include/linux/mmc/mmc.h

   1 /*
   2  * Header for MultiMediaCard (MMC)
   3  *
   4  * Copyright 2002 Hewlett-Packard Company
   5  *
   6  * Use consistent with the GNU GPL is permitted,
   7  * provided that this copyright notice is
   8  * preserved in its entirety in all copies and derived works.
   9  *
  10  * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
  11  * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
  12  * FITNESS FOR ANY PARTICULAR PURPOSE.
  13  *
  14  * Many thanks to Alessandro Rubini and Jonathan Corbet!
  15  *
  16  * Based strongly on code by:
  17  *
  18  * Author: Yong-iL Joh <tolkien@mizi.com>
  19  * Date  : $Date: 2002/06/18 12:37:30 $
  20  *
  21  * Author:  Andrew Christian
  22  *          15 May 2002
  23  */
  24
  25 #ifndef MMC_MMC_H
  26 #define MMC_MMC_H
  27
  28 /* Standard MMC commands (4.1)           type  argument     response */
  29    /* class 1 */
  30 #define MMC_GO_IDLE_STATE         0   /* bc                          */
  31 #define MMC_SEND_OP_COND          1   /* bcr  [31:0] OCR         R3  */
  32 #define MMC_ALL_SEND_CID          2   /* bcr                     R2  */
  33 #define MMC_SET_RELATIVE_ADDR     3   /* ac   [31:16] RCA        R1  */
  34 #define MMC_SET_DSR               4   /* bc   [31:16] RCA            */
  35 #define MMC_SWITCH                6   /* ac   [31:0] See below   R1b */
  36 #define MMC_SELECT_CARD           7   /* ac   [31:16] RCA        R1  */
  37 #define MMC_SEND_EXT_CSD          8   /* adtc                    R1  */
  38 #define MMC_SEND_CSD              9   /* ac   [31:16] RCA        R2  */
  39 #define MMC_SEND_CID             10   /* ac   [31:16] RCA        R2  */
  40 #define MMC_READ_DAT_UNTIL_STOP  11   /* adtc [31:0] dadr        R1  */
  41 #define MMC_STOP_TRANSMISSION    12   /* ac                      R1b */
  42 #define MMC_SEND_STATUS          13   /* ac   [31:16] RCA        R1  */
  43 #define MMC_GO_INACTIVE_STATE    15   /* ac   [31:16] RCA            */
  44
  45   /* class 2 */
  46 #define MMC_SET_BLOCKLEN         16   /* ac   [31:0] block len   R1  */
  47 #define MMC_READ_SINGLE_BLOCK    17   /* adtc [31:0] data addr   R1  */
  48 #define MMC_READ_MULTIPLE_BLOCK  18   /* adtc [31:0] data addr   R1  */
  49
  50   /* class 3 */
  51 #define MMC_WRITE_DAT_UNTIL_STOP 20   /* adtc [31:0] data addr   R1  */
  52
  53   /* class 4 */
  54 #define MMC_SET_BLOCK_COUNT      23   /* adtc [31:0] data addr   R1  */
  55 #define MMC_WRITE_BLOCK          24   /* adtc [31:0] data addr   R1  */
  56 #define MMC_WRITE_MULTIPLE_BLOCK 25   /* adtc                    R1  */
  57 #define MMC_PROGRAM_CID          26   /* adtc                    R1  */
  58 #define MMC_PROGRAM_CSD          27   /* adtc                    R1  */
  59
  60   /* class 6 */
  61 #define MMC_SET_WRITE_PROT       28   /* ac   [31:0] data addr   R1b */
  62 #define MMC_CLR_WRITE_PROT       29   /* ac   [31:0] data addr   R1b */
  63 #define MMC_SEND_WRITE_PROT      30   /* adtc [31:0] wpdata addr R1  */
  64
  65   /* class 5 */
  66 #define MMC_ERASE_GROUP_START    35   /* ac   [31:0] data addr   R1  */
  67 #define MMC_ERASE_GROUP_END      36   /* ac   [31:0] data addr   R1  */
  68 #define MMC_ERASE                38   /* ac                      R1b */
  69
  70   /* class 9 */
  71 #define MMC_FAST_IO              39   /* ac   <Complex>          R4  */
  72 #define MMC_GO_IRQ_STATE         40   /* bcr                     R5  */
  73
  74   /* class 7 */
  75 #define MMC_LOCK_UNLOCK          42   /* adtc                    R1b */
  76
  77   /* class 8 */
  78 #define MMC_APP_CMD              55   /* ac   [31:16] RCA        R1  */
  79 #define MMC_GEN_CMD              56   /* adtc [0] RD/WR          R1  */
  80
  81 /*
  82  * MMC_SWITCH argument format:
  83  *
  84  *      [31:26] Always 0
  85  *      [25:24] Access Mode
  86  *      [23:16] Location of target Byte in EXT_CSD
  87  *      [15:08] Value Byte
  88  *      [07:03] Always 0
  89  *      [02:00] Command Set
  90  */
  91
  92 /*
  93   MMC status in R1
  94   Type
  95         e : error bit
  96         s : status bit
  97         r : detected and set for the actual command response
  98         x : detected and set during command execution. the host must poll
  99             the card by sending status command in order to read these bits.
