1 /* $NetBSD: sdmmcreg.h,v 1.8 2012/01/27 03:07:21 matt Exp $ */ 2 /* $OpenBSD: sdmmcreg.h,v 1.4 2009/01/09 10:55:22 jsg Exp $ */ 3 4 /* 5 * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #ifndef _SDMMCREG_H_ 21 #define _SDMMCREG_H_ 22 23 /* MMC commands */ /* response type */ 24 #define MMC_GO_IDLE_STATE 0 /* R0 */ 25 #define MMC_SEND_OP_COND 1 /* R3 */ 26 #define MMC_ALL_SEND_CID 2 /* R2 */ 27 #define MMC_SET_RELATIVE_ADDR 3 /* R1 */ 28 #define MMC_SWITCH 6 /* R1b */ 29 #define MMC_SELECT_CARD 7 /* R1 */ 30 #define MMC_SEND_EXT_CSD 8 /* R1 */ 31 #define MMC_SEND_CSD 9 /* R2 */ 32 #define MMC_SEND_CID 10 /* R2 */ 33 #define MMC_STOP_TRANSMISSION 12 /* R1b */ 34 #define MMC_SEND_STATUS 13 /* R1 */ 35 #define MMC_INACTIVE_STATE 15 /* R0 */ 36 #define MMC_SET_BLOCKLEN 16 /* R1 */ 37 #define MMC_READ_BLOCK_SINGLE 17 /* R1 */ 38 #define MMC_READ_BLOCK_MULTIPLE 18 /* R1 */ 39 #define MMC_SET_BLOCK_COUNT 23 /* R1 */ 40 #define MMC_WRITE_BLOCK_SINGLE 24 /* R1 */ 41 #define MMC_WRITE_BLOCK_MULTIPLE 25 /* R1 */ 42 #define MMC_PROGRAM_CSD 27 /* R1 */ 43 #define MMC_SET_WRITE_PROT 28 /* R1b */ 44 #define MMC_SET_CLR_WRITE_PROT 29 /* R1b */ 45 #define MMC_SET_SEND_WRITE_PROT 30 /* R1 */ 46 #define MMC_TAG_SECTOR_START 32 /* R1 */ 47 #define MMC_TAG_SECTOR_END 33 /* R1 */ 48 #define MMC_UNTAG_SECTOR 34 /* R1 */ 49 #define MMC_TAG_ERASE_GROUP_START 35 /* R1 */ 50 #define MMC_TAG_ERASE_GROUP_END 36 /* R1 */ 51 #define MMC_UNTAG_ERASE_GROUP 37 /* R1 */ 52 #define MMC_ERASE 38 /* R1b */ 53 #define MMC_LOCK_UNLOCK 42 /* R1b */ 54 #define MMC_APP_CMD 55 /* R1 */ 55 #define MMC_READ_OCR 58 /* R3 */ 56 57 /* SD commands */ /* response type */ 58 #define SD_SEND_RELATIVE_ADDR 3 /* R6 */ 59 #define SD_SEND_SWITCH_FUNC 6 /* R1 */ 60 #define SD_SEND_IF_COND 8 /* R7 */ 61 62 /* SD application commands */ /* response type */ 63 #define SD_APP_SET_BUS_WIDTH 6 /* R1 */ 64 #define SD_APP_OP_COND 41 /* R3 */ 65 #define SD_APP_SEND_SCR 51 /* R1 */ 66 67 /* OCR bits */ 68 #define MMC_OCR_MEM_READY (1U<<31)/* memory power-up status bit */ 69 #define MMC_OCR_HCS (1<<30) 70 #define MMC_OCR_3_5V_3_6V (1<<23) 71 #define MMC_OCR_3_4V_3_5V (1<<22) 72 #define MMC_OCR_3_3V_3_4V (1<<21) 73 #define MMC_OCR_3_2V_3_3V (1<<20) 74 #define MMC_OCR_3_1V_3_2V (1<<19) 75 #define MMC_OCR_3_0V_3_1V (1<<18) 76 #define MMC_OCR_2_9V_3_0V (1<<17) 77 #define MMC_OCR_2_8V_2_9V (1<<16) 78 #define MMC_OCR_2_7V_2_8V (1<<15) 79 #define MMC_OCR_2_6V_2_7V (1<<14) 80 #define MMC_OCR_2_5V_2_6V (1<<13) 81 #define MMC_OCR_2_4V_2_5V (1<<12) 82 #define MMC_OCR_2_3V_2_4V (1<<11) 83 #define MMC_OCR_2_2V_2_3V (1<<10) 84 #define MMC_OCR_2_1V_2_2V (1<<9) 85 #define MMC_OCR_2_0V_2_1V (1<<8) 86 #define MMC_OCR_1_9V_2_0V (1<<7) 87 #define MMC_OCR_1_8V_1_9V (1<<6) 88 #define MMC_OCR_1_7V_1_8V (1<<5) 89 #define MMC_OCR_1_6V_1_7V (1<<4) 90 91 /* R1 response type bits */ 92 #define MMC_R1_READY_FOR_DATA (1<<8) /* ready for next transfer */ 93 #define MMC_R1_APP_CMD (1<<5) /* app. commands supported */ 94 95 /* 48-bit response decoding (32 bits w/o CRC) */ 96 #define MMC_R1(resp) ((resp)[0]) 97 #define MMC_R3(resp) ((resp)[0]) 98 #define SD_R6(resp) ((resp)[0]) 99 #define MMC_R7(resp) ((resp)[0]) 100 #define MMC_SPI_R1(resp) ((resp)[0]) 101 #define MMC_SPI_R7(resp) ((resp)[1]) 102 103 /* RCA argument and response */ 104 #define MMC_ARG_RCA(rca) ((rca) << 16) 105 #define SD_R6_RCA(resp) (SD_R6((resp)) >> 16) 106 107 /* bus width argument */ 108 #define SD_ARG_BUS_WIDTH_1 0 109 #define SD_ARG_BUS_WIDTH_4 2 110 111 /* EXT_CSD fields */ 112 #define EXT_CSD_BUS_WIDTH 183 /* WO */ 113 #define EXT_CSD_HS_TIMING 185 /* R/W */ 114 #define EXT_CSD_REV 192 /* RO */ 115 #define EXT_CSD_STRUCTURE 194 /* RO */ 116 #define EXT_CSD_CARD_TYPE 196 /* RO */ 117 118 /* EXT_CSD field definitions */ 119 #define EXT_CSD_CMD_SET_NORMAL (1U << 0) 120 #define EXT_CSD_CMD_SET_SECURE (1U << 1) 121 #define EXT_CSD_CMD_SET_CPSECURE (1U << 2) 122 123 /* EXT_CSD_BUS_WIDTH */ 124 #define EXT_CSD_BUS_WIDTH_1 0 /* 1 bit mode */ 125 #define EXT_CSD_BUS_WIDTH_4 1 /* 4 bit mode */ 126 #define EXT_CSD_BUS_WIDTH_8 2 /* 8 bit mode */ 127 128 /* EXT_CSD_STRUCTURE */ 129 #define EXT_CSD_STRUCTURE_VER_1_0 0 /* CSD Version No.1.0 */ 130 #define EXT_CSD_STRUCTURE_VER_1_1 1 /* CSD Version No.1.1 */ 131 #define EXT_CSD_STRUCTURE_VER_1_2 2 /* Version 4.1-4.2-4.3 */ 132 133 /* EXT_CSD_CARD_TYPE */ 134 #define EXT_CSD_CARD_TYPE_26M (1 << 0) 135 #define EXT_CSD_CARD_TYPE_52M (1 << 1) 136 137 /* MMC_SWITCH access mode */ 138 #define MMC_SWITCH_MODE_CMD_SET 0x00 /* Change the command set */ 139 #define MMC_SWITCH_MODE_SET_BITS 0x01 /* Set bits in value */ 140 #define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /* Clear bits in value */ 141 #define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value */ 142 143 /* SPI mode reports R1/R2(SEND_STATUS) status. */ 