include/linux/mtd/doc2000.h

   1
   2 /* Linux driver for Disk-On-Chip 2000       */
   3 /* (c) 1999 Machine Vision Holdings, Inc.   */
   4 /* Author: David Woodhouse <dwmw2@mvhi.com> */
   5 /* $Id: doc2000.h,v 1.15 2001/09/19 00:22:15 dwmw2 Exp $ */
   6
   7 #ifndef __MTD_DOC2000_H__
   8 #define __MTD_DOC2000_H__
   9
  10 struct DiskOnChip;
  11
  12 #include <linux/mtd/nftl.h>
  13
  14 #define DoC_Sig1 0
  15 #define DoC_Sig2 1
  16
  17 #define DoC_ChipID              0x1000
  18 #define DoC_DOCStatus           0x1001
  19 #define DoC_DOCControl          0x1002
  20 #define DoC_FloorSelect         0x1003
  21 #define DoC_CDSNControl         0x1004
  22 #define DoC_CDSNDeviceSelect    0x1005
  23 #define DoC_ECCConf             0x1006
  24 #define DoC_2k_ECCStatus        0x1007
  25
  26 #define DoC_CDSNSlowIO          0x100d
  27 #define DoC_ECCSyndrome0        0x1010
  28 #define DoC_ECCSyndrome1        0x1011
  29 #define DoC_ECCSyndrome2        0x1012
  30 #define DoC_ECCSyndrome3        0x1013
  31 #define DoC_ECCSyndrome4        0x1014
  32 #define DoC_ECCSyndrome5        0x1015
  33 #define DoC_AliasResolution     0x101b
  34 #define DoC_ConfigInput         0x101c
  35 #define DoC_ReadPipeInit        0x101d
  36 #define DoC_WritePipeTerm       0x101e
  37 #define DoC_LastDataRead        0x101f
  38 #define DoC_NOP                 0x1020
  39
  40 #define DoC_Mil_CDSN_IO         0x0800
  41 #define DoC_2k_CDSN_IO          0x1800
  42
  43 #define ReadDOC_(adr, reg)      ((volatile unsigned char)(*(volatile __u8 *)(((unsigned long)adr)+((reg)))))
  44 #define WriteDOC_(d, adr, reg)  do{ *(volatile __u8 *)(((unsigned long)adr)+((reg))) = (__u8)d; eieio();} while(0)
  45
  46 #define DOC_IOREMAP_LEN         0x4000
  47
  48 /* These are provided to directly use the DoC_xxx defines */
  49 #define ReadDOC(adr, reg)      ReadDOC_(adr,DoC_##reg)
  50 #define WriteDOC(d, adr, reg)  WriteDOC_(d,adr,DoC_##reg)
  51
  52 #define DOC_MODE_RESET          0
  53 #define DOC_MODE_NORMAL         1
  54 #define DOC_MODE_RESERVED1      2
  55 #define DOC_MODE_RESERVED2      3
  56
  57 #define DOC_MODE_MDWREN         4
  58 #define DOC_MODE_CLR_ERR        0x80
  59
  60 #define DOC_ChipID_UNKNOWN      0x00
  61 #define DOC_ChipID_Doc2k        0x20
  62 #define DOC_ChipID_DocMil       0x30
  63
  64 #define CDSN_CTRL_FR_B          0x80
  65 #define CDSN_CTRL_ECC_IO        0x20
  66 #define CDSN_CTRL_FLASH_IO      0x10
  67 #define CDSN_CTRL_WP            0x08
  68 #define CDSN_CTRL_ALE           0x04
  69 #define CDSN_CTRL_CLE           0x02
  70 #define CDSN_CTRL_CE            0x01
  71
  72 #define DOC_ECC_RESET           0
  73 #define DOC_ECC_ERROR           0x80
  74 #define DOC_ECC_RW              0x20
  75 #define DOC_ECC__EN             0x08
  76 #define DOC_TOGGLE_BIT          0x04
  77 #define DOC_ECC_RESV            0x02
  78 #define DOC_ECC_IGNORE          0x01
  79
  80 /* We have to also set the reserved bit 1 for enable */
  81 #define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV)
  82 #define DOC_ECC_DIS (DOC_ECC_RESV)
  83
  84 #define MAX_FLOORS 4
  85 #define MAX_CHIPS 4
  86
  87 #define MAX_FLOORS_MIL 4
  88 #define MAX_CHIPS_MIL 1
  89
  90 #define ADDR_COLUMN 1
  91 #define ADDR_PAGE 2
  92 #define ADDR_COLUMN_PAGE 3
  93
  94 struct Nand {
  95         char floor, chip;
  96         unsigned long curadr;
  97         unsigned char curmode;
  98         /* Also some erase/write/pipeline info when we get that far */
  99 };
 100
 101 struct DiskOnChip {
 102         unsigned long physadr;
 103         unsigned long virtadr;
 104         unsigned long totlen;
 105         char* name;
 106         char ChipID; /* Type of DiskOnChip */
 107         int ioreg;
 108
 109         char* chips_name;
 110         unsigned long mfr; /* Flash IDs - only one type of flash per device */
 111         unsigned long id;
 112         int chipshift;
 113         char page256;
 114         char pageadrlen;
 115         unsigned long erasesize;
 116
 117         int curfloor;
 118         int curchip;
 119
 120         int numchips;
 121         struct Nand *chips;
 122
 123         int nftl_found;
 124         struct NFTLrecord nftl;
 125 };
 126
 127 #define SECTORSIZE 512
 128
 129 /* Return codes from doc_write(), doc_read(), and doc_erase().
