debug-pxa250.c

PXA250上的XBOOT

/* 
 * $Id: debug-pxa250.c,v 1.2 2003/06/04 10:11:38 telka Exp $
 *
 * Copyright (C) 2001, 2002 ETC s.r.o.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * Written by Marcel Telka <[e-mail]>, 2001, 2002.
 *
 */

#include "board.h"

#if CPU == PXA250

#include <_windows.h>
#include <nkintr.h>

#include <pxa2x0/uart.h>
#include <pxa2x0/gpio.h>

#include "debug.h"

#define	NONE	0
#define	FFUART	1
#define	BTUART	2
#define	STUART	3

/* select debug port */
#define	DEBUG_PORT	BTUART

/* Pointer to UART registers */
#if DEBUG_PORT == FFUART
#	define	UART_pointer	FFUART_pointer
#endif
#if DEBUG_PORT == BTUART
#	define	UART_pointer	BTUART_pointer
#endif
#if DEBUG_PORT == STUART
#	define	UART_pointer	STUART_pointer
#endif

/* wait for transmit all data in tx FIFO through debug serial port */
void
OEMFlushDebugSerial( void )
{
#if DEBUG_PORT != NONE
	/* TODO */
#endif /* DEBUG_PORT != NONE */
}

void
OEMInitDebugSerial( void )
{
#if DEBUG_PORT != NONE

#if DEBUG_PORT == FFUART
	GPDR1 = GPIO1_GP39;
	GAFR1_L = GAFR1_L_AF34( ALT_FN_1_IN ) | GAFR1_L_AF39( ALT_FN_2_OUT );
#endif /* DEBUG_PORT == FFUART */

#if DEBUG_PORT == BTUART
	GPDR1 = GPIO1_GP43;
	GAFR1_L = GAFR1_L_AF42( ALT_FN_1_IN ) | GAFR1_L_AF43( ALT_FN_2_OUT );
#endif /* DEBUG_PORT == BTUART */

#if DEBUG_PORT == STUART
	GPDR1 = GPIO1_GP47;
	GAFR1_L = GAFR1_L_AF46( ALT_FN_2_IN ) | GAFR1_L_AF47( ALT_FN_1_OUT );
#endif /* DEBUG_PORT == STUART */

	LCR = LCR_DLAB;
	DLL = 0x08;
	LCR = LCR_WLS(3);
	IER = IER_UUE;
	FCR = FCR_TRFIFOE;

#endif /* DEBUG_PORT != NONE */
}

void
OEMDeinitDebugSerial( void )
{
#if (DEBUG_PORT != NONE)
	/* TODO */
#endif /* (DEBUG_PORT != NONE) */
}

void
OEMWriteDebugByte( BYTE ch )
{
#if (DEBUG_PORT != NONE)
	while (!(LSR & LSR_TDRQ)) ;
	THR = ch;
#endif /* (DEBUG_PORT != NONE) */
}

int
OEMReadDebugByte( void )
{
#if (DEBUG_PORT != NONE)
	if (LSR & (LSR_FIFOE | LSR_BI | LSR_FE | LSR_PE | LSR_OE) )
		return OEM_DEBUG_COM_ERROR;
	if (LSR & LSR_DR)
		return RBR;
	return OEM_DEBUG_READ_NODATA;
#else /* (DEBUG_PORT != NONE) */
	return OEM_DEBUG_READ_NODATA;
#endif /* (DEBUG_PORT != NONE) */
}

#endif /* CPU == PXA250 */