EBIKE-FreeRTOS/Common/drivers/Atmel/at91lib/peripherals/efc/efc.c

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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.
* ----------------------------------------------------------------------------
*/
#ifndef trace_LEVEL
#define trace_LEVEL trace_INFO
#endif
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "efc.h"
#ifdef BOARD_FLASH_EFC
#include <utility/assert.h>
#include <utility/trace.h>
//------------------------------------------------------------------------------
// Local definitions
//------------------------------------------------------------------------------
// Round a number to the nearest integral value (number must have been
// multiplied by 10, e.g. to round 10.3 enter 103).
#define ROUND(n) ((((n) % 10) >= 5) ? (((n) / 10) + 1) : ((n) / 10))
// Returns the FMCN field value when manipulating lock bits, given MCK.
#if defined(at91sam7a3)
#define FMCN_BITS(mck) (ROUND((mck) / 100000) << 16) // <- Not correct according to the datasheet but it works
#else
#define FMCN_BITS(mck) (ROUND((mck) / 100000) << 16)
#endif
// Returns the FMCN field value when manipulating the rest of the flash.
#define FMCN_FLASH(mck) ((((mck) / 2000000) * 3) << 16)
//------------------------------------------------------------------------------
// Local functions
//------------------------------------------------------------------------------
/// Master clock frequency, used to infer the value of the FMCN field.
static unsigned int lMck;
/// Calculated value of the FMCN field base on Master clock frequency.
static unsigned int lMckFMCN;
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Sets the system master clock so the FMCN field of the EFC(s) can be
/// programmed properly.
/// \param mck Master clock frequency in Hz.
//------------------------------------------------------------------------------
void EFC_SetMasterClock(unsigned int mck)
{
lMck = mck;
lMckFMCN = FMCN_BITS(lMck);
}
//------------------------------------------------------------------------------
/// Enables the given interrupt sources on an EFC peripheral.
/// \param pEfc Pointer to an AT91S_EFC structure.
/// \param sources Interrupt sources to enable.
//------------------------------------------------------------------------------
void EFC_EnableIt(AT91S_EFC *pEfc, unsigned int sources)
{
SANITY_CHECK(pEfc);
SANITY_CHECK((sources & ~0x0000000D) == 0);
pEfc->EFC_FMR |= sources;
}
//------------------------------------------------------------------------------
/// Disables the given interrupt sources on an EFC peripheral.
/// \param pEfc Pointer to an AT91S_EFC structure.
/// \param sources Interrupt sources to disable.
//------------------------------------------------------------------------------
void EFC_DisableIt(AT91S_EFC *pEfc, unsigned int sources)
{
SANITY_CHECK(pEfc);
SANITY_CHECK((sources & ~(AT91C_MC_FRDY | AT91C_MC_LOCKE | AT91C_MC_PROGE)) == 0);
pEfc->EFC_FMR &= ~sources;
}
//------------------------------------------------------------------------------
/// Enables or disable the "Erase before programming" feature of an EFC.
/// \param pEfc Pointer to an AT91S_EFC structure.
/// \param enable If 1, the feature is enabled; otherwise it is disabled.
//------------------------------------------------------------------------------
void EFC_SetEraseBeforeProgramming(AT91S_EFC *pEfc, unsigned char enable)
{
SANITY_CHECK(pEfc);
if (enable) {
pEfc->EFC_FMR &= ~AT91C_MC_NEBP;
}
else {
pEfc->EFC_FMR |= AT91C_MC_NEBP;
}
}
//------------------------------------------------------------------------------
/// Translates the given address into EFC, page and offset values. The resulting
/// values are stored in the provided variables if they are not null.
/// \param address Address to translate.
/// \param ppEfc Pointer to target EFC peripheral.
/// \param pPage First page accessed.
/// \param pOffset Byte offset in first page.