144 #define R1_SPI_IDLE (1 << 0) 145 #define R1_SPI_ERASE_RESET (1 << 1) 146 #define R1_SPI_ILLEGAL_COMMAND (1 << 2) 147 #define R1_SPI_COM_CRC (1 << 3) 148 #define R1_SPI_ERASE_SEQ (1 << 4) 149 #define R1_SPI_ADDRESS (1 << 5) 150 #define R1_SPI_PARAMETER (1 << 6) 151 /* R1 bit 7 is always zero */ 152 #define R2_SPI_CARD_LOCKED (1 << 8) 153 #define R2_SPI_WP_ERASE_SKIP (1 << 9) /* or lock/unlock fail */ 154 #define R2_SPI_LOCK_UNLOCK_FAIL R2_SPI_WP_ERASE_SKIP 155 #define R2_SPI_ERROR (1 << 10) 156 #define R2_SPI_CC_ERROR (1 << 11) 157 #define R2_SPI_CARD_ECC_ERROR (1 << 12) 158 #define R2_SPI_WP_VIOLATION (1 << 13) 159 #define R2_SPI_ERASE_PARAM (1 << 14) 160 #define R2_SPI_OUT_OF_RANGE (1 << 15) /* or CSD overwrite */ 161 #define R2_SPI_CSD_OVERWRITE R2_SPI_OUT_OF_RANGE 162 163 /* MMC R2 response (CSD) */ 164 #define MMC_CSD_CSDVER(resp) MMC_RSP_BITS((resp), 126, 2) 165 #define MMC_CSD_CSDVER_1_0 0 166 #define MMC_CSD_CSDVER_1_1 1 167 #define MMC_CSD_CSDVER_1_2 2 /* MMC 4.1 - 4.2 - 4.3 */ 168 #define MMC_CSD_CSDVER_EXT_CSD 3 /* Version is coded in CSD_STRUCTURE in EXT_CSD */ 169 #define MMC_CSD_MMCVER(resp) MMC_RSP_BITS((resp), 122, 4) 170 #define MMC_CSD_MMCVER_1_0 0 /* MMC 1.0 - 1.2 */ 171 #define MMC_CSD_MMCVER_1_4 1 /* MMC 1.4 */ 172 #define MMC_CSD_MMCVER_2_0 2 /* MMC 2.0 - 2.2 */ 173 #define MMC_CSD_MMCVER_3_1 3 /* MMC 3.1 - 3.3 */ 174 #define MMC_CSD_MMCVER_4_0 4 /* MMC 4.1 - 4.2 - 4.3 */ 175 #define MMC_CSD_TAAC(resp) MMC_RSP_BITS((resp), 112, 8) 176 #define MMC_CSD_TAAC_MANT(resp) MMC_RSP_BITS((resp), 115, 4) 177 #define MMC_CSD_TAAC_EXP(resp) MMC_RSP_BITS((resp), 112, 3) 178 #define MMC_CSD_NSAC(resp) MMC_RSP_BITS((resp), 104, 8) 179 #define MMC_CSD_TRAN_SPEED(resp) MMC_RSP_BITS((resp), 96, 8) 180 #define MMC_CSD_TRAN_SPEED_MANT(resp) MMC_RSP_BITS((resp), 99, 4) 181 #define MMC_CSD_TRAN_SPEED_EXP(resp) MMC_RSP_BITS((resp), 96, 3) 182 #define MMC_CSD_READ_BL_LEN(resp) MMC_RSP_BITS((resp), 80, 4) 183 #define MMC_CSD_C_SIZE(resp) MMC_RSP_BITS((resp), 62, 12) 184 #define MMC_CSD_CAPACITY(resp) ((MMC_CSD_C_SIZE((resp))+1) << \ 185 (MMC_CSD_C_SIZE_MULT((resp))+2)) 186 #define MMC_CSD_C_SIZE_MULT(resp) MMC_RSP_BITS((resp), 47, 3) 187 #define MMC_CSD_R2W_FACTOR(resp) MMC_RSP_BITS((resp), 26, 3) 188 #define MMC_CSD_WRITE_BL_LEN(resp) MMC_RSP_BITS((resp), 22, 4) 189 190 /* MMC v1 R2 response (CID) */ 191 #define MMC_CID_MID_V1(resp) MMC_RSP_BITS((resp), 104, 