avr/mmc.c

   1 /*-----------------------------------------------------------------------*/
   2 /* MMCv3/SDv1/SDv2 (in SPI mode) control module  (C)ChaN, 2007             */
   3 /*-----------------------------------------------------------------------*/
   4 /* Only spi_rcvr(), spi_xmit(), disk_timerproc() and some macros         */
   5 /* are platform dependent.                                               */
   6 /*-----------------------------------------------------------------------*/
   7
   8 #include "common.h"
   9 #include <stdbool.h>
  10 #include "timer.h"
  11 #include "spi.h"
  12 #include "diskio.h"
  13 #include "debug.h"
  14
  15 #define MAX_DRV         2
  16
  17 /* Port Controls  (Platform dependent) */
  18 /* SD card socket connections */
  19
  20 /* TODO: config.h cofig macros */
  21
  22 //#define SD_CD_0               SBIT(PORT,)             /* Card detect switch */
  23 //#define SD_CD_0_IN    SBIT(PIN,)
  24 //#define SD_CD_0_DDR   SBIT(DDR,)
  25
  26 //#define SD_WP_0               SBIT(PORT,)             /* Write protect switch */
  27 //#define SD_WP_0_IN    SBIT(PIN,)
  28 //#define SD_WP_0_DDR   SBIT(DDR,)
  29
  30 #define SD_CS_0         SBIT(PORTB,0)   /* Chip select pin */
  31 #define SD_CS_0_IN      SBIT(PINB,0)
  32 #define SD_CS_0_DDR     SBIT(DDRB,0)
  33
  34
  35 //#define SD_CD_1               SBIT(PORTG,3)   /* Card detect switch */
  36 //#define SD_CD_1_IN    SBIT(PING,3)
  37 //#define SD_CD_1_DDR   SBIT(DDRG,3)
  38
  39 //#define SD_WP_1               SBIT(PORTG,5)   /* Write protect switch */
  40 //#define SD_WP_1_IN    SBIT(PING,5)
  41 //#define SD_WP_1_DDR   SBIT(DDRG,5)
  42
  43 #define SD_CS_1         SBIT(PORTG,4)           /* Chip select pin */
  44 #define SD_CS_1_IN      SBIT(PING,4)
  45 #define SD_CS_1_DDR     SBIT(DDRG,4)
  46
  47
  48 #define SPI_CLK_SLOW()  SPISetMMCInitClock()    /* Set slow clock (100k-400k) */
  49 #define SPI_CLK_FAST()  SPISetFastClock()               /* Set fast clock (depends on the CSD) */
  50
  51 /*--------------------------------------------------------------------------
  52  Definitions for MMC/SDC command
  53  ---------------------------------------------------------------------------*/
  54
  55 #define CMD0    (0)                     /* GO_IDLE_STATE */
  56 #define CMD1    (1)                     /* SEND_OP_COND (MMC) */
  57 #define ACMD41  (0x80+41)       /* SEND_OP_COND (SDC) */
  58 #define CMD8    (8)                     /* SEND_IF_COND */
  59 #define CMD9    (9)                     /* SEND_CSD */
  60 #define CMD10   (10)            /* SEND_CID */
  61 #define CMD12   (12)            /* STOP_TRANSMISSION */
  62 #define ACMD13  (0x80+13)       /* SD_STATUS (SDC) */
  63 #define CMD16   (16)            /* SET_BLOCKLEN */
  64 #define CMD17   (17)            /* READ_SINGLE_BLOCK */
  65 #define CMD18   (18)            /* READ_MULTIPLE_BLOCK */
  66 #define CMD23   (23)            /* SET_BLOCK_COUNT (MMC) */
  67 #define ACMD23  (0x80+23)       /* SET_WR_BLK_ERASE_COUNT (SDC) */
  68 #define CMD24   (24)            /* WRITE_BLOCK */
  69 #define CMD25   (25)            /* WRITE_MULTIPLE_BLOCK */
  70 #define CMD55   (55)            /* APP_CMD */
  71 #define CMD58   (58)            /* READ_OCR */
  72
  73
  74 /*--------------------------------------------------------------------------
  75
  76  Module Private Functions
  77
  78  ---------------------------------------------------------------------------*/
  79
  80 struct sdsock_stat_s {
  81         volatile DSTATUS stat;  /* Disk/socket status */
  82         BYTE CardType;          /* Card type flags */
  83 };
  84
  85 static
  86 struct sdsock_stat_s
  87         socket[MAX_DRV] = {
  88                 {.stat=STA_NOINIT},
  89                 {.stat=STA_NOINIT}
  90         };
  91
