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  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef _NAND_H_
  25 #define _NAND_H_
  26
  27 extern void nand_init(void);
  28
  29 #ifndef CFG_NAND_LEGACY
  30 #include <linux/mtd/compat.h>
  31 #include <linux/mtd/mtd.h>
  32 #include <linux/mtd/nand.h>
  33
  34 typedef struct mtd_info nand_info_t;
  35
  36 extern int nand_curr_device;
  37 extern nand_info_t nand_info[];
  38
  39 static inline int nand_read(nand_info_t *info, off_t ofs, size_t *len, u_char *buf)
  40 {
  41         return info->read(info, ofs, *len, (size_t *)len, buf);
  42 }
  43
  44 static inline int nand_write(nand_info_t *info, off_t ofs, size_t *len, u_char *buf)
  45 {
  46         return info->write(info, ofs, *len, (size_t *)len, buf);
  47 }
  48
  49 static inline int nand_block_isbad(nand_info_t *info, off_t ofs)
  50 {
  51         return info->block_isbad(info, ofs);
  52 }
  53
  54 static inline int nand_erase(nand_info_t *info, off_t off, size_t size)
  55 {
  56         struct erase_info instr;
  57
  58         instr.mtd = info;
  59         instr.addr = off;
  60         instr.len = size;
  61         instr.callback = 0;
  62
  63         return info->erase(info, &instr);
  64 }
  65
  66
  67 /*****************************************************************************
  68  * declarations from nand_util.c
  69  ****************************************************************************/
  70
  71 struct nand_write_options {
  72         u_char *buffer;         /* memory block containing image to write */
  73         ulong length;           /* number of bytes to write */
  74         ulong offset;           /* start address in NAND */
  75         int quiet;              /* don't display progress messages */
  76         int autoplace;          /* if true use auto oob layout */
  77         int forcejffs2;         /* force jffs2 oob layout */
  78         int forceyaffs;         /* force yaffs oob layout */
  79         int noecc;              /* write without ecc */
  80         int writeoob;           /* image contains oob data */
  81         int pad;                /* pad to page size */
  82         int blockalign;         /* 1|2|4 set multiple of eraseblocks
  83                                  * to align to */
  84 };
  85
  86 typedef struct nand_write_options nand_write_options_t;
  87 typedef struct mtd_oob_ops mtd_oob_ops_t;
  88
  89 struct nand_read_options {
  90         u_char *buffer;         /* memory block in which read image is written*/
  91         ulong length;           /* number of bytes to read */
  92         ulong offset;           /* start address in NAND */
  93         int quiet;              /* don't display progress messages */
  94         int readoob;            /* put oob data in image */
  95 };
  96
  97 typedef struct nand_read_options nand_read_options_t;
  98
  99 struct nand_erase_options {
 100         ulong length;           /* number of bytes to erase */
 101         ulong offset;           /* first address in NAND to erase */
 102         int quiet;              /* don't display progress messages */
 103         int jffs2;              /* if true: format for jffs2 usage
 104                                  * (write appropriate cleanmarker blocks) */
 105         int scrub;              /* if true, really clean NAND by erasing
 106                                  * bad blocks (UNSAFE) */
 107 };
 108
 109 typedef struct nand_erase_options nand_erase_options_t;
 110
 111 int nand_read_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
 112                        u_char *buffer);
 113 int nand_write_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
 114                         u_char *buffer);
 115 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 116
 117 #define NAND_LOCK_STATUS_TIGHT  0x01
 118 #define NAND_LOCK_STATUS_LOCK   0x02
 119 #define NAND_LOCK_STATUS_UNLOCK 0x04
 120
 121 int nand_lock( nand_info_t *meminfo, int tight );
 122 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
 123 int nand_get_lock_status(nand_info_t *meminfo, ulong offset);
 124
 125 #ifdef CFG_NAND_SELECT_DEVICE
 126 void board_nand_select_device(struct nand_chip *nand, int chip);
 127 #endif
 128
 129 #endif /* !CFG_NAND_LEGACY */
 130 #endif