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 <config.h> 28 29 /* 30 * All boards using a given driver must convert to self-init 31 * at the same time, so do it here. When all drivers are 32 * converted, this will go away. 33 */ 34 #if defined(CONFIG_NAND_FSL_ELBC) || defined(CONFIG_NAND_ATMEL)\ 35 || defined(CONFIG_NAND_FSL_IFC) 36 #define CONFIG_SYS_NAND_SELF_INIT 37 #endif 38 39 extern void nand_init(void); 40 41 #include <linux/compat.h> 42 #include <linux/mtd/mtd.h> 43 #include <linux/mtd/nand.h> 44 45 #ifdef CONFIG_SYS_NAND_SELF_INIT 46 void board_nand_init(void); 47 int nand_register(int devnum); 48 #else 49 extern int board_nand_init(struct nand_chip *nand); 50 #endif 51 52 typedef struct mtd_info nand_info_t; 53 54 extern int nand_curr_device; 55 extern nand_info_t nand_info[]; 56 57 static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf) 58 { 59 return mtd_read(info, ofs, *len, (size_t *)len, buf); 60 } 61 62 static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf) 63 { 64 return mtd_write(info, ofs, *len, (size_t *)len, buf); 65 } 66 67 static inline int nand_block_isbad(nand_info_t *info, loff_t ofs) 68 { 69 return mtd_block_isbad(info, ofs); 70 } 71 72 static inline int nand_erase(nand_info_t *info, loff_t off, size_t size) 73 { 74 struct erase_info instr; 75 76 instr.mtd = info; 77 instr.addr = off; 78 instr.len = size; 79 instr.callback = 0; 80 81 return mtd_erase(info, &instr); 82 } 83 84 85 /***************************************************************************** 86 * declarations from nand_util.c 87 ****************************************************************************/ 88 89 struct nand_write_options { 90 u_char *buffer; /* memory block containing image to write */ 91 ulong length; /* number of bytes to write */ 92 ulong offset; /* start address in NAND */ 93 int quiet; /* don't display progress messages */ 94 int autoplace; /* if true use auto oob layout */ 95 int forcejffs2; /* force jffs2 oob layout */ 96 int forceyaffs; /* force yaffs oob layout */ 97 int noecc; /* write without ecc */ 98 int writeoob; /* image contains oob data */ 99 int pad; /* pad to page size */ 100 int blockalign; /* 1|2|4 set multiple of eraseblocks 101 * to align to */ 102 }; 103 104 typedef struct nand_write_options nand_write_options_t; 105 typedef struct mtd_oob_ops mtd_oob_ops_t; 106 107 struct nand_read_options { 108 u_char *buffer; /* memory block in which read image is written*/ 109 ulong length; /* number of bytes to read */ 110 ulong offset; /* start address in NAND */ 111 int quiet; /* don't display progress messages */ 112 int readoob; /* put oob data in image */ 113 }; 114 115 typedef struct nand_read_options nand_read_options_t; 116 117 struct nand_erase_options { 118 loff_t length; /* number of bytes to erase */ 119 loff_t offset; /* first address in NAND to erase */ 120 int quiet; /* don't display progress messages */ 121 int jffs2; /* if true: format for jffs2 usage 122 * (write appropriate cleanmarker blocks) */ 123 int scrub; /* if true, really clean NAND by erasing 124 * bad blocks (UNSAFE) */ 125 126 /* Don't include skipped bad blocks in size to be erased */ 127 int spread; 128 }; 129 130 typedef struct nand_erase_options nand_erase_options_t; 131 132 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, 133 size_t *actual, loff_t lim, u_char *buffer); 134 135 #define WITH_YAFFS_OOB (1 << 0) /* whether write with yaffs format. This flag 136 * is a 'mode' meaning it cannot be mixed with 137 * other flags */ 138 #define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */ 139 140 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, 141 size_t *actual, loff_t lim, u_char *buffer, int flags); 142 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts); 143 int nand_torture(nand_info_t *nand, loff_t offset); 144 145 #define NAND_LOCK_STATUS_TIGHT 0x01 146 #define NAND_LOCK_STATUS_UNLOCK 0x04 147 148 int nand_lock(nand_info_t *meminfo, int tight); 149 int nand_unlock(nand_info_t *meminfo, loff_t start, size_t length, 150 int allexcept); 151 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset); 152 153 int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst); 154 void nand_deselect(void); 155 156 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE 157 void board_nand_select_device(struct nand_chip *nand, int chip); 158 #endif 159 160 __attribute__((noreturn)) void nand_boot(void); 161 162 #endif 163 164 #ifdef CONFIG_ENV_OFFSET_OOB 165 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored 166 as block number*/ 167 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is 168 stored as byte number */ 169 #define ENV_OFFSET_SIZE 8 170 int get_nand_env_oob(nand_info_t *nand, unsigned long *result); 171 #endif 172