  92 /*-----------------------------------------------------------------------*/
  93 /* Wait for card ready                                                   */
  94 /*-----------------------------------------------------------------------*/
  95
  96 static
  97 int wait_ready (void)   /* 1:OK, 0:Timeout */
  98 {
  99         uint32_t to = get_timer(0);
 100
 101         /* Wait for ready in timeout of 500ms */
 102         do {
 103                 if (spi_rcvr() == 0xFF) {
 104                         return 1;
 105                 }
 106         } while (get_timer(to) < 500);
 107
 108         return 0;
 109 }
 110
 111 /*-----------------------------------------------------------------------*/
 112 /* Deselect the card and release SPI bus                                 */
 113 /*-----------------------------------------------------------------------*/
 114
 115 static
 116 void deselect(BYTE drv)
 117 {
 118         //debug("*** enter deselect()\n");
 119         if (drv == 0)
 120                 SD_CS_0 = 1;
 121         else {
 122                 SD_CS_1 = 1;
 123         }
 124
 125         /* Dummy clock (TODO: force DO hi-z for multiple slave SPI) */
 126         if (socket[drv].stat & STA_FAST)
 127                 SPI_CLK_FAST();
 128         else
 129                 SPI_CLK_SLOW();
 130         spi_rcvr();
 131         SPI_OFF();
 132
 133         if (drv == 0) {
 134 #ifndef SD_CD_0
 135                 // SD_CS_0 = 1;
 136 #endif
 137         } else {
 138 #ifndef SD_CD_1
 139                 SD_CS_1_DDR = 0;
 140                 SD_CS_1 = 0;
 141 #endif
 142         }
 143         //debug("***  exit deselect()\n");
 144 }
 145
 146 /*-----------------------------------------------------------------------*/
 147 /* Select the card and wait for ready                                    */
 148 /*-----------------------------------------------------------------------*/
 149
 150 static
 151 int select(BYTE drv)    /* 1:Successful, 0:Timeout */
 152 {
 153         //debug("*** enter select()\n");
 154         if (drv == 0)
 155                 SD_CS_0 = 0;
 156         else {
 157 #ifndef SD_CD_1
 158                 SD_CS_1 = 1;
 159                 SD_CS_1_DDR = 1;
 160 #endif
 161                 SD_CS_1 = 0;
 162         }
 163
 164         if (socket[drv].stat & STA_FAST)
 165                 SPI_CLK_FAST();
 166         else
 167                 SPI_CLK_SLOW();
 168
 169         /* Dummy clock (force DO enabled) */
 170         spi_rcvr();
 171
 172         if (wait_ready()) {
 173                 //debug("***  exit select() == 1\n");
 174                 return 1;       /* OK */
 175         }
 176         deselect(drv);
 177         //debug("***  exit select() == 0\n");
 178
 179         return 0;       /* Timeout */
 180 }
 181
 182 /*-----------------------------------------------------------------------*/
 183 /* Power Control  (Platform dependent)                                   */
 184 /*-----------------------------------------------------------------------*/
 185 /* When the target system does not support socket power control, there   */
 186 /* is nothing to do in these functions and chk_power always returns 1.   */
 187
 188 static
 189 void power_on(BYTE drv)
 190 {
 191         //debug("*** enter power_on()\n");
 192
 193         if (drv == 0) {
 194 #ifdef SD_PWR_0
 195                 SD_PWR_0 = 0;           /* Drives PWR pin high */
 196 #endif
 197
 198         } else {
 199 #ifdef SD_PWR_1
 200                 SD_PWR_1 = 0;           /* Drives PWR pin high */
 201 #endif
 202         }
 203 #if defined SD_PWR_0 || defined SD_PWR_1
 204                 for (uint32_t to = get_timer(0); get_timer(to) < 30;)
 205                         ; /* Wait for 30ms */
 206 #endif
 207         //debug("***  exit power_on()\n");
 208 }
 209
 210 static
 211 void power_off(BYTE drv)
 212 {
