cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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doc2000.h (5505B)


      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Linux driver for Disk-On-Chip devices
      4 *
      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 Inc
      9 */
     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 0
     18#define DoC_Sig2 1
     19
     20#define DoC_ChipID		0x1000
     21#define DoC_DOCStatus		0x1001
     22#define DoC_DOCControl		0x1002
     23#define DoC_FloorSelect		0x1003
     24#define DoC_CDSNControl		0x1004
     25#define DoC_CDSNDeviceSelect 	0x1005
     26#define DoC_ECCConf 		0x1006
     27#define DoC_2k_ECCStatus	0x1007
     28
     29#define DoC_CDSNSlowIO		0x100d
     30#define DoC_ECCSyndrome0	0x1010
     31#define DoC_ECCSyndrome1	0x1011
     32#define DoC_ECCSyndrome2	0x1012
     33#define DoC_ECCSyndrome3	0x1013
     34#define DoC_ECCSyndrome4	0x1014
     35#define DoC_ECCSyndrome5	0x1015
     36#define DoC_AliasResolution 	0x101b
     37#define DoC_ConfigInput		0x101c
     38#define DoC_ReadPipeInit 	0x101d
     39#define DoC_WritePipeTerm 	0x101e
     40#define DoC_LastDataRead 	0x101f
     41#define DoC_NOP 		0x1020
     42
     43#define DoC_Mil_CDSN_IO 	0x0800
     44#define DoC_2k_CDSN_IO 		0x1800
     45
     46#define DoC_Mplus_NOP			0x1002
     47#define DoC_Mplus_AliasResolution	0x1004
     48#define DoC_Mplus_DOCControl		0x1006
     49#define DoC_Mplus_AccessStatus		0x1008
     50#define DoC_Mplus_DeviceSelect		0x1008
     51#define DoC_Mplus_Configuration		0x100a
     52#define DoC_Mplus_OutputControl		0x100c
     53#define DoC_Mplus_FlashControl		0x1020
     54#define DoC_Mplus_FlashSelect 		0x1022
     55#define DoC_Mplus_FlashCmd		0x1024
     56#define DoC_Mplus_FlashAddress		0x1026
     57#define DoC_Mplus_FlashData0		0x1028
     58#define DoC_Mplus_FlashData1		0x1029
     59#define DoC_Mplus_ReadPipeInit		0x102a
     60#define DoC_Mplus_LastDataRead		0x102c
     61#define DoC_Mplus_LastDataRead1		0x102d
     62#define DoC_Mplus_WritePipeTerm 	0x102e
     63#define DoC_Mplus_ECCSyndrome0		0x1040
     64#define DoC_Mplus_ECCSyndrome1		0x1041
     65#define DoC_Mplus_ECCSyndrome2		0x1042
     66#define DoC_Mplus_ECCSyndrome3		0x1043
     67#define DoC_Mplus_ECCSyndrome4		0x1044
     68#define DoC_Mplus_ECCSyndrome5		0x1045
     69#define DoC_Mplus_ECCConf 		0x1046
     70#define DoC_Mplus_Toggle		0x1046
     71#define DoC_Mplus_DownloadStatus	0x1074
     72#define DoC_Mplus_CtrlConfirm		0x1076
     73#define DoC_Mplus_Power			0x1fff
     74
     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/writeb
     79 */
     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 0x8000
     91#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 0x4000
    102#else
    103#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 0x2000
    106
    107#endif
    108
    109#if defined(__i386__) || defined(__x86_64__)
    110#define USE_MEMCPY
    111#endif
    112
    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 		0
    118#define DOC_MODE_NORMAL 	1
    119#define DOC_MODE_RESERVED1 	2
    120#define DOC_MODE_RESERVED2 	3
    121
    122#define DOC_MODE_CLR_ERR 	0x80
    123#define	DOC_MODE_RST_LAT	0x10
    124#define	DOC_MODE_BDECT		0x08
    125#define DOC_MODE_MDWREN 	0x04
    126
    127#define DOC_ChipID_Doc2k 	0x20
    128#define DOC_ChipID_Doc2kTSOP 	0x21	/* internal number for MTD */
    129#define DOC_ChipID_DocMil 	0x30
    130#define DOC_ChipID_DocMilPlus32	0x40
    131#define DOC_ChipID_DocMilPlus16	0x41
    132
    133#define CDSN_CTRL_FR_B 		0x80
    134#define CDSN_CTRL_FR_B0		0x40
    135#define CDSN_CTRL_FR_B1		0x80
    136
    137#define CDSN_CTRL_ECC_IO 	0x20
    138#define CDSN_CTRL_FLASH_IO 	0x10
    139#define CDSN_CTRL_WP 		0x08
    140#define CDSN_CTRL_ALE 		0x04
    141#define CDSN_CTRL_CLE 		0x02
    142#define CDSN_CTRL_CE 		0x01
    143
    144#define DOC_ECC_RESET 		0
    145#define DOC_ECC_ERROR 		0x80
    146#define DOC_ECC_RW 		0x20
    147#define DOC_ECC__EN 		0x08
    148#define DOC_TOGGLE_BIT 		0x04
    149#define DOC_ECC_RESV 		0x02
    150#define DOC_ECC_IGNORE		0x01
    151
    152#define DOC_FLASH_CE		0x80
    153#define DOC_FLASH_WP		0x40
    154#define DOC_FLASH_BANK		0x02
    155
    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 4
    168#define MAX_CHIPS 4
    169
    170#define MAX_FLOORS_MIL 1
    171#define MAX_CHIPS_MIL 1
    172
    173#define MAX_FLOORS_MPLUS 2
    174#define MAX_CHIPS_MPLUS 1
    175
    176#define ADDR_COLUMN 1
    177#define ADDR_PAGE 2
    178#define ADDR_COLUMN_PAGE 3
    179
    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__ */