Import Mbed OS hard-float snapshot
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Beslan
260
targets/TARGET_Maxim/TARGET_MAX32630/mxc/flc.c
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targets/TARGET_Maxim/TARGET_MAX32630/mxc/flc.c
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/**
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* @file
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* @brief This file contains the function implementations for the Flash
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* Controller (FLC) peripheral module.
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*/
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/* ****************************************************************************
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* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Maxim Integrated
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* Products, Inc. shall not be used except as stated in the Maxim Integrated
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* Products, Inc. Branding Policy.
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*
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* The mere transfer of this software does not imply any licenses
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* of trade secrets, proprietary technology, copyrights, patents,
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* trademarks, maskwork rights, or any other form of intellectual
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* property whatsoever. Maxim Integrated Products, Inc. retains all
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* ownership rights.
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*
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* $Date: 2016-09-09 11:48:21 -0500 (Fri, 09 Sep 2016) $
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* $Revision: 24338 $
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*
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*************************************************************************** */
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/* **** Includes **** */
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#include "mxc_config.h"
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#include "flc.h"
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/**
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* @ingroup flc
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* @{
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*/
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/* **** Definitions **** */
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/* **** Globals **** */
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/* **** Functions **** */
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/* ************************************************************************* */
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#if defined ( __GNUC__ )
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#undef IAR_PRAGMAS //Make sure this is not defined for GCC
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#endif
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#if IAR_PRAGMAS
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// IAR memory section declaration for the in-system flash programming functions to be loaded in RAM.
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#pragma section=".flashprog"
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#endif
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#if defined ( __GNUC__ )
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__attribute__ ((section(".flashprog")))
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#endif
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/**
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* @brief Return the status of the busy state of the flash controller.
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*
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* @return 0 Flash Controller is idle.
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* @return Non-zero indicates the flash controller is performing an
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* erase or write request.
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*/
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__STATIC_INLINE int FLC_Busy(void)
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{
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return (MXC_FLC->ctrl & (MXC_F_FLC_CTRL_WRITE | MXC_F_FLC_CTRL_MASS_ERASE | MXC_F_FLC_CTRL_PAGE_ERASE));
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}
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/* ************************************************************************* */
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#if IAR_PRAGMAS
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// IAR memory section declaration for the in-system flash programming functions to be loaded in RAM.
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#pragma section=".flashprog"
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#endif
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#if defined ( __GNUC__ )
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__attribute__ ((section(".flashprog")))
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#endif
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int FLC_Init(void)
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{
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/* Check if the flash controller is busy */
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if (FLC_Busy()) {
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return E_BUSY;
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}
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/* Enable automatic calculation of the clock divider to generate a 1MHz clock from the APB clock */
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MXC_FLC->perform |= MXC_F_FLC_PERFORM_AUTO_CLKDIV;
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/* The flash controller will stall any reads while flash operations are in
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* progress. Disable the legacy failure detection logic that would flag reads
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* during flash operations as errors.
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*/
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MXC_FLC->perform |= MXC_F_FLC_PERFORM_EN_PREVENT_FAIL;
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return E_NO_ERROR;
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}
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/* ************************************************************************* */
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#if IAR_PRAGMAS
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// IAR memory section declaration for the in-system flash programming functions to be loaded in RAM.
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#pragma section=".flashprog"
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#endif
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#if defined ( __GNUC__ )
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__attribute__ ((section(".flashprog")))
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#endif
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int FLC_PageErase(uint32_t address, uint8_t erase_code, uint8_t unlock_key)
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{
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/* Check if the flash controller is busy */
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if (FLC_Busy()) {
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return E_BUSY;
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}
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/* Clear stale errors. Interrupt flags can only be written to zero, so this is safe */
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MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
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/* Unlock flash */
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MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_FLSH_UNLOCK) |
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((unlock_key << MXC_F_FLC_CTRL_FLSH_UNLOCK_POS) & MXC_F_FLC_CTRL_FLSH_UNLOCK);
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/* Write the Erase Code */
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MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_ERASE_CODE) |
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((erase_code << MXC_F_FLC_CTRL_ERASE_CODE_POS) & MXC_F_FLC_CTRL_ERASE_CODE);
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/* Erase the request page */
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MXC_FLC->faddr = address;
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MXC_FLC->ctrl |= MXC_F_FLC_CTRL_PAGE_ERASE;
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/* Wait until flash operation is complete */
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while (FLC_Busy());
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/* Lock flash */
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MXC_FLC->ctrl &= ~(MXC_F_FLC_CTRL_FLSH_UNLOCK | MXC_F_FLC_CTRL_ERASE_CODE);
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/* Check for failures */
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if (MXC_FLC->intr & MXC_F_FLC_INTR_FAILED_IF) {
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/* Interrupt flags can only be written to zero, so this is safe */
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MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
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return E_UNKNOWN;
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}
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return E_NO_ERROR;
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}
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/* ************************************************************************* */
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#if IAR_PRAGMAS
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// IAR memory section declaration for the in-system flash programming functions to be loaded in RAM.