 213         //debug("*** enter power_off()\n");
 214         select(drv);            /* Wait for card ready */
 215         deselect(drv);
 216
 217         if (drv == 0) {
 218 #ifdef SD_PWR_0
 219                 SD_PWR_0 = 1;           /* Socket power OFF */
 220 #endif
 221         } else {
 222 #ifdef SD_PWR_1
 223                 SD_PWR_1 = 1;           /* Socket power OFF */
 224 #endif
 225         }
 226         socket[drv].stat |= STA_NOINIT;
 227         //debug("***  exit power_off()\n");
 228 }
 229
 230 #if 0
 231 static
 232 int chk_power(BYTE drv) /* Socket power state: 0=off, 1=on */
 233 {
 234         if (drv == 0) {
 235 #ifdef SD_PWR_0
 236                 return SD_PWR_0 == 0;
 237 #else
 238                 return 1;
 239 #endif /* SD_PWR_PIN */
 240         } else {
 241 #ifdef SD_PWR_1
 242                 return SD_PWR_1 == 0;
 243 #else
 244                 return 1;
 245 #endif /* SD_PWR_PIN */
 246         }
 247 }
 248 #endif
 249
 250 /*-----------------------------------------------------------------------*/
 251 /* Receive a data packet from MMC                                        */
 252 /*-----------------------------------------------------------------------*/
 253
 254 static
 255 int rcvr_datablock (
 256         BYTE *buff,                     /* Data buffer to store received data */
 257 UINT btr /* Byte count (must be multiple of 4) */
 258 ) {
 259         BYTE token, tmp;
 260         uint32_t to = get_timer(0);
 261
 262         /* Wait for data packet in timeout of 200ms */
 263         do {
 264                 token = spi_rcvr();
 265         } while ((token == 0xFF) && get_timer(to) < 200);
 266         if(token != 0xFE) return 0;             /* If not valid data token, retutn with error */
 267
 268         tmp = spi_rcvr(); /* shift in first byte */
 269         spi_write(0xff); /* start shift in next byte */
 270         while (--btr) {
 271                 *buff++ = tmp;
 272                 asm volatile (""::"r"(buff), "r"(btr));
 273                 spi_wait();
 274                 tmp = SPDR;
 275                 spi_write(0xff);
 276         }
 277         *buff = tmp; /* store last byte in buffer while SPI module shifts in crc part1 */
 278         spi_wait();
 279         spi_rcvr(); /* second crc */
 280
 281         return 1; /* Return with success */
 282 }
 283
 284 /*-----------------------------------------------------------------------*/
 285 /* Send a data packet to MMC                                             */
 286 /*-----------------------------------------------------------------------*/
 287
 288 #if     _USE_WRITE
 289 static
 290 int xmit_datablock (
 291                 const BYTE *buff, /* 512 byte data block to be transmitted */
 292                 BYTE token /* Data/Stop token */
 293 )
 294 {
 295         BYTE resp, tmp;
 296         UINT btr;
 297
 298         if (!wait_ready()) return 0;
 299
 300         spi_write(token); /* Xmit data token */
 301         if (token != 0xFD) { /* Is data token */
 302                 btr = 512;
 303                 do {
 304                         tmp = *buff++;
 305                         spi_wait();
 306                         spi_write(tmp);
 307                 }while (--btr);
 308                 spi_wait();
 309                 spi_xmit(0xff); /* CRC (Dummy) */
 310                 spi_xmit(0xff);
 311                 resp = spi_rcvr(); /* Reveive data response */
 312                 return ((resp & 0x1F) != 0x05) ? 0 : 1; /* If not accepted, return with error */
 313         }
 314
 315         spi_wait();
 316         return 1;
 317 }
 318 #endif /* _USE_WRITE */
 319
 320 /*-----------------------------------------------------------------------*/
 321 /* Send a command packet to MMC                                          */
