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  *
  20  * Author:  Andrew Christian
  21  *          15 May 2002
  22  */
  23
  24 #ifndef MMC_MMC_H
  25 #define MMC_MMC_H
  26
  27 /* Standard MMC commands (4.1)           type  argument     response */
  28    /* class 1 */
  29 #define MMC_GO_IDLE_STATE         0   /* bc                          */
  30 #define MMC_SEND_OP_COND          1   /* bcr  [31:0] OCR         R3  */
  31 #define MMC_ALL_SEND_CID          2   /* bcr                     R2  */
  32 #define MMC_SET_RELATIVE_ADDR     3   /* ac   [31:16] RCA        R1  */
  33 #define MMC_SET_DSR               4   /* bc   [31:16] RCA            */
  34 #define MMC_SLEEP_AWAKE           5   /* ac   [31:16] RCA 15:flg R1b */
  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_BUS_TEST_R           14   /* adtc                    R1  */
  44 #define MMC_GO_INACTIVE_STATE    15   /* ac   [31:16] RCA            */
  45 #define MMC_BUS_TEST_W           19   /* adtc                    R1  */
  46 #define MMC_SPI_READ_OCR         58   /* spi                  spi_R3 */
  47 #define MMC_SPI_CRC_ON_OFF       59   /* spi  [0:0] flag      spi_R1 */
  48
  49   /* class 2 */
  50 #define MMC_SET_BLOCKLEN         16   /* ac   [31:0] block len   R1  */
  51 #define MMC_READ_SINGLE_BLOCK    17   /* adtc [31:0] data addr   R1  */
  52 #define MMC_READ_MULTIPLE_BLOCK  18   /* adtc [31:0] data addr   R1  */
  53
  54   /* class 3 */
  55 #define MMC_WRITE_DAT_UNTIL_STOP 20   /* adtc [31:0] data addr   R1  */
  56
  57   /* class 4 */
  58 #define MMC_SET_BLOCK_COUNT      23   /* adtc [31:0] data addr   R1  */
  59 #define MMC_WRITE_BLOCK          24   /* adtc [31:0] data addr   R1  */
  60 #define MMC_WRITE_MULTIPLE_BLOCK 25   /* adtc                    R1  */
  61 #define MMC_PROGRAM_CID          26   /* adtc                    R1  */
  62 #define MMC_PROGRAM_CSD          27   /* adtc                    R1  */
  63
  64   /* class 6 */
  65 #define MMC_SET_WRITE_PROT       28   /* ac   [31:0] data addr   R1b */
  66 #define MMC_CLR_WRITE_PROT       29   /* ac   [31:0] data addr   R1b */
  67 #define MMC_SEND_WRITE_PROT      30   /* adtc [31:0] wpdata addr R1  */
  68
  69   /* class 5 */
  70 #define MMC_ERASE_GROUP_START    35   /* ac   [31:0] data addr   R1  */
  71 #define MMC_ERASE_GROUP_END      36   /* ac   [31:0] data addr   R1  */
  72 #define MMC_ERASE                38   /* ac                      R1b */
  73
  74   /* class 9 */
  75 #define MMC_FAST_IO              39   /* ac   <Complex>          R4  */
  76 #define MMC_GO_IRQ_STATE         40   /* bcr                     R5  */
  77
  78   /* class 7 */
  79 #define MMC_LOCK_UNLOCK          42   /* adtc                    R1b */
  80
  81   /* class 8 */
  82 #define MMC_APP_CMD              55   /* ac   [31:16] RCA        R1  */
  83 #define MMC_GEN_CMD              56   /* adtc [0] RD/WR          R1  */
  84
  85 /*
  86  * MMC_SWITCH argument format:
  87  *
  88  *      [31:26] Always 0
  89  *      [25:24] Access Mode
  90  *      [23:16] Location of target Byte in EXT_CSD
  91  *      [15:08] Value Byte
  92  *      [07:03] Always 0
  93  *      [02:00] Command Set
  94  */
  95
  96 /*
  97   MMC status in R1, for native mode (SPI bits are different)
  98   Type
  99         e : error bit
 100         s : status bit
 101         r : detected and set for the actual command response
 102         x : detected and set during command execution. the host must poll
 103             the card by sending status command in order to read these bits.
