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/* 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)
#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 Nand {
char floor, chip;
unsigned long curadr;
unsigned char curmode;
/* Also some erase/write/pipeline info when we get that far */
};
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*);
/*
* Standard NAND flash commands
*/
#define NAND_CMD_READ0 0
#define NAND_CMD_READ1 1
#define NAND_CMD_PAGEPROG 0x10
#define NAND_CMD_READOOB 0x50
#define NAND_CMD_ERASE1 0x60
#define NAND_CMD_STATUS 0x70
#define NAND_CMD_SEQIN 0x80
#define NAND_CMD_READID 0x90
#define NAND_CMD_ERASE2 0xd0
#define NAND_CMD_RESET 0xff
/*
* NAND Flash Manufacturer ID Codes
*/
#define NAND_MFR_TOSHIBA 0x98
#define NAND_MFR_SAMSUNG 0xec
/*
* NAND Flash Device ID Structure
*
* Structure overview:
*
* name - Complete name of device
*
* manufacture_id - manufacturer ID code of device.
*
* model_id - model ID code of device.
*
* chipshift - total number of address bits for the device which
* is used to calculate address offsets and the total
* number of bytes the device is capable of.
*
* page256 - denotes if flash device has 256 byte pages or not.
*
* pageadrlen - number of bytes minus one needed to hold the
* complete address into the flash array. Keep in
* mind that when a read or write is done to a
* specific address, the address is input serially
* 8 bits at a time. This structure member is used
* by the read/write routines as a loop index for
* shifting the address out 8 bits at a time.
*
* erasesize - size of an erase block in the flash device.
*/
struct nand_flash_dev {
char * name;
int manufacture_id;
int model_id;
int chipshift;
char page256;
char pageadrlen;
unsigned long erasesize;
int bus16;
};
#endif /* __MTD_DOC2000_H__ */
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