222 lines
7.3 KiB
C
222 lines
7.3 KiB
C
/*
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* linux/include/linux/mtd/onenand.h
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*
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* Copyright © 2005-2009 Samsung Electronics
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* Kyungmin Park <kyungmin.park@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __LINUX_MTD_ONENAND_H
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#define __LINUX_MTD_ONENAND_H
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/mtd/flashchip.h>
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#include <linux/mtd/onenand_regs.h>
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#include <linux/mtd/bbm.h>
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#define MAX_DIES 2
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#define MAX_BUFFERRAM 2
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/* Scan and identify a OneNAND device */
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extern int onenand_scan(struct mtd_info *mtd, int max_chips);
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/* Free resources held by the OneNAND device */
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extern void onenand_release(struct mtd_info *mtd);
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/**
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* struct onenand_bufferram - OneNAND BufferRAM Data
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* @blockpage: block & page address in BufferRAM
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*/
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struct onenand_bufferram {
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int blockpage;
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};
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/**
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* struct onenand_chip - OneNAND Private Flash Chip Data
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* @base: [BOARDSPECIFIC] address to access OneNAND
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* @dies: [INTERN][FLEX-ONENAND] number of dies on chip
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* @boundary: [INTERN][FLEX-ONENAND] Boundary of the dies
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* @diesize: [INTERN][FLEX-ONENAND] Size of the dies
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* @chipsize: [INTERN] the size of one chip for multichip arrays
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* FIXME For Flex-OneNAND, chipsize holds maximum possible
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* device size ie when all blocks are considered MLC
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* @device_id: [INTERN] device ID
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* @density_mask: chip density, used for DDP devices
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* @verstion_id: [INTERN] version ID
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* @options: [BOARDSPECIFIC] various chip options. They can
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* partly be set to inform onenand_scan about
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* @erase_shift: [INTERN] number of address bits in a block
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* @page_shift: [INTERN] number of address bits in a page
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* @page_mask: [INTERN] a page per block mask
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* @writesize: [INTERN] a real page size
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* @bufferram_index: [INTERN] BufferRAM index
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* @bufferram: [INTERN] BufferRAM info
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* @readw: [REPLACEABLE] hardware specific function for read short
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* @writew: [REPLACEABLE] hardware specific function for write short
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* @command: [REPLACEABLE] hardware specific function for writing
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* commands to the chip
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* @wait: [REPLACEABLE] hardware specific function for wait on ready
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* @bbt_wait: [REPLACEABLE] hardware specific function for bbt wait on ready
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* @unlock_all: [REPLACEABLE] hardware specific function for unlock all
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* @read_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area
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* @write_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area
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* @read_word: [REPLACEABLE] hardware specific function for read
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* register of OneNAND
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* @write_word: [REPLACEABLE] hardware specific function for write
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* register of OneNAND
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* @mmcontrol: sync burst read function
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* @block_markbad: function to mark a block as bad
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* @scan_bbt: [REPLACEALBE] hardware specific function for scanning
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* Bad block Table
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* @chip_lock: [INTERN] spinlock used to protect access to this
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* structure and the chip
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* @wq: [INTERN] wait queue to sleep on if a OneNAND
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* operation is in progress
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* @state: [INTERN] the current state of the OneNAND device
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* @page_buf: [INTERN] page main data buffer
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* @oob_buf: [INTERN] page oob data buffer
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* @subpagesize: [INTERN] holds the subpagesize
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* @ecclayout: [REPLACEABLE] the default ecc placement scheme
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* @bbm: [REPLACEABLE] pointer to Bad Block Management
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* @priv: [OPTIONAL] pointer to private chip date
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*/
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struct onenand_chip {
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void __iomem *base;
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unsigned dies;
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unsigned boundary[MAX_DIES];
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loff_t diesize[MAX_DIES];
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unsigned int chipsize;
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unsigned int device_id;
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unsigned int version_id;
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unsigned int technology;
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unsigned int density_mask;
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unsigned int options;
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unsigned int erase_shift;
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unsigned int page_shift;
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unsigned int page_mask;
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unsigned int writesize;
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unsigned int bufferram_index;
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struct onenand_bufferram bufferram[MAX_BUFFERRAM];
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int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len);