 104   Clear condition
 105         a : according to the card state
 106         b : always related to the previous command. Reception of
 107             a valid command will clear it (with a delay of one command)
 108         c : clear by read
 109  */
 110
 111 #define R1_OUT_OF_RANGE         (1 << 31)       /* er, c */
 112 #define R1_ADDRESS_ERROR        (1 << 30)       /* erx, c */
 113 #define R1_BLOCK_LEN_ERROR      (1 << 29)       /* er, c */
 114 #define R1_ERASE_SEQ_ERROR      (1 << 28)       /* er, c */
 115 #define R1_ERASE_PARAM          (1 << 27)       /* ex, c */
 116 #define R1_WP_VIOLATION         (1 << 26)       /* erx, c */
 117 #define R1_CARD_IS_LOCKED       (1 << 25)       /* sx, a */
 118 #define R1_LOCK_UNLOCK_FAILED   (1 << 24)       /* erx, c */
 119 #define R1_COM_CRC_ERROR        (1 << 23)       /* er, b */
 120 #define R1_ILLEGAL_COMMAND      (1 << 22)       /* er, b */
 121 #define R1_CARD_ECC_FAILED      (1 << 21)       /* ex, c */
 122 #define R1_CC_ERROR             (1 << 20)       /* erx, c */
 123 #define R1_ERROR                (1 << 19)       /* erx, c */
 124 #define R1_UNDERRUN             (1 << 18)       /* ex, c */
 125 #define R1_OVERRUN              (1 << 17)       /* ex, c */
 126 #define R1_CID_CSD_OVERWRITE    (1 << 16)       /* erx, c, CID/CSD overwrite */
 127 #define R1_WP_ERASE_SKIP        (1 << 15)       /* sx, c */
 128 #define R1_CARD_ECC_DISABLED    (1 << 14)       /* sx, a */
 129 #define R1_ERASE_RESET          (1 << 13)       /* sr, c */
 130 #define R1_STATUS(x)            (x & 0xFFFFE000)
 131 #define R1_CURRENT_STATE(x)     ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */
 132 #define R1_READY_FOR_DATA       (1 << 8)        /* sx, a */
 133 #define R1_SWITCH_ERROR         (1 << 7)        /* sx, c */
 134 #define R1_APP_CMD              (1 << 5)        /* sr, c */
 135
 136 /*
 137  * MMC/SD in SPI mode reports R1 status always, and R2 for SEND_STATUS
 138  * R1 is the low order byte; R2 is the next highest byte, when present.
 139  */
 140 #define R1_SPI_IDLE             (1 << 0)
 141 #define R1_SPI_ERASE_RESET      (1 << 1)
 142 #define R1_SPI_ILLEGAL_COMMAND  (1 << 2)
 143 #define R1_SPI_COM_CRC          (1 << 3)
 144 #define R1_SPI_ERASE_SEQ        (1 << 4)
 145 #define R1_SPI_ADDRESS          (1 << 5)
 146 #define R1_SPI_PARAMETER        (1 << 6)
 147 /* R1 bit 7 is always zero */
 148 #define R2_SPI_CARD_LOCKED      (1 << 8)
 149 #define R2_SPI_WP_ERASE_SKIP    (1 << 9)        /* or lock/unlock fail */
 150 #define R2_SPI_LOCK_UNLOCK_FAIL R2_SPI_WP_ERASE_SKIP
 151 #define R2_SPI_ERROR            (1 << 10)
 152 #define R2_SPI_CC_ERROR         (1 << 11)
 153 #define R2_SPI_CARD_ECC_ERROR   (1 << 12)
 154 #define R2_SPI_WP_VIOLATION     (1 << 13)
 155 #define R2_SPI_ERASE_PARAM      (1 << 14)
 156 #define R2_SPI_OUT_OF_RANGE     (1 << 15)       /* or CSD overwrite */
 157 #define R2_SPI_CSD_OVERWRITE    R2_SPI_OUT_OF_RANGE
 158
 159 /* These are unpacked versions of the actual responses */
 160
 161 struct _mmc_csd {
 162         u8  csd_structure;
 163         u8  spec_vers;
 164         u8  taac;
 165         u8  nsac;
 166         u8  tran_speed;
 167         u16 ccc;
 168         u8  read_bl_len;
 169         u8  read_bl_partial;
 170         u8  write_blk_misalign;
 171         u8  read_blk_misalign;
 172         u8  dsr_imp;
 173         u16 c_size;
