+nand_device_t *get_nand_device_by_num(int num);
+
+int nand_read_page_raw(struct nand_device_s *nand, uint32_t page,
+ uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size);
+int nand_write_page_raw(struct nand_device_s *nand, uint32_t page,
+ uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size);
+
+int nand_read_status(struct nand_device_s *nand, uint8_t *status);
+
+int nand_calculate_ecc(struct nand_device_s *nand,
+ const uint8_t *dat, uint8_t *ecc_code);
+int nand_calculate_ecc_kw(struct nand_device_s *nand,
+ const uint8_t *dat, uint8_t *ecc_code);
+
+int nand_register_commands(struct command_context_s *cmd_ctx);
+int nand_init(struct command_context_s *cmd_ctx);
+
+/// helper for parsing a nand device command argument string
+int nand_command_get_device_by_num(struct command_context_s *cmd_ctx,
+ const char *str, nand_device_t **nand);
+