You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
773 lines
22 KiB
773 lines
22 KiB
/*------------------------------------------------------------------------*/
|
|
/* LPCXpresso176x: MMCv3/SDv1/SDv2 (SPI mode) control module */
|
|
/*------------------------------------------------------------------------*/
|
|
/*
|
|
/ Copyright (C) 2015, ChaN, all right reserved.
|
|
/
|
|
/ * This software is a free software and there is NO WARRANTY.
|
|
/ * No restriction on use. You can use, modify and redistribute it for
|
|
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
|
|
/ * Redistributions of source code must retain the above copyright notice.
|
|
/
|
|
/-------------------------------------------------------------------------*/
|
|
|
|
#include "lpc17xx_ssp.h"
|
|
#include "lpc17xx_clkpwr.h"
|
|
#include "LPC176x.h"
|
|
|
|
#define SSP_CH 1 /* SSP channel to use (0:SSP0, 1:SSP1) */
|
|
|
|
#define SCLK_FAST 25000000UL /* SCLK frequency under normal operation [Hz] */
|
|
#define SCLK_SLOW 400000UL /* SCLK frequency under initialization [Hz] */
|
|
|
|
//#define MMC_CD (!(FIO2PIN1 & _BV(1))) /* Card detect (yes:true, no:false, default:true) */
|
|
#define MMC_WP 0 /* Write protected (yes:true, no:false, default:false) */
|
|
|
|
#if SSP_CH == 0
|
|
#define SSPxDR SSP0DR
|
|
#define SSPxSR SSP0SR
|
|
#define SSPxCR0 SSP0CR0
|
|
#define SSPxCR1 SSP0CR1
|
|
#define SSPxCPSR SSP0CPSR
|
|
#define CS_LOW() {FIO0CLR2 = _BV(0);} /* Set P0.16 low */
|
|
#define CS_HIGH() {FIO0SET2 = _BV(0);} /* Set P0.16 high */
|
|
#define PCSSPx PCSSP0
|
|
#define PCLKSSPx PCLK_SSP0
|
|
#define ATTACH_SSP() {\
|
|
__set_PINSEL(0, 15, 2); /* SCK0 */\
|
|
__set_PINSEL(0, 17, 2); /* MISO0 */\
|
|
__set_PINSEL(0, 18, 2); /* MOSI0 */\
|
|
FIO0DIR |= _BV(16); /* CS# (P0.16) */\
|
|
}
|
|
#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
|
|
#define ATTACH_SSP() {\
|
|
__set_PINSEL(0, 7, 2); /* SCK1 */\
|
|
__set_PINSEL(0, 8, 2); /* MISO1 */\
|
|
__set_PINSEL(0, 9, 2); /* MOSI1 */\
|
|
FIO0DIR |= _BV(6); /* CS# (P0.6) */\
|
|
}
|
|
#endif
|
|
|
|
#define PCLKDIV_SSP PCLKDIV_2
|
|
|
|
static void set_spi_clock(uint32_t target_clock)
|
|
{
|
|
uint32_t prescale, cr0_div, cmp_clk, ssp_clk;
|
|
|
|
/* The SSP clock is derived from the (main system oscillator / 2),
|
|
so compute the best divider from that clock */
|
|
#if SSP_CH == 0
|
|
ssp_clk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_SSP0);
|
|
#elif SSP_CH == 1
|
|
ssp_clk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_SSP1);
|
|
#endif
|
|
|
|
/* Find closest divider to get at or under the target frequency.