 174         u8  vdd_r_curr_min;
 175         u8  vdd_r_curr_max;
 176         u8  vdd_w_curr_min;
 177         u8  vdd_w_curr_max;
 178         u8  c_size_mult;
 179         union {
 180                 struct { /* MMC system specification version 3.1 */
 181                         u8  erase_grp_size;
 182                         u8  erase_grp_mult;
 183                 } v31;
 184                 struct { /* MMC system specification version 2.2 */
 185                         u8  sector_size;
 186                         u8  erase_grp_size;
 187                 } v22;
 188         } erase;
 189         u8  wp_grp_size;
 190         u8  wp_grp_enable;
 191         u8  default_ecc;
 192         u8  r2w_factor;
 193         u8  write_bl_len;
 194         u8  write_bl_partial;
 195         u8  file_format_grp;
 196         u8  copy;
 197         u8  perm_write_protect;
 198         u8  tmp_write_protect;
 199         u8  file_format;
 200         u8  ecc;
 201 };
 202
 203 /*
 204  * OCR bits are mostly in host.h
 205  */
 206 #define MMC_CARD_BUSY   0x80000000      /* Card Power up status bit */
 207
 208 /*
 209  * Card Command Classes (CCC)
 210  */
 211 #define CCC_BASIC               (1<<0)  /* (0) Basic protocol functions */
 212                                         /* (CMD0,1,2,3,4,7,9,10,12,13,15) */
 213                                         /* (and for SPI, CMD58,59) */
 214 #define CCC_STREAM_READ         (1<<1)  /* (1) Stream read commands */
 215                                         /* (CMD11) */
 216 #define CCC_BLOCK_READ          (1<<2)  /* (2) Block read commands */
 217                                         /* (CMD16,17,18) */
 218 #define CCC_STREAM_WRITE        (1<<3)  /* (3) Stream write commands */
 219                                         /* (CMD20) */
 220 #define CCC_BLOCK_WRITE         (1<<4)  /* (4) Block write commands */
 221                                         /* (CMD16,24,25,26,27) */
 222 #define CCC_ERASE               (1<<5)  /* (5) Ability to erase blocks */
 223                                         /* (CMD32,33,34,35,36,37,38,39) */
 224 #define CCC_WRITE_PROT          (1<<6)  /* (6) Able to write protect blocks */
 225                                         /* (CMD28,29,30) */
 226 #define CCC_LOCK_CARD           (1<<7)  /* (7) Able to lock down card */
 227                                         /* (CMD16,CMD42) */
 228 #define CCC_APP_SPEC            (1<<8)  /* (8) Application specific */
 229                                         /* (CMD55,56,57,ACMD*) */
 230 #define CCC_IO_MODE             (1<<9)  /* (9) I/O mode */
 231                                         /* (CMD5,39,40,52,53) */
 232 #define CCC_SWITCH              (1<<10) /* (10) High speed switch */
 233                                         /* (CMD6,34,35,36,37,50) */
 234                                         /* (11) Reserved */
 235                                         /* (CMD?) */
 236
 237 /*
 238  * CSD field definitions
 239  */
 240
 241 #define CSD_STRUCT_VER_1_0  0           /* Valid for system specification 1.0 - 1.2 */
 242 #define CSD_STRUCT_VER_1_1  1           /* Valid for system specification 1.4 - 2.2 */
 243 #define CSD_STRUCT_VER_1_2  2           /* Valid for system specification 3.1 - 3.2 - 3.31 - 4.0 - 4.1 */
 244 #define CSD_STRUCT_EXT_CSD  3           /* Version is coded in CSD_STRUCTURE in EXT_CSD */
