diff options
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/nand.h | 115 |
1 files changed, 113 insertions, 2 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index a3a7ec3..4425187 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -1,10 +1,11 @@ /* - * u-boot/include/linux/mtd/nand.h + * linux/include/linux/mtd/nand.h * * Copyright (c) 2000 David Woodhouse <dwmw2@mvhi.com> * Steven J. Hill <sjhill@cotw.com> + * Thomas Gleixner <gleixner@autronix.de> * - * $Id: nand.h,v 1.8 2000/10/30 17:16:17 sjhill Exp $ + * $Id: nand.h,v 1.13 2002/04/28 13:40:41 gleixner Exp $ * * 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 @@ -23,6 +24,14 @@ * bat later if I did something naughty. * 10-11-2000 SJH Added private NAND flash structure for driver * 10-24-2000 SJH Added prototype for 'nand_scan' function + * 10-29-2001 TG changed nand_chip structure to support + * hardwarespecific function for accessing control lines + * 02-21-2002 TG added support for different read/write adress and + * ready/busy line access function + * 02-26-2002 TG added chip_delay to nand_chip structure to optimize + * command delay times for different chips + * 04-28-2002 TG OOB config defines moved from nand.c to avoid duplicate + * defines in jffs2/wbuf.c */ #ifndef __LINUX_MTD_NAND_H #define __LINUX_MTD_NAND_H @@ -42,6 +51,82 @@ #define NAND_CMD_RESET 0xff /* + * Enumeration for NAND flash chip state + */ +typedef enum { + FL_READY, + FL_READING, + FL_WRITING, + FL_ERASING, + FL_SYNCING +} nand_state_t; + + +/* + * NAND Private Flash Chip Data + * + * Structure overview: + * + * IO_ADDR - address to access the 8 I/O lines of the flash device + * + * hwcontrol - hardwarespecific function for accesing control-lines + * + * dev_ready - hardwarespecific function for accesing device ready/busy line + * + * chip_lock - spinlock used to protect access to this structure + * + * wq - wait queue to sleep on if a NAND operation is in progress + * + * state - give the current state of the NAND device + * + * page_shift - number of address bits in a page (column address bits) + * + * data_buf - data buffer passed to/from MTD user modules + * + * data_cache - data cache for redundant page access and shadow for + * ECC failure + * + * ecc_code_buf - used only for holding calculated or read ECCs for + * a page read or written when ECC is in use + * + * reserved - padding to make structure fall on word boundary if + * when ECC is in use + */ +struct Nand { + char floor, chip; + unsigned long curadr; + unsigned char curmode; + /* Also some erase/write/pipeline info when we get that far */ +}; + +struct nand_chip { + int page_shift; + u_char *data_buf; + u_char *data_cache; + int cache_page; + u_char ecc_code_buf[6]; + u_char reserved[2]; + char ChipID; /* Type of DiskOnChip */ + struct Nand *chips; + int chipshift; + char* chips_name; + unsigned long erasesize; + unsigned long mfr; /* Flash IDs - only one type of flash per device */ + unsigned long id; + char* name; + struct NFTLrecord nftl; + int nftl_found; + int numchips; + char page256; + char pageadrlen; + unsigned long IO_ADDR; /* address to access the 8 I/O lines to the flash device */ + unsigned long totlen; + uint oobblock; // Size of OOB blocks (e.g. 512) + uint oobsize; // Amount of OOB data per block (e.g. 16) + uint eccsize; +}; + +/* * NAND Flash Manufacturer ID Codes */ #define NAND_MFR_TOSHIBA 0x98 @@ -84,4 +169,30 @@ struct nand_flash_dev { unsigned long erasesize; }; +/* +* Constants for oob configuration +*/ +#define NAND_NOOB_ECCPOS0 0 +#define NAND_NOOB_ECCPOS1 1 +#define NAND_NOOB_ECCPOS2 2 +#define NAND_NOOB_ECCPOS3 3 +#define NAND_NOOB_ECCPOS4 4 +#define NAND_NOOB_ECCPOS5 5 +#define NAND_NOOB_BADBPOS -1 +#define NAND_NOOB_ECCVPOS -1 + +#define NAND_JFFS2_OOB_ECCPOS0 0 +#define NAND_JFFS2_OOB_ECCPOS1 1 +#define NAND_JFFS2_OOB_ECCPOS2 2 +#define NAND_JFFS2_OOB_ECCPOS3 3 +#define NAND_JFFS2_OOB_ECCPOS4 6 +#define NAND_JFFS2_OOB_ECCPOS5 7 +#define NAND_JFFS2_OOB_BADBPOS 5 +#define NAND_JFFS2_OOB_ECCVPOS 4 + +#define NAND_JFFS2_OOB8_FSDAPOS 6 +#define NAND_JFFS2_OOB16_FSDAPOS 8 +#define NAND_JFFS2_OOB8_FSDALEN 2 +#define NAND_JFFS2_OOB16_FSDALEN 8 + #endif /* __LINUX_MTD_NAND_H */ |