include/nand.h

   1 /*
   2  * (C) Copyright 2005
   3  * 2N Telekomunikace, a.s. <www.2n.cz>
   4  * Ladislav Michl <michl@2n.cz>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  */
  13
  14 #ifndef _NAND_H_
  15 #define _NAND_H_
  16
  17 #include <config.h>
  18
  19 /*
  20  * All boards using a given driver must convert to self-init
  21  * at the same time, so do it here.  When all drivers are
  22  * converted, this will go away.
  23  */
  24 #if defined(CONFIG_NAND_FSL_ELBC) || defined(CONFIG_NAND_ATMEL)\
  25         || defined(CONFIG_NAND_FSL_IFC)
  26 #define CONFIG_SYS_NAND_SELF_INIT
  27 #endif
  28
  29 extern void nand_init(void);
  30
  31 #include <linux/compat.h>
  32 #include <linux/mtd/mtd.h>
  33 #include <linux/mtd/nand.h>
  34
  35 #ifdef CONFIG_SYS_NAND_SELF_INIT
  36 void board_nand_init(void);
  37 int nand_register(int devnum);
  38 #else
  39 extern int board_nand_init(struct nand_chip *nand);
  40 #endif
  41
  42 typedef struct mtd_info nand_info_t;
  43
  44 extern int nand_curr_device;
  45 extern nand_info_t nand_info[];
  46
  47 static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
  48 {
  49         return mtd_read(info, ofs, *len, (size_t *)len, buf);
  50 }
  51
  52 static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
  53 {
  54         return mtd_write(info, ofs, *len, (size_t *)len, buf);
  55 }
  56
  57 static inline int nand_block_isbad(nand_info_t *info, loff_t ofs)
  58 {
  59         return mtd_block_isbad(info, ofs);
  60 }
  61
  62 static inline int nand_erase(nand_info_t *info, loff_t off, size_t size)
  63 {
  64         struct erase_info instr;
  65
  66         instr.mtd = info;
  67         instr.addr = off;
  68         instr.len = size;
  69         instr.callback = 0;
  70
  71         return mtd_erase(info, &instr);
  72 }
  73
  74
  75 /*****************************************************************************
  76  * declarations from nand_util.c
  77  ****************************************************************************/
  78
  79 struct nand_write_options {
  80         u_char *buffer;         /* memory block containing image to write */
  81         ulong length;           /* number of bytes to write */
  82         ulong offset;           /* start address in NAND */
  83         int quiet;              /* don't display progress messages */
  84         int autoplace;          /* if true use auto oob layout */
  85         int forcejffs2;         /* force jffs2 oob layout */
  86         int forceyaffs;         /* force yaffs oob layout */
  87         int noecc;              /* write without ecc */
  88         int writeoob;           /* image contains oob data */
  89         int pad;                /* pad to page size */
  90         int blockalign;         /* 1|2|4 set multiple of eraseblocks
  91                                  * to align to */
  92 };
  93
  94 typedef struct nand_write_options nand_write_options_t;
  95 typedef struct mtd_oob_ops mtd_oob_ops_t;
  96
  97 struct nand_read_options {
  98         u_char *buffer;         /* memory block in which read image is written*/
  99         ulong length;           /* number of bytes to read */
 100         ulong offset;           /* start address in NAND */
 101         int quiet;              /* don't display progress messages */
 102         int readoob;            /* put oob data in image */
 103 };
 104
 105 typedef struct nand_read_options nand_read_options_t;
 106
 107 struct nand_erase_options {
 108         loff_t length;          /* number of bytes to erase */
 109         loff_t offset;          /* first address in NAND to erase */
 110         int quiet;              /* don't display progress messages */
 111         int jffs2;              /* if true: format for jffs2 usage
 112                                  * (write appropriate cleanmarker blocks) */
 113         int scrub;              /* if true, really clean NAND by erasing
 114                                  * bad blocks (UNSAFE) */
 115
 116         /* Don't include skipped bad blocks in size to be erased */
 117         int spread;
 118         /* maximum size that actual may be in order to not exceed the buf */
 119         loff_t lim;
 120 };
 121
 122 typedef struct nand_erase_options nand_erase_options_t;
 123
 124 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 125                        size_t *actual, loff_t lim, u_char *buffer);
 126
 127 #define WITH_YAFFS_OOB  (1 << 0) /* whether write with yaffs format. This flag
 128                                   * is a 'mode' meaning it cannot be mixed with
 129                                   * other flags */
 130 #define WITH_DROP_FFS   (1 << 1) /* drop trailing all-0xff pages */
 131
 132 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 133                         size_t *actual, loff_t lim, u_char *buffer, int flags);
 134 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 135 int nand_torture(nand_info_t *nand, loff_t offset);
 136
 137 #define NAND_LOCK_STATUS_TIGHT  0x01
 138 #define NAND_LOCK_STATUS_UNLOCK 0x04
 139
 140 int nand_lock(nand_info_t *meminfo, int tight);
 141 int nand_unlock(nand_info_t *meminfo, loff_t start, size_t length,
 142         int allexcept);
 143 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
 144
 145 int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst);
 146 void nand_deselect(void);
 147
 148 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 149 void board_nand_select_device(struct nand_chip *nand, int chip);
 150 #endif
 151
 152 __attribute__((noreturn)) void nand_boot(void);
 153
 154 #endif
 155
 156 #ifdef CONFIG_ENV_OFFSET_OOB
 157 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
 158                                     as block number*/
 159 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
 160                                         stored as byte number */
 161 #define ENV_OFFSET_SIZE 8
 162 int get_nand_env_oob(nand_info_t *nand, unsigned long *result);
 163 #endif