include/linux/mtd/doc2000.h

   1 /*
   2  * Linux driver for Disk-On-Chip devices
   3  *
   4  * Copyright (C) 1999 Machine Vision Holdings, Inc.
   5  * Copyright (C) 2001-2003 David Woodhouse <dwmw2@infradead.org>
   6  * Copyright (C) 2002-2003 Greg Ungerer <gerg@snapgear.com>
   7  * Copyright (C) 2002-2003 SnapGear Inc
   8  *
   9  * Released under GPL
  10  */
  11
  12 #ifndef __MTD_DOC2000_H__
  13 #define __MTD_DOC2000_H__
  14
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/mutex.h>
  17
  18 #define DoC_Sig1 0
  19 #define DoC_Sig2 1
  20
  21 #define DoC_ChipID              0x1000
  22 #define DoC_DOCStatus           0x1001
  23 #define DoC_DOCControl          0x1002
  24 #define DoC_FloorSelect         0x1003
  25 #define DoC_CDSNControl         0x1004
  26 #define DoC_CDSNDeviceSelect    0x1005
  27 #define DoC_ECCConf             0x1006
  28 #define DoC_2k_ECCStatus        0x1007
  29
  30 #define DoC_CDSNSlowIO          0x100d
  31 #define DoC_ECCSyndrome0        0x1010
  32 #define DoC_ECCSyndrome1        0x1011
  33 #define DoC_ECCSyndrome2        0x1012
  34 #define DoC_ECCSyndrome3        0x1013
  35 #define DoC_ECCSyndrome4        0x1014
  36 #define DoC_ECCSyndrome5        0x1015
  37 #define DoC_AliasResolution     0x101b
  38 #define DoC_ConfigInput         0x101c
  39 #define DoC_ReadPipeInit        0x101d
  40 #define DoC_WritePipeTerm       0x101e
  41 #define DoC_LastDataRead        0x101f
  42 #define DoC_NOP                 0x1020
  43
  44 #define DoC_Mil_CDSN_IO         0x0800
  45 #define DoC_2k_CDSN_IO          0x1800
  46
  47 #define DoC_Mplus_NOP                   0x1002
  48 #define DoC_Mplus_AliasResolution       0x1004
  49 #define DoC_Mplus_DOCControl            0x1006
  50 #define DoC_Mplus_AccessStatus          0x1008
  51 #define DoC_Mplus_DeviceSelect          0x1008
  52 #define DoC_Mplus_Configuration         0x100a
  53 #define DoC_Mplus_OutputControl         0x100c
  54 #define DoC_Mplus_FlashControl          0x1020
  55 #define DoC_Mplus_FlashSelect           0x1022
  56 #define DoC_Mplus_FlashCmd              0x1024
  57 #define DoC_Mplus_FlashAddress          0x1026
  58 #define DoC_Mplus_FlashData0            0x1028
  59 #define DoC_Mplus_FlashData1            0x1029
  60 #define DoC_Mplus_ReadPipeInit          0x102a
  61 #define DoC_Mplus_LastDataRead          0x102c
  62 #define DoC_Mplus_LastDataRead1         0x102d
  63 #define DoC_Mplus_WritePipeTerm         0x102e
  64 #define DoC_Mplus_ECCSyndrome0          0x1040
  65 #define DoC_Mplus_ECCSyndrome1          0x1041
  66 #define DoC_Mplus_ECCSyndrome2          0x1042
  67 #define DoC_Mplus_ECCSyndrome3          0x1043
  68 #define DoC_Mplus_ECCSyndrome4          0x1044
  69 #define DoC_Mplus_ECCSyndrome5          0x1045
  70 #define DoC_Mplus_ECCConf               0x1046
  71 #define DoC_Mplus_Toggle                0x1046
  72 #define DoC_Mplus_DownloadStatus        0x1074
  73 #define DoC_Mplus_CtrlConfirm           0x1076
  74 #define DoC_Mplus_Power                 0x1fff
  75
  76 /* How to access the device?
  77  * On ARM, it'll be mmap'd directly with 32-bit wide accesses.
  78  * On PPC, it's mmap'd and 16-bit wide.
