/*------------------------------------------------------------------------*/
/* MMCv3/SDv1/SDv2 (SPI mode) control module                              */
/*------------------------------------------------------------------------*/
/*
/  Copyright (C) 2010, 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 "iodefine.h"
#include "diskio.h"
//#include "monitor.h"

#define	_USE_CD		1	/* Use card detect switch */
#define _USE_WP		0	/* Use write protect switch */


/* 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 CMD55	(55)		/* APP_CMD */
#define CMD58	(58)		/* READ_OCR */


/* MMC control port and function controls  (Platform dependent) */

#define CS_LOW()	PORT.PGDR1.BIT.PG20DR = 0	/* MMC CS = L */
#define	CS_HIGH()	PORT.PGDR1.BIT.PG20DR = 1	/* MMC CS = H */
#define SOCKPORT	PORT.PJPR0.WORD		/* Socket contact input port (PJ) */
#define SOCKWP		0x0008				/* Write protect bit (PJ3) */
#define SOCKINS		0x0002				/* Card detect bit (PJ1) */

#define BCLK		48000000UL			/* Clock frequency supplied for SPI module */
#define CLK_FAST	24000000UL			/* Fast SCLK (working) */
#define	CLK_SLOW	400000UL			/* Fast SCLK (initialize) */
#define	DIV_F		(BCLK/CLK_FAST/2-1)
#define	DIV_S		(BCLK/CLK_SLOW/2-1)
#define	FCLK_SLOW()	{RSPI0.SPCR.BIT.SPE = 0; RSPI0.SPBR.BYTE=DIV_S; RSPI0.SPCR.BIT.SPE = 1;}	/* Set slow clock (100k-400k) */
#define	FCLK_FAST()	{RSPI0.SPCR.BIT.SPE = 0; RSPI0.SPBR.BYTE=DIV_F; RSPI0.SPCR.BIT.SPE = 1;}	/* Set fast clock (MMC:20MHz max, SD:25MHz max) */


/*--------------------------------------------------------------------------

   Module Private Functions

---------------------------------------------------------------------------*/

static volatile
DSTATUS Stat = STA_NOINIT;	/* Physical drive status */

static volatile
WORD Timer1, Timer2;	/* 100Hz decrement timer stopped at zero (disk_timerproc()) */

static
BYTE CardType;			/* Card type flags */



/*-----------------------------------------------------------------------*/
/* Send a byte to MMC  (Platform dependent)                              */
/*-----------------------------------------------------------------------*/

/* Send a byte */
static
void xmit_spi (
	BYTE dat	/* Data to send */
)
{
	RSPI0.SPDR.BYTE = dat;			/* Start transmission */
	while (!RSPI0.SPSR.BIT.SPRF) ;	/* Wait for end of transfer */
	RSPI0.SPDR.BYTE;				/* Discard received data */
}

/* Send multiple byte */
static
void xmit_spi_multi (
	const BYTE *buff,	/* Pointer to the data */
	UINT btx			/* Number of bytes to send */
)
{
	RSPI0.SPDR.BYTE = *buff++;	/* Start transmission (Push a byte into data pipe) */
	btx--;

	do {
		RSPI0.SPDR.BYTE = *buff++;		/* Send next byte */
		while (!RSPI0.SPSR.BIT.SPRF) ;	/* Wait for a byte sent */
		RSPI0.SPDR.BYTE;				/* Discard received byte */
	} while (--btx);					/* Repeat until all data sent */

	while (!RSPI0.SPSR.BIT.SPRF) ;		/* Discard byte in the data pipe */
	RSPI0.SPDR.BYTE;
}



/*-----------------------------------------------------------------------*/
/* Receive data from MMC  (Platform dependent)                           */
/*-----------------------------------------------------------------------*/

/* Receive a byte */
static
BYTE rcvr_spi (void)
{
	RSPI0.SPDR.BYTE = 0xFF;			/* Send a 0xFF */
	while (!RSPI0.SPSR.BIT.SPRF) ;	/* Wait for end of transfer */
	return RSPI0.SPDR.BYTE;			/* Returen received byte */
}

/* Receive multiple byte */
static
void rcvr_spi_multi (
	BYTE *buff,		/* Pointer to data buffer */
	UINT btr		/* Number of bytes to receive */
)
{
	RSPI0.SPDR.BYTE = 0xFF;				/* Send a 0xFF (Push a byte into data pipe) */
	btr--;

	do {
		RSPI0.SPDR.BYTE = 0xFF;			/* Send a 0xFF */
		while (!RSPI0.SPSR.BIT.SPRF) ;	/* Wait for end of transfer */
		*buff++ = RSPI0.SPDR.BYTE;		/* Store received byte */
	} while (--btr);					/* Repeat until all data received */

	while (!RSPI0.SPSR.BIT.SPRF) ;		/* Store left byte in the data pipe */
	*buff++ = RSPI0.SPDR.BYTE;
}




