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.

 * ----------------------------------------------------------------------------

 */

#ifndef trace_LEVEL

    #define trace_LEVEL trace_INFO

#endif

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

//         Headers

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

#include "eefc.h"

#ifdef BOARD_FLASH_EEFC

#include <utility/assert.h>

#include <utility/trace.h>

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

//         Global functions

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

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

/// Enables the flash ready interrupt source on the EEFC peripheral.

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

void EFC_EnableFrdyIt(void)

{

    AT91C_BASE_EFC->EFC_FMR |= AT91C_EFC_FRDY;

}

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

/// Disables the flash ready interrupt source on the EEFC peripheral.

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

void EFC_DisableFrdyIt(void)

{

    AT91C_BASE_EFC->EFC_FMR &= ~AT91C_EFC_FRDY;

}

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

/// Translates the given address page and offset values. The resulting

/// values are stored in the provided variables if they are not null.

/// \param address  Address to translate.

/// \param pPage  First page accessed.

/// \param pOffset  Byte offset in first page.

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

void EFC_TranslateAddress(

    unsigned int address,

    unsigned short *pPage,

    unsigned short *pOffset)

{

    unsigned short page;

    unsigned short offset;

    SANITY_CHECK(address >= AT91C_IFLASH);

    SANITY_CHECK(address <= (AT91C_IFLASH + AT91C_IFLASH_SIZE));

    // Calculate page & offset

    page = (address - AT91C_IFLASH) / AT91C_IFLASH_PAGE_SIZE;

    offset = (address - AT91C_IFLASH) % AT91C_IFLASH_PAGE_SIZE;

    trace_LOG(trace_DEBUG,

              "-D- Translated 0x%08X to page=%d and offset=%d\n\r",

              address, page, offset);

    // Store values

    if (pPage) {

        *pPage = page;

    }

    if (pOffset) {

        *pOffset = offset;

    }

}

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

/// Computes the address of a flash access given the page and offset.

/// \param page  Page number.

/// \param offset  Byte offset inside page.

/// \param pAddress  Computed address (optional).

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

void EFC_ComputeAddress(

    unsigned short page,

    unsigned short offset,

    unsigned int *pAddress)

{

    unsigned int address;

    SANITY_CHECK(page <= AT91C_IFLASH_NB_OF_PAGES);

    SANITY_CHECK(offset < AT91C_IFLASH_PAGE_SIZE);

    // Compute address

    address = AT91C_IFLASH + page * AT91C_IFLASH_PAGE_SIZE + offset;

    // Store result

    if (pAddress) {

        *pAddress = address;

    }

}

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

/// Starts the executing the given command on the EEFC. This function returns

/// as soon as the command is started. It does NOT set the FMCN field automatically.

/// \param command  Command to execute.

/// \param argument  Command argument (should be 0 if not used).

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

void EFC_StartCommand(unsigned char command, unsigned short argument)

{

    // Check command & argument

    switch (command) {

        case AT91C_EFC_FCMD_WP:

        case AT91C_EFC_FCMD_WPL:

        case AT91C_EFC_FCMD_EWP:

        case AT91C_EFC_FCMD_EWPL:

        case AT91C_EFC_FCMD_EPL:

        case AT91C_EFC_FCMD_EPA:

        case AT91C_EFC_FCMD_SLB:

        case AT91C_EFC_FCMD_CLB:

            ASSERT(argument < AT91C_IFLASH_NB_OF_PAGES,

                   "-F- Embedded flash has only %d pages\n\r",

                   AT91C_IFLASH_NB_OF_PAGES);

            break;

        case AT91C_EFC_FCMD_SFB:

        case AT91C_EFC_FCMD_CFB:

            ASSERT(argument < EFC_NUM_GPNVMS, "-F- Embedded flash has only %d GPNVMs\n\r", EFC_NUM_GPNVMS);

            break;

        case AT91C_EFC_FCMD_GETD:

        case AT91C_EFC_FCMD_EA:

        case AT91C_EFC_FCMD_GLB:

        case AT91C_EFC_FCMD_GFB:

            ASSERT(argument == 0, "-F- Argument is meaningless for the given command.\n\r");

            break;

        default: ASSERT(0, "-F- Unknown command %d\n\r", command);

    }

    // Start commandEmbedded flash 

    ASSERT((AT91C_BASE_EFC->EFC_FSR & AT91C_EFC_FRDY) == AT91C_EFC_FRDY, "-F- EEFC is not ready\n\r");

    AT91C_BASE_EFC->EFC_FCR = (0x5A << 24) | (argument << 8) | command;

}

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

/// Performs the given command and wait until its completion (or an error).

/// Returns 0 if successful; otherwise returns an error code.

/// \param command  Command to perform.

/// \param argument  Optional command argument.

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

#ifdef __ICCARM__

__ramfunc

#else

__attribute__ ((section (".ramfunc")))

#endif

unsigned char EFC_PerformCommand(unsigned char command, unsigned short argument)

{

    unsigned int status;

#ifdef BOARD_FLASH_IAP_ADDRESS

    // Pointer on IAP function in ROM

    static void (*IAP_PerformCommand)(unsigned int);

    IAP_PerformCommand = (void (*)(unsigned int)) *((unsigned int *) BOARD_FLASH_IAP_ADDRESS);

    // Check if IAP function is implemented (opcode in SWI != 'b' or 'ldr') */

    if ((((((unsigned long) IAP_PerformCommand >> 24) & 0xFF) != 0xEA) &&

        (((unsigned long) IAP_PerformCommand >> 24) & 0xFF) != 0xE5)) {

        IAP_PerformCommand((0x5A << 24) | (argument << 8) | command);

        return (AT91C_BASE_EFC->EFC_FSR & (AT91C_EFC_LOCKE | AT91C_EFC_FCMDE));

    }

#endif

    AT91C_BASE_EFC->EFC_FCR = (0x5A << 24) | (argument << 8) | command;

    do {

        status = AT91C_BASE_EFC->EFC_FSR;

    }

    while ((status & AT91C_EFC_FRDY) != AT91C_EFC_FRDY);

    return (status & (AT91C_EFC_LOCKE | AT91C_EFC_FCMDE));

}

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

/// Returns the current status of the EEFC. Keep in mind that this function clears

/// the value of some status bits (LOCKE, PROGE).

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

unsigned int EFC_GetStatus(void)

{

    return AT91C_BASE_EFC->EFC_FSR;

}

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

/// Returns the result of the last executed command.

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

unsigned int EFC_GetResult(void) {

    return AT91C_BASE_EFC->EFC_FRR;

}

#endif //#ifdef BOARD_FLASH_EEFC