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cloudbase.mooo.com Git - z180-stamp.git/blob - 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 /*-----------------------------------------------------------------------*/
17 /* Port Controls (Platform dependent) */
18 /* SD card socket connections */
20 /* TODO: config.h cofig macros */
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,)
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,)
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)
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)
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)
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)
48 #define SPI_CLK_SLOW() SPISetMMCInitClock() /* Set slow clock (100k-400k) */
49 #define SPI_CLK_FAST() SPISetFastClock() /* Set fast clock (depends on the CSD) */
51 /*--------------------------------------------------------------------------
52 Definitions for MMC/SDC command
53 ---------------------------------------------------------------------------*/
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 */
74 /*--------------------------------------------------------------------------
76 Module Private Functions
78 ---------------------------------------------------------------------------*/
80 struct sdsock_stat_s
{
81 volatile DSTATUS stat
; /* Disk/socket status */
82 BYTE CardType
; /* Card type flags */
92 /*-----------------------------------------------------------------------*/
93 /* Wait for card ready */
94 /*-----------------------------------------------------------------------*/
97 int wait_ready (void) /* 1:OK, 0:Timeout */
99 uint32_t to
= get_timer(0);
101 /* Wait for ready in timeout of 500ms */
103 if (spi_rcvr() == 0xFF) {
106 } while (get_timer(to
) < 500);
111 /*-----------------------------------------------------------------------*/
112 /* Deselect the card and release SPI bus */
113 /*-----------------------------------------------------------------------*/
116 void deselect(BYTE drv
)
118 //debug("*** enter deselect()\n");
125 /* Dummy clock (TODO: force DO hi-z for multiple slave SPI) */
126 if (socket
[drv
].stat
& STA_FAST
)
144 //debug("*** exit deselect()\n");
147 /*-----------------------------------------------------------------------*/
148 /* Select the card and wait for ready */
149 /*-----------------------------------------------------------------------*/
152 int select(BYTE drv
) /* 1:Successful, 0:Timeout */
154 //debug("*** enter select()\n");
169 if (socket
[drv
].stat
& STA_FAST
)
174 /* Dummy clock (force DO enabled) */
178 //debug("*** exit select() == 1\n");
182 //debug("*** exit select() == 0\n");
184 return 0; /* Timeout */
187 /*-----------------------------------------------------------------------*/
188 /* Power Control (Platform dependent) */
189 /*-----------------------------------------------------------------------*/
190 /* When the target system does not support socket power control, there */
191 /* is nothing to do in these functions and chk_power always returns 1. */
194 void power_on(BYTE drv
)
196 //debug("*** enter power_on()\n");
200 SD_PWR_0
= 0; /* Drives PWR pin high */
205 SD_PWR_1
= 0; /* Drives PWR pin high */
208 #if defined SD_PWR_0 || defined SD_PWR_1
209 for (uint32_t to
= get_timer(0); get_timer(to
) < 30;)
210 ; /* Wait for 30ms */
212 //debug("*** exit power_on()\n");
216 void power_off(BYTE drv
)
218 //debug("*** enter power_off()\n");
219 select(drv
); /* Wait for card ready */
224 SD_PWR_0
= 1; /* Socket power OFF */
228 SD_PWR_1
= 1; /* Socket power OFF */
231 socket
[drv
].stat
|= STA_NOINIT
;
232 //debug("*** exit power_off()\n");
237 int chk_power(BYTE drv
) /* Socket power state: 0=off, 1=on */
241 return SD_PWR_0
== 0;
244 #endif /* SD_PWR_PIN */
247 return SD_PWR_1
== 0;
