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https://github.com/brain-hackers/u-boot-brain
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cfa460adfd
A lot changed in the Linux MTD code, since it was last ported from Linux to U-Boot. This patch takes U-Boot NAND support to the level of Linux 2.6.22.1 and will enable support for very large NAND devices (4KB pages) and ease the compatibility between U-Boot and Linux filesystems. This patch is tested on two custom boards with PPC and ARM processors running YAFFS in U-Boot and Linux using gcc-4.1.2 cross compilers. MAKEALL ppc/arm has some issues: * DOC/OneNand/nand_spl is not building (I have not tried porting these parts, and since I do not have any HW and I am not familiar with this code/HW I think its best left to someone else.) Except for the issues mentioned above, I have ported all drivers necessary to run MAKEALL ppc/arm without errors and warnings. Many drivers were trivial to port, but some were not so trivial. The following drivers must be examined carefully and maybe rewritten to some degree: cpu/ppc4xx/ndfc.c cpu/arm926ejs/davinci/nand.c board/delta/nand.c board/zylonite/nand.c Signed-off-by: William Juul <william.juul@tandberg.com> Signed-off-by: Stig Olsen <stig.olsen@tandberg.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/*
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* (C) Copyright 2005
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* 2N Telekomunikace, a.s. <www.2n.cz>
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* Ladislav Michl <michl@2n.cz>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _NAND_H_
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#define _NAND_H_
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extern void nand_init(void);
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#ifndef CFG_NAND_LEGACY
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#include <linux/mtd/compat.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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typedef struct mtd_info nand_info_t;
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extern int nand_curr_device;
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extern nand_info_t nand_info[];
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static inline int nand_read(nand_info_t *info, off_t ofs, size_t *len, u_char *buf)
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{
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return info->read(info, ofs, *len, (size_t *)len, buf);
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}
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static inline int nand_write(nand_info_t *info, off_t ofs, size_t *len, u_char *buf)
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{
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return info->write(info, ofs, *len, (size_t *)len, buf);
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}
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static inline int nand_block_isbad(nand_info_t *info, off_t ofs)
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{
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return info->block_isbad(info, ofs);
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}
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static inline int nand_erase(nand_info_t *info, off_t off, size_t size)
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{
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struct erase_info instr;
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instr.mtd = info;
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instr.addr = off;
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instr.len = size;
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instr.callback = 0;
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return info->erase(info, &instr);
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}
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/*****************************************************************************
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* declarations from nand_util.c
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****************************************************************************/
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struct nand_write_options {
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u_char *buffer; /* memory block containing image to write */
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ulong length; /* number of bytes to write */
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ulong offset; /* start address in NAND */
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int quiet; /* don't display progress messages */
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int autoplace; /* if true use auto oob layout */
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int forcejffs2; /* force jffs2 oob layout */
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int forceyaffs; /* force yaffs oob layout */
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int noecc; /* write without ecc */
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int writeoob; /* image contains oob data */
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int pad; /* pad to page size */
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int blockalign; /* 1|2|4 set multiple of eraseblocks
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* to align to */
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};
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typedef struct nand_write_options nand_write_options_t;
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typedef struct mtd_oob_ops mtd_oob_ops_t;
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struct nand_read_options {
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u_char *buffer; /* memory block in which read image is written*/
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ulong length; /* number of bytes to read */
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ulong offset; /* start address in NAND */
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int quiet; /* don't display progress messages */
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int readoob; /* put oob data in image */
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};
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typedef struct nand_read_options nand_read_options_t;
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struct nand_erase_options {
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ulong length; /* number of bytes to erase */
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ulong offset; /* first address in NAND to erase */
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int quiet; /* don't display progress messages */
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int jffs2; /* if true: format for jffs2 usage
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* (write appropriate cleanmarker blocks) */
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int scrub; /* if true, really clean NAND by erasing
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* bad blocks (UNSAFE) */
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};
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typedef struct nand_erase_options nand_erase_options_t;
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int nand_write_opts(nand_info_t *mtd, loff_t to, mtd_oob_ops_t *ops);
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int nand_read_opts(nand_info_t *meminfo, const nand_read_options_t *opts);
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int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
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#define NAND_LOCK_STATUS_TIGHT 0x01
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#define NAND_LOCK_STATUS_LOCK 0x02
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#define NAND_LOCK_STATUS_UNLOCK 0x04
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int nand_lock( nand_info_t *meminfo, int tight );
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int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
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int nand_get_lock_status(nand_info_t *meminfo, ulong offset);
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#ifdef CFG_NAND_SELECT_DEVICE
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void board_nand_select_device(struct nand_chip *nand, int chip);
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#endif
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#endif /* !CFG_NAND_LEGACY */
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#endif
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