Subversion Repositories openrisc_2011-10-31

/* ----------------------------------------------------------------------------

 *         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 "supc.h"

#include <board.h>

#include <utility/assert.h>

//------------------------------------------------------------------------------

//         Local definitions

//------------------------------------------------------------------------------

/// Key value for the SUPC_MR register.

#define SUPC_KEY            ((unsigned int) (0xA5 << 24))

//------------------------------------------------------------------------------

//         Global functions

//------------------------------------------------------------------------------

//------------------------------------------------------------------------------

/// Enables the SLCD power supply.

/// \param internal  If 1, the power supply is configured as internal; otherwise

///                  it is set at external.

//------------------------------------------------------------------------------

void SUPC_EnableSlcd(unsigned char internal)

{

    if (internal) {

         AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_LCDMODE) | AT91C_SUPC_LCDMODE_INTERNAL;

    }

    else {

        AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_LCDMODE) | AT91C_SUPC_LCDMODE_EXTERNAL;

    }

    while ((AT91C_BASE_SUPC->SUPC_SR & AT91C_SUPC_LCDS) != AT91C_SUPC_LCDS);

}

//------------------------------------------------------------------------------

/// Disables the SLCD power supply.

//------------------------------------------------------------------------------

void SUPC_DisableSlcd(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_LCDMODE);

    while ((AT91C_BASE_SUPC->SUPC_SR & AT91C_SUPC_LCDS) == AT91C_SUPC_LCDS);

}

//------------------------------------------------------------------------------

/// Sets the output voltage of the SLCD charge pump.

/// \param voltage  Output voltage.

//------------------------------------------------------------------------------

void SUPC_SetSlcdVoltage(unsigned int voltage)

{

    SANITY_CHECK((voltage & ~AT91C_SUPC_LCDOUT) == 0);

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_LCDOUT) | voltage;

}

#if !defined(__ICCARM__)

__attribute__ ((section (".ramfunc"))) // GCC

#endif

//------------------------------------------------------------------------------

/// Enables the flash power supply with the given wake-up setting.

/// \param time  Wake-up time.

//------------------------------------------------------------------------------

void SUPC_EnableFlash(unsigned int time)

{

    AT91C_BASE_SUPC->SUPC_FWUTR = time;

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | AT91C_BASE_SUPC->SUPC_MR | AT91C_SUPC_FLASHON;

    while ((AT91C_BASE_SUPC->SUPC_SR & AT91C_SUPC_FLASHS) != AT91C_SUPC_FLASHS);

}

#if !defined(__ICCARM__)

__attribute__ ((section (".ramfunc"))) // GCC

#endif

//------------------------------------------------------------------------------

/// Disables the flash power supply.

//------------------------------------------------------------------------------

void SUPC_DisableFlash(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_FLASHON);

    while ((AT91C_BASE_SUPC->SUPC_SR & AT91C_SUPC_FLASHS) == AT91C_SUPC_FLASHS);

}

//------------------------------------------------------------------------------

/// Sets the voltage regulator output voltage.

/// \param voltage  Voltage to set.

//------------------------------------------------------------------------------

void SUPC_SetVoltageOutput(unsigned int voltage)

{

    SANITY_CHECK((voltage & ~AT91C_SUPC_VRVDD) == 0);

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_VRVDD) | voltage;

}

//------------------------------------------------------------------------------

/// Puts the voltage regulator in deep mode.

//------------------------------------------------------------------------------

void SUPC_EnableDeepMode(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | AT91C_BASE_SUPC->SUPC_MR | AT91C_SUPC_VRDEEP;

}

//------------------------------------------------------------------------------

/// Puts the voltage regulator in normal mode.

//------------------------------------------------------------------------------

void SUPC_DisableDeepMode(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_VRDEEP);

}

//-----------------------------------------------------------------------------

/// Enables the backup SRAM power supply, so its data is saved while the device

/// is in backup mode.

//-----------------------------------------------------------------------------

void SUPC_EnableSram(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | AT91C_BASE_SUPC->SUPC_MR | AT91C_SUPC_SRAMON;

}

//-----------------------------------------------------------------------------

/// Disables the backup SRAM power supply.

//-----------------------------------------------------------------------------

void SUPC_DisableSram(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_SRAMON);

}

//-----------------------------------------------------------------------------

/// Enables the RTC power supply.

//-----------------------------------------------------------------------------

void SUPC_EnableRtc(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | AT91C_BASE_SUPC->SUPC_MR | AT91C_SUPC_RTCON;

    while ((AT91C_BASE_SUPC->SUPC_SR & AT91C_SUPC_RTS) != AT91C_SUPC_RTS);

}

//-----------------------------------------------------------------------------

/// Disables the RTC power supply.

//-----------------------------------------------------------------------------

void SUPC_DisableRtc(void)

{

    AT91C_BASE_SUPC->SUPC_MR = SUPC_KEY | (AT91C_BASE_SUPC->SUPC_MR & ~AT91C_SUPC_RTCON);

    while ((AT91C_BASE_SUPC->SUPC_SR & AT91C_SUPC_RTS) == AT91C_SUPC_RTS);

}

//-----------------------------------------------------------------------------

/// Sets the BOD sampling mode (or disables it).

/// \param mode  BOD sampling mode.

//-----------------------------------------------------------------------------

void SUPC_SetBodSampling(unsigned int mode)

{

    SANITY_CHECK((mode & ~AT91C_SUPC_BODSMPL) == 0);

    AT91C_BASE_SUPC->SUPC_BOMR &= ~AT91C_SUPC_BODSMPL;

    AT91C_BASE_SUPC->SUPC_BOMR |= mode;

}

//------------------------------------------------------------------------------

/// Disables the voltage regulator, which makes the device enter backup mode.

//------------------------------------------------------------------------------

void SUPC_DisableVoltageRegulator(void)

{

    AT91C_BASE_SUPC->SUPC_CR = SUPC_KEY | AT91C_SUPC_VROFF;

    while (1);

}

//------------------------------------------------------------------------------

/// Shuts the device down so it enters Off mode.

//------------------------------------------------------------------------------

void SUPC_Shutdown(void)

{

    AT91C_BASE_SUPC->SUPC_CR = SUPC_KEY | AT91C_SUPC_SHDW;

    while (1);

}

//------------------------------------------------------------------------------

/// Sets the wake-up sources when in backup mode.

/// \param sources  Wake-up sources to enable.

//------------------------------------------------------------------------------

void SUPC_SetWakeUpSources(unsigned int sources)

{

    SANITY_CHECK((sources & ~0x0000000B) == 0);

    AT91C_BASE_SUPC->SUPC_WUMR &= ~0x0000000B;

    AT91C_BASE_SUPC->SUPC_WUMR |= sources;

}

//------------------------------------------------------------------------------

/// Sets the wake-up inputs when in backup mode.

/// \param inputs  Wake up inputs to enable.

//------------------------------------------------------------------------------

void SUPC_SetWakeUpInputs(unsigned int inputs)

{

    SANITY_CHECK((inputs & ~0xFFFF) == 0);

    AT91C_BASE_SUPC->SUPC_WUIR &= ~0xFFFF;

    AT91C_BASE_SUPC->SUPC_WUIR |= inputs;

}