drivers/mtd/devices/docg3.h

   1 /*
   2  * Handles the M-Systems DiskOnChip G3 chip
   3  *
   4  * Copyright (C) 2011 Robert Jarzmik
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #ifndef _MTD_DOCG3_H
  23 #define _MTD_DOCG3_H
  24
  25 /*
  26  * Flash memory areas :
  27  *   - 0x0000 .. 0x07ff : IPL
  28  *   - 0x0800 .. 0x0fff : Data area
  29  *   - 0x1000 .. 0x17ff : Registers
  30  *   - 0x1800 .. 0x1fff : Unknown
  31  */
  32 #define DOC_IOSPACE_IPL                 0x0000
  33 #define DOC_IOSPACE_DATA                0x0800
  34 #define DOC_IOSPACE_SIZE                0x2000
  35
  36 /*
  37  * DOC G3 layout and adressing scheme
  38  *   A page address for the block "b", plane "P" and page "p":
  39  *   address = [bbbb bPpp pppp]
  40  */
  41
  42 #define DOC_ADDR_PAGE_MASK              0x3f
  43 #define DOC_ADDR_BLOCK_SHIFT            6
  44 #define DOC_LAYOUT_NBPLANES             2
  45 #define DOC_LAYOUT_PAGES_PER_BLOCK      64
  46 #define DOC_LAYOUT_PAGE_SIZE            512
  47 #define DOC_LAYOUT_OOB_SIZE             16
  48 #define DOC_LAYOUT_WEAR_SIZE            8
  49 #define DOC_LAYOUT_PAGE_OOB_SIZE                                \
  50         (DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_SIZE)
  51 #define DOC_LAYOUT_WEAR_OFFSET          (DOC_LAYOUT_PAGE_OOB_SIZE * 2)
  52 #define DOC_LAYOUT_BLOCK_SIZE                                   \
  53         (DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_PAGE_SIZE)
  54 #define DOC_ECC_BCH_SIZE                7
  55 #define DOC_ECC_BCH_COVERED_BYTES                               \
  56         (DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_PAGEINFO_SZ +    \
  57          DOC_LAYOUT_OOB_HAMMING_SZ + DOC_LAYOUT_OOB_BCH_SZ)
  58
  59 /*
  60  * Blocks distribution
  61  */
  62 #define DOC_LAYOUT_BLOCK_BBT            0
  63 #define DOC_LAYOUT_BLOCK_OTP            0
  64 #define DOC_LAYOUT_BLOCK_FIRST_DATA     6
  65
  66 #define DOC_LAYOUT_PAGE_BBT             4
  67
  68 /*
  69  * Extra page OOB (16 bytes wide) layout
  70  */
  71 #define DOC_LAYOUT_OOB_PAGEINFO_OFS     0
  72 #define DOC_LAYOUT_OOB_HAMMING_OFS      7
  73 #define DOC_LAYOUT_OOB_BCH_OFS          8
  74 #define DOC_LAYOUT_OOB_UNUSED_OFS       15
  75 #define DOC_LAYOUT_OOB_PAGEINFO_SZ      7
  76 #define DOC_LAYOUT_OOB_HAMMING_SZ       1
  77 #define DOC_LAYOUT_OOB_BCH_SZ           7
  78 #define DOC_LAYOUT_OOB_UNUSED_SZ        1
  79
  80
  81 #define DOC_CHIPID_G3                   0x200
  82 #define DOC_ERASE_MARK                  0xaa
  83 /*
  84  * Flash registers
  85  */
  86 #define DOC_CHIPID                      0x1000
  87 #define DOC_TEST                        0x1004
  88 #define DOC_BUSLOCK                     0x1006
  89 #define DOC_ENDIANCONTROL               0x1008
  90 #define DOC_DEVICESELECT                0x100a
  91 #define DOC_ASICMODE                    0x100c
  92 #define DOC_CONFIGURATION               0x100e
  93 #define DOC_INTERRUPTCONTROL            0x1010
  94 #define DOC_READADDRESS                 0x101a
  95 #define DOC_DATAEND                     0x101e
  96 #define DOC_INTERRUPTSTATUS             0x1020
  97
  98 #define DOC_FLASHSEQUENCE               0x1032
  99 #define DOC_FLASHCOMMAND                0x1034
 100 #define DOC_FLASHADDRESS                0x1036
 101 #define DOC_FLASHCONTROL                0x1038
 102 #define DOC_NOP                         0x103e
 103
 104 #define DOC_ECCCONF0                    0x1040
 105 #define DOC_ECCCONF1                    0x1042
 106 #define DOC_ECCPRESET                   0x1044
 107 #define DOC_HAMMINGPARITY               0x1046
 108 #define DOC_BCH_SYNDROM(idx)            (0x1048 + (idx << 1))
 109
 110 #define DOC_PROTECTION                  0x1056
 111 #define DOC_DPS0_ADDRLOW                0x1060
 112 #define DOC_DPS0_ADDRHIGH               0x1062
 113 #define DOC_DPS1_ADDRLOW                0x1064
 114 #define DOC_DPS1_ADDRHIGH               0x1066
 115 #define DOC_DPS0_STATUS                 0x106c
 116 #define DOC_DPS1_STATUS                 0x106e
 117
 118 #define DOC_ASICMODECONFIRM             0x1072
 119 #define DOC_CHIPID_INV                  0x1074
 120
 121 /*
 122  * Flash sequences
 123  * A sequence is preset before one or more commands are input to the chip.
