1 files changed, 26 insertions, 0 deletions
diff --git a/roms/u-boot/fs/btrfs/dev.c b/roms/u-boot/fs/btrfs/dev.c
new file mode 100644
index 000000000..1e5b83235
--- /dev/null
+++ b/roms/u-boot/fs/btrfs/dev.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * BTRFS filesystem implementation for U-Boot
+ *
+ * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
+ */
+
+#include <common.h>
+#include <blk.h>
+#include <compiler.h>
+#include <fs_internal.h>
+
+struct blk_desc *btrfs_blk_desc;
+struct disk_partition *btrfs_part_info;
+
+int btrfs_devread(u64 address, int byte_len, void *buf)
+{
+	lbaint_t sector;
+	int byte_offset;
+
+	sector = address >> btrfs_blk_desc->log2blksz;
+	byte_offset = address % btrfs_blk_desc->blksz;
+
+	return fs_devread(btrfs_blk_desc, btrfs_part_info, sector, byte_offset,
+			  byte_len, buf);
+}