|
|
Use smallest prescale possible and rely on the divider to get
|
|
the closest target frequency */
|
|
cr0_div = 0;
|
|
cmp_clk = 0xFFFFFFFF;
|
|
prescale = 2;
|
|
while (cmp_clk > target_clock)
|
|
{
|
|
cmp_clk = ssp_clk / ((cr0_div + 1) * prescale);
|
|
if (cmp_clk > target_clock)
|
|
{
|
|
cr0_div++;
|
|
if (cr0_div > 0xFF)
|
|
{
|
|
cr0_div = 0;
|
|
prescale += 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Write computed prescaler and divider back to register */
|
|
SSPxCR0 &= (~SSP_CR0_SCR(0xFF)) & SSP_CR0_BITMASK;
|
|
SSPxCR0 |= (SSP_CR0_SCR(cr0_div)) & SSP_CR0_BITMASK;
|
|
SSPxCPSR = prescale & SSP_CPSR_BITMASK;
|
|
}
|
|
|
|
|
|
#define FCLK_FAST() set_spi_clock(SCLK_FAST)
|
|
#define FCLK_SLOW() set_spi_clock(SCLK_SLOW)
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Module Private Functions
|
|
|
|
---------------------------------------------------------------------------*/
|
|
|
|
#include "diskio.h"
|
|
|
|
|
|
/* MMC/SD command */
|
|
#define CMD0 (0) /* GO_IDLE_STATE */
|
|
#define CMD1 (1) /* SEND_OP_COND (MMC) */
|
|
#define ACMD41 (0x80+41) /* SEND_OP_COND (SDC) */
|
|
#define CMD8 (8) /* SEND_IF_COND */
|
|
#define CMD9 (9) /* SEND_CSD */
|
|
#define CMD10 (10) /* SEND_CID */
|
|
#define CMD12 (12) /* STOP_TRANSMISSION */
|
|
#define ACMD13 (0x80+13) /* SD_STATUS (SDC) */
|
|
#define CMD16 (16) /* SET_BLOCKLEN */
|
|
#define CMD17 (17) /* READ_SINGLE_BLOCK */
|
|
#define CMD18 (18) /* READ_MULTIPLE_BLOCK */
|
|
#define CMD23 (23) /* SET_BLOCK_COUNT (MMC) */
|
|
#define ACMD23 (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */
|
|
#define CMD24 (24) /* WRITE_BLOCK */
|
|
#define CMD25 (25) /* WRITE_MULTIPLE_BLOCK */
|
|
#define CMD32 (32) /* ERASE_ER_BLK_START */
|
|
#define CMD33 (33) /* ERASE_ER_BLK_END */
|
|
#define CMD38 (38) /* ERASE */
|
|
#define CMD48 (48) /* READ_EXTR_SINGLE */
|
|
#define CMD49 (49) /* WRITE_EXTR_SINGLE */
|
|
#define CMD55 (55) /* APP_CMD */
|
|
#define CMD58 (58) /* READ_OCR */
|
|
|
|
|
|
static volatile
|
|
DSTATUS Stat = STA_NOINIT; /* Physical drive status */
|
|
|
|
static volatile
|
|
UINT Timer1, Timer2; /* 1kHz decrement timer stopped at zero (disk_timerproc()) */
|
|
|
|
static
|
|
BYTE CardType; /* Card type flags */
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Send/Receive data to the MMC (Platform dependent) */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
/* Exchange a byte */
|
|
static
|
|
BYTE xchg_spi (
|
|
BYTE dat /* Data to send */
|
|
)
|
|
{
|
|
SSPxDR = dat;
|
|
while (SSPxSR & 0x10) ;
|
|
return SSPxDR;
|
|
}
|
|
|
|
|
|
/* Receive multiple byte */
|
|
static
|
|
void rcvr_spi_multi (
|
|
BYTE *buff, /* Pointer to data buffer */
|
|
UINT btr /* Number of bytes to receive (16, 64 or 512) */
|
|
)
|
|
{
|
|
UINT n;
|
|
WORD d;
|
|
|
|
|
|
SSPxCR0 |= 0x000F; /* Select 16-bit mode */
|
|
|
|
for (n = 0; n < 8; n++) /* Push 8 frames into pipeline */
|
|
SSPxDR = 0xFFFF;
|
|
btr -= 16;
|
|
|
|
while (btr >= 2) { /* Receive the data block into buffer */
|
|
btr -= 2;
|
|
while (!(SSPxSR & _BV(2))) ; /* Wait for any data in receive FIFO */
|
|
d = SSPxDR;
|
|
SSPxDR = 0xFFFF;
|
|
*buff++ = d >> 8;
|
|
*buff++ = d;
|
|
}
|
|
|
|
for (n = 0; n < 8; n++) { /* Pop remaining frames from pipeline */
|
