LXR linux/include/linux/mtd/onenand.h

   1/*
   2 *  linux/include/linux/mtd/onenand.h
   3 *
   4 *  Copyright Â© 2005-2009 Samsung Electronics
   5 *  Kyungmin Park <kyungmin.park@samsung.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#ifndef __LINUX_MTD_ONENAND_H
  13#define __LINUX_MTD_ONENAND_H
  14
  15#include <linux/spinlock.h>
  16#include <linux/completion.h>
  17#include <linux/mtd/flashchip.h>
  18#include <linux/mtd/onenand_regs.h>
  19#include <linux/mtd/bbm.h>
  20
  21#define MAX_DIES                2
  22#define MAX_BUFFERRAM           2
  23
  24/* Scan and identify a OneNAND device */
  25extern int onenand_scan(struct mtd_info *mtd, int max_chips);
  26/* Free resources held by the OneNAND device */
  27extern void onenand_release(struct mtd_info *mtd);
  28
  29/**
  30 * struct onenand_bufferram - OneNAND BufferRAM Data
  31 * @blockpage:          block & page address in BufferRAM
  32 */
  33struct onenand_bufferram {
  34        int     blockpage;
  35};
  36
  37/**
  38 * struct onenand_chip - OneNAND Private Flash Chip Data
  39 * @base:               [BOARDSPECIFIC] address to access OneNAND
  40 * @dies:               [INTERN][FLEX-ONENAND] number of dies on chip
  41 * @boundary:           [INTERN][FLEX-ONENAND] Boundary of the dies
  42 * @diesize:            [INTERN][FLEX-ONENAND] Size of the dies
  43 * @chipsize:           [INTERN] the size of one chip for multichip arrays
  44 *                      FIXME For Flex-OneNAND, chipsize holds maximum possible
  45 *                      device size ie when all blocks are considered MLC
  46 * @device_id:          [INTERN] device ID
  47 * @density_mask:       chip density, used for DDP devices
  48 * @verstion_id:        [INTERN] version ID
  49 * @options:            [BOARDSPECIFIC] various chip options. They can
  50 *                      partly be set to inform onenand_scan about
  51 * @erase_shift:        [INTERN] number of address bits in a block
  52 * @page_shift:         [INTERN] number of address bits in a page
  53 * @page_mask:          [INTERN] a page per block mask
  54 * @writesize:          [INTERN] a real page size
  55 * @bufferram_index:    [INTERN] BufferRAM index
  56 * @bufferram:          [INTERN] BufferRAM info
  57 * @readw:              [REPLACEABLE] hardware specific function for read short
  58 * @writew:             [REPLACEABLE] hardware specific function for write short
  59 * @command:            [REPLACEABLE] hardware specific function for writing
  60 *                      commands to the chip
  61 * @wait:               [REPLACEABLE] hardware specific function for wait on ready
  62 * @bbt_wait:           [REPLACEABLE] hardware specific function for bbt wait on ready
  63 * @unlock_all:         [REPLACEABLE] hardware specific function for unlock all
  64 * @read_bufferram:     [REPLACEABLE] hardware specific function for BufferRAM Area
  65 * @write_bufferram:    [REPLACEABLE] hardware specific function for BufferRAM Area
  66 * @read_word:          [REPLACEABLE] hardware specific function for read
  67 *                      register of OneNAND
  68 * @write_word:         [REPLACEABLE] hardware specific function for write
  69 *                      register of OneNAND
  70 * @mmcontrol:          sync burst read function
  71 * @block_markbad:      function to mark a block as bad
  72 * @scan_bbt:           [REPLACEALBE] hardware specific function for scanning
  73 *                      Bad block Table
  74 * @chip_lock:          [INTERN] spinlock used to protect access to this
  75 *                      structure and the chip
  76 * @wq:                 [INTERN] wait queue to sleep on if a OneNAND
  77 *                      operation is in progress
  78 * @state:              [INTERN] the current state of the OneNAND device
  79 * @page_buf:           [INTERN] page main data buffer
  80 * @oob_buf:            [INTERN] page oob data buffer
  81 * @subpagesize:        [INTERN] holds the subpagesize
  82 * @ecclayout:          [REPLACEABLE] the default ecc placement scheme
  83 * @bbm:                [REPLACEABLE] pointer to Bad Block Management
  84 * @priv:               [OPTIONAL] pointer to private chip date
  85 */
  86struct onenand_chip {
  87        void __iomem            *base;
  88        unsigned                dies;
  89        unsigned                boundary[MAX_DIES];
  90        loff_t                  diesize[MAX_DIES];
  91        unsigned int            chipsize;
  92        unsigned int            device_id;
  93        unsigned int            version_id;
  94        unsigned int            technology;
  95        unsigned int            density_mask;
  96        unsigned int            options;
  97
  98        unsigned int            erase_shift;
  99        unsigned int            page_shift;
 100        unsigned int            page_mask;
 101        unsigned int            writesize;
 102
 103        unsigned int            bufferram_index;