250 #endif /* SD_PWR_PIN */
255 /*-----------------------------------------------------------------------*/
256 /* Receive a data packet from MMC */
257 /*-----------------------------------------------------------------------*/
261 BYTE
*buff
, /* Data buffer to store received data */
262 UINT btr
/* Byte count (must be multiple of 4) */
265 uint32_t to
= get_timer(0);
267 /* Wait for data packet in timeout of 200ms */
270 } while ((token
== 0xFF) && get_timer(to
) < 200);
271 if(token
!= 0xFE) return 0; /* If not valid data token, retutn with error */
273 tmp
= spi_rcvr(); /* shift in first byte */
274 spi_write(0xff); /* start shift in next byte */
277 asm volatile (""::"r"(buff
), "r"(btr
));
282 *buff
= tmp
; /* store last byte in buffer while SPI module shifts in crc part1 */
284 spi_rcvr(); /* second crc */
286 return 1; /* Return with success */
289 /*-----------------------------------------------------------------------*/
290 /* Send a data packet to MMC */
291 /*-----------------------------------------------------------------------*/
296 const BYTE
*buff
, /* 512 byte data block to be transmitted */
297 BYTE token
/* Data/Stop token */
303 if (!wait_ready()) return 0;
305 spi_write(token
); /* Xmit data token */
306 if (token
!= 0xFD) { /* Is data token */
314 spi_xmit(0xff); /* CRC (Dummy) */
316 resp
= spi_rcvr(); /* Reveive data response */
317 return ((resp
& 0x1F) != 0x05) ? 0 : 1; /* If not accepted, return with error */
323 #endif /* _USE_WRITE */
325 /*-----------------------------------------------------------------------*/
326 /* Send a command packet to MMC */
327 /*-----------------------------------------------------------------------*/
330 BYTE
send_cmd ( /* Returns R1 resp (bit7==1:Send failed) */
331 BYTE drv
, /* Physical drive nmuber (0) */
332 BYTE cmd
, /* Command index */
333 DWORD arg
/* Argument */
341 //debug("*** send_cmd( %.2x )\n", cmd);
343 if (cmd
& 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */
345 res
= send_cmd(drv
, CMD55
, 0);
350 /* Select the card and wait for ready except to stop multiple block read */
357 /* Send command packet */
358 spi_xmit(0x40 | cmd
); /* Start + Command index */
360 spi_xmit(argtmp
.as8
[3]); /* Argument[31..24] */
361 spi_xmit(argtmp
.as8
[2]); /* Argument[23..16] */
362 spi_xmit(argtmp
.as8
[1]); /* Argument[15..8] */
363 spi_xmit(argtmp
.as8
[0]); /* Argument[7..0] */
365 n
= 0x01; /* Dummy CRC + Stop */
367 n
= 0x95; /* Valid CRC for CMD0(0) */
369 n
= 0x87; /* Valid CRC for CMD8(0x1AA) */
372 /* Receive command response */
374 spi_rcvr(); /* Skip a stuff byte when stop reading */
375 n
= 10; /* Wait for a valid response in timeout of 10 attempts */
378 while ((res
& 0x80) && --n
);
380 return res
; /* Return with the response value */
383 /*--------------------------------------------------------------------------
387 ---------------------------------------------------------------------------*/
392 SD_PWR_1
= 1; /* Drives PWR pin low */
393 SD_PWR_0_DDR
= 1; /* Turns on PWR pin as output */
397 SD_WP_0
= 1; /* Pullup */
401 SD_PWR_1
= 1; /* Drives PWR pin low */
402 SD_PWR_1_DDR
= 1; /* Turns on PWR pin as output */
406 SD_WP_1
= 1; /* Pullup */
411 SPI_DDR
= (SPI_DDR
& ~(_BV(SPI_MISO
) | _BV(SPI_SS
)))
412 | _BV(SPI_MOSI
) | _BV(SPI_SCK
);
413 SPI_PORT
= SPI_PORT
& ~(_BV(SPI_MOSI
) | _BV(SPI_SCK
));
418 #elif defined SD_CS_0_IN
429 #elif defined SD_CS_1_IN
438 /*-----------------------------------------------------------------------*/
439 /* Initialize Disk Drive */
440 /*-----------------------------------------------------------------------*/
442 #define MMC_INIT_TO 1000 /* 1s */
444 DSTATUS
disk_initialize (
445 BYTE drv
/* Physical drive nmuber (0) */
448 BYTE n
, cmd
, ty
, ocr
[4];
451 return STA_NOINIT
; /* Supports only single drive */
452 if (socket
[drv
