221 lines
6 KiB
C
221 lines
6 KiB
C
/*
|
|
* 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__)
|
|
static inline u8 ReadDOC_(u32 __iomem *addr, unsigned long reg)
|
|
{
|
|
return __raw_readl(addr + reg);
|
|
}
|
|
static inline void WriteDOC_(u8 data, u32 __iomem *addr, unsigned long reg)
|
|
{
|
|
__raw_writel(data, addr + reg);
|
|
wmb();
|
|
}
|
|
#define DOC_IOREMAP_LEN 0x8000
|
|
#elif defined(__ppc__)
|
|
static inline u8 ReadDOC_(u16 __iomem *addr, unsigned long reg)
|
|
{
|
|
return __raw_readw(addr + reg);
|
|
}
|
|
static inline void WriteDOC_(u8 data, u16 __iomem *addr, unsigned long reg)
|
|
{
|
|
__raw_writew(data, addr + reg);
|
|
wmb();
|
|
}
|
|
#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__ */
|