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- /*
- * Lua RTOS, SPIFFS low access
- *
- * Copyright (C) 2015 - 2017
- * IBEROXARXA SERVICIOS INTEGRALES, S.L. & CSS IBÉRICA, S.L.
- *
- * Author: Jaume Olivé (jolive@iberoxarxa.com / jolive@whitecatboard.org)
- *
- * All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for any purpose and without fee is hereby
- * granted, provided that the above copyright notice appear in all
- * copies and that both that the copyright notice and this
- * permission notice and warranty disclaimer appear in supporting
- * documentation, and that the name of the author not be used in
- * advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission.
- *
- * The author disclaim all warranties with regard to this
- * software, including all implied warranties of merchantability
- * and fitness. In no event shall the author be liable for any
- * special, indirect or consequential damages or any damages
- * whatsoever resulting from loss of use, data or profits, whether
- * in an action of contract, negligence or other tortious action,
- * arising out of or in connection with the use or performance of
- * this software.
- */
-
- #include <stdlib.h>
-
- #include "esp_spiffs.h"
- #include "esp_attr.h"
-
- #include "spiffs.h"
-
- #include <esp_spi_flash.h>
-
- s32_t IRAM_ATTR esp32_spi_flash_read(u32_t addr, u32_t size, u8_t *dst) {
- u32_t aaddr;
- u8_t *buff = NULL;
- u8_t *abuff = NULL;
- u32_t asize;
-
- asize = size;
-
- // Align address to 4 byte
- aaddr = (addr + (4 - 1)) & (u32_t)-4;
- if (aaddr != addr) {
- aaddr -= 4;
- asize += (addr - aaddr);
- }
-
- // Align size to 4 byte
- asize = (asize + (4 - 1)) & (u32_t)-4;
-
- if ((aaddr != addr) || (asize != size)) {
- // Align buffer
- buff = malloc(asize + 4);
- if (!buff) {
- return SPIFFS_ERR_INTERNAL;
- }
-
- abuff = (u8_t *)(((ptrdiff_t)buff + (4 - 1)) & (u32_t)-4);
-
- if (spi_flash_read(aaddr, (void *)abuff, asize) != 0) {
- free(buff);
- return SPIFFS_ERR_INTERNAL;
- }
-
- memcpy(dst, abuff + (addr - aaddr), size);
-
- free(buff);
- } else {
- if (spi_flash_read(addr, (void *)dst, size) != 0) {
- return SPIFFS_ERR_INTERNAL;
- }
- }
-
- return SPIFFS_OK;
- }
-
- s32_t IRAM_ATTR esp32_spi_flash_write(u32_t addr, u32_t size, const u8_t *src) {
- u32_t aaddr;
- u8_t *buff = NULL;
- u8_t *abuff = NULL;
- u32_t asize;
-
- asize = size;
-
- // Align address to 4 byte
- aaddr = (addr + (4 - 1)) & -4;
- if (aaddr != addr) {
- aaddr -= 4;
- asize += (addr - aaddr);
- }
-
- // Align size to 4 byte
- asize = (asize + (4 - 1)) & -4;
-
- if ((aaddr != addr) || (asize != size)) {
- // Align buffer
- buff = malloc(asize + 4);
- if (!buff) {
- return SPIFFS_ERR_INTERNAL;
- }
-
- abuff = (u8_t *)(((ptrdiff_t)buff + (4 - 1)) & -4);
-
- if (spi_flash_read(aaddr, (void *)abuff, asize) != 0) {
- free(buff);
- return SPIFFS_ERR_INTERNAL;
- }
-
- memcpy(abuff + (addr - aaddr), src, size);
-
- if (spi_flash_write(aaddr, (uint32_t *)abuff, asize) != 0) {
- free(buff);
- return SPIFFS_ERR_INTERNAL;
- }
-
- free(buff);
- } else {
- if (spi_flash_write(addr, (uint32_t *)src, size) != 0) {
- return SPIFFS_ERR_INTERNAL;
- }
- }
-
- return SPIFFS_OK;
- }
-
- s32_t IRAM_ATTR esp32_spi_flash_erase(u32_t addr, u32_t size) {
- if (spi_flash_erase_sector(addr >> 12) != 0) {
- return SPIFFS_ERR_INTERNAL;
- }
-
- return SPIFFS_OK;
- }
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