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Diffstat (limited to 'kernel/include/linux/mtd/onenand.h')
| -rw-r--r-- | kernel/include/linux/mtd/onenand.h | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/kernel/include/linux/mtd/onenand.h b/kernel/include/linux/mtd/onenand.h new file mode 100644 index 000000000..4596503c9 --- /dev/null +++ b/kernel/include/linux/mtd/onenand.h @@ -0,0 +1,242 @@ +/* + * 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 + * @ecclayout: [REPLACEABLE] the default ecc placement scheme + * @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; + struct nand_ecclayout *ecclayout; + + 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 */ |