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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 1.12 2000/11/03 12:43:43 dwmw2 Exp $ */
#ifndef __MTD_DOC2000_H__
#define __MTD_DOC2000_H__
#include <linux/mtd/mtd.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
/* How to access the device?
* On ARM, it'll be mmap'd directly with 32-bit wide accesses.
* On PPC, it's mmap'd and 16-bit wide.
* Others use readb/writeb
*/
#if defined(__arm__)
#define ReadDOC_(adr, reg) ((unsigned char)(*(__u32 *)(((unsigned long)adr)+(reg<<2))))
#define WriteDOC_(d, adr, reg) do{ *(__u32 *)(((unsigned long)adr)+(reg<<2)) = (__u32)d} while(0)
#elif defined(__ppc__)
#define ReadDOC_(adr, reg) ((unsigned char)(*(__u16 *)(((unsigned long)adr)+(reg<<1))))
#define WriteDOC_(d, adr, reg) do{ *(__u16 *)(((unsigned long)adr)+(reg<<1)) = (__u16)d} while(0)
#else
#define ReadDOC_(adr, reg) readb(((unsigned long)adr) + reg)
#define WriteDOC_(d, adr, reg) writeb(d, ((unsigned long)adr) + reg)
#endif
#if defined(__i386__)
#define USE_MEMCPY
#endif
/* 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_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 ChipID; /* Type of DiskOnChip */
int ioreg;
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;
struct mtd_info *nextdoc;
};
int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);
#endif /* __MTD_DOC2000_H__ */
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