int (*write_page)(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
int (*read_page)(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
int (*controller_ready)(struct nand_device_s *device, int timeout);
int (*write_page)(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
int (*read_page)(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
int (*controller_ready)(struct nand_device_s *device, int timeout);