FLASH(9) Kernel Developer's Manual FLASH(9)

flash — subsystem for flash-like memory devices

#include <dev/flash/flash.h>

device_t
flash_attach_mi(const struct flash_interface *fl, device_t dev);

Flash-like devices can register themselves to the flash layer with the flash_hw_if structure. This structure has function pointers and other fields.

The attachment can be done by calling () with this structure and the device's device_t as an argument. Return value is the flash layer device. The flash_interface structure is shown below.

struct flash_interface {
	int (*erase) (device_t, struct flash_erase_instruction *);
	int (*read) (device_t, off_t, size_t, size_t *, uint8_t *);
	int (*write) (device_t, off_t, size_t, size_t *, const uint8_t *);
	int (*block_markbad)(device_t, uint64_t);
	int (*block_isbad)(device_t, uint64_t);
	int (*sync) (device_t);

	int (*submit)(device_t, struct buf *);

	/* storage for partition info */
	struct flash_partition partition;

	/* total size of mtd */
	flash_addr_t size;
	uint32_t page_size;
	uint32_t erasesize;
	uint32_t writesize;
	uint32_t minor;
	uint8_t	type;
};

flash(4), nand(9)

Adam Hoka <ahoka@NetBSD.org>

March 31, 2011 NetBSD 11.0