include/linux/mtd/doc2000.h - linux/kernel/git/viro/vfs - Git at Google

 /*
  * Linux driver for Disk-On-Chip devices
  *
  * Copyright © 1999 Machine Vision Holdings, Inc.
  * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
  * Copyright © 2002-2003 Greg Ungerer <gerg@snapgear.com>
  * Copyright © 2002-2003 SnapGear Inc
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */

 #ifndef __MTD_DOC2000_H__
 #define __MTD_DOC2000_H__

 #include <linux/mtd/mtd.h>
 #include <linux/mutex.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 DoC_Mplus_NOP			0x1002
 #define DoC_Mplus_AliasResolution	0x1004
 #define DoC_Mplus_DOCControl		0x1006
 #define DoC_Mplus_AccessStatus		0x1008
 #define DoC_Mplus_DeviceSelect		0x1008
 #define DoC_Mplus_Configuration		0x100a
 #define DoC_Mplus_OutputControl		0x100c
 #define DoC_Mplus_FlashControl		0x1020
 #define DoC_Mplus_FlashSelect 		0x1022
 #define DoC_Mplus_FlashCmd		0x1024
 #define DoC_Mplus_FlashAddress		0x1026
 #define DoC_Mplus_FlashData0		0x1028
 #define DoC_Mplus_FlashData1		0x1029
 #define DoC_Mplus_ReadPipeInit		0x102a
 #define DoC_Mplus_LastDataRead		0x102c
 #define DoC_Mplus_LastDataRead1		0x102d
 #define DoC_Mplus_WritePipeTerm 	0x102e
 #define DoC_Mplus_ECCSyndrome0		0x1040
 #define DoC_Mplus_ECCSyndrome1		0x1041
 #define DoC_Mplus_ECCSyndrome2		0x1042
 #define DoC_Mplus_ECCSyndrome3		0x1043
 #define DoC_Mplus_ECCSyndrome4		0x1044
 #define DoC_Mplus_ECCSyndrome5		0x1045
 #define DoC_Mplus_ECCConf 		0x1046
 #define DoC_Mplus_Toggle		0x1046
 #define DoC_Mplus_DownloadStatus	0x1074
 #define DoC_Mplus_CtrlConfirm		0x1076
 #define DoC_Mplus_Power			0x1fff

 /* 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)(*(volatile __u32 *)(((unsigned long)adr)+((reg)<<2))))
 #define WriteDOC_(d, adr, reg)  do{ *(volatile __u32 *)(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0)
 #define DOC_IOREMAP_LEN 0x8000
 #elif defined(__ppc__)
 #define ReadDOC_(adr, reg)      ((unsigned char)(*(volatile __u16 *)(((unsigned long)adr)+((reg)<<1))))
 #define WriteDOC_(d, adr, reg)  do{ *(volatile __u16 *)(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0)
 #define DOC_IOREMAP_LEN 0x4000
 #else
 #define ReadDOC_(adr, reg)      readb((void __iomem *)(adr) + (reg))
 #define WriteDOC_(d, adr, reg)  writeb(d, (void __iomem *)(adr) + (reg))
 #define DOC_IOREMAP_LEN 0x2000

 #endif

 #if defined(__i386__) || defined(__x86_64__)
 #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_CLR_ERR 	0x80
 #define	DOC_MODE_RST_LAT	0x10
 #define	DOC_MODE_BDECT		0x08
 #define DOC_MODE_MDWREN 	0x04

 #define DOC_ChipID_Doc2k 	0x20
 #define DOC_ChipID_Doc2kTSOP 	0x21	/* internal number for MTD */
 #define DOC_ChipID_DocMil 	0x30
 #define DOC_ChipID_DocMilPlus32	0x40
 #define DOC_ChipID_DocMilPlus16	0x41

 #define CDSN_CTRL_FR_B 		0x80
 #define CDSN_CTRL_FR_B0		0x40
 #define CDSN_CTRL_FR_B1		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

 #define DOC_FLASH_CE		0x80
 #define DOC_FLASH_WP		0x40
 #define DOC_FLASH_BANK		0x02

 /* 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 1
 #define MAX_CHIPS_MIL 1

 #define MAX_FLOORS_MPLUS 2
 #define MAX_CHIPS_MPLUS 1

 #define ADDR_COLUMN 1
 #define ADDR_PAGE 2
 #define ADDR_COLUMN_PAGE 3

 struct DiskOnChip {
 	unsigned long physadr;
 	void __iomem *virtadr;
 	unsigned long totlen;
 	unsigned 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;
 	char interleave; /* Internal interleaving - Millennium Plus style */
 	unsigned long erasesize;

 	int curfloor;
 	int curchip;

 	int numchips;
 	struct Nand *chips;
 	struct mtd_info *nextdoc;
 	struct mutex lock;
 };

