接口描述
3 接口描述
3.1 驱动物理层接口
3.1.1 spi_nor_erase
description：mtd erase interface @mtd： MTD device structure @instr： erase operation descrition structure return：success return 0，fail return fail code**
3.1.2 spi_nor_read
description：mtd read interface @mtd：MTD device structure @from： offset to read from MTD device @len： data len @retlen： had read data len @buf： data buffer return：success return max_bitflips，fail return fail code**
3.1.3 spi_nor_write
static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
description：mtd write data interface @to： offset to MTD device @len： want write data len @retlen：return the writen len @buf： data buffer return： success return 0, fail return code fail
3.1.4 spi_nor_lock
static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
description：check block is badblock or not
@mtd：MTD device structure @ofs: offset the mtd device start (align to simu block size) @len：The length of the operating return： success return 0, fail return code fail
3.1.5 spi_nor_unlock
static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
description：check block is badblock or not
@mtd：MTD device structure @ofs: offset the mtd device start (align to simu block size) @len：The length of the operating return： success return 0, fail return code fail
3.1.6 spi_nor_is_locked
static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
description：check block is badblock or not
@mtd：MTD device structure @ofs: offset the mtd device start (align to simu block size) @len：The length of the operating return： Is lock return 1, else return 0
3.1.7 spi_nor_has_lock_erase
description：mtd has lock erase interface，First unlock to operate space, after the completion of the flash lock up @mtd： MTD device structure @instr： erase operation descrition structure return：success return 0，fail return fail code
3.1.8 spi_nor_has_lock_write
static int spi_nor_has_lock_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
description：mtd has lock write data interface，First unlock to operate space, after the completion of the flash lock up @to： offset to MTD device @len： want write data len @retlen：return the writen len @buf： data buffer return： success return 0, fail return code fail
3.2 Uboot 应用接口
3.2.1 sunxi_flash_spinor_probe
description：SPINOR initialization，Set the storage type。 return：zero on success, else a negative error code.
3.2.2 sunxi_flash_spinor_init
description：SPINOR initialization。 @boot_mode：Working mode @res：The default is 0 return：zero on success, else a negative error code.
3.2.3 sunxi_flash_spinor_exit
description：Release registration is a resource for applications. return：zero on success, else a negative error code.
3.2.4 sunxi_flash_spinor_write
description：mtd write data interface. @start_block：want write start sector @nblock：want write sectorcount @buffer：data buffer
return：zero on success, else a negative error code.
3.2.5 sunxi_flash_spinor_write
description：mtd readdata interface. @start_block：want read start sector @nblock：want read sector count @buffer：data buffer return：zero on success, else a negative error code.
3.2.6 sunxi_flash_spinor_erase
description：erase boot || partition data. @erase：erase flag @buffer：The default is NULL return：zero on success, else a negative error code.
3.2.7 sunxi_flash_spinor_force_erase
description：erase boot & partition data. return：zero on success, else a negative error code.
3.2.8 sunxi_flash_spinor_flush
description：Flush physical cache data to flash.
return：zero on success, else a negative error code.
3.2.9 sunxi_flash_spinor_download_spl
description：write boot0. @buf：boot0 data buffer @len：boot0 data len @ext：storage type return：zero on success, else a negative error code.
3.2.10 sunxi_flash_spinor_download_toc
description：write uboot. @buf：uboot data buffer @len：uboot data len @ext：storage type return：zero on success, else a negative error code.