0 #)ˆl–Ü4ý(© ³( Å €fàB¦-ÿÌ ƒu÷ZÅÄÏ&)/* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/include/linux/mtd/onenand.h * * Copyright © 2005-2009 Samsung Electronics * Kyungmin Park */ #ifndef __LINUX_MTD_ONENAND_H #define __LINUX_MTD_ONENAND_H #include #include #include #include #include #define MAX_DIES 2 #define MAX_BUFFERRAM 2 /* Scan and identify a OneNAND device */ extern int onenand_scan(struct mtd_info *mtd, int max_chips); /* Free resources held by the OneNAND device */ extern void onenand_release(struct mtd_info *mtd); /** * struct onenand_bufferram - OneNAND BufferRAM Data * @blockpage: block & page address in BufferRAM */ struct onenand_bufferram { int blockpage; }; /** * struct onenand_chip - OneNAND Private Flash Chip Data * @base: [BOARDSPECIFIC] address to access OneNAND * @dies: [INTERN][FLEX-ONENAND] number of dies on chip * @boundary: [INTERN][FLEX-ONENAND] Boundary of the dies * @diesize: [INTERN][FLEX-ONENAND] Size of the dies * @chipsize: [INTERN] the size of one chip for multichip arrays * FIXME For Flex-OneNAND, chipsize holds maximum possible * device size ie when all blocks are considered MLC * @device_id: [INTERN] device ID * @density_mask: chip density, used for DDP devices * @verstion_id: [INTERN] version ID * @options: [BOARDSPECIFIC] various chip options. They can * partly be set to inform onenand_scan about * @erase_shift: [INTERN] number of address bits in a block * @page_shift: [INTERN] number of address bits in a page * @page_mask: [INTERN] a page per block mask * @writesize: [INTERN] a real page size * @bufferram_index: [INTERN] BufferRAM index * @bufferram: [INTERN] BufferRAM info * @readw: [REPLACEABLE] hardware specific function for read short * @writew: [REPLACEABLE] hardware specific function for write short * @command: [REPLACEABLE] hardware specific function for writing * commands to the chip * @wait: [REPLACEABLE] hardware specific function for wait on ready * @bbt_wait: [REPLACEABLE] hardware specific function for bbt wait on ready * @unlock_all: [REPLACEABLE] hardware specific function for unlock all * @read_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area * @write_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area * @read_word: [REPLACEABLE] hardware specific function for read * register of OneNAND * @write_word: [REPLACEABLE] hardware specific function for write * register of OneNAND * @mmcontrol: sync burst read function * @chip_probe: [REPLACEABLE] hardware specific function for chip probe * @block_markbad: function to mark a block as bad * @scan_bbt: [REPLACEALBE] hardware specific function for scanning * Bad block Table * @chip_lock: [INTERN] spinlock used to protect access to this * structure and the chip * @wq: [INTERN] wait queue to sleep on if a OneNAND * operation is in progress * @state: [INTERN] the current state of the OneNAND device * @page_buf: [INTERN] page main data buffer * @oob_buf: [INTERN] page oob data buffer * @subpagesize: [INTERN] holds the subpagesize * @bbm: [REPLACEABLE] pointer to Bad Block Management * @priv: [OPTIONAL] pointer to private chip date */ struct onenand_chip { void __iomem *base; unsigned dies; unsigned boundary[MAX_DIES]; loff_t diesize[MAX_DIES]; unsigned int chipsize; unsigned int device_id; unsigned int version_id; unsigned int technology; unsigned int density_mask; unsigned int options; unsigned int badblockpos; unsigned int erase_shift; unsigned int page_shift; unsigned int page_mask; unsigned int writesize; unsigned int bufferram_index; struct onenand_bufferram bufferram[MAX_BUFFERRAM]; int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len); int (*wait)(struct mtd_info *mtd, int state); int (*bbt_wait)(struct mtd_info *mtd, int state); void (*unlock_all)(str