 100   Clear condition
 101         a : according to the card state
 102         b : always related to the previous command. Reception of
 103             a valid command will clear it (with a delay of one command)
 104         c : clear by read
 105  */
 106
 107 #define R1_OUT_OF_RANGE         (1 << 31)       /* er, c */
 108 #define R1_ADDRESS_ERROR        (1 << 30)       /* erx, c */
 109 #define R1_BLOCK_LEN_ERROR      (1 << 29)       /* er, c */
 110 #define R1_ERASE_SEQ_ERROR      (1 << 28)       /* er, c */
 111 #define R1_ERASE_PARAM          (1 << 27)       /* ex, c */
 112 #define R1_WP_VIOLATION         (1 << 26)       /* erx, c */
 113 #define R1_CARD_IS_LOCKED       (1 << 25)       /* sx, a */
 114 #define R1_LOCK_UNLOCK_FAILED   (1 << 24)       /* erx, c */
 115 #define R1_COM_CRC_ERROR        (1 << 23)       /* er, b */
 116 #define R1_ILLEGAL_COMMAND      (1 << 22)       /* er, b */
 117 #define R1_CARD_ECC_FAILED      (1 << 21)       /* ex, c */
 118 #define R1_CC_ERROR             (1 << 20)       /* erx, c */
 119 #define R1_ERROR                (1 << 19)       /* erx, c */
 120 #define R1_UNDERRUN             (1 << 18)       /* ex, c */
 121 #define R1_OVERRUN              (1 << 17)       /* ex, c */
 122 #define R1_CID_CSD_OVERWRITE    (1 << 16)       /* erx, c, CID/CSD overwrite */
 123 #define R1_WP_ERASE_SKIP        (1 << 15)       /* sx, c */
 124 #define R1_CARD_ECC_DISABLED    (1 << 14)       /* sx, a */
 125 #define R1_ERASE_RESET          (1 << 13)       /* sr, c */
 126 #define R1_STATUS(x)            (x & 0xFFFFE000)
 127 #define R1_CURRENT_STATE(x)     ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */
 128 #define R1_READY_FOR_DATA       (1 << 8)        /* sx, a */
 129 #define R1_APP_CMD              (1 << 5)        /* sr, c */
 130
 131 /* These are unpacked versions of the actual responses */
 132
 133 struct _mmc_csd {
 134         u8  csd_structure;
 135         u8  spec_vers;
 136         u8  taac;
 137         u8  nsac;
 138         u8  tran_speed;
 139         u16 ccc;
 140         u8  read_bl_len;
 141         u8  read_bl_partial;
 142         u8  write_blk_misalign;
 143         u8  read_blk_misalign;
 144         u8  dsr_imp;
 145         u16 c_size;
 146         u8  vdd_r_curr_min;
 147         u8  vdd_r_curr_max;
 148         u8  vdd_w_curr_min;
 149         u8  vdd_w_curr_max;
 150         u8  c_size_mult;
 151         union {
 152                 struct { /* MMC system specification version 3.1 */
 153                         u8  erase_grp_size;
 154                         u8  erase_grp_mult;
 155                 } v31;
 156                 struct { /* MMC system specification version 2.2 */
 157                         u8  sector_size;
 158                         u8  erase_grp_size;
 159                 } v22;
 160         } erase;
 161         u8  wp_grp_size;
 162         u8  wp_grp_enable;
 163         u8  default_ecc;
 164         u8  r2w_factor;
 165         u8  write_bl_len;
 166         u8  write_bl_partial;
 167         u8  file_format_grp;
 168         u8  copy;
 169         u8  perm_write_protect;
 170         u8  tmp_write_protect;
 171         u8  file_format;
 172         u8  ecc;
 173 };
 174
 175 /*
 176  * OCR bits are mostly in host.h
 177  */
 178 #define MMC_CARD_BUSY   0x80000000      /* Card Power up status bit */
 179
 180 /*
 181  * Card Command Classes (CCC)
 182  */
 183 #define CCC_BASIC               (1<<0)  /* (0) Basic protocol functions */
 184                                         /* (CMD0,1,2,3,4,7,9,10,12,13,15) */
 185 #define CCC_STREAM_READ         (1<<1)  /* (1) Stream read commands */
 186                                         /* (CMD11) */