|
while (!(SSPxSR & _BV(2))) ;
|
|
d = SSPxDR;
|
|
*buff++ = d >> 8;
|
|
*buff++ = d;
|
|
}
|
|
|
|
SSPxCR0 &= 0xFFF7; /* Select 8-bit mode */
|
|
}
|
|
|
|
|
|
#if _DISKIO_WRITE
|
|
/* Send multiple byte */
|
|
static
|
|
void xmit_spi_multi (
|
|
const BYTE *buff, /* Pointer to the data */
|
|
UINT btx /* Number of bytes to send (multiple of 16) */
|
|
)
|
|
{
|
|
UINT n;
|
|
WORD d;
|
|
|
|
|
|
SSPxCR0 |= 0x000F; /* Select 16-bit mode */
|
|
|
|
for (n = 0; n < 8; n++) { /* Push 8 frames into pipeline */
|
|
d = *buff++;
|
|
d = d << 8 | *buff++;
|
|
SSPxDR = d;
|
|
}
|
|
btx -= 16;
|
|
|
|
while (btx >= 2) { /* Transmit data block */
|
|
btx -= 2;
|
|
d = *buff++;
|
|
d = d << 8 | *buff++;
|
|
while (!(SSPxSR & _BV(2))) ; /* Wait for any data in receive FIFO */
|
|
SSPxDR; SSPxDR = d;
|
|
}
|
|
|
|
for (n = 0; n < 8; n++) { /* Flush pipeline */
|
|
while (!(SSPxSR & _BV(2))) ;
|
|
SSPxDR;
|
|
}
|
|
|
|
SSPxCR0 &= 0xFFF7; /* Select 8-bit mode */
|
|
}
|
|
#endif
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Wait for card ready */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
int wait_ready ( /* 1:Ready, 0:Timeout */
|
|
UINT wt /* Timeout [ms] */
|
|
)
|
|
{
|
|
BYTE d;
|
|
|
|
|
|
Timer2 = wt;
|
|
do {
|
|
d = xchg_spi(0xFF);
|
|
|
|
/* This loop takes a time. Insert rot_rdq() here for multitask envilonment. */
|
|
|
|
} while (d != 0xFF && Timer2); /* Wait for card goes ready or timeout */
|
|
|
|
return (d == 0xFF) ? 1 : 0;
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Deselect card and release SPI */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
void deselect (void)
|
|
{
|
|
CS_HIGH(); /* CS = H */
|
|
xchg_spi(0xFF); /* Dummy clock (force DO hi-z for multiple slave SPI) */
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Select card and wait for ready */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
int select (void) /* 1:OK, 0:Timeout */
|
|
{
|
|
CS_LOW(); /* CS = L */
|
|
xchg_spi(0xFF); /* Dummy clock (force DO enabled) */
|
|
|
|
if (wait_ready(500)) return 1; /* Leading busy check: Wait for card ready */
|
|
|
|
deselect(); /* Timeout */
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* 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 */
|
|
ATTACH_SSP(); /* Attach SSP module to I/O pads */
|
|
CS_HIGH(); /* Set CS# high */
|
|
|
|
for (Timer1 = 10; Timer1; ) ; /* 10ms */
|
|
}
|
|
|
|
|
|
static
|
|
void power_off (void) /* Disable SPI function */
|
|
{
|
|
select(); /* Wait for card ready */
|
|
deselect();
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Receive a data packet from the MMC */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
int rcvr_datablock ( /* 1:OK, 0:Error */
|
|
BYTE *buff, /* Data buffer */
|
|
UINT btr /* Data block length (byte) */
|
|
)
|
|
{
|
|
BYTE token;
|
|
|
|
|
|
Timer1 = 200;
|
|
do { /* Wait for DataStart token in timeout of 200ms */
|
|
token = xchg_spi(0xFF);
|
|
|
|
/* This loop will take a time. Insert rot_rdq() here for multitask envilonment. */
|
|
|
|
} while ((token == 0xFF) && Timer1);
|
|
if(token != 0xFE) return 0; /* Function fails if invalid DataStart token or timeout */
|
|
|
|
rcvr_spi_multi(buff, btr); /* Store trailing data to the buffer */
|
|
