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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Linux driver for Disk-On-Chip devices4 *5 * Copyright © 1999 Machine Vision Holdings, Inc.6 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>7 * Copyright © 2002-2003 Greg Ungerer <gerg@snapgear.com>8 * Copyright © 2002-2003 SnapGear Inc9 */10 11#ifndef __MTD_DOC2000_H__12#define __MTD_DOC2000_H__13 14#include <linux/mtd/mtd.h>15#include <linux/mutex.h>16 17#define DoC_Sig1 018#define DoC_Sig2 119 20#define DoC_ChipID 0x100021#define DoC_DOCStatus 0x100122#define DoC_DOCControl 0x100223#define DoC_FloorSelect 0x100324#define DoC_CDSNControl 0x100425#define DoC_CDSNDeviceSelect 0x100526#define DoC_ECCConf 0x100627#define DoC_2k_ECCStatus 0x100728 29#define DoC_CDSNSlowIO 0x100d30#define DoC_ECCSyndrome0 0x101031#define DoC_ECCSyndrome1 0x101132#define DoC_ECCSyndrome2 0x101233#define DoC_ECCSyndrome3 0x101334#define DoC_ECCSyndrome4 0x101435#define DoC_ECCSyndrome5 0x101536#define DoC_AliasResolution 0x101b37#define DoC_ConfigInput 0x101c38#define DoC_ReadPipeInit 0x101d39#define DoC_WritePipeTerm 0x101e40#define DoC_LastDataRead 0x101f41#define DoC_NOP 0x102042 43#define DoC_Mil_CDSN_IO 0x080044#define DoC_2k_CDSN_IO 0x180045 46#define DoC_Mplus_NOP 0x100247#define DoC_Mplus_AliasResolution 0x100448#define DoC_Mplus_DOCControl 0x100649#define DoC_Mplus_AccessStatus 0x100850#define DoC_Mplus_DeviceSelect 0x100851#define DoC_Mplus_Configuration 0x100a52#define DoC_Mplus_OutputControl 0x100c53#define DoC_Mplus_FlashControl 0x102054#define DoC_Mplus_FlashSelect 0x102255#define DoC_Mplus_FlashCmd 0x102456#define DoC_Mplus_FlashAddress 0x102657#define DoC_Mplus_FlashData0 0x102858#define DoC_Mplus_FlashData1 0x102959#define DoC_Mplus_ReadPipeInit 0x102a60#define DoC_Mplus_LastDataRead 0x102c61#define DoC_Mplus_LastDataRead1 0x102d62#define DoC_Mplus_WritePipeTerm 0x102e63#define DoC_Mplus_ECCSyndrome0 0x104064#define DoC_Mplus_ECCSyndrome1 0x104165#define DoC_Mplus_ECCSyndrome2 0x104266#define DoC_Mplus_ECCSyndrome3 0x104367#define DoC_Mplus_ECCSyndrome4 0x104468#define DoC_Mplus_ECCSyndrome5 0x104569#define DoC_Mplus_ECCConf 0x104670#define DoC_Mplus_Toggle 0x104671#define DoC_Mplus_DownloadStatus 0x107472#define DoC_Mplus_CtrlConfirm 0x107673#define DoC_Mplus_Power 0x1fff74 75/* How to access the device?76 * On ARM, it'll be mmap'd directly with 32-bit wide accesses.77 * On PPC, it's mmap'd and 16-bit wide.78 * Others use readb/writeb79 */80#if defined(__arm__)81static inline u8 ReadDOC_(u32 __iomem *addr, unsigned long reg)82{83 return __raw_readl(addr + reg);84}85static inline void WriteDOC_(u8 data, u32 __iomem *addr, unsigned long reg)86{87 __raw_writel(data, addr + reg);88 wmb();89}90#define DOC_IOREMAP_LEN 0x800091#elif defined(__ppc__)92static inline u8 ReadDOC_(u16 __iomem *addr, unsigned long reg)93{94 return __raw_readw(addr + reg);95}96static inline void WriteDOC_(u8 data, u16 __iomem *addr, unsigned long reg)97{98 __raw_writew(data, addr + reg);99 wmb();100}101#define DOC_IOREMAP_LEN 0x4000102#else103#define ReadDOC_(adr, reg) readb((void __iomem *)(adr) + (reg))104#define WriteDOC_(d, adr, reg) writeb(d, (void __iomem *)(adr) + (reg))105#define DOC_IOREMAP_LEN 0x2000106 107#endif108 109#if defined(__i386__) || defined(__x86_64__)110#define USE_MEMCPY111#endif112 113/* These are provided to directly use the DoC_xxx defines */114#define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg)115#define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg)116 117#define DOC_MODE_RESET 0118#define DOC_MODE_NORMAL 1119#define DOC_MODE_RESERVED1 2120#define DOC_MODE_RESERVED2 3121 122#define DOC_MODE_CLR_ERR 0x80123#define DOC_MODE_RST_LAT 0x10124#define DOC_MODE_BDECT 0x08125#define DOC_MODE_MDWREN 0x04126 127#define DOC_ChipID_Doc2k 0x20128#define DOC_ChipID_Doc2kTSOP 0x21 /* internal number for MTD */129#define DOC_ChipID_DocMil 0x30130#define DOC_ChipID_DocMilPlus32 0x40131#define DOC_ChipID_DocMilPlus16 0x41132 133#define CDSN_CTRL_FR_B 0x80134#define CDSN_CTRL_FR_B0 0x40135#define CDSN_CTRL_FR_B1 0x80136 137#define CDSN_CTRL_ECC_IO 0x20138#define CDSN_CTRL_FLASH_IO 0x10139#define CDSN_CTRL_WP 0x08140#define CDSN_CTRL_ALE 0x04141#define CDSN_CTRL_CLE 0x02142#define CDSN_CTRL_CE 0x01143 144#define DOC_ECC_RESET 0145#define DOC_ECC_ERROR 0x80146#define DOC_ECC_RW 0x20147#define DOC_ECC__EN 0x08148#define DOC_TOGGLE_BIT 0x04149#define DOC_ECC_RESV 0x02150#define DOC_ECC_IGNORE 0x01151 152#define DOC_FLASH_CE 0x80153#define DOC_FLASH_WP 0x40154#define DOC_FLASH_BANK 0x02155 156/* We have to also set the reserved bit 1 for enable */157#define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV)158#define DOC_ECC_DIS (DOC_ECC_RESV)159 160struct Nand {161 char floor, chip;162 unsigned long curadr;163 unsigned char curmode;164 /* Also some erase/write/pipeline info when we get that far */165};166 167#define MAX_FLOORS 4168#define MAX_CHIPS 4169 170#define MAX_FLOORS_MIL 1171#define MAX_CHIPS_MIL 1172 173#define MAX_FLOORS_MPLUS 2174#define MAX_CHIPS_MPLUS 1175 176#define ADDR_COLUMN 1177#define ADDR_PAGE 2178#define ADDR_COLUMN_PAGE 3179 180struct DiskOnChip {181 unsigned long physadr;182 void __iomem *virtadr;183 unsigned long totlen;184 unsigned char ChipID; /* Type of DiskOnChip */185 int ioreg;186 187 unsigned long mfr; /* Flash IDs - only one type of flash per device */188 unsigned long id;189 int chipshift;190 char page256;191 char pageadrlen;192 char interleave; /* Internal interleaving - Millennium Plus style */193 unsigned long erasesize;194 195 int curfloor;196 int curchip;197 198 int numchips;199 struct Nand *chips;200 struct mtd_info *nextdoc;201 struct mutex lock;202};203 204int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);205 206#endif /* __MTD_DOC2000_H__ */207