE_BASEADDR + 0x4, c);
	32	}
	33
	34	unsigned char
	35	serial_getc(unsigned long com_port)
	36	{
	37	while ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) == 0); /* spin */
	38	return in_be32(UARTLITE_BASEADDR);
	39	}
	40
	41	int
	42	serial_tstc(unsigned long com_port)
	43	{
	44	return ((in_be32(UARTLITE_BASEADDR + 0x8) & 0x01) != 0);
	45	}