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 CONFIG_NAND_LEGACY
  30 #include <linux/mtd/compat.h>
  31 #include <linux/mtd/mtd.h>
  32 #include <linux/mtd/nand.h>
  33
  34 extern int board_nand_init(struct nand_chip *nand);
  35
  36 typedef struct mtd_info nand_info_t;
  37
  38 extern int nand_curr_device;
  39 extern nand_info_t nand_info[];
  40
  41 static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
  42 {
  43         return info->read(info, ofs, *len, (size_t *)len, buf);
  44 }
  45
  46 static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
  47 {
  48         return info->write(info, ofs, *len, (size_t *)len, buf);
  49 }
  50
  51 static inline int nand_block_isbad(nand_info_t *info, loff_t ofs)
  52 {
  53         return info->block_isbad(info, ofs);
  54 }
  55
  56 static inline int nand_erase(nand_info_t *info, loff_t off, size_t size)
  57 {
  58         struct erase_info instr;
  59
  60         instr.mtd = info;
  61         instr.addr = off;
  62         instr.len = size;
  63         instr.callback = 0;
  64
  65         return info->erase(info, &instr);
  66 }
  67
  68
  69 /*****************************************************************************
  70  * declarations from nand_util.c
  71  ****************************************************************************/
  72
  73 struct nand_write_options {
  74         u_char *buffer;         /* memory block containing image to write */
  75         ulong length;           /* number of bytes to write */
  76         ulong offset;           /* start address in NAND */
  77         int quiet;              /* don't display progress messages */
  78         int autoplace;          /* if true use auto oob layout */
  79         int forcejffs2;         /* force jffs2 oob layout */
  80         int forceyaffs;         /* force yaffs oob layout */
  81         int noecc;              /* write without ecc */
  82         int writeoob;           /* image contains oob data */
  83         int pad;                /* pad to page size */
  84         int blockalign;         /* 1|2|4 set multiple of eraseblocks
  85                                  * to align to */
  86 };
  87
  88 typedef struct nand_write_options nand_write_options_t;
  89 typedef struct mtd_oob_ops mtd_oob_ops_t;
  90
  91 struct nand_read_options {
  92         u_char *buffer;         /* memory block in which read image is written*/
  93         ulong length;           /* number of bytes to read */
  94         ulong offset;           /* start address in NAND */
  95         int quiet;              /* don't display progress messages */
  96         int readoob;            /* put oob data in image */
  97 };
  98
  99 typedef struct nand_read_options nand_read_options_t;
 100
 101 struct nand_erase_options {
 102         ulong length;           /* number of bytes to erase */
 103         ulong offset;           /* first address in NAND to erase */
 104         int quiet;              /* don't display progress messages */
 105         int jffs2;              /* if true: format for jffs2 usage
 106                                  * (write appropriate cleanmarker blocks) */
 107         int scrub;              /* if true, really clean NAND by erasing
 108                                  * bad blocks (UNSAFE) */
 109 };
 110
 111 typedef struct nand_erase_options nand_erase_options_t;
 112
 113 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 114                        u_char *buffer);
 115 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 116                         u_char *buffer);
 117 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 118
 119 #define NAND_LOCK_STATUS_TIGHT  0x01
 120 #define NAND_LOCK_STATUS_LOCK   0x02
 121 #define NAND_LOCK_STATUS_UNLOCK 0x04
 122
 123 int nand_lock( nand_info_t *meminfo, int tight );
 124 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
 125 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
 126
 127 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 128 void board_nand_select_device(struct nand_chip *nand, int chip);
 129 #endif
 130
 131 __attribute__((noreturn)) void nand_boot(void);
 132
 133 #endif /* !CONFIG_NAND_LEGACY */
 134 #endif