].stat
& STA_NODISK
)
453 return socket
[drv
].stat
; /* No card in the socket */
455 power_on(drv
); /* Force socket power on */
456 socket
[drv
].stat
&= ~STA_FAST
;
459 spi_rcvr(); /* 80 dummy clocks */
462 if (send_cmd(drv
, CMD0
, 0) == 1) { /* Enter Idle state */
463 /* Init timeout timer */
464 uint32_t timer
= get_timer(0);
466 if (send_cmd(drv
, CMD8
, 0x1AA) == 1) { /* SDv2? */
467 /* Get trailing return value of R7 resp */
468 for (n
= 0; n
< 4; n
++)
470 if (ocr
[2] == 0x01 && ocr
[3] == 0xAA) {
471 /* The card can work at vdd range of 2.7-3.6V */
472 while (get_timer(timer
) < MMC_INIT_TO
473 && send_cmd(drv
, ACMD41
, 1UL << 30))
474 ; /* Wait for leaving idle state (ACMD41 with HCS bit) */
475 if (get_timer(timer
) < MMC_INIT_TO
&& send_cmd(drv
, CMD58
, 0) == 0) {
476 /* Check CCS bit in the OCR */
477 for (n
= 0; n
< 4; n
++)
479 ty
= (ocr
[0] & 0x40) ? CT_SD2
| CT_BLOCK
: CT_SD2
; /* SDv2 */
482 } else { /* SDv1 or MMCv3 */
483 if (send_cmd(drv
, ACMD41
, 0) <= 1) {
484 ty
= CT_SD1
; cmd
= ACMD41
; /* SDv1 */
486 ty
= CT_MMC
; cmd
= CMD1
; /* MMCv3 */
489 /* Wait for leaving idle state */
490 while (get_timer(timer
) < MMC_INIT_TO
&& send_cmd(drv
, cmd
, 0))
493 /* Set R/W block length to 512 */
494 if (!(get_timer(timer
) < MMC_INIT_TO
) || send_cmd(drv
, CMD16
, 512) != 0)
498 socket
[drv
].CardType
= ty
;
501 if (ty
) { /* Initialization succeded */
502 /* Clear STA_NOINIT */
503 socket
[drv
].stat
= (socket
[drv
].stat
& ~STA_NOINIT
) | STA_FAST
;
504 } else { /* Initialization failed */
508 return socket
[drv
].stat
;
511 /*-----------------------------------------------------------------------*/
512 /* Get Disk Status */
513 /*-----------------------------------------------------------------------*/
515 DSTATUS
disk_status (
516 BYTE drv
/* Physical drive nmuber (0) */
521 return socket
[drv
].stat
;
524 /*-----------------------------------------------------------------------*/
526 /*-----------------------------------------------------------------------*/
529 BYTE drv
, /* Physical drive nmuber (0) */
530 BYTE
*buff
, /* Pointer to the data buffer to store read data */
531 DWORD sector
, /* Start sector number (LBA) */
532 UINT count
/* Sector count (1..255) */
537 if (drv
>= MAX_DRV
|| !count
)
539 if (socket
[drv
].stat
& STA_NOINIT
)
542 /* Convert to byte address if needed */
543 if (!(socket
[drv
].CardType
& CT_BLOCK
))
546 /* READ_MULTIPLE_BLOCK : READ_SINGLE_BLOCK */
547 cmd
= count
> 1 ? CMD18
: CMD17
;
548 if (send_cmd(drv
, cmd
, sector
) == 0) {
550 if (!rcvr_datablock(buff
, 512))
555 send_cmd(drv
, CMD12
, 0); /* STOP_TRANSMISSION */
559 return count
? RES_ERROR
: RES_OK
;
562 /*-----------------------------------------------------------------------*/
563 /* Write Sector(s) */
564 /*-----------------------------------------------------------------------*/
568 BYTE drv
, /* Physical drive nmuber (0) */
569 const BYTE
*buff
, /* Pointer to the data to be written */
570 DWORD sector
, /* Start sector number (LBA) */
571 UINT count
/* Sector count (1..255) */
574 if (drv
>= MAX_DRV
|| !count
)
576 if (socket
[drv
].stat
& STA_NOINIT
)
578 if (socket
[drv
].stat
& STA_PROTECT
)
581 /* Convert to byte address if needed */
582 if (!(socket
[drv
].CardType
& CT_BLOCK
))
586 /* Single block write */
587 if ((send_cmd(drv
, CMD24
, sector
) == 0) /* WRITE_BLOCK */
588 && xmit_datablock(buff
, 0xFE))
591 /* Multiple block write */
592 if (socket
[drv
].CardType
& CT_SDC
)
593 send_cmd(drv
, ACMD23
, count
);
594 if (send_cmd(drv
, CMD25
, sector
) == 0) {
595 /* WRITE_MULTIPLE_BLOCK */
597 if (!xmit_datablock(buff
, 0xFC))
601 if (!xmit_datablock(0, 0xFD)) /* STOP_TRAN token */
607 return count
? RES_ERROR
: RES_OK
;
609 #endif /* _USE_WRITE */
611 /*-----------------------------------------------------------------------*/
