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further modified to adapt for Coldfire

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This commit is contained in:
Markus Fröschle
2012-12-04 14:27:57 +00:00
parent 9649036841
commit c536c1314b
1 changed files with 662 additions and 539 deletions
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731
SD_CARD/BaS_gcc/sources/mmcbb.c
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@@ -1,48 +1,64 @@
/*------------------------------------------------------------------------/ /*------------------------------------------------------------------------*/
/ Bitbanging MMCv3/SDv1/SDv2 (in SPI mode) control module /* Firebee: MMCv3/SDv1/SDv2 (SPI mode) control module */
/-------------------------------------------------------------------------/ /*------------------------------------------------------------------------*/
/ /*
/ Copyright (C) 2012, ChaN, all right reserved. / Copyright (C) 2011, ChaN, all right reserved.
/ Copyright (C) 2012, mfro, all rights reserved.
/ /
/ * This software is a free software and there is NO WARRANTY. / * This software is a free software and there is NO WARRANTY.
/ * No restriction on use. You can use, modify and redistribute it for / * No restriction on use. You can use, modify and redistribute it for
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
/ * Redistributions of source code must retain the above copyright notice. / * Redistributions of source code must retain the above copyright notice.
/ /
/--------------------------------------------------------------------------/
Features and Limitations:
* Very Easy to Port
It uses only 4 bit of GPIO port. No interrupt, no SPI port is used.
* Platform Independent
You need to modify only a few macros to control GPIO ports.
* Low Speed
The data transfer rate will be several times slower than hardware SPI.
/-------------------------------------------------------------------------*/ /-------------------------------------------------------------------------*/
#define SSP_CH 1 /* SSP channel to use (0:SSP0, 1:SSP1) */
#include "diskio.h" /* Common include file for FatFs and disk I/O layer */ #define CCLK 100000000UL /* cclk frequency [Hz] */
#define PCLK_SSP 50000000UL /* PCLK frequency for SSP [Hz] */
#define SCLK_FAST 25000000UL /* SCLK frequency under normal operation [Hz] */
#define SCLK_SLOW 400000UL /* SCLK frequency under initialization [Hz] */
#define INS (!(FIO2PIN1 & _BV(1))) /* Socket status (true:Inserted, false:Empty) */
#define WP 0 /* Card write protection (true:yes, false:no) */
#if SSP_CH == 0
#define SSPxDR SSP0DR
#define SSPxSR SSP0SR
#define SSPxCR0 SSP0CR0
#define SSPxCR1 SSP0CR1
#define SSPxCPSR SSP0CPSR
#define CS_LOW() {FIO0CLR2 = _BV(2);} /* Set P0.18 low */
#define CS_HIGH() {FIO0SET2 = _BV(2);} /* Set P0.18 high */
#define PCSSPx PCSSP0
#define PCLKSSPx PCLK_SSP0
#elif SSP_CH == 1
#define SSPxDR SSP1DR
#define SSPxSR SSP1SR
#define SSPxCR0 SSP1CR0
#define SSPxCR1 SSP1CR1
#define SSPxCPSR SSP1CPSR
#define CS_LOW() {FIO0CLR0 = _BV(6);} /* Set P0.6 low */
#define CS_HIGH() {FIO0SET0 = _BV(6);} /* Set P0.6 high */
#define PCSSPx PCSSP1
#define PCLKSSPx PCLK_SSP1
#endif
#if PCLK_SSP * 1 == CCLK
#define PCLKDIV_SSP PCLKDIV_1
#elif PCLK_SSP * 2 == CCLK
#define PCLKDIV_SSP PCLKDIV_2
#elif PCLK_SSP * 4 == CCLK
#define PCLKDIV_SSP PCLKDIV_4
#elif PCLK_SSP * 8 == CCLK
#define PCLKDIV_SSP PCLKDIV_8
#else
#error Invalid clock frequency.