 322 /*-----------------------------------------------------------------------*/
 323
 324 static
 325 BYTE send_cmd (         /* Returns R1 resp (bit7==1:Send failed) */
 326         BYTE drv,       /* Physical drive nmuber (0) */
 327         BYTE cmd,       /* Command index */
 328         DWORD arg       /* Argument */
 329 ) {
 330         union {
 331                 DWORD as32;
 332                 BYTE as8[4];
 333         } argtmp;
 334         BYTE n, res;
 335
 336         //debug("*** send_cmd( %.2x )\n", cmd);
 337
 338         if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */
 339                 cmd &= 0x7F;
 340                 res = send_cmd(drv, CMD55, 0);
 341                 if (res > 1)
 342                         return res;
 343         }
 344
 345         /* Select the card and wait for ready except to stop multiple block read */
 346         if (cmd != CMD12) {
 347                 deselect(drv);
 348                 if (!select(drv))
 349                         return 0xFF;
 350         }
 351
 352         /* Send command packet */
 353         spi_xmit(0x40 | cmd); /* Start + Command index */
 354         argtmp.as32 = arg;
 355         spi_xmit(argtmp.as8[3]); /* Argument[31..24] */
 356         spi_xmit(argtmp.as8[2]); /* Argument[23..16] */
 357         spi_xmit(argtmp.as8[1]); /* Argument[15..8] */
 358         spi_xmit(argtmp.as8[0]); /* Argument[7..0] */
 359
 360         n = 0x01; /* Dummy CRC + Stop */
 361         if (cmd == CMD0)
 362                 n = 0x95; /* Valid CRC for CMD0(0) */
 363         if (cmd == CMD8)
 364                 n = 0x87; /* Valid CRC for CMD8(0x1AA) */
 365         spi_xmit(n);
 366
 367         /* Receive command response */
 368         if (cmd == CMD12)
 369                 spi_rcvr(); /* Skip a stuff byte when stop reading */
 370         n = 10; /* Wait for a valid response in timeout of 10 attempts */
 371         do
 372                 res = spi_rcvr();
 373         while ((res & 0x80) && --n);
 374
 375         return res; /* Return with the response value */
 376 }
 377
 378 /*--------------------------------------------------------------------------
 379
 380  Public Functions
 381
 382  ---------------------------------------------------------------------------*/
 383
 384 void setup_mmc(void)
 385 {
 386 #ifdef SD_PWR_0
 387                 SD_PWR_1 = 1;           /* Drives PWR pin low */
 388                 SD_PWR_0_DDR = 1;       /* Turns on PWR pin as output */
 389 #endif
 390 #ifdef SD_WP_0
 391                 SD_WP_0_DDR = 0;
 392                 SD_WP_0 = 1;            /* Pullup */
 393 #endif
 394
 395 #ifdef SD_PWR_1
 396                 SD_PWR_1 = 1;           /* Drives PWR pin low */
 397                 SD_PWR_1_DDR = 1;       /* Turns on PWR pin as output */
 398 #endif
 399 #ifdef SD_WP_1
 400                 SD_WP_1_DDR = 0;
 401                 SD_WP_1 = 1;            /* Pullup */
 402 #endif
 403
 404         /* SPI as master */
 405         PRR0 &= ~_BV(PRSPI);
 406         SPI_DDR = (SPI_DDR & ~(_BV(SPI_MISO) | _BV(SPI_SS)))
 407                         | _BV(SPI_MOSI) | _BV(SPI_SCK);
 408         SPI_PORT = SPI_PORT & ~(_BV(SPI_MOSI) | _BV(SPI_SCK));
 409
 410 #if defined SD_CD_0
 411         SD_CD_0_DDR = 0;
 412         SD_CD_0 = 1;
 413 #elif defined SD_CS_0_IN
 414         SD_CS_0_DDR = 0;
 415         SD_CS_0 = 0;
 416 #else
 417         SD_CS_0_DDR = 1;
 418         SD_CS_0 = 1;
 419 #endif
 420
 421 #if defined SD_CD_1
 422         SD_CD_1_DDR = 0;
 423         SD_CD_1 = 1;
 424 #elif defined SD_CS_1_IN
 425         SD_CS_1_DDR = 0;
 426         SD_CS_1 = 0;
 427 #else
 428         SD_CS_1_DDR = 1;
 429         SD_CS_1 = 1;
 430 #endif
 431 }
 432
 433 /*-----------------------------------------------------------------------*/
 434 /* Initialize Disk Drive                                                 */