612 /* Miscellaneous Functions */
613 /*-----------------------------------------------------------------------*/
617 BYTE drv
, /* Physical drive nmuber (0) */
618 BYTE cmd
, /* Control code */
619 void *buff
/* Buffer to send/receive control data */
623 BYTE n
, csd
[16], *ptr
= buff
;
631 if (socket
[drv
].stat
& STA_NOINIT
)
634 /* TODO: SPI clock? */
637 case CTRL_SYNC
: /* Make sure that no pending write process. Do not remove this or written sector might not left updated. */
642 case GET_SECTOR_COUNT
: /* Get number of sectors on the disk (DWORD) */
643 if ((send_cmd(drv
, CMD9
, 0) == 0) && rcvr_datablock(csd
, 16)) {
644 if ((csd
[0] >> 6) == 1) { /* SDC ver 2.00 */
645 csize
= csd
[9] + ((WORD
)csd
[8] << 8) + ((DWORD
)(csd
[7] & 63) << 16) + 1;
646 *(DWORD
*)buff
= csize
<< 10;
647 } else { /* SDC ver 1.XX or MMC*/
648 n
= (csd
[5] & 15) + ((csd
[10] & 128) >> 7) + ((csd
[9] & 3) << 1) + 2;
649 csize
= (csd
[8] >> 6) + ((WORD
)csd
[7] << 2) + ((WORD
)(csd
[6] & 3) << 10) + 1;
650 *(DWORD
*)buff
= csize
<< (n
- 9);
656 case GET_BLOCK_SIZE
: /* Get erase block size in unit of sector (DWORD) */
657 if (socket
[drv
].CardType
& CT_SD2
) { /* SDv2? */
658 if (send_cmd(drv
, ACMD13
, 0) == 0) { /* Read SD status */
660 if (rcvr_datablock(csd
, 16)) { /* Read partial block */
661 for (n
= 64 - 16; n
; n
--)
662 spi_rcvr(); /* Purge trailing data */
663 *(DWORD
*) buff
= 16UL << (csd
[10] >> 4);
667 } else { /* SDv1 or MMCv3 */
668 if ((send_cmd(drv
, CMD9
, 0) == 0) && rcvr_datablock(csd
, 16)) { /* Read CSD */
669 if (socket
[drv
].CardType
& CT_SD1
) { /* SDv1 */
670 *(DWORD
*)buff
= (((csd
[10] & 63) << 1) + ((WORD
)(csd
[11] & 128) >> 7) + 1) << ((csd
[13] >> 6) - 1);
672 *(DWORD
*)buff
= ((WORD
)((csd
[10] & 124) >> 2) + 1) * (((csd
[11] & 3) << 3) + ((csd
[11] & 224) >> 5) + 1);
679 /* Following commands are never used by FatFs module */
681 case MMC_GET_TYPE
: /* Get card type flags (1 byte) */
682 *ptr
= socket
[drv
].CardType
;
686 case MMC_GET_CSD
: /* Receive CSD as a data block (16 bytes) */
687 if (send_cmd(drv
, CMD9
, 0) == 0 /* READ_CSD */
688 && rcvr_datablock(ptr
, 16))
692 case MMC_GET_CID
: /* Receive CID as a data block (16 bytes) */
693 if (send_cmd(drv
, CMD10
, 0) == 0 /* READ_CID */
694 && rcvr_datablock(ptr
, 16))
698 case MMC_GET_OCR
: /* Receive OCR as an R3 resp (4 bytes) */
699 if (send_cmd(drv
, CMD58
, 0) == 0) { /* READ_OCR */
706 case MMC_GET_SDSTAT
: /* Receive SD status as a data block (64 bytes) */
707 if (send_cmd(drv
, ACMD13
, 0) == 0) { /* SD_STATUS */
709 if (rcvr_datablock(ptr
, 64))
714 case CTRL_POWER_OFF
: /* Power off */
716 socket
[drv
].stat
|= STA_NOINIT
;
728 #endif /* _USE_IOCTL */
730 /*-----------------------------------------------------------------------*/
731 /* Device Timer Interrupt Procedure (Platform dependent) */
732 /*-----------------------------------------------------------------------*/
733 /* This function must be called in period of 10ms */
735 void disk_timerproc (void)
741 if (SD_WP_0_IN
== 0) /* Write protected */
743 else /* Write enabled */
748 if (SD_CD_0_IN
== 0) /* Card inserted */
750 else /* Socket empty */
751 s
|= (STA_NODISK
| STA_NOINIT
);
752 #elif defined SD_CS_0_IN
753 if (SD_CS_0_DDR
== 0) {
754 if (SD_CS_0_IN
== 1) /* Card inserted */
756 else /* Socket empty */
757 s
|= (STA_NODISK
| STA_NOINIT
);
760 socket
[0].stat
= s
; /* Update MMC status */
764 if (SD_WP_1_IN
== 0) /* Write protected */
766 else /* Write enabled */
771 if (SD_CD_1_IN
== 0) /* Card inserted */
773 else /* Socket empty */
774 s
|= (STA_NODISK
| STA_NOINIT
);
775 #elif defined SD_CS_1_IN
776 if (SD_CS_1_DDR
== 0) {
777 if (SD_CS_1_IN
== 1) /* Card inserted */
779 else /* Socket empty */
780 s
|= (STA_NODISK
| STA_NOINIT
);
783 socket
[1].stat
= s
; /* Update MMC status */