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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "pmc.h"
#include <board.h>
#include <utility/assert.h>
#include <utility/trace.h>
#ifdef CP15_PRESENT
#include <cp15/cp15.h>
#endif
#define MASK_STATUS 0x3FFFFFFC
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
#if defined(at91sam7l64) || defined(at91sam7l128)
//------------------------------------------------------------------------------
/// Sets the fast wake-up inputs that can get the device out of Wait mode.
/// \param inputs Fast wake-up inputs to enable.
//------------------------------------------------------------------------------
void PMC_SetFastWakeUpInputs(unsigned int inputs)
{
SANITY_CHECK((inputs & ~0xFF) == 0);
AT91C_BASE_PMC->PMC_FSMR = inputs;
}
#if !defined(__ICCARM__)
__attribute__ ((section (".ramfunc"))) // GCC
#endif
//------------------------------------------------------------------------------
/// Disables the main oscillator, making the device enter Wait mode.
//------------------------------------------------------------------------------
void PMC_DisableMainOscillatorForWaitMode(void)
{
AT91C_BASE_PMC->PMC_MOR = 0x37 << 16;
while ((AT91C_BASE_PMC->PMC_MOR & AT91C_PMC_MAINSELS) != AT91C_PMC_MAINSELS);
}
#endif
#if defined(at91sam7l)
//------------------------------------------------------------------------------
/// Disables the main oscillator when NOT running on it.
//------------------------------------------------------------------------------
void PMC_DisableMainOscillator(void)
{
AT91C_BASE_PMC->PMC_MOR = 0x37 << 16;
while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MAINSELS) == AT91C_PMC_MAINSELS);
}
#endif
//------------------------------------------------------------------------------
/// Disables the processor clock
//------------------------------------------------------------------------------
void PMC_DisableProcessorClock(void)
{
AT91C_BASE_PMC->PMC_SCDR = AT91C_PMC_PCK;
while ((AT91C_BASE_PMC->PMC_SCSR & AT91C_PMC_PCK) != AT91C_PMC_PCK);
}
//------------------------------------------------------------------------------
/// Enables the clock of a peripheral. The peripheral ID (AT91C_ID_xxx) is used
/// to identify which peripheral is targetted.
/// Note that the ID must NOT be shifted (i.e. 1 << AT91C_ID_xxx).
/// \param id Peripheral ID (AT91C_ID_xxx).
//------------------------------------------------------------------------------
void PMC_EnablePeripheral(unsigned int id)
{
SANITY_CHECK(id < 32);
if ((AT91C_BASE_PMC->PMC_PCSR & (1 << id)) == (1 << id)) {
TRACE_INFO("PMC_EnablePeripheral: clock of peripheral"
" %u is already enabled\n\r",
id);
}
else {
AT91C_BASE_PMC->PMC_PCER = 1 << id;
}
}
//------------------------------------------------------------------------------
/// Disables the clock of a peripheral. The peripheral ID (AT91C_ID_xxx) is used
/// to identify which peripheral is targetted.
/// Note that the ID must NOT be shifted (i.e. 1 << AT91C_ID_xxx).
/// \param id Peripheral ID (AT91C_ID_xxx).
//------------------------------------------------------------------------------
void PMC_DisablePeripheral(unsigned int id)
{
SANITY_CHECK(id < 32);
if ((AT91C_BASE_PMC->PMC_PCSR & (1 << id)) != (1 << id)) {
TRACE_INFO("PMC_DisablePeripheral: clock of peripheral"
" %u is not enabled\n\r",
id);
}
else {
AT91C_BASE_PMC->PMC_PCDR = 1 << id;
}
}
//------------------------------------------------------------------------------
/// Enable all the periph clock via PMC
/// (Becareful of the last 2 bits, it is not periph clock)
//------------------------------------------------------------------------------
void PMC_EnableAllPeripherals(void)
{
AT91C_BASE_PMC->PMC_PCER = MASK_STATUS;
while( (AT91C_BASE_PMC->PMC_PCSR & MASK_STATUS) != MASK_STATUS);
TRACE_INFO("Enable all periph clocks\n\r");
}
//------------------------------------------------------------------------------
/// Disable all the periph clock via PMC
/// (Becareful of the last 2 bits, it is not periph clock)
//------------------------------------------------------------------------------
void PMC_DisableAllPeripherals(void)
{
AT91C_BASE_PMC->PMC_PCDR = MASK_STATUS;
while((AT91C_BASE_PMC->PMC_PCSR & MASK_STATUS) != 0);
TRACE_INFO("Disable all periph clocks\n\r");
}
//-----------------------------------------------------------------------------
/// Get Periph Status
//-----------------------------------------------------------------------------
unsigned int PMC_IsAllPeriphEnabled(void)
{
return (AT91C_BASE_PMC->PMC_PCSR == MASK_STATUS);
}
//-----------------------------------------------------------------------------
/// Get Periph Status
//-----------------------------------------------------------------------------
unsigned int PMC_IsPeriphEnabled(unsigned int id)
{
return (AT91C_BASE_PMC->PMC_PCSR & (1 << id));
}
//------------------------------------------------------------------------------
/// Put the CPU in Idle Mode for lower consumption
//------------------------------------------------------------------------------
void PMC_CPUInIdleMode(void)
{
PMC_DisableProcessorClock();
#ifdef CP15_PRESENT
_waitForInterrupt();
#endif
}
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