 435 /*-----------------------------------------------------------------------*/
 436
 437 #define MMC_INIT_TO 1000        /* 1s */
 438
 439 DSTATUS disk_initialize (
 440         BYTE drv                /* Physical drive nmuber (0) */
 441 )
 442 {
 443         BYTE n, cmd, ty, ocr[4];
 444
 445         if (drv >= MAX_DRV)
 446                 return STA_NOINIT; /* Supports only single drive */
 447         if (socket[drv].stat & STA_NODISK)
 448                 return socket[drv].stat; /* No card in the socket */
 449
 450         power_on(drv); /* Force socket power on */
 451         socket[drv].stat &= ~STA_FAST;
 452         SPI_CLK_SLOW();
 453         for (n = 10; n; n--)
 454                 spi_rcvr(); /* 80 dummy clocks */
 455
 456         ty = 0;
 457         if (send_cmd(drv, CMD0, 0) == 1) { /* Enter Idle state */
 458                 /* Init timeout timer */
 459                 uint32_t timer = get_timer(0);
 460
 461                 if (send_cmd(drv, CMD8, 0x1AA) == 1) {  /* SDv2? */
 462                         /* Get trailing return value of R7 resp */
 463                         for (n = 0; n < 4; n++)
 464                                 ocr[n] = spi_rcvr();
 465                         if (ocr[2] == 0x01 && ocr[3] == 0xAA) {
 466                                 /* The card can work at vdd range of 2.7-3.6V */
 467                                 while (get_timer(timer) < MMC_INIT_TO
 468                                         && send_cmd(drv, ACMD41, 1UL << 30))
 469                                         ; /* Wait for leaving idle state (ACMD41 with HCS bit) */
 470                                 if (get_timer(timer) < MMC_INIT_TO && send_cmd(drv, CMD58, 0) == 0) {
 471                                         /* Check CCS bit in the OCR */
 472                                         for (n = 0; n < 4; n++)
 473                                                 ocr[n] = spi_rcvr();
 474                                         ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;      /* SDv2 */
 475                                 }
 476                         }
 477                 } else {                                                        /* SDv1 or MMCv3 */
 478                         if (send_cmd(drv, ACMD41, 0) <= 1) {
 479                                 ty = CT_SD1; cmd = ACMD41;      /* SDv1 */
 480                         } else {
 481                                 ty = CT_MMC; cmd = CMD1;        /* MMCv3 */
 482                         }
 483
 484                         /* Wait for leaving idle state */
 485                         while (get_timer(timer) < MMC_INIT_TO && send_cmd(drv, cmd, 0))
 486                                 ;
 487
 488                         /* Set R/W block length to 512 */
 489                         if (!(get_timer(timer) < MMC_INIT_TO) || send_cmd(drv, CMD16, 512) != 0)
 490                                 ty = 0;
 491                 }
 492         }
 493         socket[drv].CardType = ty;
 494         deselect(drv);
 495
 496         if (ty) { /* Initialization succeded */
 497                 /* Clear STA_NOINIT */
 498                 socket[drv].stat = (socket[drv].stat & ~STA_NOINIT) | STA_FAST;
 499         } else { /* Initialization failed */
 500                 power_off(drv);
 501         }
 502
 503         return socket[drv].stat;
 504 }
 505
 506 /*-----------------------------------------------------------------------*/
 507 /* Get Disk Status                                                       */
 508 /*-----------------------------------------------------------------------*/
 509
 510 DSTATUS disk_status (
 511         BYTE drv        /* Physical drive nmuber (0) */
 512 )
 513 {
 514         if (drv >= MAX_DRV)
 515                 return STA_NOINIT;
 516         return socket[drv].stat;