xchg_spi(0xFF); xchg_spi(0xFF); /* Discard CRC */
|
|
|
|
return 1; /* Function succeeded */
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Send a data packet to the MMC */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#if _DISKIO_WRITE
|
|
static
|
|
int xmit_datablock ( /* 1:OK, 0:Failed */
|
|
const BYTE *buff, /* Ponter to 512 byte data to be sent */
|
|
BYTE token /* Token */
|
|
)
|
|
{
|
|
BYTE resp;
|
|
|
|
|
|
if (!wait_ready(500)) return 0; /* Leading busy check: Wait for card ready to accept data block */
|
|
|
|
xchg_spi(token); /* Send token */
|
|
if (token == 0xFD) return 1; /* Do not send data if token is StopTran */
|
|
|
|
xmit_spi_multi(buff, 512); /* Data */
|
|
xchg_spi(0xFF); xchg_spi(0xFF); /* Dummy CRC */
|
|
|
|
resp = xchg_spi(0xFF); /* Receive data resp */
|
|
|
|
return (resp & 0x1F) == 0x05 ? 1 : 0; /* Data was accepted or not */
|
|
|
|
/* Busy check is done at next transmission */
|
|
}
|
|
#endif
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Send a command packet to the MMC */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
static
|
|
BYTE send_cmd ( /* Return value: R1 resp (bit7==1:Failed to send) */
|
|
BYTE cmd, /* Command index */
|
|
DWORD arg /* Argument */
|
|
)
|
|
{
|
|
BYTE n, res;
|
|
|
|
|
|
if (cmd & 0x80) { /* Send a CMD55 prior to ACMD<n> */
|
|
cmd &= 0x7F;
|
|
res = send_cmd(CMD55, 0);
|
|
if (res > 1) return res;
|
|
}
|
|
|
|
/* Select the card and wait for ready except to stop multiple block read */
|
|
if (cmd != CMD12) {
|
|
deselect();
|
|
if (!select()) return 0xFF;
|
|
}
|
|
|
|
/* Send command packet */
|
|
xchg_spi(0x40 | cmd); /* Start + command index */
|
|
xchg_spi((BYTE)(arg >> 24)); /* Argument[31..24] */
|
|
xchg_spi((BYTE)(arg >> 16)); /* Argument[23..16] */
|
|
xchg_spi((BYTE)(arg >> 8)); /* Argument[15..8] */
|
|
xchg_spi((BYTE)arg); /* Argument[7..0] */
|
|
n = 0x01; /* Dummy CRC + Stop */
|
|
if (cmd == CMD0) n = 0x95; /* Valid CRC for CMD0(0) */
|
|
if (cmd == CMD8) n = 0x87; /* Valid CRC for CMD8(0x1AA) */
|
|
xchg_spi(n);
|
|
|
|
/* Receive command resp */
|
|
if (cmd == CMD12) xchg_spi(0xFF); /* Diacard following one byte when CMD12 */
|
|
n = 10; /* Wait for response (10 bytes max) */
|
|
do
|
|
res = xchg_spi(0xFF);
|
|
while ((res & 0x80) && --n);
|
|
|
|
return res; /* Return received response */
|
|
}
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------------------
|
|
|
|
Public Functions
|
|
|
|
---------------------------------------------------------------------------*/
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Initialize disk drive */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
DSTATUS disk_initialize (
|
|
BYTE drv /* Physical drive number (0) */
|
|
)
|
|
{
|
|
BYTE n, cmd, ty, ocr[4];
|
|
|
|
|
|
if (drv) return STA_NOINIT; /* Supports only drive 0 */
|
|
power_on(); /* Initialize SPI */
|
|
|
|
if (Stat & STA_NODISK) return Stat; /* Is a card existing in the soket? */
|
|
|
|
FCLK_SLOW();
|
|
for (n = 10; n; n--) xchg_spi(0xFF); /* Send 80 dummy clocks */
|
|
|
|
ty = 0;
|
|
if (send_cmd(CMD0, 0) == 1) { /* Put the card SPI state */
|
|
Timer1 = 1000; /* Initialization timeout = 1 sec */
|
|
if (send_cmd(CMD8, 0x1AA) == 1) { /* Is the catd SDv2? */
|
|