#endif
/*-------------------------------------------------------------------------*/ #define FCLK_FAST() { SSPxCPSR = (PCLK_SSP / SCLK_FAST) & ~1; }
/* Platform dependent macros and functions needed to be modified */ #define FCLK_SLOW() { SSPxCPSR = (PCLK_SSP / SCLK_SLOW) & ~1; }
/*-------------------------------------------------------------------------*/
#include <sd_card.h> /* Include device specific declareation file here */
#define INIT_PORT() init_port() /* Initialize MMC control port (CS=H, CLK=L, DI=H, DO=in) */
#define DLY_US(n) wait(n) /* Delay n microseconds */
#define CS_H() PORT |= 0x01 /* Set MMC CS "high" */
#define CS_L() PORT &= 0xFE /* Set MMC CS "low" */
#define CK_H() PORT |= 0x02 /* Set MMC SCLK "high" */
#define CK_L() PORT &= 0xFD /* Set MMC SCLK "low" */
#define DI_H() PORT |= 0x04 /* Set MMC DI "high" */
#define DI_L() PORT &= 0xFB /* Set MMC DI "low" */
#define DO (PORT & 0x08) /* Test for MMC DO ('H':true, 'L':false) */
@@ -52,256 +68,280 @@
---------------------------------------------------------------------------*/ ---------------------------------------------------------------------------*/
/* MMC/SD command (SPI mode) */ #include "MCF5475.h"
#include "diskio.h"
/* MMC/SD command */
#define CMD0 (0) /* GO_IDLE_STATE */ #define CMD0 (0) /* GO_IDLE_STATE */
#define CMD1 (1) /* SEND_OP_COND */ #define CMD1 (1) /* SEND_OP_COND (MMC) */
#define ACMD41 (0x80+41) /* SEND_OP_COND (SDC) */ #define ACMD41 (0x80+41) /* SEND_OP_COND (SDC) */
#define CMD8 (8) /* SEND_IF_COND */ #define CMD8 (8) /* SEND_IF_COND */
#define CMD9 (9) /* SEND_CSD */ #define CMD9 (9) /* SEND_CSD */
#define CMD10 (10) /* SEND_CID */ #define CMD10 (10) /* SEND_CID */
#define CMD12 (12) /* STOP_TRANSMISSION */ #define CMD12 (12) /* STOP_TRANSMISSION */
#define CMD13 (13) /* SEND_STATUS */
#define ACMD13 (0x80+13) /* SD_STATUS (SDC) */ #define ACMD13 (0x80+13) /* SD_STATUS (SDC) */
#define CMD16 (16) /* SET_BLOCKLEN */ #define CMD16 (16) /* SET_BLOCKLEN */
#define CMD17 (17) /* READ_SINGLE_BLOCK */ #define CMD17 (17) /* READ_SINGLE_BLOCK */
#define CMD18 (18) /* READ_MULTIPLE_BLOCK */ #define CMD18 (18) /* READ_MULTIPLE_BLOCK */
#define CMD23 (23) /* SET_BLOCK_COUNT */ #define CMD23 (23) /* SET_BLOCK_COUNT (MMC) */
#define ACMD23 (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */ #define ACMD23 (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */
#define CMD24 (24) /* WRITE_BLOCK */ #define CMD24 (24) /* WRITE_BLOCK */
#define CMD25 (25) /* WRITE_MULTIPLE_BLOCK */ #define CMD25 (25) /* WRITE_MULTIPLE_BLOCK */
#define CMD41 (41) /* SEND_OP_COND (ACMD) */ #define CMD32 (32) /* ERASE_ER_BLK_START */
#define CMD33 (33) /* ERASE_ER_BLK_END */
#define CMD38 (38) /* ERASE */
#define CMD55 (55) /* APP_CMD */ #define CMD55 (55) /* APP_CMD */
#define CMD58 (58) /* READ_OCR */ #define CMD58 (58) /* READ_OCR */
/* Card type flags (CardType) */
#define CT_MMC 0x01 /* MMC ver 3 */
#define CT_SD1 0x02 /* SD ver 1 */
#define CT_SD2 0x04 /* SD ver 2 */
#define CT_SDC 0x06 /* SD */
#define CT_BLOCK 0x08 /* Block addressing */
static volatile
DSTATUS Stat = STA_NOINIT; /* Physical drive status */
static volatile
UINT Timer1, Timer2; /* 1kHz decrement timer stopped at zero (disk_timerproc()) */
static static
DSTATUS Stat = STA_NOINIT; /* Disk status */ BYTE CardType; /* Card type flags */
static
BYTE CardType; /* b0:MMC, b1:SDv1, b2:SDv2, b3:Block addressing */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Transmit bytes to the card (bitbanging) */ /* Send/Receive data to the MMC (Platform dependent) */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
static /* Exchange a byte */
