Wear-leveling EEPROM drivers: `embedded_flash`, `spi_flash`, `legacy` (#17376)

1 files changed, 59 insertions, 0 deletions

diff --git a/platforms/chibios/drivers/wear_leveling/wear_leveling_legacy.c b/platforms/chibios/drivers/wear_leveling/wear_leveling_legacy.c
new file mode 100644
index 0000000000..87126c4467
--- /dev/null
+++ b/platforms/chibios/drivers/wear_leveling/wear_leveling_legacy.c
@@ -0,0 +1,59 @@
+// Copyright 2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <stdbool.h>
+#include <hal.h>
+#include "timer.h"
+#include "wear_leveling.h"
+#include "wear_leveling_internal.h"
+#include "flash_stm32.h"
+
+bool backing_store_init(void) {
+    bs_dprintf("Init\n");
+    return true;
+}
+
+bool backing_store_unlock(void) {
+    bs_dprintf("Unlock\n");
+    FLASH_Unlock();
+    return true;
+}
+
+bool backing_store_erase(void) {
+#ifdef WEAR_LEVELING_DEBUG_OUTPUT
+    uint32_t start = timer_read32();
+#endif
+
+    bool         ret = true;
+    FLASH_Status status;
+    for (int i = 0; i < (WEAR_LEVELING_LEGACY_EMULATION_PAGE_COUNT); ++i) {
+        status = FLASH_ErasePage(WEAR_LEVELING_LEGACY_EMULATION_BASE_PAGE_ADDRESS + (i * (WEAR_LEVELING_LEGACY_EMULATION_PAGE_SIZE)));
+        if (status != FLASH_COMPLETE) {
+            ret = false;
+        }
+    }
+
+    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) {
+    uint32_t offset = ((WEAR_LEVELING_LEGACY_EMULATION_BASE_PAGE_ADDRESS) + address);
+    bs_dprintf("Write ");
+    wl_dump(offset, &value, sizeof(backing_store_int_t));
+    return FLASH_ProgramHalfWord(offset, ~value) == FLASH_COMPLETE;
+}
+
+bool backing_store_lock(void) {
+    bs_dprintf("Lock  \n");
+    FLASH_Lock();
+    return true;
+}
+
+bool backing_store_read(uint32_t address, backing_store_int_t* value) {
+    uint32_t             offset = ((WEAR_LEVELING_LEGACY_EMULATION_BASE_PAGE_ADDRESS) + address);
+    backing_store_int_t* loc    = (backing_store_int_t*)offset;
+    *value                      = ~(*loc);
+    bs_dprintf("Read  ");
+    wl_dump(offset, loc, sizeof(backing_store_int_t));
+    return true;
+}