 517 }
 518
 519 /*-----------------------------------------------------------------------*/
 520 /* Read Sector(s)                                                        */
 521 /*-----------------------------------------------------------------------*/
 522
 523 DRESULT disk_read (
 524         BYTE drv,       /* Physical drive nmuber (0) */
 525         BYTE *buff,     /* Pointer to the data buffer to store read data */
 526         DWORD sector,   /* Start sector number (LBA) */
 527         UINT count      /* Sector count (1..255) */
 528 )
 529 {
 530         BYTE cmd;
 531
 532         if (drv >= MAX_DRV || !count)
 533                 return RES_PARERR;
 534         if (socket[drv].stat & STA_NOINIT)
 535                 return RES_NOTRDY;
 536
 537         /* Convert to byte address if needed */
 538         if (!(socket[drv].CardType & CT_BLOCK))
 539                 sector *= 512;
 540
 541         /*  READ_MULTIPLE_BLOCK : READ_SINGLE_BLOCK */
 542         cmd = count > 1 ? CMD18 : CMD17;
 543         if (send_cmd(drv, cmd, sector) == 0) {
 544                 do {
 545                         if (!rcvr_datablock(buff, 512))
 546                                 break;
 547                         buff += 512;
 548                 } while (--count);
 549                 if (cmd == CMD18)
 550                         send_cmd(drv, CMD12, 0);        /* STOP_TRANSMISSION */
 551         }
 552         deselect(drv);
 553
 554         return count ? RES_ERROR : RES_OK;
 555 }
 556
 557 /*-----------------------------------------------------------------------*/
 558 /* Write Sector(s)                                                       */
 559 /*-----------------------------------------------------------------------*/
 560
 561 #if _USE_WRITE
 562 DRESULT disk_write (
 563         BYTE drv,       /* Physical drive nmuber (0) */
 564         const BYTE *buff, /* Pointer to the data to be written */
 565         DWORD sector,   /* Start sector number (LBA) */
 566         UINT count      /* Sector count (1..255) */
 567 )
 568 {
 569         if (drv >= MAX_DRV || !count)
 570                 return RES_PARERR;
 571         if (socket[drv].stat & STA_NOINIT)
 572                 return RES_NOTRDY;
 573         if (socket[drv].stat & STA_PROTECT)
 574                 return RES_WRPRT;
 575
 576         /* Convert to byte address if needed */
 577         if (!(socket[drv].CardType & CT_BLOCK))
 578                 sector *= 512;
 579
 580         if (count == 1) {
 581                 /* Single block write */
 582                 if ((send_cmd(drv, CMD24, sector) == 0) /* WRITE_BLOCK */
 583                                 && xmit_datablock(buff, 0xFE))
 584                 count = 0;
 585         } else {
 586                 /* Multiple block write */
 587                 if (socket[drv].CardType & CT_SDC)
 588                         send_cmd(drv, ACMD23, count);
 589                 if (send_cmd(drv, CMD25, sector) == 0) {
 590                         /* WRITE_MULTIPLE_BLOCK */
 591                         do {
 592                                 if (!xmit_datablock(buff, 0xFC))
 593                                         break;
 594                                 buff += 512;
 595                         } while (--count);
 596                         if (!xmit_datablock(0, 0xFD)) /* STOP_TRAN token */
 597                                 count = 1;
 598                 }
 599         }
 600         deselect(drv);
 601
 602         return count ? RES_ERROR : RES_OK;
 603 }
 604 #endif /* _USE_WRITE */
 605
 606 /*-----------------------------------------------------------------------*/
 607 /* Miscellaneous Functions                                               */
 608 /*-----------------------------------------------------------------------*/
 609
 610 #if _USE_IOCTL