//------------------------------------------------------------------------------
void EFC_TranslateAddress(
unsigned int address,
AT91S_EFC **ppEfc,
unsigned short *pPage,
unsigned short *pOffset)
{
AT91S_EFC *pEfc;
unsigned short page;
unsigned short offset;
SANITY_CHECK(address >= AT91C_IFLASH);
SANITY_CHECK(address <= (AT91C_IFLASH + AT91C_IFLASH_SIZE));
#if defined(AT91C_BASE_EFC0)
if (address >= (AT91C_IFLASH + AT91C_IFLASH_SIZE / 2)) {
pEfc = AT91C_BASE_EFC1;
page = (address - AT91C_IFLASH - AT91C_IFLASH_SIZE / 2) / AT91C_IFLASH_PAGE_SIZE;
offset = (address - AT91C_IFLASH - AT91C_IFLASH_SIZE / 2) % AT91C_IFLASH_PAGE_SIZE;
}
else {
pEfc = AT91C_BASE_EFC0;
page = (address - AT91C_IFLASH) / AT91C_IFLASH_PAGE_SIZE;
offset = (address - AT91C_IFLASH) % AT91C_IFLASH_PAGE_SIZE;
}
#else
pEfc = AT91C_BASE_EFC;
page = (address - AT91C_IFLASH) / AT91C_IFLASH_PAGE_SIZE;
offset = (address - AT91C_IFLASH) % AT91C_IFLASH_PAGE_SIZE;
#endif
trace_LOG(trace_DEBUG,
"-D- Translated 0x%08X to EFC=0x%08X, page=%d and offset=%d\n\r",
address, (unsigned int) pEfc, page, offset);
// Store values
if (ppEfc) {
*ppEfc = pEfc;
}
if (pPage) {
*pPage = page;
}
if (pOffset) {
*pOffset = offset;
}
}
//------------------------------------------------------------------------------
/// Computes the address of a flash access given the EFC, page and offset.
/// \param pEfc Pointer to an AT91S_EFC structure.
/// \param page Page number.
/// \param offset Byte offset inside page.
/// \param pAddress Computed address (optional).
//------------------------------------------------------------------------------
void EFC_ComputeAddress(
AT91S_EFC *pEfc,
unsigned short page,
unsigned short offset,
unsigned int *pAddress)
{
unsigned int address;
SANITY_CHECK(pEfc);
#if defined(AT91C_BASE_EFC1)
SANITY_CHECK(page <= (AT91C_IFLASH_NB_OF_PAGES / 2));
#else
SANITY_CHECK(page <= AT91C_IFLASH_NB_OF_PAGES);
#endif
SANITY_CHECK(offset < AT91C_IFLASH_PAGE_SIZE);
// Compute address
address = AT91C_IFLASH + page * AT91C_IFLASH_PAGE_SIZE + offset;
#if defined(AT91C_BASE_EFC1)
if (pEfc == AT91C_BASE_EFC1) {
address += AT91C_IFLASH_SIZE / 2;
}
#endif
// Store result
if (pAddress) {
*pAddress = address;
}
}
//------------------------------------------------------------------------------
/// Starts the executing the given command on an EFC. This function returns
/// as soon as the command is started. It does NOT set the FMCN field automatically.
/// \param pEfc Pointer to an AT91S_EFC structure.
/// \param command Command to execute.
/// \param argument Command argument (should be 0 if not used).
