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// Copyright 2022 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later
#include <stdbool.h>
#include <hal.h>
#include "util.h"
#include "timer.h"
#include "wear_leveling.h"
#include "wear_leveling_internal.h"
#ifndef WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT
# define WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT 32
#endif // WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT
bool backing_store_init(void) {
bs_dprintf("Init\n");
flash_init();
return true;
}
bool backing_store_unlock(void) {
bs_dprintf("Unlock\n");
// No-op -- handled by the flash driver as it is.
return true;
}
bool backing_store_erase(void) {
#ifdef WEAR_LEVELING_DEBUG_OUTPUT
uint32_t start = timer_read32();
#endif
bool ret = true;
for (int i = 0; i < (WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_COUNT); ++i) {
flash_status_t status = flash_erase_block(((WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_OFFSET) + i) * (EXTERNAL_FLASH_BLOCK_SIZE));
if (status != FLASH_STATUS_SUCCESS) {
ret = false;
break;
}
}
bs_dprintf("Backing store erase took %ldms to complete\n", ((long)(timer_read32() - start)));
return ret;
}
bool backing_store_write(uint32_t address, backing_store_int_t value) {
return backing_store_write_bulk(address, &value, 1);
}
bool backing_store_lock(void) {
bs_dprintf("Lock \n");
// No-op -- handled by the flash driver as it is.
return true;
}
bool backing_store_read(uint32_t address, backing_store_int_t *value) {
return backing_store_read_bulk(address, value, 1);
}
bool backing_store_read_bulk(uint32_t address, backing_store_int_t *values, size_t item_count) {
bs_dprintf("Read ");
uint32_t offset = (WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_OFFSET) * (EXTERNAL_FLASH_BLOCK_SIZE) + address;
flash_status_t status = flash_read_block(offset, values, sizeof(backing_store_int_t) * item_count);
if (status == FLASH_STATUS_SUCCESS) {
for (size_t i = 0; i < item_count; ++i) {
values[i] = ~values[i];
}
wl_dump(offset, values, sizeof(backing_store_int_t) * item_count);
}
return status == FLASH_STATUS_SUCCESS;
}
bool backing_store_write_bulk(uint32_t address, backing_store_int_t *values, size_t item_count) {
uint32_t offset = (WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_OFFSET) * (EXTERNAL_FLASH_BLOCK_SIZE) + address;
size_t index = 0;
backing_store_int_t temp[WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT];
do {
// Copy out the block of data we want to transmit first
size_t this_loop = MIN(item_count, WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT);
for (size_t i = 0; i < this_loop; ++i) {
temp[i] = values[index + i];
}
bs_dprintf("Write ");
wl_dump(offset, temp, sizeof(backing_store_int_t) * this_loop);
// Take the complement instead
for (size_t i = 0; i < this_loop; ++i) {
temp[i] = ~temp[i];
}
// Write out the block
if (flash_write_block(offset, temp, sizeof(backing_store_int_t) * this_loop) != FLASH_STATUS_SUCCESS) {
return false;
}
offset += this_loop * sizeof(backing_store_int_t);
index += this_loop;
item_count -= this_loop;
} while (item_count > 0);
return true;
}
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