168 lines
6.5 KiB
C++
Executable file
168 lines
6.5 KiB
C++
Executable file
// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "WL_Ext_Perf.h"
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#include <stdlib.h>
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#include "esp_log.h"
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static const char *TAG = "wl_ext_perf";
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#define WL_EXT_RESULT_CHECK(result) \
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if (result != ESP_OK) { \
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ESP_LOGE(TAG,"%s(%d): result = 0x%08x", __FUNCTION__, __LINE__, result); \
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return (result); \
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}
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WL_Ext_Perf::WL_Ext_Perf(): WL_Flash()
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{
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this->sector_buffer = NULL;
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}
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WL_Ext_Perf::~WL_Ext_Perf()
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{
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free(this->sector_buffer);
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}
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esp_err_t WL_Ext_Perf::config(WL_Config_s *cfg, Flash_Access *flash_drv)
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{
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wl_ext_cfg_t *config = (wl_ext_cfg_t *)cfg;
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this->fat_sector_size = config->fat_sector_size;
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this->flash_sector_size = cfg->sector_size;
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this->sector_buffer = (uint32_t *)malloc(cfg->sector_size);
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if (this->sector_buffer == NULL) {
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return ESP_ERR_NO_MEM;
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}
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this->size_factor = this->flash_sector_size / this->fat_sector_size;
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if (this->size_factor < 1) {
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return ESP_ERR_INVALID_ARG;
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}
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return WL_Flash::config(cfg, flash_drv);
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}
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esp_err_t WL_Ext_Perf::init()
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{
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return WL_Flash::init();
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}
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size_t WL_Ext_Perf::chip_size()
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{
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return WL_Flash::chip_size();
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}
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size_t WL_Ext_Perf::sector_size()
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{
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return this->fat_sector_size;
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}
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esp_err_t WL_Ext_Perf::erase_sector(size_t sector)
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{
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return this->erase_sector_fit(sector, 1);
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}
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esp_err_t WL_Ext_Perf::erase_sector_fit(uint32_t start_sector, uint32_t count)
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{
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ESP_LOGV(TAG, "%s begin, start_sector = 0x%08x, count = %i", __func__, start_sector, count);
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// This method works with one flash device sector and able to erase "count" of fatfs sectors from this sector
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esp_err_t result = ESP_OK;
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uint32_t pre_check_start = start_sector % this->size_factor;
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for (int i = 0; i < this->size_factor; i++) {
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if ((i < pre_check_start) || (i >= count + pre_check_start)) {
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result = this->read(start_sector / this->size_factor * this->flash_sector_size + i * this->fat_sector_size, &this->sector_buffer[i * this->fat_sector_size / sizeof(uint32_t)], this->fat_sector_size);
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WL_EXT_RESULT_CHECK(result);
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}
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}
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result = WL_Flash::erase_sector(start_sector / this->size_factor); // erase comlete flash sector
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WL_EXT_RESULT_CHECK(result);
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// And write back only data that should not be erased...
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for (int i = 0; i < this->size_factor; i++) {
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if ((i < pre_check_start) || (i >= count + pre_check_start)) {
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result = this->write(start_sector / this->size_factor * this->flash_sector_size + i * this->fat_sector_size, &this->sector_buffer[i * this->fat_sector_size / sizeof(uint32_t)], this->fat_sector_size);
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WL_EXT_RESULT_CHECK(result);
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}
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}
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return ESP_OK;
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}
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esp_err_t WL_Ext_Perf::erase_range(size_t start_address, size_t size)
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{
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esp_err_t result = ESP_OK;
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if ((start_address % this->fat_sector_size) != 0) {
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result = ESP_ERR_INVALID_ARG;
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}
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if (((size % this->fat_sector_size) != 0) || (size == 0)) {
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result = ESP_ERR_INVALID_ARG;
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}
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WL_EXT_RESULT_CHECK(result);
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// The range to erase could be allocated in any possible way
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// ---------------------------------------------------------
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// | | | | |
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// |0|0|x|x|x|x|x|x|x|x|x|x|x|x|0|0|
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// | pre | rest | rest | post | <- check ranges
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//
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// Pre check - the data that is not fit to the full sector at the begining of the erased block
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// Post check - the data that are not fit to the full sector at the end of the erased block
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// rest - data that are fit to the flash device sector at the middle of the erased block
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//
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// In case of pre and post check situations the data of the non erased area have to be readed first and then
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// stored back.
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// For the rest area this operation not needed because complete flash device sector will be erased.
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ESP_LOGV(TAG, "%s begin, addr = 0x%08x, size = %i", __func__, start_address, size);
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// Calculate pre check values
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uint32_t pre_check_start = (start_address / this->fat_sector_size) % this->size_factor;
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uint32_t sectors_count = size / this->fat_sector_size;
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uint32_t pre_check_count = (this->size_factor - pre_check_start);
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if (pre_check_count > sectors_count) {
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pre_check_count = sectors_count;
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}
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// Calculate post ckeck
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uint32_t post_check_count = (sectors_count - pre_check_count) % this->size_factor;
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uint32_t post_check_start = ((start_address + size - post_check_count * this->fat_sector_size) / this->fat_sector_size);
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// Calculate rest
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uint32_t rest_check_count = sectors_count - pre_check_count - post_check_count;
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if ((pre_check_count == this->size_factor) && (0 == pre_check_start)) {
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rest_check_count+=this->size_factor;
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pre_check_count = 0;
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}
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uint32_t rest_check_start = start_address + pre_check_count * this->fat_sector_size;
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// Here we will clear pre_check_count amount of sectors
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if (pre_check_count != 0) {
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result = this->erase_sector_fit(start_address / this->fat_sector_size, pre_check_count);
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WL_EXT_RESULT_CHECK(result);
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}
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ESP_LOGV(TAG, "%s rest_check_start = %i, pre_check_count=%i, rest_check_count=%i, post_check_count=%i\n", __func__, rest_check_start, pre_check_count, rest_check_count, post_check_count);
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if (rest_check_count > 0) {
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rest_check_count = rest_check_count / this->size_factor;
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size_t start_sector = rest_check_start / this->flash_sector_size;
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for (size_t i = 0; i < rest_check_count; i++) {
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result = WL_Flash::erase_sector(start_sector + i);
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WL_EXT_RESULT_CHECK(result);
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}
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}
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if (post_check_count != 0) {
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result = this->erase_sector_fit(post_check_start, post_check_count);
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WL_EXT_RESULT_CHECK(result);
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}
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return ESP_OK;
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}
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