/* scp.c - TI LM3S6965 System Control Peripherals interface */

/*
 * Copyright (c) 2013-2014 Wind River Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1) Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2) Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3) Neither the name of Wind River Systems nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
DESCRIPTION

Library for controlling target-specific devices present in the 0x400fe000
peripherals memory region.

Currently, only enabling the main OSC with default value is implemented.
*/

#include <stdint.h>
#include <toolchain.h>
#include <sections.h>

#include "scp.h"

/* System Control Peripheral (SCP) Registers */

volatile struct __scp __scp_section __scp;

/*******************************************************************************
*
* _ScpMainOscEnable - enable main oscillator with default frequency of 6MHz
*
* RETURNS: N/A
*/
void _ScpMainOscEnable(void)
{
	union __rcc reg;

	reg.value = __scp.clock.rcc.value;
	reg.bit.moscdis = 0;
	reg.bit.oscsrc = _SCP_OSC_SOURCE_MAIN;
	reg.bit.xtal = _SCP_CRYSTAL_6MHZ;

	__scp.clock.rcc.value = reg.value;
}