Add raw_mmc_dev (untested!)

fusee/fusee-secondary/src/raw_mmc_dev.h

@@ -0,0 +1,37 @@
+#ifndef FUSEE_RAW_MMC_DEV_H
+#define FUSEE_RAW_MMC_DEV_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "sdmmc.h"
+
+#define RAWMMC_MAX_DEVICES 16
+
+/* Note: only XTS, CTR and ECB are supported */
+typedef void (*rawmmc_crypt_func_t)(void *dst, const void *src, size_t offset, size_t len, const uint8_t *iv, uint64_t flags);
+
+int rawmmcdev_mount_device(
+    const char *name,
+    struct mmc *mmc,
+    enum sdmmc_partition partition,
+    size_t offset,
+    size_t size,
+    rawmmc_crypt_func_t read_crypt_func,
+    rawmmc_crypt_func_t write_crypt_func,
+    uint64_t crypt_flags,
+    const uint8_t *iv
+);
+
+int rawmmcdev_mount_unencrypted_device(
+    const char *name,
+    struct mmc *mmc,
+    enum sdmmc_partition partition,
+    size_t offset,
+    size_t size
+);
+
+int rawmmcdev_unmount_device(const char *name);
+int rawmmcdev_unmount_all(void);
+
+#endif