void xmit_mmc ( static BYTE xchg_spi(BYTE byte)
const BYTE* buff, /* Data to be sent */
UINT bc /* Number of bytes to send */
)
{ {
do { * (volatile uint8_t *) (&MCF_DSPI_DTFR + 3) = byte;
spi_send_byte(*buff++);
} while (--bc); while (! (MCF_DSPI_DSR & MCF_DSPI_DSR_TCF)); /* wait until DSPI transfer complete */
MCF_DSPI_DSR = 0xffffffff; /* clear DSPI status register */
return * (volatile uint8_t *) (&MCF_DSPI_DRFR + 3);
}
/* Receive multiple byte
*
* buff: pointer to data buffer
* btr: number of bytes to receive (16, 64 or 512)
*/
static void rcvr_spi_multi(BYTE *buff, UINT count)
{
int i;
for (i = 0; i < count; i++)
*buff++ = xchg_spi(0xff);
}
#if _USE_WRITE
/* Send multiple byte
*
* buff: pointer to data
* btx: number of bytes to send
*/
static void xmit_spi_multi(const BYTE *buff, UINT btx)
{
UINT n = 512;
WORD d;
for (i = 0; i < btx; i++)
xchg_spi(*buff++);
}
#endif
static bool card_ready(void)
{
uint8_t d;
d = xchg_spi(0xff);
return (d != 0xff);
}
/*
* Wait for card ready
*
* wt: timeout in ms
* returns 1: ready, 0: timeout
*/
static int wait_ready (UINT wt)
{
return waitfor(card_ready, wt);
} }
/*-----------------------------------------------------------------------*/ /*
/* Receive bytes from the card (bitbanging) */ * Deselect card and release SPI
/*-----------------------------------------------------------------------*/ */
static
void rcvr_mmc (
BYTE *buff, /* Pointer to read buffer */
UINT bc /* Number of bytes to receive */
)
{
BYTE r;
DI_H(); /* Send 0xFF */
do {
r = 0; if (DO) r++; /* bit7 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit6 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit5 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit4 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit3 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit2 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit1 */
CK_H(); CK_L();
r <<= 1; if (DO) r++; /* bit0 */
CK_H(); CK_L();
*buff++ = r; /* Store a received byte */
} while (--bc);
}
/*-----------------------------------------------------------------------*/
/* Wait for card ready */
/*-----------------------------------------------------------------------*/
static
int wait_ready (void) /* 1:OK, 0:Timeout */
{
BYTE d;
UINT tmr;
for (tmr = 5000; tmr; tmr--) { /* Wait for ready in timeout of 500ms */
rcvr_mmc(&d, 1);
if (d == 0xFF) break;
DLY_US(100);
}
return tmr ? 1 : 0;
}
/*-----------------------------------------------------------------------*/
/* Deselect the card and release SPI bus */
/*-----------------------------------------------------------------------*/
static static
void deselect (void) void deselect (void)
{ {
BYTE d; CS_HIGH(); /* CS = H */
xchg_spi(0xFF); /* Dummy clock (force DO hi-z for multiple slave SPI) */
CS_H();
rcvr_mmc(&d, 1); /* Dummy clock (force DO hi-z for multiple slave SPI) */
} }
/*-----------------------------------------------------------------------*/ /*
/* Select the card and wait for ready */ * Select card and wait for ready
/*-----------------------------------------------------------------------*/ */
static static
int select (void) /* 1:OK, 0:Timeout */ int select (void) /* 1:OK, 0:Timeout */
{ {
BYTE d; CS_LOW();
xchg_spi(0xFF); /* Dummy clock (force DO enabled) */
CS_L(); if (wait_ready(500)) return 1; /* OK */
rcvr_mmc(&d, 1); /* Dummy clock (force DO enabled) */ deselect();
return 0; /* Timeout */
if (wait_ready()) return 1; /* OK */ }
/*
* Control SPI module (Platform dependent)
*/
static
void power_on (void) /* Enable SSP module and attach it to I/O pads */
{
