ea9b6dcc15
Fix some kernel-doc typos/spellos. Use kernel-doc syntax in places where it was almost used. Correct/add struct, struct field, and function param names where needed. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
170 lines
5.2 KiB
C
170 lines
5.2 KiB
C
/*
|
|
* linux/include/linux/mtd/onenand.h
|
|
*
|
|
* Copyright (C) 2005 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/mtd/onenand_regs.h>
|
|
#include <linux/mtd/bbm.h>
|
|
|
|
#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);
|
|
|
|
/*
|
|
* onenand_state_t - chip states
|
|
* Enumeration for OneNAND flash chip state
|
|
*/
|
|
typedef enum {
|
|
FL_READY,
|
|
FL_READING,
|
|
FL_WRITING,
|
|
FL_ERASING,
|
|
FL_SYNCING,
|
|
FL_UNLOCKING,
|
|
FL_LOCKING,
|
|
FL_RESETING,
|
|
FL_OTPING,
|
|
FL_PM_SUSPENDED,
|
|
} onenand_state_t;
|
|
|
|
/**
|
|
* struct onenand_bufferram - OneNAND BufferRAM Data
|
|
* @block: block address in BufferRAM
|
|
* @page: page address in BufferRAM
|
|
* @valid: valid flag
|
|
*/
|
|
struct onenand_bufferram {
|
|
int block;
|
|
int page;
|
|
int valid;
|
|
};
|
|
|
|
/**
|
|
* struct onenand_chip - OneNAND Private Flash Chip Data
|
|
* @base: [BOARDSPECIFIC] address to access OneNAND
|
|
* @chipsize: [INTERN] the size of one chip for multichip arrays
|
|
* @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
|
|
* @ppb_shift: [INTERN] number of address bits in a pages per block
|
|
* @page_mask: [INTERN] a page per block mask
|
|
* @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
|
|
* @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
|
|
* @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: data buffer
|
|
* @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 int chipsize;
|
|
unsigned int device_id;
|
|
unsigned int density_mask;
|
|
unsigned int options;
|
|
|
|
unsigned int erase_shift;
|
|
unsigned int page_shift;
|
|
unsigned int ppb_shift; /* Pages per block shift */
|
|
unsigned int page_mask;
|
|
|
|
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 (*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 (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
|
|
int (*scan_bbt)(struct mtd_info *mtd);
|
|
|
|
spinlock_t chip_lock;
|
|
wait_queue_head_t wq;
|
|
onenand_state_t state;
|
|
unsigned char *page_buf;
|
|
|
|
struct nand_ecclayout *ecclayout;
|
|
|
|
void *bbm;
|
|
|
|
void *priv;
|
|
};
|
|
|
|
/*
|
|
* Helper macros
|
|
*/
|
|
#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_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))
|
|
|
|
/* Check byte access in OneNAND */
|
|
#define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1)
|
|
|
|
/*
|
|
* Options bits
|
|
*/
|
|
#define ONENAND_CONT_LOCK (0x0001)
|
|
#define ONENAND_PAGEBUF_ALLOC (0x1000)
|
|
|
|
/*
|
|
* OneNAND Flash Manufacturer ID Codes
|
|
*/
|
|
#define ONENAND_MFR_SAMSUNG 0xec
|
|
|
|
/**
|
|
* struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
|
|
* @name: Manufacturer name
|
|
* @id: manufacturer ID code of device.
|
|
*/
|
|
struct onenand_manufacturers {
|
|
int id;
|
|
char *name;
|
|
};
|
|
|
|
#endif /* __LINUX_MTD_ONENAND_H */
|