1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/flash/flash.h b/drivers/flash/flash.h
new file mode 100644
index 0000000000..4d62475139
--- /dev/null
+++ b/drivers/flash/flash.h
@@ -0,0 +1,126 @@
+// Copyright 2024 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+/**
+ * @brief The status of a flash operation.
+ */
+enum {
+    FLASH_STATUS_SUCCESS     = 0,  //< The operation completed successfully.
+    FLASH_STATUS_ERROR       = -1, //< An error occurred during the operation.
+    FLASH_STATUS_TIMEOUT     = -2, //< The operation timed out.
+    FLASH_STATUS_BAD_ADDRESS = -3, //< The address is out of bounds.
+    FLASH_STATUS_BUSY        = -4, //< The flash is busy.
+};
+
+/**
+ * @brief The status of a flash operation.
+ */
+typedef int16_t flash_status_t;
+
+/**
+ * @brief Initializes the flash driver.
+ *
+ * This function initializes the flash driver and prepares it for use.
+ * It should be called before any other flash-related functions are used.
+ */
+void flash_init(void);
+
+/**
+ * @brief Checks if the flash is busy.
+ *
+ * This function checks if the flash is currently busy with an operation.
+ *
+ * @return FLASH_STATUS_SUCCESS if the flash is not busy, FLASH_STATUS_BUSY if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_is_busy(void);
+
+/**
+ * @brief Initiates a chip erase operation.
+ *
+ * This function does not wait for the flash to become ready.
+ *
+ * @return FLASH_STATUS_SUCCESS if the erase command was successfully sent, FLASH_STATUS_TIMEOUT if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_begin_erase_chip(void);
+
+/**
+ * @brief Waits for the chip erase operation to complete.
+ *
+ * This function waits for the chip erase operation to complete.
+ *
+ * @return FLASH_STATUS_SUCCESS if the chip erase operation completed successfully, FLASH_STATUS_TIMEOUT if the flash was still busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_wait_erase_chip(void);
+
+/**
+ * @brief Erases the entire flash memory chip.
+ *
+ * This function initiates an erase operation to erase the entire flash memory chip.
+ * It waits for the operation to complete.
+ *
+ * @return FLASH_STATUS_SUCCESS if the erase was successfully executed, FLASH_STATUS_TIMEOUT if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_erase_chip(void);
+
+/**
+ * @brief Erases a block of flash memory.
+ *
+ * This function initiates an erase operation to erase a block of flash memory.
+ * It waits for the operation to complete.
+ *
+ * @param addr The address of the block to erase.
+ *
+ * @return FLASH_STATUS_SUCCESS if the erase was successfully executed, FLASH_STATUS_TIMEOUT if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_erase_block(uint32_t addr);
+
+/**
+ * @brief Erases a sector of flash memory.
+ *
+ * This function initiates an erase operation to erase a sector of flash memory.
+ * It waits for the operation to complete.
+ *
+ * @param addr The address of the sector to erase.
+ *
+ * @return FLASH_STATUS_SUCCESS if the erase was successfully executed, FLASH_STATUS_TIMEOUT if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_erase_sector(uint32_t addr);
+
+/**
+ * @brief Reads a range of flash memory.
+ *
+ * This function reads a range of flash memory into a buffer.
+ *
+ * @param addr The address of the range to read.
+ * @param buf A pointer to the buffer to read the range into.
+ * @param len The length of the range to read.
+ *
+ * @return FLASH_STATUS_SUCCESS if the range was successfully read, FLASH_STATUS_BAD_ADDRESS if the address is out of bounds, FLASH_STATUS_TIMEOUT if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_read_range(uint32_t addr, void *buf, size_t len);
+
+/**
+ * @brief Writes a range of flash memory.
+ *
+ * This function writes a range of flash memory from a buffer.
+ *
+ * @param addr The address of the range to write.
+ * @param buf A pointer to the buffer to write to the range.
+ * @param len The length of the range to write.
+ *
+ * @return FLASH_STATUS_SUCCESS if the range was successfully written, FLASH_STATUS_BAD_ADDRESS if the address is out of bounds, FLASH_STATUS_TIMEOUT if the flash is busy, or FLASH_STATUS_ERROR if an error occurred.
+ */
+flash_status_t flash_write_range(uint32_t addr, const void *buf, size_t len);
+
+#ifdef __cplusplus
+}
+#endif