__set_PCONP(PCSSPx, 1); /* Enable SSP module */
__set_PCLKSEL(PCLKSSPx, PCLKDIV_SSP); /* Select PCLK frequency for SSP */
SSPxCR0 = 0x0007; /* Set mode: SPI mode 0, 8-bit */
SSPxCR1 = 0x2; /* Enable SSP with Master */
#if SSP_CH == 0
__set_PINSEL(0, 15, 2); /* Attach SCK0 to I/O pad */
__set_PINSEL(0, 16, 2); /* Attach MISO0 to I/O pad */
__set_PINSEL(0, 17, 2); /* Attach MOSI0 to I/O pad */
FIO0DIR |= _BV(18)|_BV(17)|_BV(15); /* Set SCK0, MOSI0 and CS# as output */
#elif SSP_CH == 1
__set_PINSEL(0, 7, 2); /* Attach SCK1 to I/O pad */
__set_PINSEL(0, 8, 2); /* Attach MISO1 to I/O pad */
__set_PINSEL(0, 9, 2); /* Attach MOSI1 to I/O pad */
FIO0DIR |= _BV(9)|_BV(7)|_BV(6); /* Set SCK1, MOSI1 and CS# as output */
#endif
CS_HIGH(); /* Set CS# high */
for (Timer1 = 10; Timer1; ) ; /* 10ms */
}
static
void power_off (void) /* Disable SPI function */
{
select(); /* Wait for card ready */
deselect(); deselect();
return 0; /* Failed */
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Receive a data packet from the card */ /* Receive a data packet from the MMC */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
static static
int rcvr_datablock ( /* 1:OK, 0:Failed */ int rcvr_datablock ( /* 1:OK, 0:Error */
BYTE *buff, /* Data buffer to store received data */ BYTE *buff, /* Data buffer */
UINT btr /* Byte count */ UINT btr /* Data block length (byte) */
) )
{ {
BYTE d[2]; BYTE token;
UINT tmr;
for (tmr = 1000; tmr; tmr--) { /* Wait for data packet in timeout of 100ms */ Timer1 = 200;
rcvr_mmc(d, 1); do { /* Wait for DataStart token in timeout of 200ms */
if (d[0] != 0xFF) break; token = xchg_spi(0xFF);
DLY_US(100); /* This loop will take a time. Insert rot_rdq() here for multitask envilonment. */
} } while ((token == 0xFF) && Timer1);
if (d[0] != 0xFE) return 0; /* If not valid data token, return with error */ if(token != 0xFE) return 0; /* Function fails if invalid DataStart token or timeout */
rcvr_mmc(buff, btr); /* Receive the data block into buffer */ rcvr_spi_multi(buff, btr); /* Store trailing data to the buffer */
rcvr_mmc(d, 2); /* Discard CRC */ xchg_spi(0xFF); xchg_spi(0xFF); /* Discard CRC */
return 1; /* Return with success */ return 1; /* Function succeeded */
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Send a data packet to the card */ /* Send a data packet to the MMC */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
#if _USE_WRITE
static static
int xmit_datablock ( /* 1:OK, 0:Failed */ int xmit_datablock ( /* 1:OK, 0:Failed */
const BYTE *buff, /* 512 byte data block to be transmitted */ const BYTE *buff, /* Ponter to 512 byte data to be sent */
BYTE token /* Data/Stop token */ BYTE token /* Token */
) )
{ {
BYTE d[2]; BYTE resp;
if (!wait_ready()) return 0; if (!wait_ready(500)) return 0; /* Wait for card ready */
d[0] = token; xchg_spi(token); /* Send token */
xmit_mmc(d, 1); /* Xmit a token */ if (token != 0xFD) { /* Send data if token is other than StopTran */
if (token != 0xFD) { /* Is it data token? */ xmit_spi_multi(buff, 512); /* Data */
xmit_mmc(buff, 512); /* Xmit the 512 byte data block to MMC */ xchg_spi(0xFF); xchg_spi(0xFF); /* Dummy CRC */
rcvr_mmc(d, 2); /* Xmit dummy CRC (0xFF,0xFF) */
rcvr_mmc(d, 1); /* Receive data response */ resp = xchg_spi(0xFF); /* Receive data resp */
if ((d[0] & 0x1F) != 0x05) /* If not accepted, return with error */ if ((resp & 0x1F) != 0x05) /* Function fails if the data packet was not accepted */
return 0; return 0;
} }
return 1; return 1;
} }
#endif
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Send a command packet to the card */ /* Send a command packet to the MMC */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
static static
