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 #include <linux/mtd/compat.h> 30 #include <linux/mtd/mtd.h> 31 #include <linux/mtd/nand.h> 32 33 #ifdef CONFIG_SYS_NAND_SELF_INIT 34 void board_nand_init(void); 35 int nand_register(int devnum); 36 #else 37 extern int board_nand_init(struct nand_chip *nand); 38 #endif 39 40 typedef struct mtd_info nand_info_t; 41 42 extern int nand_curr_device; 43 extern nand_info_t nand_info[]; 44 45 static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf) 46 { 47 return info->read(info, ofs, *len, (size_t *)len, buf); 48 } 49 50 static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf) 51 { 52 return info->write(info, ofs, *len, (size_t *)len, buf); 53 } 54 55 static inline int nand_block_isbad(nand_info_t *info, loff_t ofs) 56 { 57 return info->block_isbad(info, ofs); 58 } 59 60 static inline int nand_erase(nand_info_t *info, loff_t off, size_t size) 61 { 62 struct erase_info instr; 63 64 instr.mtd = info; 65 instr.addr = off; 66 instr.len = size; 67 instr.callback = 0; 68 69 return info->erase(info, &instr); 70 } 71 72 73 /***************************************************************************** 74 * declarations from nand_util.c 75 ****************************************************************************/ 76 77 struct nand_write_options { 78 u_char *buffer; /* memory block containing image to write */ 79 ulong length; /* number of bytes to write */ 80 ulong offset; /* start address in NAND */ 81 int quiet; /* don't display progress messages */ 82 int autoplace; /* if true use auto oob layout */ 83 int forcejffs2; /* force jffs2 oob layout */ 84 int forceyaffs; /* force yaffs oob layout */ 85 int noecc; /* write without ecc */ 86 int writeoob; /* image contains oob data */ 87 int pad; /* pad to page size */ 88 int blockalign; /* 1|2|4 set multiple of eraseblocks 89 * to align to */ 90 }; 91 92 typedef struct nand_write_options nand_write_options_t; 93 typedef struct mtd_oob_ops mtd_oob_ops_t; 94 95 struct nand_read_options { 96 u_char *buffer; /* memory block in which read image is written*/ 97 ulong length; /* number of bytes to read */ 98 ulong offset; /* start address in NAND */ 99 int quiet; /* don't display progress messages */ 100 int readoob; /* put oob data in image */ 101 }; 102 103 typedef struct nand_read_options nand_read_options_t; 104 105 struct nand_erase_options { 106 loff_t length; /* number of bytes to erase */ 107 loff_t offset; /* first address in NAND to erase */ 108 int quiet; /* don't display progress messages */ 109 int jffs2; /* if true: format for jffs2 usage 110 * (write appropriate cleanmarker blocks) */ 111 int scrub; /* if true, really clean NAND by erasing 112 * bad blocks (UNSAFE) */ 113 114 /* Don't include skipped bad blocks in size to be erased */ 115 int spread; 116 }; 117 118 typedef struct nand_erase_options nand_erase_options_t; 119 120 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, 121 u_char *buffer); 122 123 #define WITH_YAFFS_OOB (1 << 0) /* whether write with yaffs format. This flag 124 * is a 'mode' meaning it cannot be mixed with 125 * other flags */ 126 #define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */ 127 128 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, 129 u_char *buffer, int flags); 130 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts); 131 132 #define NAND_LOCK_STATUS_TIGHT 0x01 133 #define NAND_LOCK_STATUS_LOCK 0x02 134 #define NAND_LOCK_STATUS_UNLOCK 0x04 135 136 int nand_lock( nand_info_t *meminfo, int tight ); 137 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length ); 138 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset); 139 140 int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst); 141 void nand_deselect(void); 142 143 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE 144 void board_nand_select_device(struct nand_chip *nand, int chip); 145 #endif 146 147 __attribute__((noreturn)) void nand_boot(void); 148 149 #endif 150 151 #ifdef CONFIG_ENV_OFFSET_OOB 152 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored 153 as block number*/ 154 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is 155 stored as byte number */ 156 #define ENV_OFFSET_SIZE 8 157 int get_nand_env_oob(nand_info_t *nand, unsigned long *result); 158 #endif 159