 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);

 #endif /* __MTD_DOC2000_H__ */
	/*
	* Linux driver for Disk-On-Chip devices
	*
	* Copyright © 1999 Machine Vision Holdings, Inc.
	* Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
	* Copyright © 2002-2003 Greg Ungerer <gerg@snapgear.com>
	* Copyright © 2002-2003 SnapGear Inc
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*
	*/

	#ifndef __MTD_DOC2000_H__
	#define __MTD_DOC2000_H__

	#include <linux/mtd/mtd.h>
	#include <linux/mutex.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 DoC_Mplus_NOP 0x1002
	#define DoC_Mplus_AliasResolution 0x1004
	#define DoC_Mplus_DOCControl 0x1006
	#define DoC_Mplus_AccessStatus 0x1008
	#define DoC_Mplus_DeviceSelect 0x1008
	#define DoC_Mplus_Configuration 0x100a
	#define DoC_Mplus_OutputControl 0x100c
	#define DoC_Mplus_FlashControl 0x1020
	#define DoC_Mplus_FlashSelect 0x1022
	#define DoC_Mplus_FlashCmd 0x1024
	#define DoC_Mplus_FlashAddress 0x1026
	#define DoC_Mplus_FlashData0 0x1028
	#define DoC_Mplus_FlashData1 0x1029
	#define DoC_Mplus_ReadPipeInit 0x102a
	#define DoC_Mplus_LastDataRead 0x102c
	#define DoC_Mplus_LastDataRead1 0x102d
	#define DoC_Mplus_WritePipeTerm 0x102e
	#define DoC_Mplus_ECCSyndrome0 0x1040
	#define DoC_Mplus_ECCSyndrome1 0x1041
	#define DoC_Mplus_ECCSyndrome2 0x1042
	#define DoC_Mplus_ECCSyndrome3 0x1043
	#define DoC_Mplus_ECCSyndrome4 0x1044
	#define DoC_Mplus_ECCSyndrome5 0x1045
	#define DoC_Mplus_ECCConf 0x1046
	#define DoC_Mplus_Toggle 0x1046
	#define DoC_Mplus_DownloadStatus 0x1074
	#define DoC_Mplus_CtrlConfirm 0x1076
	#define DoC_Mplus_Power 0x1fff

	/* 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)((volatile __u32 )(((unsigned long)adr)+((reg)<<2))))
	#define WriteDOC_(d, adr, reg) do{ (volatile __u32 )(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0)
	#define DOC_IOREMAP_LEN 0x8000
	#elif defined(__ppc__)
	#define ReadDOC_(adr, reg) ((unsigned char)((volatile __u16 )(((unsigned long)adr)+((reg)<<1))))
	#define WriteDOC_(d, adr, reg) do{ (volatile __u16 )(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0)
	#define DOC_IOREMAP_LEN 0x4000
	#else
	#define ReadDOC_(adr, reg) readb((void __iomem *)(adr) + (reg))
	#define WriteDOC_(d, adr, reg) writeb(d, (void __iomem *)(adr) + (reg))
	#define DOC_IOREMAP_LEN 0x2000

	#endif

	#if defined(__i386__) \|\| defined(__x86_64__)
	#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_CLR_ERR 0x80
	#define DOC_MODE_RST_LAT 0x10
	#define DOC_MODE_BDECT 0x08
	#define DOC_MODE_MDWREN 0x04

	#define DOC_ChipID_Doc2k 0x20
	#define DOC_ChipID_Doc2kTSOP 0x21 /* internal number for MTD */
	#define DOC_ChipID_DocMil 0x30
	#define DOC_ChipID_DocMilPlus32 0x40
	#define DOC_ChipID_DocMilPlus16 0x41

	#define CDSN_CTRL_FR_B 0x80
	#define CDSN_CTRL_FR_B0 0x40
	#define CDSN_CTRL_FR_B1 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

	#define DOC_FLASH_CE 0x80
	#define DOC_FLASH_WP 0x40
	#define DOC_FLASH_BANK 0x02

	/* 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 1
	#define MAX_CHIPS_MIL 1

	#define MAX_FLOORS_MPLUS 2
	#define MAX_CHIPS_MPLUS 1

	#define ADDR_COLUMN 1
	#define ADDR_PAGE 2
	#define ADDR_COLUMN_PAGE 3

	struct DiskOnChip {
	unsigned long physadr;
	void __iomem *virtadr;
	unsigned long totlen;
	unsigned 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;
	char interleave; /* Internal interleaving - Millennium Plus style */
	unsigned long erasesize;

	int curfloor;
	int curchip;

	int numchips;
	struct Nand *chips;
	struct mtd_info *nextdoc;
	struct mutex lock;
	};

	int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);

	#endif /* __MTD_DOC2000_H__ */