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#pragma section=".flashprog"
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#endif
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#if defined ( __GNUC__ )
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__attribute__ ((section(".flashprog")))
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#endif
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int FLC_Write(uint32_t address, const void *data, uint32_t length, uint8_t unlock_key)
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{
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uint32_t *ptr = (uint32_t*)data;
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/* Can only write in full word units */
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if ((address & 3) || (length & 3)) {
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return E_BAD_PARAM;
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}
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if (length == 0) {
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/* Nothing to do */
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return E_NO_ERROR;
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}
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/* Check if the flash controller is busy */
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if (FLC_Busy()) {
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return E_BUSY;
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}
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/* Clear stale errors. Interrupt flags can only be written to zero, so this is safe */
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MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
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/* Unlock flash */
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MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_FLSH_UNLOCK) |
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((unlock_key << MXC_F_FLC_CTRL_FLSH_UNLOCK_POS) & MXC_F_FLC_CTRL_FLSH_UNLOCK);
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/* Set the address to write and enable auto increment */
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MXC_FLC->faddr = address;
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MXC_FLC->ctrl |= MXC_F_FLC_CTRL_AUTO_INCRE_MODE;
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uint32_t write_cmd = MXC_FLC->ctrl | MXC_F_FLC_CTRL_WRITE;
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for (; length > 0; length -= 4) {
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/* Perform the write */
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MXC_FLC->fdata = *ptr++;
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MXC_FLC->ctrl = write_cmd;
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while (FLC_Busy());
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}
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/* Lock flash */
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MXC_FLC->ctrl &= ~MXC_F_FLC_CTRL_FLSH_UNLOCK;
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/* Check for failures */
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if (MXC_FLC->intr & MXC_F_FLC_INTR_FAILED_IF) {
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/* Interrupt flags can only be written to zero, so this is safe */
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MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
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return E_UNKNOWN;
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}
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return E_NO_ERROR;
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}
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/* ************************************************************************* */
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#if IAR_PRAGMAS
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// IAR memory section declaration for the in-system flash programming functions to be loaded in RAM.
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#pragma section=".flashprog"
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#endif
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#if defined ( __GNUC__ )
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__attribute__ ((section(".flashprog")))
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#endif
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int FLC_MassErase(uint8_t erase_code, uint8_t unlock_key)
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{
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/* Check if the flash controller is busy */
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if (FLC_Busy()) {
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return E_BUSY;
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}
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/* Clear stale errors. Interrupt flags can only be written to zero, so this is safe */
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MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
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/* Unlock flash */
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MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_FLSH_UNLOCK) |
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((unlock_key << MXC_F_FLC_CTRL_FLSH_UNLOCK_POS) & MXC_F_FLC_CTRL_FLSH_UNLOCK);
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/* Write the Erase Code */
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MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_ERASE_CODE) |
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((erase_code << MXC_F_FLC_CTRL_ERASE_CODE_POS) & MXC_F_FLC_CTRL_ERASE_CODE);
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/* Start the mass erase */
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MXC_FLC->ctrl |= MXC_F_FLC_CTRL_MASS_ERASE;
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/* Wait until flash operation is complete */
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while (FLC_Busy());
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/* Lock flash */
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MXC_FLC->ctrl &= ~(MXC_F_FLC_CTRL_FLSH_UNLOCK | MXC_F_FLC_CTRL_ERASE_CODE);
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/* Check for failures */
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if (MXC_FLC->intr & MXC_F_FLC_INTR_FAILED_IF) {
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/* Interrupt flags can only be written to zero, so this is safe */
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MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
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return E_UNKNOWN;
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}
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return E_NO_ERROR;
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}
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/**@} end of group flc */
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