 124  */
 125 #define DOC_SEQ_RESET                   0x00
 126 #define DOC_SEQ_PAGE_SIZE_532           0x03
 127 #define DOC_SEQ_SET_MODE                0x09
 128 #define DOC_SEQ_READ                    0x12
 129 #define DOC_SEQ_SET_PLANE1              0x0e
 130 #define DOC_SEQ_SET_PLANE2              0x10
 131 #define DOC_SEQ_PAGE_SETUP              0x1d
 132
 133 /*
 134  * Flash commands
 135  */
 136 #define DOC_CMD_READ_PLANE1             0x00
 137 #define DOC_CMD_SET_ADDR_READ           0x05
 138 #define DOC_CMD_READ_ALL_PLANES         0x30
 139 #define DOC_CMD_READ_PLANE2             0x50
 140 #define DOC_CMD_READ_FLASH              0xe0
 141 #define DOC_CMD_PAGE_SIZE_532           0x3c
 142
 143 #define DOC_CMD_PROG_BLOCK_ADDR         0x60
 144 #define DOC_CMD_PROG_CYCLE1             0x80
 145 #define DOC_CMD_PROG_CYCLE2             0x10
 146 #define DOC_CMD_ERASECYCLE2             0xd0
 147
 148 #define DOC_CMD_RELIABLE_MODE           0x22
 149 #define DOC_CMD_FAST_MODE               0xa2
 150
 151 #define DOC_CMD_RESET                   0xff
 152
 153 /*
 154  * Flash register : DOC_FLASHCONTROL
 155  */
 156 #define DOC_CTRL_VIOLATION              0x20
 157 #define DOC_CTRL_CE                     0x10
 158 #define DOC_CTRL_UNKNOWN_BITS           0x08
 159 #define DOC_CTRL_PROTECTION_ERROR       0x04
 160 #define DOC_CTRL_SEQUENCE_ERROR         0x02
 161 #define DOC_CTRL_FLASHREADY             0x01
 162
 163 /*
 164  * Flash register : DOC_ASICMODE
 165  */
 166 #define DOC_ASICMODE_RESET              0x00
 167 #define DOC_ASICMODE_NORMAL             0x01
 168 #define DOC_ASICMODE_POWERDOWN          0x02
 169 #define DOC_ASICMODE_MDWREN             0x04
 170 #define DOC_ASICMODE_BDETCT_RESET       0x08
 171 #define DOC_ASICMODE_RSTIN_RESET        0x10
 172 #define DOC_ASICMODE_RAM_WE             0x20
 173
 174 /*
 175  * Flash register : DOC_ECCCONF0
 176  */
 177 #define DOC_ECCCONF0_READ_MODE          0x8000
 178 #define DOC_ECCCONF0_AUTO_ECC_ENABLE    0x4000
 179 #define DOC_ECCCONF0_HAMMING_ENABLE     0x1000
 180 #define DOC_ECCCONF0_BCH_ENABLE         0x0800
 181 #define DOC_ECCCONF0_DATA_BYTES_MASK    0x07ff
 182
 183 /*
 184  * Flash register : DOC_ECCCONF1
 185  */
 186 #define DOC_ECCCONF1_BCH_SYNDROM_ERR    0x80
 187 #define DOC_ECCCONF1_UNKOWN1            0x40
 188 #define DOC_ECCCONF1_UNKOWN2            0x20
 189 #define DOC_ECCCONF1_UNKOWN3            0x10
 190 #define DOC_ECCCONF1_HAMMING_BITS_MASK  0x0f
 191
 192 /*
 193  * Flash register : DOC_PROTECTION
 194  */
 195 #define DOC_PROTECT_FOUNDRY_OTP_LOCK    0x01
 196 #define DOC_PROTECT_CUSTOMER_OTP_LOCK   0x02
 197 #define DOC_PROTECT_LOCK_INPUT          0x04
 198 #define DOC_PROTECT_STICKY_LOCK         0x08
 199 #define DOC_PROTECT_PROTECTION_ENABLED  0x10
 200 #define DOC_PROTECT_IPL_DOWNLOAD_LOCK   0x20
 201 #define DOC_PROTECT_PROTECTION_ERROR    0x80
 202
 203 /*
 204  * Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
 205  */
 206 #define DOC_DPS_OTP_PROTECTED           0x01
 207 #define DOC_DPS_READ_PROTECTED          0x02
 208 #define DOC_DPS_WRITE_PROTECTED         0x04
 209 #define DOC_DPS_HW_LOCK_ENABLED         0x08