 104        struct onenand_bufferram        bufferram[MAX_BUFFERRAM];
 105
 106        int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len);
 107        int (*wait)(struct mtd_info *mtd, int state);
 108        int (*bbt_wait)(struct mtd_info *mtd, int state);
 109        void (*unlock_all)(struct mtd_info *mtd);
 110        int (*read_bufferram)(struct mtd_info *mtd, int area,
 111                        unsigned char *buffer, int offset, size_t count);
 112        int (*write_bufferram)(struct mtd_info *mtd, int area,
 113                        const unsigned char *buffer, int offset, size_t count);
 114        unsigned short (*read_word)(void __iomem *addr);
 115        void (*write_word)(unsigned short value, void __iomem *addr);
 116        void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
 117        int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
 118        int (*scan_bbt)(struct mtd_info *mtd);
 119
 120        struct completion       complete;
 121        int                     irq;
 122
 123        spinlock_t              chip_lock;
 124        wait_queue_head_t       wq;
 125        flstate_t               state;
 126        unsigned char           *page_buf;
 127        unsigned char           *oob_buf;
 128#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
 129        unsigned char           *verify_buf;
 130#endif
 131
 132        int                     subpagesize;
 133        struct nand_ecclayout   *ecclayout;
 134
 135        void                    *bbm;
 136
 137        void                    *priv;
 138};
 139
 140/*
 141 * Helper macros
 142 */
 143#define ONENAND_PAGES_PER_BLOCK        (1<<6)
 144
 145#define ONENAND_CURRENT_BUFFERRAM(this)         (this->bufferram_index)
 146#define ONENAND_NEXT_BUFFERRAM(this)            (this->bufferram_index ^ 1)
 147#define ONENAND_SET_NEXT_BUFFERRAM(this)        (this->bufferram_index ^= 1)
 148#define ONENAND_SET_PREV_BUFFERRAM(this)        (this->bufferram_index ^= 1)
 149#define ONENAND_SET_BUFFERRAM0(this)            (this->bufferram_index = 0)
 150#define ONENAND_SET_BUFFERRAM1(this)            (this->bufferram_index = 1)
 151
 152#define FLEXONENAND(this)                                               \
 153        (this->device_id & DEVICE_IS_FLEXONENAND)
 154#define ONENAND_GET_SYS_CFG1(this)                                      \
 155        (this->read_word(this->base + ONENAND_REG_SYS_CFG1))
 156#define ONENAND_SET_SYS_CFG1(v, this)                                   \
 157        (this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
 158
 159#define ONENAND_IS_DDP(this)                                            \
 160        (this->device_id & ONENAND_DEVICE_IS_DDP)
 161
 162#define ONENAND_IS_MLC(this)                                            \
 163        (this->technology & ONENAND_TECHNOLOGY_IS_MLC)
 164
 165#ifdef CONFIG_MTD_ONENAND_2X_PROGRAM
 166#define ONENAND_IS_2PLANE(this)                                         \
 167        (this->options & ONENAND_HAS_2PLANE)
 168#else
 169#define ONENAND_IS_2PLANE(this)                 (0)
 170#endif
 171
 172/* Check byte access in OneNAND */
 173#define ONENAND_CHECK_BYTE_ACCESS(addr)         (addr & 0x1)
 174
 175/*
 176 * Options bits
 177 */
 178#define ONENAND_HAS_CONT_LOCK           (0x0001)
 179#define ONENAND_HAS_UNLOCK_ALL          (0x0002)
 180#define ONENAND_HAS_2PLANE              (0x0004)
 181#define ONENAND_HAS_4KB_PAGE            (0x0008)
 182#define ONENAND_SKIP_UNLOCK_CHECK       (0x0100)
 183#define ONENAND_PAGEBUF_ALLOC           (0x1000)
 184#define ONENAND_OOBBUF_ALLOC            (0x2000)
 185
 186#define ONENAND_IS_4KB_PAGE(this)                                       \
 187        (this->options & ONENAND_HAS_4KB_PAGE)
 188
 189/*
 190 * OneNAND Flash Manufacturer ID Codes
 191 */
 192#define ONENAND_MFR_SAMSUNG     0xec
 193#define ONENAND_MFR_NUMONYX     0x20
 194
 195/**
 196 * struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
 197 * @name:       Manufacturer name
 198 * @id:         manufacturer ID code of device.
 199*/
 200struct onenand_manufacturers {
 201        int id;
 202        char *name;
 203};
 204
 205int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 206                         struct mtd_oob_ops *ops);
 207unsigned onenand_block(struct onenand_chip *this, loff_t addr);
 208loff_t onenand_addr(struct onenand_chip *this, int block);
 209int flexonenand_region(struct mtd_info *mtd, loff_t addr);
 210
 211struct mtd_partition;
 212
 213struct onenand_platform_data {
 214        void            (*mmcontrol)(struct mtd_info *mtd, int sync_read);
 215        int             (*read_bufferram)(struct mtd_info *mtd, int area,
 216                        unsigned char *buffer, int offset, size_t count);
 217        struct mtd_partition *parts;
 218        unsigned int    nr_parts;
 219};
 220
 221#endif  /* __LINUX_MTD_ONENAND_H */
 222