 187 #define CCC_BLOCK_READ          (1<<2)  /* (2) Block read commands */
 188                                         /* (CMD16,17,18) */
 189 #define CCC_STREAM_WRITE        (1<<3)  /* (3) Stream write commands */
 190                                         /* (CMD20) */
 191 #define CCC_BLOCK_WRITE         (1<<4)  /* (4) Block write commands */
 192                                         /* (CMD16,24,25,26,27) */
 193 #define CCC_ERASE               (1<<5)  /* (5) Ability to erase blocks */
 194                                         /* (CMD32,33,34,35,36,37,38,39) */
 195 #define CCC_WRITE_PROT          (1<<6)  /* (6) Able to write protect blocks */
 196                                         /* (CMD28,29,30) */
 197 #define CCC_LOCK_CARD           (1<<7)  /* (7) Able to lock down card */
 198                                         /* (CMD16,CMD42) */
 199 #define CCC_APP_SPEC            (1<<8)  /* (8) Application specific */
 200                                         /* (CMD55,56,57,ACMD*) */
 201 #define CCC_IO_MODE             (1<<9)  /* (9) I/O mode */
 202                                         /* (CMD5,39,40,52,53) */
 203 #define CCC_SWITCH              (1<<10) /* (10) High speed switch */
 204                                         /* (CMD6,34,35,36,37,50) */
 205                                         /* (11) Reserved */
 206                                         /* (CMD?) */
 207
 208 /*
 209  * CSD field definitions
 210  */
 211
 212 #define CSD_STRUCT_VER_1_0  0           /* Valid for system specification 1.0 - 1.2 */
 213 #define CSD_STRUCT_VER_1_1  1           /* Valid for system specification 1.4 - 2.2 */
 214 #define CSD_STRUCT_VER_1_2  2           /* Valid for system specification 3.1 - 3.2 - 3.31 - 4.0 - 4.1 */
 215 #define CSD_STRUCT_EXT_CSD  3           /* Version is coded in CSD_STRUCTURE in EXT_CSD */
 216
 217 #define CSD_SPEC_VER_0      0           /* Implements system specification 1.0 - 1.2 */
 218 #define CSD_SPEC_VER_1      1           /* Implements system specification 1.4 */
 219 #define CSD_SPEC_VER_2      2           /* Implements system specification 2.0 - 2.2 */
 220 #define CSD_SPEC_VER_3      3           /* Implements system specification 3.1 - 3.2 - 3.31 */
 221 #define CSD_SPEC_VER_4      4           /* Implements system specification 4.0 - 4.1 */
 222
 223 /*
 224  * EXT_CSD fields
 225  */
 226
 227 #define EXT_CSD_BUS_WIDTH       183     /* R/W */
 228 #define EXT_CSD_HS_TIMING       185     /* R/W */
 229 #define EXT_CSD_CARD_TYPE       196     /* RO */
 230 #define EXT_CSD_SEC_CNT         212     /* RO, 4 bytes */
 231
 232 /*
 233  * EXT_CSD field definitions
 234  */
 235
 236 #define EXT_CSD_CMD_SET_NORMAL          (1<<0)
 237 #define EXT_CSD_CMD_SET_SECURE          (1<<1)
 238 #define EXT_CSD_CMD_SET_CPSECURE        (1<<2)
 239
 240 #define EXT_CSD_CARD_TYPE_26    (1<<0)  /* Card can run at 26MHz */
 241 #define EXT_CSD_CARD_TYPE_52    (1<<1)  /* Card can run at 52MHz */
 242
 243 #define EXT_CSD_BUS_WIDTH_1     0       /* Card is in 1 bit mode */
 244 #define EXT_CSD_BUS_WIDTH_4     1       /* Card is in 4 bit mode */
 245 #define EXT_CSD_BUS_WIDTH_8     2       /* Card is in 8 bit mode */
 246
 247 /*
 248  * MMC_SWITCH access modes
 249  */
 250
 251 #define MMC_SWITCH_MODE_CMD_SET         0x00    /* Change the command set */
 252 #define MMC_SWITCH_MODE_SET_BITS        0x01    /* Set bits which are 1 in value */
 253 #define MMC_SWITCH_MODE_CLEAR_BITS      0x02    /* Clear bits which are 1 in value */
 254 #define MMC_SWITCH_MODE_WRITE_BYTE      0x03    /* Set target to value */
 255
 256 #endif  /* MMC_MMC_PROTOCOL_H */
 257