BYTE send_cmd ( /* Returns command response (bit7==1:Send failed)*/ BYTE send_cmd ( /* Return value: R1 resp (bit7==1:Failed to send) */
BYTE cmd, /* Command byte */ BYTE cmd, /* Command index */
DWORD arg /* Argument */ DWORD arg /* Argument */
) )
{ {
BYTE n, d, buf[6]; BYTE n, res;
if (cmd & 0x80) { /* ACMD<n> is the command sequense of CMD55-CMD<n> */ if (cmd & 0x80) { /* Send a CMD55 prior to ACMD<n> */
cmd &= 0x7F; cmd &= 0x7F;
n = send_cmd(CMD55, 0); res = send_cmd(CMD55, 0);
if (n > 1) return n; if (res > 1) return res;
} }
/* Select the card and wait for ready */ /* Select card */
deselect(); deselect();
if (!select()) return 0xFF; if (!select()) return 0xFF;
/* Send a command packet */ /* Send command packet */
buf[0] = 0x40 | cmd; /* Start + Command index */ xchg_spi(0x40 | cmd); /* Start + command index */
buf[1] = (BYTE)(arg >> 24); /* Argument[31..24] */ xchg_spi((BYTE)(arg >> 24)); /* Argument[31..24] */
buf[2] = (BYTE)(arg >> 16); /* Argument[23..16] */ xchg_spi((BYTE)(arg >> 16)); /* Argument[23..16] */
buf[3] = (BYTE)(arg >> 8); /* Argument[15..8] */ xchg_spi((BYTE)(arg >> 8)); /* Argument[15..8] */
buf[4] = (BYTE)arg; /* Argument[7..0] */ xchg_spi((BYTE)arg); /* Argument[7..0] */
n = 0x01; /* Dummy CRC + Stop */ n = 0x01; /* Dummy CRC + Stop */
if (cmd == CMD0) n = 0x95; /* (valid CRC for CMD0(0)) */ if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */
if (cmd == CMD8) n = 0x87; /* (valid CRC for CMD8(0x1AA)) */ if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */
buf[5] = n; xchg_spi(n);
xmit_mmc(buf, 6);
/* Receive command response */ /* Receive command resp */
if (cmd == CMD12) rcvr_mmc(&d, 1); /* Skip a stuff byte when stop reading */ if (cmd == CMD12) xchg_spi(0xFF); /* Diacard following one byte when CMD12 */
n = 10; /* Wait for a valid response in timeout of 10 attempts */ n = 10; /* Wait for response (10 bytes max) */
do do
rcvr_mmc(&d, 1); res = xchg_spi(0xFF);
while ((d & 0x80) && --n); while ((res & 0x80) && --n);
return d; /* Return with the response value */ return res; /* Return received response */
} }
@@ -314,112 +354,100 @@ BYTE send_cmd ( /* Returns command response (bit7==1:Send failed)*/
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Get Disk Status */ /* Initialize disk drive */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE drv /* Drive number (always 0) */
)
{
DSTATUS s;
BYTE d;
if (drv) return STA_NOINIT;
/* Check if the card is kept initialized */
s = Stat;
if (!(s & STA_NOINIT)) {
if (send_cmd(CMD13, 0)) /* Read card status */
s = STA_NOINIT;
rcvr_mmc(&d, 1); /* Receive following half of R2 */
deselect();
}
Stat = s;
return s;
}
/*-----------------------------------------------------------------------*/
/* Initialize Disk Drive */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
DSTATUS disk_initialize ( DSTATUS disk_initialize (
BYTE drv /* Physical drive nmuber (0) */ BYTE drv /* Physical drive number (0) */
) )
{ {
BYTE n, ty, cmd, buf[4]; BYTE n, cmd, ty, ocr[4];
UINT tmr;
DSTATUS s;
if (drv) return RES_NOTRDY; if (drv) return STA_NOINIT; /* Supports only drive 0 */
power_on(); /* Initialize SPI */
INIT_PORT(); /* Initialize control port */ if (Stat & STA_NODISK) return Stat; /* Is card existing in the soket? */
for (n = 10; n; n--) rcvr_mmc(buf, 1); /* 80 dummy clocks */
FCLK_SLOW();
for (n = 10; n; n--) xchg_spi(0xFF); /* Send 80 dummy clocks */
ty = 0; ty = 0;
if (send_cmd(CMD0, 0) == 1) { /* Enter Idle state */ if (send_cmd(CMD0, 0) == 1) { /* Put the card SPI/Idle state */
Timer1 = 1000; /* Initialization timeout = 1 sec */
if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2? */ if (send_cmd(CMD8, 0x1AA) == 1) { /* SDv2? */
