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 #include <linux/mtd/compat.h>
  28 #include <linux/mtd/mtd.h>
  29 #include <linux/mtd/nand.h>
  30
  31 typedef struct mtd_info nand_info_t;
  32
  33 extern int nand_curr_device;
  34 extern nand_info_t nand_info[];
  35 extern void nand_init(void);
  36
  37 static inline int nand_read(nand_info_t *info, ulong ofs, ulong *len, u_char *buf)
  38 {
  39         return info->read(info, ofs, *len, (size_t *)len, buf);
  40 }
  41
  42 static inline int nand_write(nand_info_t *info, ulong ofs, ulong *len, u_char *buf)
  43 {
  44         return info->write(info, ofs, *len, (size_t *)len, buf);
  45 }
  46
  47 static inline int nand_block_isbad(nand_info_t *info, ulong ofs)
  48 {
  49         return info->block_isbad(info, ofs);
  50 }
  51
  52 static inline int nand_erase(nand_info_t *info, ulong off, ulong size)
  53 {
  54         struct erase_info instr;
  55
  56         instr.mtd = info;
  57         instr.addr = off;
  58         instr.len = size;
  59         instr.callback = 0;
  60
  61         return info->erase(info, &instr);
  62 }
  63
  64
  65 /*****************************************************************************
  66  * declarations from nand_util.c
  67  ****************************************************************************/
  68
  69 struct nand_write_options {
  70         u_char *buffer;         /* memory block containing image to write */
  71         ulong length;           /* number of bytes to write */
  72         ulong offset;           /* start address in NAND */
  73         int quiet;              /* don't display progress messages */
  74         int autoplace;          /* if true use auto oob layout */
  75         int forcejffs2;         /* force jffs2 oob layout */
  76         int forceyaffs;         /* force yaffs oob layout */
  77         int noecc;              /* write without ecc */
  78         int writeoob;           /* image contains oob data */
  79         int pad;                /* pad to page size */
  80         int blockalign;         /* 1|2|4 set multiple of eraseblocks
  81                                  * to align to */
  82 };
  83
  84 typedef struct nand_write_options nand_write_options_t;
  85
  86 struct nand_read_options {
  87         u_char *buffer;         /* memory block in which read image is written*/
  88         ulong length;           /* number of bytes to read */
  89         ulong offset;           /* start address in NAND */
  90         int quiet;              /* don't display progress messages */
  91         int readoob;            /* put oob data in image */
  92 };
  93
  94 typedef struct nand_read_options nand_read_options_t;
  95
  96 struct nand_erase_options {
  97         ulong length;           /* number of bytes to erase */
  98         ulong offset;           /* first address in NAND to erase */
  99         int quiet;              /* don't display progress messages */
 100         int jffs2;              /* if true: format for jffs2 usage
 101                                  * (write appropriate cleanmarker blocks) */
 102         int scrub;              /* if true, really clean NAND by erasing
 103                                  * bad blocks (UNSAFE) */
 104 };
 105
 106 typedef struct nand_erase_options nand_erase_options_t;
 107
 108 int nand_write_opts(nand_info_t *meminfo, const nand_write_options_t *opts);
 109
 110 int nand_read_opts(nand_info_t *meminfo, const nand_read_options_t *opts);
 111 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 112
 113 #define NAND_LOCK_STATUS_TIGHT  0x01
 114 #define NAND_LOCK_STATUS_LOCK   0x02
 115 #define NAND_LOCK_STATUS_UNLOCK 0x04
 116
 117 int nand_lock( nand_info_t *meminfo, int tight );
 118 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
 119 int nand_get_lock_status(nand_info_t *meminfo, ulong offset);
 120
 121 #ifdef CFG_NAND_SELECT_DEVICE
 122 void board_nand_select_device(struct nand_chip *nand, int chip);
 123 #endif
 124
 125 #endif