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int (*wait)(struct mtd_info *mtd, int state);
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int (*bbt_wait)(struct mtd_info *mtd, int state);
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void (*unlock_all)(struct mtd_info *mtd);
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int (*read_bufferram)(struct mtd_info *mtd, int area,
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unsigned char *buffer, int offset, size_t count);
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int (*write_bufferram)(struct mtd_info *mtd, int area,
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const unsigned char *buffer, int offset, size_t count);
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unsigned short (*read_word)(void __iomem *addr);
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void (*write_word)(unsigned short value, void __iomem *addr);
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void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
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int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
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int (*scan_bbt)(struct mtd_info *mtd);
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struct completion complete;
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int irq;
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spinlock_t chip_lock;
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wait_queue_head_t wq;
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flstate_t state;
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unsigned char *page_buf;
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unsigned char *oob_buf;
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#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
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unsigned char *verify_buf;
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#endif
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int subpagesize;
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struct nand_ecclayout *ecclayout;
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void *bbm;
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void *priv;
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};
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/*
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* Helper macros
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*/
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#define ONENAND_PAGES_PER_BLOCK (1<<6)
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#define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
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#define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
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#define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
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#define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1)
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#define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0)
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#define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1)
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#define FLEXONENAND(this) \
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(this->device_id & DEVICE_IS_FLEXONENAND)
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#define ONENAND_GET_SYS_CFG1(this) \
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(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
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#define ONENAND_SET_SYS_CFG1(v, this) \
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(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
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#define ONENAND_IS_DDP(this) \
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(this->device_id & ONENAND_DEVICE_IS_DDP)
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#define ONENAND_IS_MLC(this) \
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(this->technology & ONENAND_TECHNOLOGY_IS_MLC)
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#ifdef CONFIG_MTD_ONENAND_2X_PROGRAM
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#define ONENAND_IS_2PLANE(this) \
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(this->options & ONENAND_HAS_2PLANE)
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#else
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#define ONENAND_IS_2PLANE(this) (0)
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#endif
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/* Check byte access in OneNAND */
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#define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1)
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/*
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* Options bits
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*/
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#define ONENAND_HAS_CONT_LOCK (0x0001)
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#define ONENAND_HAS_UNLOCK_ALL (0x0002)
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#define ONENAND_HAS_2PLANE (0x0004)
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#define ONENAND_HAS_4KB_PAGE (0x0008)
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#define ONENAND_SKIP_UNLOCK_CHECK (0x0100)
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#define ONENAND_PAGEBUF_ALLOC (0x1000)
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#define ONENAND_OOBBUF_ALLOC (0x2000)
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#define ONENAND_IS_4KB_PAGE(this) \
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(this->options & ONENAND_HAS_4KB_PAGE)
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/*
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* OneNAND Flash Manufacturer ID Codes
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*/
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#define ONENAND_MFR_SAMSUNG 0xec
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#define ONENAND_MFR_NUMONYX 0x20
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/**
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* struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
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* @name: Manufacturer name
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* @id: manufacturer ID code of device.
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*/
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struct onenand_manufacturers {
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int id;
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char *name;
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};
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int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
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struct mtd_oob_ops *ops);
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unsigned onenand_block(struct onenand_chip *this, loff_t addr);
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loff_t onenand_addr(struct onenand_chip *this, int block);
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int flexonenand_region(struct mtd_info *mtd, loff_t addr);
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struct mtd_partition;
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struct onenand_platform_data {
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void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
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int (*read_bufferram)(struct mtd_info *mtd, int area,
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unsigned char *buffer, int offset, size_t count);
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struct mtd_partition *parts;
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unsigned int nr_parts;
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};
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#endif /* __LINUX_MTD_ONENAND_H */
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