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