| /* |
| * Copyright (c) 2017, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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. |
| */ |
| |
| /** |
| * @file |
| * This file implements the OpenThread platform abstraction for the non-volatile storage. |
| */ |
| |
| #include <openthread/config.h> |
| #include <openthread/platform/alarm.h> |
| |
| #include "utils/code_utils.h" |
| #include "utils/flash.h" |
| |
| #include "em_msc.h" |
| |
| #define FLASH_DATA_USED_PAGES 10 |
| #define FLASH_DATA_END_ADDR (FLASH_BASE + FLASH_SIZE) |
| #define FLASH_DATA_START_ADDR (FLASH_DATA_END_ADDR - (FLASH_PAGE_SIZE * FLASH_DATA_USED_PAGES)) |
| |
| static inline uint32_t mapAddress(uint32_t aAddress) |
| { |
| return aAddress + FLASH_DATA_START_ADDR; |
| } |
| |
| static otError returnTypeConvert(int32_t aStatus) |
| { |
| otError error = OT_ERROR_NONE; |
| |
| switch (aStatus) |
| { |
| case mscReturnOk: |
| error = OT_ERROR_NONE; |
| break; |
| |
| case mscReturnInvalidAddr: |
| case mscReturnUnaligned: |
| error = OT_ERROR_INVALID_ARGS; |
| break; |
| |
| default: |
| error = OT_ERROR_FAILED; |
| } |
| |
| return error; |
| } |
| |
| otError utilsFlashInit(void) |
| { |
| MSC_Init(); |
| return OT_ERROR_NONE; |
| } |
| |
| uint32_t utilsFlashGetSize(void) |
| { |
| return FLASH_DATA_END_ADDR - FLASH_DATA_START_ADDR; |
| } |
| |
| otError utilsFlashErasePage(uint32_t aAddress) |
| { |
| int32_t status; |
| |
| status = MSC_ErasePage((uint32_t *)mapAddress(aAddress)); |
| |
| return returnTypeConvert(status); |
| } |
| |
| otError utilsFlashStatusWait(uint32_t aTimeout) |
| { |
| otError error = OT_ERROR_BUSY; |
| uint32_t start = otPlatAlarmGetNow(); |
| |
| do |
| { |
| if (MSC->STATUS & MSC_STATUS_WDATAREADY) |
| { |
| error = OT_ERROR_NONE; |
| break; |
| } |
| } |
| while (aTimeout && ((otPlatAlarmGetNow() - start) < aTimeout)); |
| |
| return error; |
| } |
| |
| uint32_t utilsFlashWrite(uint32_t aAddress, uint8_t *aData, uint32_t aSize) |
| { |
| uint32_t rval = aSize; |
| int32_t status; |
| |
| otEXPECT_ACTION(aData, rval = 0); |
| otEXPECT_ACTION(((aAddress + aSize) < utilsFlashGetSize()) && |
| (!(aAddress & 3)) && (!(aSize & 3)), rval = 0); |
| |
| status = MSC_WriteWord((uint32_t *)mapAddress(aAddress), aData, aSize); |
| otEXPECT_ACTION(returnTypeConvert(status) == OT_ERROR_NONE, rval = 0); |
| |
| exit: |
| return rval; |
| } |
| |
| uint32_t utilsFlashRead(uint32_t aAddress, uint8_t *aData, uint32_t aSize) |
| { |
| uint32_t rval = aSize; |
| uint32_t pAddress = mapAddress(aAddress); |
| uint8_t *byte = aData; |
| |
| otEXPECT_ACTION(aData, rval = 0); |
| otEXPECT_ACTION((aAddress + aSize) < utilsFlashGetSize(), rval = 0); |
| |
| while (aSize--) |
| { |
| *byte++ = (*(uint8_t *)(pAddress++)); |
| } |
| |
| exit: |
| return rval; |
| } |