hw_tulip_reset.c

QNX ADS BSP code for i.MX27 chips

/*
 * $QNXLicenseC: 
 * Copyright 2007, QNX Software Systems.  
 *  
 * Licensed under the Apache License, Version 2.0 (the "License"). You  
 * may not reproduce, modify or distribute this software except in  
 * compliance with the License. You may obtain a copy of the License  
 * at: http://www.apache.org/licenses/LICENSE-2.0  
 *  
 * Unless required by applicable law or agreed to in writing, software  
 * distributed under the License is distributed on an "AS IS" basis,  
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied. 
 * 
 * This file may contain contributions from others, either as  
 * contributors under the License or as licensors under other terms.   
 * Please review this entire file for other proprietary rights or license  
 * notices, as well as the QNX Development Suite License Guide at  
 * http://licensing.qnx.com/license-guide/ for other information. 
 * $
 */
 
 #include "startup.h"

//
// Make sure the ethernet isn't generating any interrupts or receiving
// data.
//

#define	DEC_CSR0			0x00	/* Bus Mode */
	#define	CSR0_SW_RESET	(1<<0)
#define	DEC_CSR6	0x30	/* Operation Mode */
	#define	CSR6_START_TX	(1<<13)
	#define	CSR6_START_RX	(1<<1)
#define	DEC_CSR7			0x38	/* Interrupt Enable */

void
tulip_reset(paddr_t base, int mem_mapped) {
	uintptr_t IoBase;

	IoBase = startup_io_map(0x100, base);

	/* Stop Board */
	out32(IoBase + DEC_CSR6, in32(IoBase + DEC_CSR6) &
	    ~(CSR6_START_TX | CSR6_START_RX));

	/* Disable Interrupts + Reset Board */
	out32(IoBase + DEC_CSR7, 0);
	out32(IoBase + DEC_CSR0, CSR0_SW_RESET);

	startup_io_unmap(IoBase);
}