rcvr_mmc(buf, 4); /* Get trailing return value of R7 resp */ for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF); /* Get 32 bit return value of R7 resp */
if (buf[2] == 0x01 && buf[3] == 0xAA) { /* The card can work at vdd range of 2.7-3.6V */ if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* Is the card supports vcc of 2.7-3.6V? */
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state (ACMD41 with HCS bit) */ while (Timer1 && send_cmd(ACMD41, 1UL << 30)) ; /* Wait for end of initialization with ACMD41(HCS) */
if (send_cmd(ACMD41, 1UL << 30) == 0) break; if (Timer1 && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
DLY_US(1000); for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
} ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* Card id SDv2 */
if (tmr && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
rcvr_mmc(buf, 4);
ty = (buf[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* SDv2 */
} }
} }
} else { /* SDv1 or MMCv3 */ } else { /* Not SDv2 card */
if (send_cmd(ACMD41, 0) <= 1) { if (send_cmd(ACMD41, 0) <= 1) { /* SDv1 or MMC? */
ty = CT_SD1; cmd = ACMD41; /* SDv1 */ ty = CT_SD1; cmd = ACMD41; /* SDv1 (ACMD41(0)) */
} else { } else {
ty = CT_MMC; cmd = CMD1; /* MMCv3 */ ty = CT_MMC; cmd = CMD1; /* MMCv3 (CMD1(0)) */
} }
for (tmr = 1000; tmr; tmr--) { /* Wait for leaving idle state */ while (Timer1 && send_cmd(cmd, 0)) ; /* Wait for end of initialization */
if (send_cmd(cmd, 0) == 0) break; if (!Timer1 || send_cmd(CMD16, 512) != 0) /* Set block length: 512 */
DLY_US(1000);
}
if (!tmr || send_cmd(CMD16, 512) != 0) /* Set R/W block length to 512 */
ty = 0; ty = 0;
} }
} }
CardType = ty; CardType = ty; /* Card type */
s = ty ? 0 : STA_NOINIT;
Stat = s;
deselect(); deselect();
return s; if (ty) { /* OK */
FCLK_FAST(); /* Set fast clock */
Stat &= ~STA_NOINIT; /* Clear STA_NOINIT flag */
} else { /* Failed */
power_off();
Stat = STA_NOINIT;
}
return Stat;
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Read Sector(s) */ /* Get disk status */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE drv /* Physical drive number (0) */
)
{
if (drv) return STA_NOINIT; /* Supports only drive 0 */
return Stat; /* Return disk status */
}
/*-----------------------------------------------------------------------*/
/* Read sector(s) */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
DRESULT disk_read ( DRESULT disk_read (
BYTE drv, /* Physical drive nmuber (0) */ BYTE drv, /* Physical drive number (0) */
BYTE *buff, /* Pointer to the data buffer to store read data */ BYTE *buff, /* Pointer to the data buffer to store read data */
DWORD sector, /* Start sector number (LBA) */ DWORD sector, /* Start sector number (LBA) */
BYTE count /* Sector count (1..128) */ BYTE count /* Number of sectors to read (1..128) */
) )
{ {
if (disk_status(drv) & STA_NOINIT) return RES_NOTRDY; if (drv || !count) return RES_PARERR; /* Check parameter */
if (!count) return RES_PARERR; if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
if (!(CardType & CT_BLOCK)) sector *= 512; /* Convert LBA to byte address if needed */
if (count == 1) { /* Single block read */ if (!(CardType & CT_BLOCK)) sector *= 512; /* LBA ot BA conversion (byte addressing cards) */
if (count == 1) { /* Single sector read */
if ((send_cmd(CMD17, sector) == 0) /* READ_SINGLE_BLOCK */ if ((send_cmd(CMD17, sector) == 0) /* READ_SINGLE_BLOCK */
&& rcvr_datablock(buff, 512)) && rcvr_datablock(buff, 512))
count = 0; count = 0;
} }
else { /* Multiple block read */ else { /* Multiple sector read */
if (send_cmd(CMD18, sector) == 0) { /* READ_MULTIPLE_BLOCK */ if (send_cmd(CMD18, sector) == 0) { /* READ_MULTIPLE_BLOCK */