 245
 246 #define CSD_SPEC_VER_0      0           /* Implements system specification 1.0 - 1.2 */
 247 #define CSD_SPEC_VER_1      1           /* Implements system specification 1.4 */
 248 #define CSD_SPEC_VER_2      2           /* Implements system specification 2.0 - 2.2 */
 249 #define CSD_SPEC_VER_3      3           /* Implements system specification 3.1 - 3.2 - 3.31 */
 250 #define CSD_SPEC_VER_4      4           /* Implements system specification 4.0 - 4.1 */
 251
 252 /*
 253  * EXT_CSD fields
 254  */
 255
 256 #define EXT_CSD_ERASE_GROUP_DEF         175     /* R/W */
 257 #define EXT_CSD_ERASED_MEM_CONT         181     /* RO */
 258 #define EXT_CSD_BUS_WIDTH               183     /* R/W */
 259 #define EXT_CSD_HS_TIMING               185     /* R/W */
 260 #define EXT_CSD_REV                     192     /* RO */
 261 #define EXT_CSD_STRUCTURE               194     /* RO */
 262 #define EXT_CSD_CARD_TYPE               196     /* RO */
 263 #define EXT_CSD_SEC_CNT                 212     /* RO, 4 bytes */
 264 #define EXT_CSD_S_A_TIMEOUT             217     /* RO */
 265 #define EXT_CSD_ERASE_TIMEOUT_MULT      223     /* RO */
 266 #define EXT_CSD_HC_ERASE_GRP_SIZE       224     /* RO */
 267 #define EXT_CSD_SEC_TRIM_MULT           229     /* RO */
 268 #define EXT_CSD_SEC_ERASE_MULT          230     /* RO */
 269 #define EXT_CSD_SEC_FEATURE_SUPPORT     231     /* RO */
 270 #define EXT_CSD_TRIM_MULT               232     /* RO */
 271
 272 /*
 273  * EXT_CSD field definitions
 274  */
 275
 276 #define EXT_CSD_CMD_SET_NORMAL          (1<<0)
 277 #define EXT_CSD_CMD_SET_SECURE          (1<<1)
 278 #define EXT_CSD_CMD_SET_CPSECURE        (1<<2)
 279
 280 #define EXT_CSD_CARD_TYPE_26    (1<<0)  /* Card can run at 26MHz */
 281 #define EXT_CSD_CARD_TYPE_52    (1<<1)  /* Card can run at 52MHz */
 282 #define EXT_CSD_CARD_TYPE_MASK  0xF     /* Mask out reserved bits */
 283 #define EXT_CSD_CARD_TYPE_DDR_1_8V  (1<<2)   /* Card can run at 52MHz */
 284                                              /* DDR mode @1.8V or 3V I/O */
 285 #define EXT_CSD_CARD_TYPE_DDR_1_2V  (1<<3)   /* Card can run at 52MHz */
 286                                              /* DDR mode @1.2V I/O */
 287 #define EXT_CSD_CARD_TYPE_DDR_52       (EXT_CSD_CARD_TYPE_DDR_1_8V  \
 288                                         | EXT_CSD_CARD_TYPE_DDR_1_2V)
 289
 290 #define EXT_CSD_BUS_WIDTH_1     0       /* Card is in 1 bit mode */
 291 #define EXT_CSD_BUS_WIDTH_4     1       /* Card is in 4 bit mode */
 292 #define EXT_CSD_BUS_WIDTH_8     2       /* Card is in 8 bit mode */
 293 #define EXT_CSD_DDR_BUS_WIDTH_4 5       /* Card is in 4 bit DDR mode */
 294 #define EXT_CSD_DDR_BUS_WIDTH_8 6       /* Card is in 8 bit DDR mode */
 295
 296 #define EXT_CSD_SEC_ER_EN       BIT(0)
 297 #define EXT_CSD_SEC_BD_BLK_EN   BIT(2)
 298 #define EXT_CSD_SEC_GB_CL_EN    BIT(4)
 299
 300 /*
 301  * MMC_SWITCH access modes
 302  */
 303
 304 #define MMC_SWITCH_MODE_CMD_SET         0x00    /* Change the command set */
 305 #define MMC_SWITCH_MODE_SET_BITS        0x01    /* Set bits which are 1 in value */
 306 #define MMC_SWITCH_MODE_CLEAR_BITS      0x02    /* Clear bits which are 1 in value */
 307 #define MMC_SWITCH_MODE_WRITE_BYTE      0x03    /* Set target to value */
 308
 309 #endif  /* MMC_MMC_PROTOCOL_H */
 310