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF); /* Get 32 bit return value of R7 resp */
|
|
if (ocr[2] == 0x01 && ocr[3] == 0xAA) { /* Does the card support 2.7-3.6V? */
|
|
while (Timer1 && send_cmd(ACMD41, 1UL << 30)) ; /* Wait for end of initialization with ACMD41(HCS) */
|
|
if (Timer1 && send_cmd(CMD58, 0) == 0) { /* Check CCS bit in the OCR */
|
|
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
|
|
ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2; /* Check if the card is SDv2 */
|
|
}
|
|
}
|
|
} else { /* Not an SDv2 card */
|
|
if (send_cmd(ACMD41, 0) <= 1) { /* SDv1 or MMCv3? */
|
|
ty = CT_SD1; cmd = ACMD41; /* SDv1 (ACMD41(0)) */
|
|
} else {
|
|
ty = CT_MMC; cmd = CMD1; /* MMCv3 (CMD1(0)) */
|
|
}
|
|
while (Timer1 && send_cmd(cmd, 0)) ; /* Wait for the card leaves idle state */
|
|
if (!Timer1 || send_cmd(CMD16, 512) != 0) /* Set block length: 512 */
|
|
ty = 0;
|
|
}
|
|
}
|
|
CardType = ty; /* Card type */
|
|
deselect();
|
|
|
|
if (ty) { /* OK */
|
|
FCLK_FAST(); /* Set fast clock */
|
|
Stat &= ~STA_NOINIT; /* Clear STA_NOINIT flag */
|
|
} else { /* Failed */
|
|
power_off();
|
|
Stat = STA_NOINIT;
|
|
}
|
|
|
|
return Stat;
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* 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 (
|
|
BYTE drv, /* Physical drive number (0) */
|
|
BYTE *buff, /* Pointer to the data buffer to store read data */
|
|
DWORD sector, /* Start sector number (LBA) */
|
|
UINT count /* Number of sectors to read (1..128) */
|
|
)
|
|
{
|
|
BYTE cmd;
|
|
|
|
|
|
if (drv || !count) return RES_PARERR; /* Check parameter */
|
|
if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
|
|
if (!(CardType & CT_BLOCK)) sector *= 512; /* LBA ot BA conversion (byte addressing cards) */
|
|
|
|
cmd = count > 1 ? CMD18 : CMD17; /* READ_MULTIPLE_BLOCK : READ_SINGLE_BLOCK */
|
|
if (send_cmd(cmd, sector) == 0) {
|
|
do {
|
|
if (!rcvr_datablock(buff, 512)) break;
|
|
buff += 512;
|
|
} while (--count);
|
|
if (cmd == CMD18) send_cmd(CMD12, 0); /* STOP_TRANSMISSION */
|
|
}
|
|
deselect();
|
|
|
|
return count ? RES_ERROR : RES_OK; /* Return result */
|
|
}
|
|
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Write sector(s) */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#if _DISKIO_WRITE
|
|
DRESULT disk_write (
|
|
BYTE drv, /* Physical drive number (0) */
|
|
const BYTE *buff, /* Ponter to the data to write */
|
|
DWORD sector, /* Start sector number (LBA) */
|
|
UINT count /* Number of sectors to write (1..128) */
|
|
)
|
|
{
|
|
if (drv || !count) return RES_PARERR; /* Check parameter */
|
|
if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check drive status */
|
|
if (Stat & STA_PROTECT) return RES_WRPRT; /* Check write protect */
|
|
|
|
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 */
|
|
&& xmit_datablock(buff, 0xFE)) {
|
|
count = 0;
|
|
}
|
|
}
|
|
else { /* Multiple sector write */
|
|
if (CardType & CT_SDC) send_cmd(ACMD23, count); /* Predefine number of sectors */
|
|
if (send_cmd(CMD25, sector) == 0) { /* WRITE_MULTIPLE_BLOCK */
|
|
do {
|
|
if (!xmit_datablock(buff, 0xFC)) break;
|
|
buff += 512;
|
|
} while (--count);
|
|
if (!xmit_datablock(0, 0xFD)) count = 1; /* STOP_TRAN token */
|
|
}
|
|
}
|
|
deselect();
|
|
|
|