/*-----------------------------------------------------------------------*/
/* Wait for card ready                                                   */
/*-----------------------------------------------------------------------*/

static
int wait_ready (	/* 1:Ready, 0:Timeout */
	UINT wt			/* Timeout [ms] */
)
{
	Timer2 = (WORD)(wt / 10);

	do {
		if (rcvr_spi() == 0xFF) return 1;	/* Card goes ready */
		/* This loop takes a time. Insert rot_rdq() here for multitask envilonment. */
	} while (Timer2);	/* Wait until card goes ready or timeout */

	return 0;	/* Timeout occured */
}



/*-----------------------------------------------------------------------*/
/* Deselect card and release SPI                                         */
/*-----------------------------------------------------------------------*/

static
void deselect (void)
{
	CS_HIGH();		/* CS = H */
	rcvr_spi();		/* 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 = H */
	rcvr_spi();		/* Dummy clock (force DO enabled) */

	if (wait_ready(500)) return 1;	/* OK */

	deselect();
	return 0;	/* Timeout */
}



/*-----------------------------------------------------------------------*/
/* Control SPI module (Platform dependent)                               */
/*-----------------------------------------------------------------------*/

static
void power_on (void)	/* Enable SPI */
{
	CPG.STBCR5.BIT.MSTP51 = 0;	/* SPI0モジュール有効化 */

	/* Attach SPI0 module to I/O pads */
	PORT.PFCR3.WORD = 0x0003;								/* MISO0 */
	PORT.PFCR2.WORD = (PORT.PFCR2.WORD & 0x0F0F) | 0x3030;	/* RSPCK0, MOSI0 */
	PORT.PGIOR1.WORD |= 0x0010; PORT.PGCR5.WORD &= 0xFFF0;	/* MMC_CS */
	CS_HIGH();
	if (_USE_CD) {PORT.PJIOR0.WORD &= 0xFFFD; PORT.PJCR0.WORD &= 0xFF0F;}	/* MMC_CD */
	if (_USE_WP) {PORT.PJIOR0.WORD &= 0xFFF7; PORT.PJCR0.WORD &= 0x0FFF;}	/* MMC_WP */

	/* Enable SPI0 module */
	RSPI0.SPPCR.BYTE = 0;			/* Fixed idle value, disable loop-back mode */
	RSPI0.SPSCR.BYTE = 0;			/* Disable sequence control */
	RSPI0.SPDCR.BYTE = 0x20;		/* FIFO access width: 8-bit */
	RSPI0.SPBFCR.BYTE = 0xF0; RSPI0.SPBFCR.BYTE = 0x30;	/* Initialize FIFO */
	RSPI0.SPCMD0.WORD = 0x0700;		/* SPI mode: MODE0, 8bit, MSB first */
	RSPI0.SPCR.BYTE = 0x48;			/* Start SPI in master mode */
}


static
void power_off (void)	/* Disable SPI function */
{
	select();				/* Wait for card ready */
	deselect();

	RSPI0.SPCR.BIT.SPE = 0;		/* Stop SPI */
	CPG.STBCR5.BIT.MSTP51 = 1;	/* SPI0モジュール無効化 */
}



/*-----------------------------------------------------------------------*/
/* 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 = 20;
	do {							/* Wait for DataStart token in timeout of 200ms */
		token = rcvr_spi();
		/* 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 */
	rcvr_spi(); rcvr_spi();			/* Discard CRC */

	return 1;						/* Function succeeded */
}



/*-----------------------------------------------------------------------*/
/* Send a data packet to the MMC                                         */
/*-----------------------------------------------------------------------*/

#if _READONLY == 0
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;		/* Wait for card ready */

	xmit_spi(token);					/* Send token */
	if (token != 0xFD) {				/* Send data if token is other than StopTran */
		xmit_spi_multi(buff, 512);		/* Data */
		xmit_spi(0xFF); xmit_spi(0xFF);	/* Dummy CRC */

		resp = rcvr_spi();				/* Receive data resp */
		if ((resp & 0x1F) != 0x05)		/* Function fails if the data packet was not accepted */
			return 0;
	}
	return 1;
}
#endif /* _READONLY */



/*-----------------------------------------------------------------------*/
/* 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 card */
	deselect();
	if (!select()) return 0xFF;

	/* Send command packet */
	xmit_spi(0x40 | cmd);				/* Start + command index */
	xmit_spi((BYTE)(arg >> 24));		/* Argument[31..24] */
	xmit_spi((BYTE)(arg >> 16));		/* Argument[23..16] */
	xmit_spi((BYTE)(arg >> 8));			/* Argument[15..8] */
	xmit_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) */
	xmit_spi(n);