 611 DRESULT disk_ioctl (
 612         BYTE drv,               /* Physical drive nmuber (0) */
 613         BYTE cmd,               /* Control code */
 614         void *buff              /* Buffer to send/receive control data */
 615 )
 616 {
 617         DRESULT res;
 618         BYTE n, csd[16], *ptr = buff;
 619         DWORD csize;
 620
 621         if (drv >= MAX_DRV)
 622                 return RES_PARERR;
 623
 624         res = RES_ERROR;
 625
 626         if (socket[drv].stat & STA_NOINIT)
 627                 return RES_NOTRDY;
 628
 629         /* TODO: SPI clock? */
 630
 631         switch (cmd) {
 632         case CTRL_SYNC :                /* Make sure that no pending write process. Do not remove this or written sector might not left updated. */
 633                 if (select(drv))
 634                         res = RES_OK;
 635                 break;
 636
 637         case GET_SECTOR_COUNT: /* Get number of sectors on the disk (DWORD) */
 638                 if ((send_cmd(drv, CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
 639                         if ((csd[0] >> 6) == 1) {       /* SDC ver 2.00 */
 640                                 csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
 641                                 *(DWORD*)buff = csize << 10;
 642                         } else {                                        /* SDC ver 1.XX or MMC*/
 643                                 n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
 644                                 csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
 645                                 *(DWORD*)buff = csize << (n - 9);
 646                         }
 647                         res = RES_OK;
 648                 }
 649                 break;
 650
 651         case GET_BLOCK_SIZE:    /* Get erase block size in unit of sector (DWORD) */
 652                 if (socket[drv].CardType & CT_SD2) {    /* SDv2? */
 653                         if (send_cmd(drv, ACMD13, 0) == 0) { /* Read SD status */
 654                                 spi_rcvr();
 655                                 if (rcvr_datablock(csd, 16)) { /* Read partial block */
 656                                         for (n = 64 - 16; n; n--)
 657                                                 spi_rcvr(); /* Purge trailing data */
 658                                         *(DWORD*) buff = 16UL << (csd[10] >> 4);
 659                                         res = RES_OK;
 660                                 }
 661                         }
 662                 } else {                                        /* SDv1 or MMCv3 */
 663                         if ((send_cmd(drv, CMD9, 0) == 0) && rcvr_datablock(csd, 16)) { /* Read CSD */
 664                                 if (socket[drv].CardType & CT_SD1) {    /* SDv1 */
 665                                         *(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
 666                                 } else {                                        /* MMCv3 */
 667                                         *(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
 668                                 }
 669                                 res = RES_OK;
 670                         }
 671                 }
 672                 break;
 673
 674         /* Following commands are never used by FatFs module */
 675
 676         case MMC_GET_TYPE:              /* Get card type flags (1 byte) */
 677                 *ptr = socket[drv].CardType;
 678                 res = RES_OK;
 679                 break;
 680
 681         case MMC_GET_CSD: /* Receive CSD as a data block (16 bytes) */
 682                 if (send_cmd(drv, CMD9, 0) == 0 /* READ_CSD */
 683                 && rcvr_datablock(ptr, 16))
 684                         res = RES_OK;
 685                 break;