return count ? RES_ERROR : RES_OK; /* Return result */
|
|
}
|
|
#endif
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* Miscellaneous drive controls other than data read/write */
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
#if _DISKIO_IOCTL
|
|
|
|
DRESULT disk_ioctl (
|
|
BYTE drv, /* Physical drive number (0) */
|
|
BYTE cmd, /* Control command code */
|
|
void *buff /* Pointer to the conrtol data */
|
|
)
|
|
{
|
|
DRESULT res;
|
|
BYTE n, csd[16], *ptr = buff;
|
|
DWORD *dp, st, ed, csize;
|
|
#if _DISKIO_ISDIO
|
|
SDIO_CMD *sdio = buff;
|
|
BYTE rc, *buf;
|
|
UINT dc;
|
|
#endif
|
|
|
|
if (drv) return RES_PARERR; /* Check parameter */
|
|
if (Stat & STA_NOINIT) return RES_NOTRDY; /* Check if drive is ready */
|
|
|
|
res = RES_ERROR;
|
|
|
|
switch (cmd) {
|
|
case CTRL_SYNC: /* Wait for end of internal write process of the drive */
|
|
if (select()) res = RES_OK;
|
|
break;
|
|
|
|
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_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;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case CTRL_TRIM: /* Erase a block of sectors (used when _USE_TRIM in ffconf.h is 1) */
|
|
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 commands are never 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 && rcvr_datablock(ptr, 16)) { /* READ_CSD */
|
|
res = RES_OK;
|
|
}
|
|
break;
|
|
|
|
case MMC_GET_CID: /* Read CID (16 bytes) */
|
|
if (send_cmd(CMD10, 0) == 0 && rcvr_datablock(ptr, 16)) { /* READ_CID */
|
|
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;
|
|
#if _DISKIO_ISDIO
|
|
case ISDIO_READ:
|
|
sdio = buff;
|
|
if (send_cmd(CMD48, 0x80000000 | sdio->func << 28 | sdio->addr << 9 | ((sdio->ndata - 1) & 0x1FF)) == 0) {
|
|
for (Timer1 = 1000; (rc = xchg_spi(0xFF)) == 0xFF && Timer1; ) ;
|
|
if (rc == 0xFE) {
|
|
for (buf = sdio->data, dc = sdio->ndata; dc; dc--) *buf++ = xchg_spi(0xFF);
|
|
for (dc = 514 - sdio->ndata; dc; dc--) xchg_spi(0xFF);
|
|
res = RES_OK;
|
|
}
|
|
}
|
|
break;
|
|
case ISDIO_WRITE:
|
|
sdio = buff;
|
|
if (send_cmd(CMD49, 0x80000000 | sdio->func << 28 | sdio->addr << 9 | ((sdio->ndata - 1) & 0x1FF)) == 0) {
|
|
xchg_spi(0xFF); xchg_spi(0xFE);
|
|
for (buf = sdio->data, dc = sdio->ndata; dc; dc--) xchg_spi(*buf++);
|
|
for (dc = 514 - sdio->ndata; dc; dc--) xchg_spi(0xFF);
|
|
if ((xchg_spi(0xFF) & 0x1F) == 0x05) res = RES_OK;
|
|
}
|
|
break;
|
|
case ISDIO_MRITE:
|
|
sdio = buff;
|
|
if (send_cmd(CMD49, 0x84000000 | sdio->func << 28 | sdio->addr << 9 | sdio->ndata >> 8) == 0) {
|
|
xchg_spi(0xFF); xchg_spi(0xFE);
|
|
xchg_spi(sdio->ndata);
|
|
for (dc = 513; dc; dc--) xchg_spi(0xFF);
|
|
if ((xchg_spi(0xFF) & 0x1F) == 0x05) res = RES_OK;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
res = RES_PARERR;
|
|
}
|
|
|
|
deselect();
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
/* 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)
|
|
{
|
|
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 (MMC_WP) { /* Write protected */
|
|
s |= STA_PROTECT;
|
|
} else { /* Write enabled */
|
|
s &= ~STA_PROTECT;
|
|
}
|
|
//if (MMC_CD) { /* Card is in socket */
|
|
s &= ~STA_NODISK;
|
|
//} else { /* Socket empty */
|
|
// s |= (STA_NODISK | STA_NOINIT);
|
|
//}
|
|
Stat = s;
|
|
}
|
|
|
|
|