include/linux/mtd/onenand.h

   1 /*
   2  *  linux/include/linux/mtd/onenand.h
   3  *
   4  *  Copyright © 2005-2009 Samsung Electronics
   5  *  Kyungmin Park <[email protected]>
   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 */
  25 extern int onenand_scan(struct mtd_info *mtd, int max_chips);
  26 /* Free resources held by the OneNAND device */
  27 extern void onenand_release(struct mtd_info *mtd);
  28
  29 /**
  30  * struct onenand_bufferram - OneNAND BufferRAM Data
  31  * @blockpage:          block & page address in BufferRAM
  32  */
  33 struct 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  */
  86 struct 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
 129         int                     subpagesize;
 130         struct nand_ecclayout   *ecclayout;
 131
 132         void                    *bbm;
 133
 134         void                    *priv;
 135 };
 136
 137 /*
 138  * Helper macros
 139  */
 140 #define ONENAND_PAGES_PER_BLOCK        (1<<6)
 141
 142 #define ONENAND_CURRENT_BUFFERRAM(this)         (this->bufferram_index)
 143 #define ONENAND_NEXT_BUFFERRAM(this)            (this->bufferram_index ^ 1)
 144 #define ONENAND_SET_NEXT_BUFFERRAM(this)        (this->bufferram_index ^= 1)
 145 #define ONENAND_SET_PREV_BUFFERRAM(this)        (this->bufferram_index ^= 1)
 146 #define ONENAND_SET_BUFFERRAM0(this)            (this->bufferram_index = 0)
 147 #define ONENAND_SET_BUFFERRAM1(this)            (this->bufferram_index = 1)
 148
 149 #define FLEXONENAND(this)                                               \
 150         (this->device_id & DEVICE_IS_FLEXONENAND)
 151 #define ONENAND_GET_SYS_CFG1(this)                                      \
 152         (this->read_word(this->base + ONENAND_REG_SYS_CFG1))
 153 #define ONENAND_SET_SYS_CFG1(v, this)                                   \
 154         (this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
 155
 156 #define ONENAND_IS_DDP(this)                                            \
 157         (this->device_id & ONENAND_DEVICE_IS_DDP)
 158
 159 #define ONENAND_IS_MLC(this)                                            \
 160         (this->technology & ONENAND_TECHNOLOGY_IS_MLC)
 161
 162 #ifdef CONFIG_MTD_ONENAND_2X_PROGRAM
 163 #define ONENAND_IS_2PLANE(this)                                         \
 164         (this->options & ONENAND_HAS_2PLANE)
 165 #else
 166 #define ONENAND_IS_2PLANE(this)                 (0)
 167 #endif
 168
 169 /* Check byte access in OneNAND */
 170 #define ONENAND_CHECK_BYTE_ACCESS(addr)         (addr & 0x1)
 171
 172 /*
 173  * Options bits
 174  */
 175 #define ONENAND_HAS_CONT_LOCK           (0x0001)
 176 #define ONENAND_HAS_UNLOCK_ALL          (0x0002)
 177 #define ONENAND_HAS_2PLANE              (0x0004)
 178 #define ONENAND_SKIP_UNLOCK_CHECK       (0x0100)
 179 #define ONENAND_PAGEBUF_ALLOC           (0x1000)
 180 #define ONENAND_OOBBUF_ALLOC            (0x2000)
 181
 182 /*
 183  * OneNAND Flash Manufacturer ID Codes
 184  */
 185 #define ONENAND_MFR_SAMSUNG     0xec
 186 #define ONENAND_MFR_NUMONYX     0x20
 187
 188 /**
 189  * struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
 190  * @name:       Manufacturer name
 191  * @id:         manufacturer ID code of device.
 192 */
 193 struct onenand_manufacturers {
 194         int id;
 195         char *name;
 196 };
 197
 198 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 199                          struct mtd_oob_ops *ops);
 200 unsigned onenand_block(struct onenand_chip *this, loff_t addr);
 201 loff_t onenand_addr(struct onenand_chip *this, int block);
 202 int flexonenand_region(struct mtd_info *mtd, loff_t addr);
 203
 204 struct mtd_partition;
 205
 206 struct onenand_platform_data {
 207         void            (*mmcontrol)(struct mtd_info *mtd, int sync_read);
 208         struct mtd_partition *parts;
 209         unsigned int    nr_parts;
 210 };
 211
 212 #endif  /* __LINUX_MTD_ONENAND_H */