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EDIT: onenand.h
/* * linux/include/linux/mtd/onenand.h * * Copyright © 2005-2009 Samsung Electronics * Kyungmin Park <kyungmin.park@samsung.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __LINUX_MTD_ONENAND_H #define __LINUX_MTD_ONENAND_H #include <linux/spinlock.h> #include <linux/completion.h> #include <linux/mtd/flashchip.h> #include <linux/mtd/onenand_regs.h> #include <linux/mtd/bbm.h> #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 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)(struct mtd_info *mtd); int (*read_bufferram)(struct mtd_info *mtd, int area, unsigned char *buffer, int offset, size_t count); int (*write_bufferram)(struct mtd_info *mtd, int area, const unsigned char *buffer, int offset, size_t count); unsigned short (*read_word)(void __iomem *addr); void (*write_word)(unsigned short value, void __iomem *addr); void (*mmcontrol)(struct mtd_info *mtd, int sync_read); int (*chip_probe)(struct mtd_info *mtd); int (*block_markbad)(struct mtd_info *mtd, loff_t ofs); int (*scan_bbt)(struct mtd_info *mtd); int (*enable)(struct mtd_info *mtd); int (*disable)(struct mtd_info *mtd); struct completion complete; int irq; spinlock_t chip_lock; wait_queue_head_t wq; flstate_t state; unsigned char *page_buf; unsigned char *oob_buf; #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE unsigned char *verify_buf; #endif int subpagesize; void *bbm; void *priv; /* * Shows that the current operation is composed * of sequence of commands. For example, cache program. * Such command status OnGo bit is checked at the end of * sequence. */ unsigned int ongoing; }; /* * Helper macros */ #define ONENAND_PAGES_PER_BLOCK (1<<6) #define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index) #define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1) #define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1) #define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1) #define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0) #define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1) #define FLEXONENAND(this) \ (this->device_id & DEVICE_IS_FLEXONENAND) #define ONENAND_GET_SYS_CFG1(this) \ (this->read_word(this->base + ONENAND_REG_SYS_CFG1)) #define ONENAND_SET_SYS_CFG1(v, this) \ (this->write_word(v, this->base + ONENAND_REG_SYS_CFG1)) #define ONENAND_IS_DDP(this) \ (this->device_id & ONENAND_DEVICE_IS_DDP) #define ONENAND_IS_MLC(this) \ (this->technology & ONENAND_TECHNOLOGY_IS_MLC) #ifdef CONFIG_MTD_ONENAND_2X_PROGRAM #define ONENAND_IS_2PLANE(this) \ (this->options & ONENAND_HAS_2PLANE) #else #define ONENAND_IS_2PLANE(this) (0) #endif #define ONENAND_IS_CACHE_PROGRAM(this) \ (this->options & ONENAND_HAS_CACHE_PROGRAM) #define ONENAND_IS_NOP_1(this) \ (this->options & ONENAND_HAS_NOP_1) /* Check byte access in OneNAND */ #define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1) /* * Options bits */ #define ONENAND_HAS_CONT_LOCK (0x0001) #define ONENAND_HAS_UNLOCK_ALL (0x0002) #define ONENAND_HAS_2PLANE (0x0004) #define ONENAND_HAS_4KB_PAGE (0x0008) #define ONENAND_HAS_CACHE_PROGRAM (0x0010) #define ONENAND_HAS_NOP_1 (0x0020) #define ONENAND_SKIP_UNLOCK_CHECK (0x0100) #define ONENAND_PAGEBUF_ALLOC (0x1000) #define ONENAND_OOBBUF_ALLOC (0x2000) #define ONENAND_SKIP_INITIAL_UNLOCKING (0x4000) #define ONENAND_IS_4KB_PAGE(this) \ (this->options & ONENAND_HAS_4KB_PAGE) /* * OneNAND Flash Manufacturer ID Codes */ #define ONENAND_MFR_SAMSUNG 0xec #define ONENAND_MFR_NUMONYX 0x20 /** * struct onenand_manufacturers - NAND Flash Manufacturer ID Structure * @name: Manufacturer name * @id: manufacturer ID code of device. */ struct onenand_manufacturers { int id; char *name; }; int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops); unsigned onenand_block(struct onenand_chip *this, loff_t addr); loff_t onenand_addr(struct onenand_chip *this, int block); int flexonenand_region(struct mtd_info *mtd, loff_t addr); struct mtd_partition; struct onenand_platform_data { void (*mmcontrol)(struct mtd_info *mtd, int sync_read); int (*read_bufferram)(struct mtd_info *mtd, int area, unsigned char *buffer, int offset, size_t count); struct mtd_partition *parts; unsigned int nr_parts; }; #endif /* __LINUX_MTD_ONENAND_H */