24) 192 #define MMC_CID_PNM_V1_CPY(resp, pnm) \ 193 do { \ 194 (pnm)[0] = MMC_RSP_BITS((resp), 96, 8); \ 195 (pnm)[1] = MMC_RSP_BITS((resp), 88, 8); \ 196 (pnm)[2] = MMC_RSP_BITS((resp), 80, 8); \ 197 (pnm)[3] = MMC_RSP_BITS((resp), 72, 8); \ 198 (pnm)[4] = MMC_RSP_BITS((resp), 64, 8); \ 199 (pnm)[5] = MMC_RSP_BITS((resp), 56, 8); \ 200 (pnm)[6] = MMC_RSP_BITS((resp), 48, 8); \ 201 (pnm)[7] = '\0'; \ 202 } while (/*CONSTCOND*/0) 203 #define MMC_CID_REV_V1(resp) MMC_RSP_BITS((resp), 40, 8) 204 #define MMC_CID_PSN_V1(resp) MMC_RSP_BITS((resp), 16, 24) 205 #define MMC_CID_MDT_V1(resp) MMC_RSP_BITS((resp), 8, 8) 206 207 /* MMC v2 R2 response (CID) */ 208 #define MMC_CID_MID_V2(resp) MMC_RSP_BITS((resp), 120, 8) 209 #define MMC_CID_OID_V2(resp) MMC_RSP_BITS((resp), 104, 16) 210 #define MMC_CID_PNM_V2_CPY(resp, pnm) \ 211 do { \ 212 (pnm)[0] = MMC_RSP_BITS((resp), 96, 8); \ 213 (pnm)[1] = MMC_RSP_BITS((resp), 88, 8); \ 214 (pnm)[2] = MMC_RSP_BITS((resp), 80, 8); \ 215 (pnm)[3] = MMC_RSP_BITS((resp), 72, 8); \ 216 (pnm)[4] = MMC_RSP_BITS((resp), 64, 8); \ 217 (pnm)[5] = MMC_RSP_BITS((resp), 56, 8); \ 218 (pnm)[6] = '\0'; \ 219 } while (/*CONSTCOND*/0) 220 #define MMC_CID_PSN_V2(resp) MMC_RSP_BITS((resp), 16, 32) 221 222 /* SD R2 response (CSD) */ 223 #define SD_CSD_CSDVER(resp) MMC_RSP_BITS((resp), 126, 2) 224 #define SD_CSD_CSDVER_1_0 0 225 #define SD_CSD_CSDVER_2_0 1 226 #define SD_CSD_MMCVER(resp) MMC_RSP_BITS((resp), 122, 4) 227 #define SD_CSD_TAAC(resp) MMC_RSP_BITS((resp), 112, 8) 228 #define SD_CSD_TAAC_EXP(resp) MMC_RSP_BITS((resp), 115, 4) 229 #define SD_CSD_TAAC_MANT(resp) MMC_RSP_BITS((resp), 112, 3) 230 #define SD_CSD_TAAC_1_5_MSEC 0x26 231 #define SD_CSD_NSAC(resp) MMC_RSP_BITS((resp), 104, 8) 232 #define SD_CSD_SPEED(resp) MMC_RSP_BITS((resp), 96, 8) 233 #define SD_CSD_SPEED_MANT(resp) MMC_RSP_BITS((resp), 99, 4) 234 #define SD_CSD_SPEED_EXP(resp) MMC_RSP_BITS((resp), 96, 3) 235 #define SD_CSD_SPEED_25_MHZ 0x32 236 #define SD_CSD_SPEED_50_MHZ 0x5a 237 #define SD_CSD_CCC(resp) MMC_RSP_BITS((resp), 84, 12) 238 #define SD_CSD_CCC_BASIC (1 << 0) /* basic */ 239 #define SD_CSD_CCC_BR (1 << 2) /* block read */ 240 #define SD_CSD_CCC_BW (1 << 4) /* block write */ 241 #define SD_CSD_CCC_ERACE (1 << 5) /* erase */ 242 #define SD_CSD_CCC_WP (1 << 6) /* write protection */ 243 #define SD_CSD_CCC_LC (1 << 7) /* lock card */ 244 #define SD_CSD_CCC_AS (1 << 8) /*application