 686
 687         case MMC_GET_CID: /* Receive CID as a data block (16 bytes) */
 688                 if (send_cmd(drv, CMD10, 0) == 0 /* READ_CID */
 689                 && rcvr_datablock(ptr, 16))
 690                         res = RES_OK;
 691                 break;
 692
 693         case MMC_GET_OCR: /* Receive OCR as an R3 resp (4 bytes) */
 694                 if (send_cmd(drv, CMD58, 0) == 0) { /* READ_OCR */
 695                         for (n = 4; n; n--)
 696                                 *ptr++ = spi_rcvr();
 697                         res = RES_OK;
 698                 }
 699                 break;
 700
 701         case MMC_GET_SDSTAT: /* Receive SD status as a data block (64 bytes) */
 702                 if (send_cmd(drv, ACMD13, 0) == 0) { /* SD_STATUS */
 703                         spi_rcvr();
 704                         if (rcvr_datablock(ptr, 64))
 705                                 res = RES_OK;
 706                 }
 707                 break;
 708
 709         case CTRL_POWER_OFF :   /* Power off */
 710                 power_off(drv);
 711                 socket[drv].stat |= STA_NOINIT;
 712                 res = RES_OK;
 713                 break;
 714
 715         default:
 716                 res = RES_PARERR;
 717         }
 718
 719         deselect(drv);
 720
 721         return res;
 722 }
 723 #endif /* _USE_IOCTL */
 724
 725 /*-----------------------------------------------------------------------*/
 726 /* Device Timer Interrupt Procedure  (Platform dependent)                */
 727 /*-----------------------------------------------------------------------*/
 728 /* This function must be called in period of 10ms                        */
 729
 730 void disk_timerproc (void)
 731 {
 732         BYTE s;
 733
 734         s = socket[0].stat;
 735 #ifdef SD_WP_0
 736         if (SD_WP_0_IN == 0)                    /* Write protected */
 737                 s |= STA_PROTECT;
 738         else                                                    /* Write enabled */
 739                 s &= ~STA_PROTECT;
 740 #endif
 741
 742 #if defined SD_CD_0
 743         if (SD_CD_0_IN == 0)                    /* Card inserted */
 744                 s &= ~STA_NODISK;
 745         else                                                    /* Socket empty */
 746                 s |= (STA_NODISK | STA_NOINIT);
 747 #elif defined SD_CS_0_IN
 748         if (SD_CS_0_DDR == 0) {
 749                 if (SD_CS_0_IN == 1)            /* Card inserted */
 750                         s &= ~STA_NODISK;
 751                 else                                            /* Socket empty */
 752                         s |= (STA_NODISK | STA_NOINIT);
 753         }
 754 #endif
 755         socket[0].stat = s;                             /* Update MMC status */
 756
 757         s = socket[1].stat;
 758 #ifdef SD_WP_1
 759         if (SD_WP_1_IN == 0)                    /* Write protected */
 760                 s |= STA_PROTECT;
 761         else                                                    /* Write enabled */
 762                 s &= ~STA_PROTECT;
 763 #endif
 764
 765 #if defined SD_CD_1
 766         if (SD_CD_1_IN == 0)                    /* Card inserted */
 767                 s &= ~STA_NODISK;
 768         else                                                    /* Socket empty */
 769                 s |= (STA_NODISK | STA_NOINIT);
 770 #elif defined SD_CS_1_IN
 771         if (SD_CS_1_DDR == 0) {
 772                 if (SD_CS_1_IN == 1)            /* Card inserted */
 773                         s &= ~STA_NODISK;
 774                 else                                            /* Socket empty */
 775                         s |= (STA_NODISK | STA_NOINIT);
 776         }
 777 #endif
 778         socket[1].stat = s;                     /* Update MMC status */
 779 }