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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| // Copyright 2022 Nick Brassel (@tzarc) | ||
| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| #include <stdint.h> | ||
| #include <string.h> | ||
|
|
||
| #include "eeprom_driver.h" | ||
| #include "wear_leveling.h" | ||
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|
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| void eeprom_driver_init(void) { | ||
| wear_leveling_init(); | ||
| } | ||
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|
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| void eeprom_driver_erase(void) { | ||
| wear_leveling_erase(); | ||
| } | ||
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| void eeprom_read_block(void *buf, const void *addr, size_t len) { | ||
| wear_leveling_read((uint32_t)addr, buf, len); | ||
| } | ||
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| void eeprom_write_block(const void *buf, void *addr, size_t len) { | ||
| wear_leveling_write((uint32_t)addr, buf, len); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // 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 | ||
|
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| bool backing_store_init(void) { | ||
| bs_dprintf("Init\n"); | ||
| flash_init(); | ||
| return true; | ||
| } | ||
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| bool backing_store_unlock(void) { | ||
| bs_dprintf("Unlock\n"); | ||
| // No-op -- handled by the flash driver as it is. | ||
| return true; | ||
| } | ||
|
|
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| bool backing_store_erase(void) { | ||
| #ifdef WEAR_LEVELING_DEBUG_OUTPUT | ||
| uint32_t start = timer_read32(); | ||
| #endif | ||
|
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| 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; | ||
| } | ||
| } | ||
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| bs_dprintf("Backing store erase took %ldms to complete\n", ((long)(timer_read32() - start))); | ||
| return ret; | ||
| } | ||
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| bool backing_store_write(uint32_t address, backing_store_int_t value) { | ||
| return backing_store_write_bulk(address, &value, 1); | ||
| } | ||
|
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| bool backing_store_lock(void) { | ||
| bs_dprintf("Lock \n"); | ||
| // No-op -- handled by the flash driver as it is. | ||
| return true; | ||
| } | ||
|
|
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| bool backing_store_read(uint32_t address, backing_store_int_t *value) { | ||
| return backing_store_read_bulk(address, value, 1); | ||
| } | ||
|
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| 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; | ||
| } | ||
|
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| 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]; | ||
| } | ||
|
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| bs_dprintf("Write "); | ||
| wl_dump(offset, temp, sizeof(backing_store_int_t) * this_loop); | ||
|
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||
| // Take the complement instead | ||
| for (size_t i = 0; i < this_loop; ++i) { | ||
| temp[i] = ~temp[i]; | ||
| } | ||
|
|
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| // Write out the block | ||
| if (flash_write_block(offset, temp, sizeof(backing_store_int_t) * this_loop) != FLASH_STATUS_SUCCESS) { | ||
| return false; | ||
| } | ||
|
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| offset += this_loop * sizeof(backing_store_int_t); | ||
| index += this_loop; | ||
| item_count -= this_loop; | ||
| } while (item_count > 0); | ||
|
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||
| return true; | ||
| } |
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