	/* Receive command resp */
	if (cmd == CMD12) rcvr_spi();		/* Diacard following one byte when CMD12 */
	n = 10;								/* Wait for response (10 bytes max) */
	do
		res = rcvr_spi();
	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 */
	if (Stat & STA_NODISK) return Stat;	/* Is card existing in the soket? */

	power_on();							/* Initialize SPI */
	FCLK_SLOW();						/* Set slow clock */
	for (n = 10; n; n--) rcvr_spi();	/* Send 80 dummy clocks */

	ty = 0;
	if (send_cmd(CMD0, 0) == 1) {			/* Put the card SPI/Idle state */
		Timer1 = 100;						/* Initialization timeout = 1 sec */
		if (send_cmd(CMD8, 0x1AA) == 1) {	/* SDv2? */
			for (n = 0; n < 4; n++) ocr[n] = rcvr_spi();		/* Get 32 bit return value of R7 resp */
			if (ocr[2] == 0x01 && ocr[3] == 0xAA) {				/* Is the card supports vcc of 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] = rcvr_spi();
					ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;	/* Card id SDv2 */
				}
			}
		} else {	/* Not SDv2 card */
			if (send_cmd(ACMD41, 0) <= 1) 	{	/* SDv1 or MMC? */
				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 end of initialization */
			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) */
	BYTE count		/* Number of sectors to read (1..128) */
)
{
	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) */

	if (count == 1) {	/* Single sector read */
		if ((send_cmd(CMD17, sector) == 0)	/* READ_SINGLE_BLOCK */
			&& rcvr_datablock(buff, 512))
			count = 0;
	}
	else {				/* Multiple sector read */
		if (send_cmd(CMD18, sector) == 0) {	/* READ_MULTIPLE_BLOCK */
			do {
				if (!rcvr_datablock(buff, 512)) break;
				buff += 512;
			} while (--count);
			send_cmd(CMD12, 0);				/* STOP_TRANSMISSION */
		}
	}
	deselect();

	return count ? RES_ERROR : RES_OK;	/* Return result */
}



/*-----------------------------------------------------------------------*/
/* Write sector(s)                                                       */
/*-----------------------------------------------------------------------*/

#if _READONLY == 0
DRESULT disk_write (
	BYTE drv,			/* Physical drive number (0) */
	const BYTE *buff,	/* Ponter to the data to write */
	DWORD sector,		/* Start sector number (LBA) */
	BYTE 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);
		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))	/* STOP_TRAN token */
				count = 1;
		}
	}
	deselect();

	return count ? RES_ERROR : RES_OK;	/* Return result */
}
#endif /* _READONLY == 0 */



/*-----------------------------------------------------------------------*/
/* Miscellaneous drive controls other than data read/write               */
/*-----------------------------------------------------------------------*/

#if _USE_IOCTL != 0
DRESULT disk_ioctl (
	BYTE drv,		/* Physical drive number (0) */
	BYTE ctrl,		/* Control command code */
	void *buff		/* Pointer to the conrtol data */
)
{
	DRESULT res;
	BYTE n, csd[16], *ptr = buff;
	WORD csize;
	DWORD d, *dp, st, ed;


	if (drv) return RES_PARERR;					/* Check parameter */
	if (Stat & STA_NOINIT) return RES_NOTRDY;	/* Check if drive is ready */

	res = RES_ERROR;

	switch (ctrl) {
	case CTRL_SYNC :		/* Wait for end of internal write process of the drive */
		if (select()) {
			deselect();
			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) + 1;
				*(DWORD*)buff = (DWORD)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 = (DWORD)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 */
				rcvr_spi();
				if (rcvr_datablock(csd, 16)) {				/* Read partial block */
					for (n = 64 - 16; n; n--) rcvr_spi();	/* 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_ERASE_SECTOR :	/* Erase a block of sectors (used when _USE_ERASE == 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;
		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;
		break;

	case MMC_GET_CID :		/* Read CID (16 bytes) */
		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++ = rcvr_spi();
			res = RES_OK;
		}
		break;

	case MMC_GET_SDSTAT :	/* Read SD status (64 bytes) */
		if (send_cmd(ACMD13, 0) == 0) {	/* SD_STATUS */
			rcvr_spi();
			if (rcvr_datablock(ptr, 64))
				res = RES_OK;
		}
		break;

	default:
		res = RES_PARERR;
	}

	deselect();

	return res;
}
#endif /* _USE_IOCTL != 0 */


/*-----------------------------------------------------------------------*/
/* Device timer function  (Platform dependent)                           */
/*-----------------------------------------------------------------------*/
/* This function must be called from timer interrupt routine in period
/  of 10 ms to generate card control timing.
*/

void disk_timerproc (void)
{
	static WORD pv;
	BYTE n, s;


	n = Timer1;						/* 100Hz decrement timer stopped at 0 */
	if (n) Timer1 = --n;
	n = Timer2;
	if (n) Timer2 = --n;

	n = pv;
	pv = SOCKPORT & (SOCKWP | SOCKINS);	/* Sample socket status */

	if (n == pv) {						/* Has contact stabled? */
		s = Stat;
		if (_USE_WP && (pv & SOCKWP))	/* WP == H (Write protected) */
			s |= STA_PROTECT;
		else							/* WP == L (Write enabled) */
			s &= ~STA_PROTECT;

		if (_USE_CD && (pv & SOCKINS))	/* CD == H (No card) */
			s |= (STA_NODISK | STA_NOINIT);
		else							/* CD == L (Card is exist) */
			s &= ~STA_NODISK;

		Stat = s;
	}
}