do { do {
if (!rcvr_datablock(buff, 512)) break; if (!rcvr_datablock(buff, 512)) break;
@@ -430,33 +458,36 @@ DRESULT disk_read (
} }
deselect(); deselect();
return count ? RES_ERROR : RES_OK; return count ? RES_ERROR : RES_OK; /* Return result */
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Write Sector(s) */ /* Write sector(s) */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
#if _USE_WRITE
DRESULT disk_write ( DRESULT disk_write (
BYTE drv, /* Physical drive nmuber (0) */ BYTE drv, /* Physical drive number (0) */
const BYTE *buff, /* Pointer to the data to be written */ const BYTE *buff, /* Ponter to the data to write */
DWORD sector, /* Start sector number (LBA) */ DWORD sector, /* Start sector number (LBA) */
BYTE count /* Sector count (1..128) */ BYTE count /* Number of sectors to write (1..128) */
) )
{ {
if (disk_status(drv) & STA_NOINIT) return RES_NOTRDY; if (drv || !count) return RES_PARERR; /* Check parameter */
if (!count) return RES_PARERR; if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check drive status */
if (!(CardType & CT_BLOCK)) sector *= 512; /* Convert LBA to byte address if needed */ if (Stat & STA_PROTECT) return RES_WRPRT; /* Check write protect */
if (count == 1) { /* Single block write */ if (!(CardType & CT_BLOCK)) sector *= 512; /* LBA ==> BA conversion (byte addressing cards) */
if (count == 1) { /* Single sector write */
if ((send_cmd(CMD24, sector) == 0) /* WRITE_BLOCK */ if ((send_cmd(CMD24, sector) == 0) /* WRITE_BLOCK */
&& xmit_datablock(buff, 0xFE)) && xmit_datablock(buff, 0xFE))
count = 0; count = 0;
} }
else { /* Multiple block write */ else { /* Multiple sector write */
if (CardType & CT_SDC) send_cmd(ACMD23, count); if (CardType & CT_SDC) send_cmd(ACMD23, count); /* Predefine number of sectors */
if (send_cmd(CMD25, sector) == 0) { /* WRITE_MULTIPLE_BLOCK */ if (send_cmd(CMD25, sector) == 0) { /* WRITE_MULTIPLE_BLOCK */
do { do {
if (!xmit_datablock(buff, 0xFC)) break; if (!xmit_datablock(buff, 0xFC)) break;
@@ -468,72 +499,164 @@ DRESULT disk_write (
} }
deselect(); deselect();
return count ? RES_ERROR : RES_OK; return count ? RES_ERROR : RES_OK; /* Return result */
} }
#endif
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */ /* Miscellaneous drive controls other than data read/write */
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
#if _USE_IOCTL
DRESULT disk_ioctl ( DRESULT disk_ioctl (
BYTE drv, /* Physical drive nmuber (0) */ BYTE drv, /* Physical drive number (0) */
BYTE ctrl, /* Control code */ BYTE ctrl, /* Control command code */
void *buff /* Buffer to send/receive control data */ void *buff /* Pointer to the conrtol data */
) )
{ {
DRESULT res; DRESULT res;
BYTE n, csd[16]; BYTE n, csd[16], *ptr = buff;
DWORD cs; DWORD *dp, st, ed, csize;
if (disk_status(drv) & STA_NOINIT) return RES_NOTRDY; /* Check if card is in the socket */ if (drv) return RES_PARERR; /* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
res = RES_ERROR; res = RES_ERROR;
switch (ctrl) {
case CTRL_SYNC : /* Make sure that no pending write process */
if (select()) {
deselect();
res = RES_OK;
}
break;
case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */ switch (ctrl) {
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) { case CTRL_SYNC : /* Wait for end of internal write process of the drive */
if ((csd[0] >> 6) == 1) { /* SDC ver 2.00 */ if (select()) {
cs = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 8) + 1; deselect();
*(DWORD*)buff = cs << 10; res = RES_OK;
} else { /* SDC ver 1.XX or MMC */ }
n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2; break;
