/* * (C) Copyright 2005 * 2N Telekomunikace, a.s. <www.2n.cz> * Ladislav Michl <michl@2n.cz> * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #ifndef _NAND_H_ #define _NAND_H_ extern void nand_init(void); #include <linux/mtd/compat.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> extern int board_nand_init(struct nand_chip *nand); typedef struct mtd_info nand_info_t; extern int nand_curr_device; extern nand_info_t nand_info[]; static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf) { return info->read(info, ofs, *len, (size_t *)len, buf); } static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf) { return info->write(info, ofs, *len, (size_t *)len, buf); } static inline int nand_block_isbad(nand_info_t *info, loff_t ofs) { return info->block_isbad(info, ofs); } static inline int nand_erase(nand_info_t *info, loff_t off, size_t size) { struct erase_info instr; instr.mtd = info; instr.addr = off; instr.len = size; instr.callback = 0; return info->erase(info, &instr); } /***************************************************************************** * declarations from nand_util.c ****************************************************************************/ struct nand_write_options { u_char *buffer; /* memory block containing image to write */ ulong length; /* number of bytes to write */ ulong offset; /* start address in NAND */ int quiet; /* don't display progress messages */ int autoplace; /* if true use auto oob layout */ int forcejffs2; /* force jffs2 oob layout */ int forceyaffs; /* force yaffs oob layout */ int noecc; /* write without ecc */ int writeoob; /* image contains oob data */ int pad; /* pad to page size */ int blockalign; /* 1|2|4 set multiple of eraseblocks * to align to */ }; typedef struct nand_write_options nand_write_options_t; typedef struct mtd_oob_ops mtd_oob_ops_t; struct nand_read_options { u_char *buffer; /* memory block in which read image is written*/ ulong length; /* number of bytes to read */ ulong offset; /* start address in NAND */ int quiet; /* don't display progress messages */ int readoob; /* put oob data in image */ }; typedef struct nand_read_options nand_read_options_t; struct nand_erase_options { ulong length; /* number of bytes to erase */ ulong offset; /* first address in NAND to erase */ int quiet; /* don't display progress messages */ int jffs2; /* if true: format for jffs2 usage * (write appropriate cleanmarker blocks) */ int scrub; /* if true, really clean NAND by erasing * bad blocks (UNSAFE) */ }; typedef struct nand_erase_options nand_erase_options_t; int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, u_char *buffer); int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, u_char *buffer); int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts); #define NAND_LOCK_STATUS_TIGHT 0x01 #define NAND_LOCK_STATUS_LOCK 0x02 #define NAND_LOCK_STATUS_UNLOCK 0x04 int nand_lock( nand_info_t *meminfo, int tight ); int nand_unlock( nand_info_t *meminfo, ulong start, ulong length ); int nand_get_lock_status(nand_info_t *meminfo, loff_t offset); #ifdef CONFIG_SYS_NAND_SELECT_DEVICE void board_nand_select_device(struct nand_chip *nand, int chip); #endif __attribute__((noreturn)) void nand_boot(void); #endif #ifdef CONFIG_ENV_OFFSET_OOB #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored as block number*/ #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is stored as byte number */ #define ENV_OFFSET_SIZE 8 int get_nand_env_oob(nand_info_t *nand, unsigned long *result); #endif