 210 #define DOC_DPS_KEY_OK                  0x80
 211
 212 /*
 213  * Flash register : DOC_CONFIGURATION
 214  */
 215 #define DOC_CONF_IF_CFG                 0x80
 216 #define DOC_CONF_MAX_ID_MASK            0x30
 217 #define DOC_CONF_VCCQ_3V                0x01
 218
 219 /*
 220  * Flash register : DOC_READADDRESS
 221  */
 222 #define DOC_READADDR_INC                0x8000
 223 #define DOC_READADDR_ONE_BYTE           0x4000
 224 #define DOC_READADDR_ADDR_MASK          0x1fff
 225
 226 /**
 227  * struct docg3 - DiskOnChip driver private data
 228  * @dev: the device currently under control
 229  * @base: mapped IO space
 230  * @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
 231  * @if_cfg: if true, reads are on 16bits, else reads are on 8bits
 232  * @bbt: bad block table cache
 233  * @debugfs_root: debugfs root node
 234  */
 235 struct docg3 {
 236         struct device *dev;
 237         void __iomem *base;
 238         unsigned int device_id:4;
 239         unsigned int if_cfg:1;
 240         int max_block;
 241         u8 *bbt;
 242         struct dentry *debugfs_root;
 243 };
 244
 245 #define doc_err(fmt, arg...) dev_err(docg3->dev, (fmt), ## arg)
 246 #define doc_info(fmt, arg...) dev_info(docg3->dev, (fmt), ## arg)
 247 #define doc_dbg(fmt, arg...) dev_dbg(docg3->dev, (fmt), ## arg)
 248 #define doc_vdbg(fmt, arg...) dev_vdbg(docg3->dev, (fmt), ## arg)
 249
 250 #define DEBUGFS_RO_ATTR(name, show_fct) \
 251         static int name##_open(struct inode *inode, struct file *file) \
 252         { return single_open(file, show_fct, inode->i_private); }      \
 253         static const struct file_operations name##_fops = { \
 254                 .owner = THIS_MODULE, \
 255                 .open = name##_open, \
 256                 .llseek = seq_lseek, \
 257                 .read = seq_read, \
 258                 .release = single_release \
 259         };
 260 #endif
 261
 262 /*
 263  * Trace events part
 264  */
 265 #undef TRACE_SYSTEM
 266 #define TRACE_SYSTEM docg3
 267
 268 #if !defined(_MTD_DOCG3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
 269 #define _MTD_DOCG3_TRACE
 270
 271 #include <linux/tracepoint.h>
 272
 273 TRACE_EVENT(docg3_io,
 274             TP_PROTO(int op, int width, u16 reg, int val),
 275             TP_ARGS(op, width, reg, val),
 276             TP_STRUCT__entry(
 277                     __field(int, op)
 278                     __field(unsigned char, width)
 279                     __field(u16, reg)
 280                     __field(int, val)),
 281             TP_fast_assign(
 282                     __entry->op = op;
 283                     __entry->width = width;
 284                     __entry->reg = reg;
 285                     __entry->val = val;),
 286             TP_printk("docg3: %s%02d reg=%04x, val=%04x",
 287                       __entry->op ? "write" : "read", __entry->width,
 288                       __entry->reg, __entry->val)
 289         );
 290 #endif
 291
 292 /* This part must be outside protection */
 293 #undef TRACE_INCLUDE_PATH
 294 #undef TRACE_INCLUDE_FILE
 295 #define TRACE_INCLUDE_PATH .
 296 #define TRACE_INCLUDE_FILE docg3
 297 #include <trace/define_trace.h>