specific*/ 245 #define SD_CSD_CCC_IOM (1 << 9) /* I/O mode */ 246 #define SD_CSD_CCC_SWITCH (1 << 10) /* switch */ 247 #define SD_CSD_READ_BL_LEN(resp) MMC_RSP_BITS((resp), 80, 4) 248 #define SD_CSD_READ_BL_PARTIAL(resp) MMC_RSP_BITS((resp), 79, 1) 249 #define SD_CSD_WRITE_BLK_MISALIGN(resp) MMC_RSP_BITS((resp), 78, 1) 250 #define SD_CSD_READ_BLK_MISALIGN(resp) MMC_RSP_BITS((resp), 77, 1) 251 #define SD_CSD_DSR_IMP(resp) MMC_RSP_BITS((resp), 76, 1) 252 #define SD_CSD_C_SIZE(resp) MMC_RSP_BITS((resp), 62, 12) 253 #define SD_CSD_CAPACITY(resp) ((SD_CSD_C_SIZE((resp))+1) << \ 254 (SD_CSD_C_SIZE_MULT((resp))+2)) 255 #define SD_CSD_VDD_R_CURR_MIN(resp) MMC_RSP_BITS((resp), 59, 3) 256 #define SD_CSD_VDD_R_CURR_MAX(resp) MMC_RSP_BITS((resp), 56, 3) 257 #define SD_CSD_VDD_W_CURR_MIN(resp) MMC_RSP_BITS((resp), 53, 3) 258 #define SD_CSD_VDD_W_CURR_MAX(resp) MMC_RSP_BITS((resp), 50, 3) 259 #define SD_CSD_VDD_RW_CURR_100mA 0x7 260 #define SD_CSD_VDD_RW_CURR_80mA 0x6 261 #define SD_CSD_V2_C_SIZE(resp) MMC_RSP_BITS((resp), 48, 22) 262 #define SD_CSD_V2_CAPACITY(resp) ((SD_CSD_V2_C_SIZE((resp))+1) << 10) 263 #define SD_CSD_V2_BL_LEN 0x9 /* 512 */ 264 #define SD_CSD_C_SIZE_MULT(resp) MMC_RSP_BITS((resp), 47, 3) 265 #define SD_CSD_ERASE_BLK_EN(resp) MMC_RSP_BITS((resp), 46, 1) 266 #define SD_CSD_SECTOR_SIZE(resp) MMC_RSP_BITS((resp), 39, 7) /* +1 */ 267 #define SD_CSD_WP_GRP_SIZE(resp) MMC_RSP_BITS((resp), 32, 7) /* +1 */ 268 #define SD_CSD_WP_GRP_ENABLE(resp) MMC_RSP_BITS((resp), 31, 1) 269 #define SD_CSD_R2W_FACTOR(resp) MMC_RSP_BITS((resp), 26, 3) 270 #define SD_CSD_WRITE_BL_LEN(resp) MMC_RSP_BITS((resp), 22, 4) 271 #define SD_CSD_RW_BL_LEN_2G 0xa 272 #define SD_CSD_RW_BL_LEN_1G 0x9 273 #define SD_CSD_WRITE_BL_PARTIAL(resp) MMC_RSP_BITS((resp), 21, 1) 274 #define SD_CSD_FILE_FORMAT_GRP(resp) MMC_RSP_BITS((resp), 15, 1) 275 #define SD_CSD_COPY(resp) MMC_RSP_BITS((resp), 14, 1) 276 #define SD_CSD_PERM_WRITE_PROTECT(resp) MMC_RSP_BITS((resp), 13, 1) 277 #define SD_CSD_TMP_WRITE_PROTECT(resp) MMC_RSP_BITS((resp), 12, 1) 278 #define SD_CSD_FILE_FORMAT(resp) MMC_RSP_BITS((resp), 10, 2) 279 280 /* SD R2 response (CID) */ 281 #define SD_CID_MID(resp) MMC_RSP_BITS((resp), 120, 8) 282 #define SD_CID_OID(resp) MMC_RSP_BITS((resp), 104, 16) 283 #define SD_CID_PNM_CPY(resp, pnm) \ 284 do { \ 285 (pnm)[0] = MMC_RSP_BITS((resp), 96, 8); \ 286 (pnm)[1] = MMC_RSP_BITS((resp), 88, 8); \ 287 (pnm)[2] = MMC_RSP_BITS((resp), 80, 8); \ 288 (pnm)[3] = MMC_RSP_BITS((resp), 72, 8); \ 289 (pnm)[4] = MMC_RSP_BITS((resp), 64, 8); \ 290 (pnm)[5] = '\0'; \ 291 } while (/*CONSTCOND*/0) 292 #define SD_CID_REV(resp) MMC_RSP_BITS((resp), 56, 8) 293 #define SD_CID_PSN(resp) MMC_RSP_BITS((resp), 24, 32) 294 #define SD_CID_MDT(resp) MMC_RSP_BITS((resp), 8, 12) 295 296 /* SCR (SD Configuration Register) */ 297 #define SCR_STRUCTURE(scr) MMC_RSP_BITS((scr), 60, 4) 298 #define SCR_STRUCTURE_VER_1_0 0 /* Version 1.0 */ 299 #define SCR_SD_SPEC(scr) MMC_RSP_BITS((scr), 56, 4) 300 #define SCR_SD_SPEC_VER_1_0 0 /* Version 1.0 and 1.01 */ 301 #define SCR_SD_SPEC_VER_1_10 1 /* Version 1.10 */ 302 #define SCR_SD_SPEC_VER_2 2 /* Version 2.00 or Version 3.0X */ 303 #define SCR_DATA_STAT_AFTER_ERASE(scr) MMC_RSP_BITS((scr), 55, 1) 304 #define SCR_SD_SECURITY(scr) MMC_RSP_BITS((scr), 52, 3) 305 #define SCR_SD_SECURITY_NONE 0 /* no security */ 306 #define SCR_SD_SECURITY_1_0 1 /* security protocol 1.0 */ 307 #define SCR_SD_SECURITY_1_0_2 2 /* security protocol 1.0 */ 308 #define SCR_SD_BUS_WIDTHS(scr) MMC_RSP_BITS((scr), 48, 4) 309 #define SCR_SD_BUS_WIDTHS_1BIT (1 << 0) /* 1bit (DAT0) */ 310 #define SCR_SD_BUS_WIDTHS_4BIT (1 << 2) /* 4bit (DAT0-3) */ 311 #define SCR_RESERVED(scr) MMC_RSP_BITS((scr), 32, 16) 312 #define SCR_RESERVED2(scr) MMC_RSP_BITS((scr), 0, 32) 313 314 /* Status of Switch Function */ 315 #define SFUNC_STATUS_GROUP(status, group) \ 316 be16toh(__bitfield((uint32_t *)(status), (7 - (group)) << 4, 16)) 317 318 /* Might be slow, but it should work on big and little endian systems. */ 319 320 321 /* The macro used to do a (start)-8 to work around a bug in hardware see sdhc.c 322 * of the openbsd mmc code driver. 323 */ 324 #define MMC_RSP_BITS(resp, start, len) __bitfield((resp), (start), (len)) 325 static inline int 326 __bitfield(uint32_t *src, int start, int len) 327 { 328 uint8_t *sp; 329 uint32_t dst, mask; 330 int shift, bs, bc; 331 332 if (start < 0 || len < 0 || len > 32) 333 return 0; 334 335 dst = 0; 336 mask = len % 32 ? UINT_MAX >> (32 - (len % 32)) : UINT_MAX; 337 shift = 0; 338 339 while (len > 0) { 340 sp = (uint8_t *)src + start / 8; 341 bs = start % 8; 342 bc = 8 - bs; 343 if (bc > len) 344 bc = len; 345 dst |= (*sp >> bs) << shift; 346 shift += bc; 347 start += bc; 348 len -= bc; 349 } 350 351 dst &= mask; 352 return (int)dst; 353 } 354 355 #endif /* _SDMMCREG_H_ */ 356