  79  * Others use readb/writeb
  80  */
  81 #if defined(__arm__)
  82 #define ReadDOC_(adr, reg)      ((unsigned char)(*(volatile __u32 *)(((unsigned long)adr)+((reg)<<2))))
  83 #define WriteDOC_(d, adr, reg)  do{ *(volatile __u32 *)(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0)
  84 #define DOC_IOREMAP_LEN 0x8000
  85 #elif defined(__ppc__)
  86 #define ReadDOC_(adr, reg)      ((unsigned char)(*(volatile __u16 *)(((unsigned long)adr)+((reg)<<1))))
  87 #define WriteDOC_(d, adr, reg)  do{ *(volatile __u16 *)(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0)
  88 #define DOC_IOREMAP_LEN 0x4000
  89 #else
  90 #define ReadDOC_(adr, reg)      readb((void __iomem *)(adr) + (reg))
  91 #define WriteDOC_(d, adr, reg)  writeb(d, (void __iomem *)(adr) + (reg))
  92 #define DOC_IOREMAP_LEN 0x2000
  93
  94 #endif
  95
  96 #if defined(__i386__) || defined(__x86_64__)
  97 #define USE_MEMCPY
  98 #endif
  99
 100 /* These are provided to directly use the DoC_xxx defines */
 101 #define ReadDOC(adr, reg)      ReadDOC_(adr,DoC_##reg)
 102 #define WriteDOC(d, adr, reg)  WriteDOC_(d,adr,DoC_##reg)
 103
 104 #define DOC_MODE_RESET          0
 105 #define DOC_MODE_NORMAL         1
 106 #define DOC_MODE_RESERVED1      2
 107 #define DOC_MODE_RESERVED2      3
 108
 109 #define DOC_MODE_CLR_ERR        0x80
 110 #define DOC_MODE_RST_LAT        0x10
 111 #define DOC_MODE_BDECT          0x08
 112 #define DOC_MODE_MDWREN         0x04
 113
 114 #define DOC_ChipID_Doc2k        0x20
 115 #define DOC_ChipID_Doc2kTSOP    0x21    /* internal number for MTD */
 116 #define DOC_ChipID_DocMil       0x30
 117 #define DOC_ChipID_DocMilPlus32 0x40
 118 #define DOC_ChipID_DocMilPlus16 0x41
 119
 120 #define CDSN_CTRL_FR_B          0x80
 121 #define CDSN_CTRL_FR_B0         0x40
 122 #define CDSN_CTRL_FR_B1         0x80
 123
 124 #define CDSN_CTRL_ECC_IO        0x20
 125 #define CDSN_CTRL_FLASH_IO      0x10
 126 #define CDSN_CTRL_WP            0x08
 127 #define CDSN_CTRL_ALE           0x04
 128 #define CDSN_CTRL_CLE           0x02
 129 #define CDSN_CTRL_CE            0x01
 130
 131 #define DOC_ECC_RESET           0
 132 #define DOC_ECC_ERROR           0x80
 133 #define DOC_ECC_RW              0x20
 134 #define DOC_ECC__EN             0x08
 135 #define DOC_TOGGLE_BIT          0x04
 136 #define DOC_ECC_RESV            0x02
 137 #define DOC_ECC_IGNORE          0x01
 138
 139 #define DOC_FLASH_CE            0x80
 140 #define DOC_FLASH_WP            0x40
 141 #define DOC_FLASH_BANK          0x02
 142
 143 /* We have to also set the reserved bit 1 for enable */
 144 #define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV)
 145 #define DOC_ECC_DIS (DOC_ECC_RESV)
 146
 147 struct Nand {
 148         char floor, chip;
 149         unsigned long curadr;
 150         unsigned char curmode;
 151         /* Also some erase/write/pipeline info when we get that far */
 152 };
 153
 154 #define MAX_FLOORS 4
 155 #define MAX_CHIPS 4
 156
 157 #define MAX_FLOORS_MIL 1
 158 #define MAX_CHIPS_MIL 1
 159
 160 #define MAX_FLOORS_MPLUS 2
 161 #define MAX_CHIPS_MPLUS 1
 162
 163 #define ADDR_COLUMN 1
 164 #define ADDR_PAGE 2
 165 #define ADDR_COLUMN_PAGE 3
 166
 167 struct DiskOnChip {
 168         unsigned long physadr;
 169         void __iomem *virtadr;
 170         unsigned long totlen;
 171         unsigned char ChipID; /* Type of DiskOnChip */
 172         int ioreg;
 173
 174         unsigned long mfr; /* Flash IDs - only one type of flash per device */
 175         unsigned long id;
 176         int chipshift;
 177         char page256;
 178         char pageadrlen;
 179         char interleave; /* Internal interleaving - Millennium Plus style */
 180         unsigned long erasesize;
 181
 182         int curfloor;
 183         int curchip;
 184
 185         int numchips;
 186         struct Nand *chips;
 187         struct mtd_info *nextdoc;
 188         struct mutex lock;
 189 };
 190
 191 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);
 192
 193 #endif /* __MTD_DOC2000_H__ */