 130  */
 131 #define DOC_OK          0
 132 #define DOC_EIO         1
 133 #define DOC_EINVAL      2
 134 #define DOC_EECC        3
 135 #define DOC_ETIMEOUT    4
 136
 137 /*
 138  * Function Prototypes
 139  */
 140 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);
 141
 142 int doc_rw(struct DiskOnChip* this, int cmd, loff_t from, size_t len,
 143            size_t *retlen, u_char *buf);
 144 int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len,
 145                  size_t *retlen, u_char *buf, u_char *eccbuf);
 146 int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len,
 147                   size_t *retlen, const u_char *buf, u_char *eccbuf);
 148 int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len,
 149                  size_t *retlen, u_char *buf);
 150 int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len,
 151                   size_t *retlen, const u_char *buf);
 152 int doc_erase (struct DiskOnChip* this, loff_t ofs, size_t len);
 153
 154 void doc_probe(unsigned long physadr);
 155
 156 void doc_print(struct DiskOnChip*);
 157
 158 /*
 159  * Standard NAND flash commands
 160  */
 161 #define NAND_CMD_READ0          0
 162 #define NAND_CMD_READ1          1
 163 #define NAND_CMD_PAGEPROG       0x10
 164 #define NAND_CMD_READOOB        0x50
 165 #define NAND_CMD_ERASE1         0x60
 166 #define NAND_CMD_STATUS         0x70
 167 #define NAND_CMD_SEQIN          0x80
 168 #define NAND_CMD_READID         0x90
 169 #define NAND_CMD_ERASE2         0xd0
 170 #define NAND_CMD_RESET          0xff
 171
 172 /*
 173  * NAND Flash Manufacturer ID Codes
 174  */
 175 #define NAND_MFR_TOSHIBA        0x98
 176 #define NAND_MFR_SAMSUNG        0xec
 177
 178 /*
 179  * NAND Flash Device ID Structure
 180  *
 181  * Structure overview:
 182  *
 183  *  name - Complete name of device
 184  *
 185  *  manufacture_id - manufacturer ID code of device.
 186  *
 187  *  model_id - model ID code of device.
 188  *
 189  *  chipshift - total number of address bits for the device which
 190  *              is used to calculate address offsets and the total
 191  *              number of bytes the device is capable of.
 192  *
 193  *  page256 - denotes if flash device has 256 byte pages or not.
 194  *
 195  *  pageadrlen - number of bytes minus one needed to hold the
 196  *               complete address into the flash array. Keep in
 197  *               mind that when a read or write is done to a
 198  *               specific address, the address is input serially
 199  *               8 bits at a time. This structure member is used
 200  *               by the read/write routines as a loop index for
 201  *               shifting the address out 8 bits at a time.
 202  *
 203  *  erasesize - size of an erase block in the flash device.
 204  */
 205 struct nand_flash_dev {
 206         char * name;
 207         int manufacture_id;
 208         int model_id;
 209         int chipshift;
 210         char page256;
 211         char pageadrlen;
 212         unsigned long erasesize;
 213         int bus16;
 214 };
 215
 216 #endif /* __MTD_DOC2000_H__ */