mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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196 lines
5.4 KiB
C
196 lines
5.4 KiB
C
/*
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* Linux driver for Disk-On-Chip devices
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*
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* Copyright (C) 1999 Machine Vision Holdings, Inc.
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* Copyright (C) 2001-2003 David Woodhouse <dwmw2@infradead.org>
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* Copyright (C) 2002-2003 Greg Ungerer <gerg@snapgear.com>
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* Copyright (C) 2002-2003 SnapGear Inc
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*
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* $Id: doc2000.h,v 1.25 2005/11/07 11:14:54 gleixner Exp $
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*
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* Released under GPL
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*/
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#ifndef __MTD_DOC2000_H__
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#define __MTD_DOC2000_H__
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#include <linux/mtd/mtd.h>
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#include <asm/semaphore.h>
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#define DoC_Sig1 0
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#define DoC_Sig2 1
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#define DoC_ChipID 0x1000
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#define DoC_DOCStatus 0x1001
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#define DoC_DOCControl 0x1002
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#define DoC_FloorSelect 0x1003
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#define DoC_CDSNControl 0x1004
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#define DoC_CDSNDeviceSelect 0x1005
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#define DoC_ECCConf 0x1006
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#define DoC_2k_ECCStatus 0x1007
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#define DoC_CDSNSlowIO 0x100d
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#define DoC_ECCSyndrome0 0x1010
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#define DoC_ECCSyndrome1 0x1011
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#define DoC_ECCSyndrome2 0x1012
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#define DoC_ECCSyndrome3 0x1013
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#define DoC_ECCSyndrome4 0x1014
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#define DoC_ECCSyndrome5 0x1015
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#define DoC_AliasResolution 0x101b
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#define DoC_ConfigInput 0x101c
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#define DoC_ReadPipeInit 0x101d
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#define DoC_WritePipeTerm 0x101e
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#define DoC_LastDataRead 0x101f
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#define DoC_NOP 0x1020
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#define DoC_Mil_CDSN_IO 0x0800
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#define DoC_2k_CDSN_IO 0x1800
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#define DoC_Mplus_NOP 0x1002
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#define DoC_Mplus_AliasResolution 0x1004
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#define DoC_Mplus_DOCControl 0x1006
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#define DoC_Mplus_AccessStatus 0x1008
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#define DoC_Mplus_DeviceSelect 0x1008
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#define DoC_Mplus_Configuration 0x100a
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#define DoC_Mplus_OutputControl 0x100c
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#define DoC_Mplus_FlashControl 0x1020
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#define DoC_Mplus_FlashSelect 0x1022
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#define DoC_Mplus_FlashCmd 0x1024
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#define DoC_Mplus_FlashAddress 0x1026
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#define DoC_Mplus_FlashData0 0x1028
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#define DoC_Mplus_FlashData1 0x1029
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#define DoC_Mplus_ReadPipeInit 0x102a
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#define DoC_Mplus_LastDataRead 0x102c
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#define DoC_Mplus_LastDataRead1 0x102d
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#define DoC_Mplus_WritePipeTerm 0x102e
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#define DoC_Mplus_ECCSyndrome0 0x1040
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#define DoC_Mplus_ECCSyndrome1 0x1041
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#define DoC_Mplus_ECCSyndrome2 0x1042
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#define DoC_Mplus_ECCSyndrome3 0x1043
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#define DoC_Mplus_ECCSyndrome4 0x1044
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#define DoC_Mplus_ECCSyndrome5 0x1045
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#define DoC_Mplus_ECCConf 0x1046
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#define DoC_Mplus_Toggle 0x1046
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#define DoC_Mplus_DownloadStatus 0x1074
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#define DoC_Mplus_CtrlConfirm 0x1076
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#define DoC_Mplus_Power 0x1fff
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/* How to access the device?
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* On ARM, it'll be mmap'd directly with 32-bit wide accesses.
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* On PPC, it's mmap'd and 16-bit wide.
