diff options
Diffstat (limited to 'include/linux/mtd/doc2000.h')
| -rw-r--r-- | include/linux/mtd/doc2000.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/include/linux/mtd/doc2000.h b/include/linux/mtd/doc2000.h new file mode 100644 index 00000000000..c703f77fe14 --- /dev/null +++ b/include/linux/mtd/doc2000.h @@ -0,0 +1,158 @@ + +/* Linux driver for Disk-On-Chip 2000 */ +/* (c) 1999 Machine Vision Holdings, Inc. */ +/* Author: David Woodhouse <dwmw2@mvhi.com> */ +/* $Id: doc2000.h,v 1.15 2001/09/19 00:22:15 dwmw2 Exp $ */ + +#ifndef __MTD_DOC2000_H__ +#define __MTD_DOC2000_H__ + +struct DiskOnChip; + +#include <linux/mtd/nftl.h> + +#define DoC_Sig1 0 +#define DoC_Sig2 1 + +#define DoC_ChipID 0x1000 +#define DoC_DOCStatus 0x1001 +#define DoC_DOCControl 0x1002 +#define DoC_FloorSelect 0x1003 +#define DoC_CDSNControl 0x1004 +#define DoC_CDSNDeviceSelect 0x1005 +#define DoC_ECCConf 0x1006 +#define DoC_2k_ECCStatus 0x1007 + +#define DoC_CDSNSlowIO 0x100d +#define DoC_ECCSyndrome0 0x1010 +#define DoC_ECCSyndrome1 0x1011 +#define DoC_ECCSyndrome2 0x1012 +#define DoC_ECCSyndrome3 0x1013 +#define DoC_ECCSyndrome4 0x1014 +#define DoC_ECCSyndrome5 0x1015 +#define DoC_AliasResolution 0x101b +#define DoC_ConfigInput 0x101c +#define DoC_ReadPipeInit 0x101d +#define DoC_WritePipeTerm 0x101e +#define DoC_LastDataRead 0x101f +#define DoC_NOP 0x1020 + +#define DoC_Mil_CDSN_IO 0x0800 +#define DoC_2k_CDSN_IO 0x1800 + +#define ReadDOC_(adr, reg) ((volatile unsigned char)(*(volatile __u8 *)(((unsigned long)adr)+((reg))))) +#define WriteDOC_(d, adr, reg) do{ *(volatile __u8 *)(((unsigned long)adr)+((reg))) = (__u8)d; eieio();} while(0) + +#define DOC_IOREMAP_LEN 0x4000 + +/* These are provided to directly use the DoC_xxx defines */ +#define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg) +#define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg) + +#define DOC_MODE_RESET 0 +#define DOC_MODE_NORMAL 1 +#define DOC_MODE_RESERVED1 2 +#define DOC_MODE_RESERVED2 3 + +#define DOC_MODE_MDWREN 4 +#define DOC_MODE_CLR_ERR 0x80 + +#define DOC_ChipID_UNKNOWN 0x00 +#define DOC_ChipID_Doc2k 0x20 +#define DOC_ChipID_DocMil 0x30 + +#define CDSN_CTRL_FR_B 0x80 +#define CDSN_CTRL_ECC_IO 0x20 +#define CDSN_CTRL_FLASH_IO 0x10 +#define CDSN_CTRL_WP 0x08 +#define CDSN_CTRL_ALE 0x04 +#define CDSN_CTRL_CLE 0x02 +#define CDSN_CTRL_CE 0x01 + +#define DOC_ECC_RESET 0 +#define DOC_ECC_ERROR 0x80 +#define DOC_ECC_RW 0x20 +#define DOC_ECC__EN 0x08 +#define DOC_TOGGLE_BIT 0x04 +#define DOC_ECC_RESV 0x02 +#define DOC_ECC_IGNORE 0x01 + +/* We have to also set the reserved bit 1 for enable */ +#define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV) +#define DOC_ECC_DIS (DOC_ECC_RESV) + +struct Nand { + char floor, chip; + unsigned long curadr; + unsigned char curmode; + /* Also some erase/write/pipeline info when we get that far */ +}; + +#define MAX_FLOORS 4 +#define MAX_CHIPS 4 + +#define MAX_FLOORS_MIL 4 +#define MAX_CHIPS_MIL 1 + +#define ADDR_COLUMN 1 +#define ADDR_PAGE 2 +#define ADDR_COLUMN_PAGE 3 + +struct DiskOnChip { + unsigned long physadr; + unsigned long virtadr; + unsigned long totlen; + char* name; + char ChipID; /* Type of DiskOnChip */ + int ioreg; + + char* chips_name; + unsigned long mfr; /* Flash IDs - only one type of flash per device */ + unsigned long id; + int chipshift; + char page256; + char pageadrlen; + unsigned long erasesize; + + int curfloor; + int curchip; + + int numchips; + struct Nand *chips; + + int nftl_found; + struct NFTLrecord nftl; +}; + +#define SECTORSIZE 512 + +/* Return codes from doc_write(), doc_read(), and doc_erase(). + */ +#define DOC_OK 0 +#define DOC_EIO 1 +#define DOC_EINVAL 2 +#define DOC_EECC 3 +#define DOC_ETIMEOUT 4 + +/* + * Function Prototypes + */ +int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]); + +int doc_rw(struct DiskOnChip* this, int cmd, loff_t from, size_t len, + size_t *retlen, u_char *buf); +int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len, + size_t *retlen, u_char *buf, u_char *eccbuf); +int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len, + size_t *retlen, const u_char *buf, u_char *eccbuf); +int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len, + size_t *retlen, u_char *buf); +int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len, + size_t *retlen, const u_char *buf); +int doc_erase (struct DiskOnChip* this, loff_t ofs, size_t len); + +void doc_probe(unsigned long physadr); + +void doc_print(struct DiskOnChip*); + +#endif /* __MTD_DOC2000_H__ */ |