//------------------------------------------------------------------------------
void EFC_StartCommand(
AT91S_EFC *pEfc,
unsigned char command,
unsigned short argument)
{
SANITY_CHECK(pEfc);
ASSERT(lMck != 0, "-F- Master clock not set.\n\r");
// Check command & argument
switch (command) {
case AT91C_MC_FCMD_PROG_AND_LOCK:
ASSERT(0, "-F- Write and lock command cannot be carried out.\n\r");
break;
case AT91C_MC_FCMD_START_PROG:
case AT91C_MC_FCMD_LOCK:
case AT91C_MC_FCMD_UNLOCK:
ASSERT(argument < AT91C_IFLASH_NB_OF_PAGES,
"-F- Maximum number of pages is %d (argument was %d)\n\r",
AT91C_IFLASH_NB_OF_PAGES,
argument);
break;
#if (EFC_NUM_GPNVMS > 0)
case AT91C_MC_FCMD_SET_GP_NVM:
case AT91C_MC_FCMD_CLR_GP_NVM:
ASSERT(argument < EFC_NUM_GPNVMS, "-F- A maximum of %d GPNVMs are available on the chip.\n\r", EFC_NUM_GPNVMS);
break;
#endif
case AT91C_MC_FCMD_ERASE_ALL:
#if !defined(EFC_NO_SECURITY_BIT)
case AT91C_MC_FCMD_SET_SECURITY:
#endif
ASSERT(argument == 0, "-F- Argument is meaningless for the given command\n\r");
break;
default: ASSERT(0, "-F- Unknown command %d\n\r", command);
}
// Set FMCN
switch (command) {
case AT91C_MC_FCMD_LOCK:
case AT91C_MC_FCMD_UNLOCK:
#if (EFC_NUM_GPNVMS > 0)
case AT91C_MC_FCMD_SET_GP_NVM:
case AT91C_MC_FCMD_CLR_GP_NVM:
#endif
#if !defined(EFC_NO_SECURITY_BIT)
case AT91C_MC_FCMD_SET_SECURITY:
#endif
pEfc->EFC_FMR = (pEfc->EFC_FMR & ~AT91C_MC_FMCN) | lMckFMCN;
break;
case AT91C_MC_FCMD_START_PROG:
case AT91C_MC_FCMD_ERASE_ALL:
pEfc->EFC_FMR = (pEfc->EFC_FMR & ~AT91C_MC_FMCN) | lMckFMCN;
break;
}
// Start command
ASSERT((pEfc->EFC_FSR & AT91C_MC_FRDY) != 0, "-F- Efc is not ready\n\r");
pEfc->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 pEfc Pointer to an AT91S_EFC structure.
/// \param command Command to perform.
/// \param argument Optional command argument.
//------------------------------------------------------------------------------
#ifdef __ICCARM__
__ramfunc
#else
__attribute__ ((section (".ramfunc")))
#endif
unsigned char EFC_PerformCommand(
AT91S_EFC *pEfc,
unsigned char command,
unsigned short argument)
{
unsigned int status;
// Set FMCN
switch (command) {
case AT91C_MC_FCMD_LOCK:
case AT91C_MC_FCMD_UNLOCK:
#if (EFC_NUM_GPNVMS > 0)
case AT91C_MC_FCMD_SET_GP_NVM:
case AT91C_MC_FCMD_CLR_GP_NVM:
#endif
#if !defined(EFC_NO_SECURITY_BIT)
case AT91C_MC_FCMD_SET_SECURITY:
#endif
pEfc->EFC_FMR = (pEfc->EFC_FMR & ~AT91C_MC_FMCN) | lMckFMCN;
break;
case AT91C_MC_FCMD_START_PROG:
case AT91C_MC_FCMD_ERASE_ALL:
pEfc->EFC_FMR = (pEfc->EFC_FMR & ~AT91C_MC_FMCN) | lMckFMCN;
break;
}
#ifdef BOARD_FLASH_IAP_ADDRESS
// Pointer on IAP function in ROM
static void (*IAP_PerformCommand)(unsigned int, unsigned int);
unsigned int index = 0;
#ifdef AT91C_BASE_EFC1
if (pEfc == AT91C_BASE_EFC1) {
index = 1;
}
#endif
IAP_PerformCommand = (void (*)(unsigned int, 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(index, (0x5A << 24) | (argument << 8) | command);
return (pEfc->EFC_FSR & (AT91C_MC_LOCKE | AT91C_MC_PROGE));
}
#endif
pEfc->EFC_FCR = (0x5A << 24) | (argument << 8) | command;
do {
status = pEfc->EFC_FSR;
}
while ((status & AT91C_MC_FRDY) == 0);
return (status & (AT91C_MC_PROGE | AT91C_MC_LOCKE));
}
//------------------------------------------------------------------------------
/// Returns the current status of an EFC. Keep in mind that this function clears
/// the value of some status bits (LOCKE, PROGE).
/// \param pEfc Pointer to an AT91S_EFC structure.
//------------------------------------------------------------------------------
unsigned int EFC_GetStatus(AT91S_EFC *pEfc)
{
return pEfc->EFC_FSR;
}
#endif //#ifdef BOARD_FLASH_EFC