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* Others use readb/writeb
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*/
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#if defined(__arm__)
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#define ReadDOC_(adr, reg) ((unsigned char)(*(volatile __u32 *)(((unsigned long)adr)+((reg)<<2))))
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#define WriteDOC_(d, adr, reg) do{ *(volatile __u32 *)(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0)
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#define DOC_IOREMAP_LEN 0x8000
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#elif defined(__ppc__)
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#define ReadDOC_(adr, reg) ((unsigned char)(*(volatile __u16 *)(((unsigned long)adr)+((reg)<<1))))
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#define WriteDOC_(d, adr, reg) do{ *(volatile __u16 *)(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0)
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#define DOC_IOREMAP_LEN 0x4000
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#else
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#define ReadDOC_(adr, reg) readb((void __iomem *)(adr) + (reg))
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#define WriteDOC_(d, adr, reg) writeb(d, (void __iomem *)(adr) + (reg))
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#define DOC_IOREMAP_LEN 0x2000
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#endif
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#if defined(__i386__) || defined(__x86_64__)
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#define USE_MEMCPY
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#endif
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/* These are provided to directly use the DoC_xxx defines */
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#define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg)
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#define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg)
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#define DOC_MODE_RESET 0
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#define DOC_MODE_NORMAL 1
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#define DOC_MODE_RESERVED1 2
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#define DOC_MODE_RESERVED2 3
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#define DOC_MODE_CLR_ERR 0x80
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#define DOC_MODE_RST_LAT 0x10
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#define DOC_MODE_BDECT 0x08
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#define DOC_MODE_MDWREN 0x04
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#define DOC_ChipID_Doc2k 0x20
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#define DOC_ChipID_Doc2kTSOP 0x21 /* internal number for MTD */
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#define DOC_ChipID_DocMil 0x30
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#define DOC_ChipID_DocMilPlus32 0x40
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#define DOC_ChipID_DocMilPlus16 0x41
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#define CDSN_CTRL_FR_B 0x80
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#define CDSN_CTRL_FR_B0 0x40
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#define CDSN_CTRL_FR_B1 0x80
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#define CDSN_CTRL_ECC_IO 0x20
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#define CDSN_CTRL_FLASH_IO 0x10
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#define CDSN_CTRL_WP 0x08
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#define CDSN_CTRL_ALE 0x04
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#define CDSN_CTRL_CLE 0x02
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#define CDSN_CTRL_CE 0x01
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#define DOC_ECC_RESET 0
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#define DOC_ECC_ERROR 0x80
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#define DOC_ECC_RW 0x20
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#define DOC_ECC__EN 0x08
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#define DOC_TOGGLE_BIT 0x04
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#define DOC_ECC_RESV 0x02
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#define DOC_ECC_IGNORE 0x01
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#define DOC_FLASH_CE 0x80
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#define DOC_FLASH_WP 0x40
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#define DOC_FLASH_BANK 0x02
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/* We have to also set the reserved bit 1 for enable */
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#define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV)
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#define DOC_ECC_DIS (DOC_ECC_RESV)
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struct Nand {
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char floor, chip;
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unsigned long curadr;
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unsigned char curmode;
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/* Also some erase/write/pipeline info when we get that far */
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};
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#define MAX_FLOORS 4
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#define MAX_CHIPS 4
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#define MAX_FLOORS_MIL 1
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#define MAX_CHIPS_MIL 1
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#define MAX_FLOORS_MPLUS 2
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#define MAX_CHIPS_MPLUS 1
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#define ADDR_COLUMN 1
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#define ADDR_PAGE 2
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#define ADDR_COLUMN_PAGE 3
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struct DiskOnChip {
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unsigned long physadr;
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void __iomem *virtadr;
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unsigned long totlen;
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unsigned char ChipID; /* Type of DiskOnChip */
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int ioreg;
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unsigned long mfr; /* Flash IDs - only one type of flash per device */
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unsigned long id;
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int chipshift;
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char page256;
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char pageadrlen;
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char interleave; /* Internal interleaving - Millennium Plus style */
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unsigned long erasesize;
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int curfloor;
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int curchip;
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int numchips;
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struct Nand *chips;
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struct mtd_info *nextdoc;
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struct semaphore lock;
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};
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int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);
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#endif /* __MTD_DOC2000_H__ */
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