cs = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
*(DWORD*)buff = cs << (n - 9); case GET_SECTOR_COUNT : /* Get drive capacity in unit of sector (DWORD) */
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
if ((csd[0] >> 6) == 1) { /* SDC ver 2.00 */
csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
*(DWORD*)buff = csize << 10;
} else { /* SDC ver 1.XX or MMC ver 3 */
n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
*(DWORD*)buff = csize << (n - 9);
}
res = RES_OK;
}
break;
case GET_SECTOR_SIZE : /* Get sector size in unit of byte (WORD) */
*(WORD*)buff = 512;
res = RES_OK;
break;
case GET_BLOCK_SIZE : /* Get erase block size in unit of sector (DWORD) */
if (CardType & CT_SD2) { /* SDC ver 2.00 */
if (send_cmd(ACMD13, 0) == 0) { /* Read SD status */
xchg_spi(0xFF);
if (rcvr_datablock(csd, 16)) { /* Read partial block */
for (n = 64 - 16; n; n--) xchg_spi(0xFF); /* Purge trailing data */
*(DWORD*)buff = 16UL << (csd[10] >> 4);
res = RES_OK;
}
}
} else { /* SDC ver 1.XX or MMC */
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) { /* Read CSD */
if (CardType & CT_SD1) { /* SDC ver 1.XX */
*(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
} else { /* MMC */
*(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
} }
res = RES_OK; res = RES_OK;
} }
break; }
break;
case GET_BLOCK_SIZE : /* Get erase block size in unit of sector (DWORD) */ case CTRL_ERASE_SECTOR : /* Erase a block of sectors (used when _USE_ERASE == 1) */
*(DWORD*)buff = 128; if (!(CardType & CT_SDC)) break; /* Check if the card is SDC */
if (disk_ioctl(drv, MMC_GET_CSD, csd)) break; /* Get CSD */
if (!(csd[0] >> 6) && !(csd[10] & 0x40)) break; /* Check if sector erase can be applied to the card */
dp = buff; st = dp[0]; ed = dp[1]; /* Load sector block */
if (!(CardType & CT_BLOCK)) {
st *= 512; ed *= 512;
}
if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000)) /* Erase sector block */
res = RES_OK; /* FatFs does not check result of this command */
break;
/* Following command are not used by FatFs module */
case MMC_GET_TYPE : /* Get MMC/SDC type (BYTE) */
*ptr = CardType;
res = RES_OK;
break;
case MMC_GET_CSD : /* Read CSD (16 bytes) */
if (send_cmd(CMD9, 0) == 0 /* READ_CSD */
&& rcvr_datablock(ptr, 16))
res = RES_OK; res = RES_OK;
break; break;
default: case MMC_GET_CID : /* Read CID (16 bytes) */
res = RES_PARERR; if (send_cmd(CMD10, 0) == 0 /* READ_CID */
&& rcvr_datablock(ptr, 16))
res = RES_OK;
break;
case MMC_GET_OCR : /* Read OCR (4 bytes) */
if (send_cmd(CMD58, 0) == 0) { /* READ_OCR */
for (n = 4; n; n--) *ptr++ = xchg_spi(0xFF);
res = RES_OK;
}
break;
case MMC_GET_SDSTAT : /* Read SD status (64 bytes) */
if (send_cmd(ACMD13, 0) == 0) { /* SD_STATUS */
xchg_spi(0xFF);
if (rcvr_datablock(ptr, 64))
res = RES_OK;
}
break;
default:
res = RES_PARERR;
} }
deselect(); deselect();
return res; return res;
} }
#endif
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* This function is defined for only project compatibility */ /* Device timer function */
/*-----------------------------------------------------------------------*/
/* This function must be called from timer interrupt routine in period
/ of 1 ms to generate card control timing.
*/
void disk_timerproc (void) void disk_timerproc (void)
{ {
/* Nothing to do */ WORD n;
} BYTE s;
n = Timer1; /* 1kHz decrement timer stopped at 0 */
if (n) Timer1 = --n;
n = Timer2;
if (n) Timer2 = --n;
s = Stat;
if (WP) /* Write protected */
s |= STA_PROTECT;
else /* Write enabled */
s &= ~STA_PROTECT;
if (INS) /* Card is in socket */
s &= ~STA_NODISK;
else /* Socket empty */
s |= (STA_NODISK | STA_NOINIT);
Stat = s;
}