cmd_ide.c

	ide_led (DEVICE_LED(device), 1);	/* LED on	*/
	/* Select device
	 */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	dev_desc->if_type=IF_TYPE_IDE;
#ifdef CONFIG_ATAPI

    do_retry = 0;
    retries = 0;

    /* Warning: This will be tricky to read */
    while (retries <= 1) {
	/* check signature */
	if ((ide_inb(device,ATA_SECT_CNT) == 0x01) &&
		 (ide_inb(device,ATA_SECT_NUM) == 0x01) &&
		 (ide_inb(device,ATA_CYL_LOW)  == 0x14) &&
		 (ide_inb(device,ATA_CYL_HIGH) == 0xEB)) {
		/* ATAPI Signature found */
		dev_desc->if_type=IF_TYPE_ATAPI;
		/* Start Ident Command
		 */
		ide_outb (device, ATA_COMMAND, ATAPI_CMD_IDENT);
		/*
		 * Wait for completion - ATAPI devices need more time
		 * to become ready
		 */
		c = ide_wait (device, ATAPI_TIME_OUT);
	} else
#endif
	{
		/* Start Ident Command
		 */
		ide_outb (device, ATA_COMMAND, ATA_CMD_IDENT);

		/* Wait for completion
		 */
		c = ide_wait (device, IDE_TIME_OUT);
	}
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/

	if (((c & ATA_STAT_DRQ) == 0) ||
	    ((c & (ATA_STAT_FAULT|ATA_STAT_ERR)) != 0) ) {
#ifdef CONFIG_ATAPI
		{
			/* Need to soft reset the device in case it's an ATAPI...  */
			debug ("Retrying...\n");
			ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
			udelay(100000);
			ide_outb (device, ATA_COMMAND, 0x08);
			udelay (500000);	/* 500 ms */
		}
		/* Select device
		 */
		ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
		retries++;
#else
		return;
#endif
	}
#ifdef CONFIG_ATAPI
	else
		break;
    }	/* see above - ugly to read */

	if (retries == 2) /* Not found */
		return;
#endif

	input_swap_data (device, (ulong *)&iop, ATA_SECTORWORDS);

	ident_cpy ((unsigned char*)dev_desc->revision, iop.fw_rev, sizeof(dev_desc->revision));
	ident_cpy ((unsigned char*)dev_desc->vendor, iop.model, sizeof(dev_desc->vendor));
	ident_cpy ((unsigned char*)dev_desc->product, iop.serial_no, sizeof(dev_desc->product));
#ifdef __LITTLE_ENDIAN
	/*
	 * firmware revision, model, and serial number have Big Endian Byte
	 * order in Word. Convert all three to little endian.
	 *
	 * See CF+ and CompactFlash Specification Revision 2.0:
	 * 6.2.1.6: Identify Drive, Table 39 for more details
	 */

	strswab (dev_desc->revision);
	strswab (dev_desc->vendor);
	strswab (dev_desc->product);
#endif /* __LITTLE_ENDIAN */

	if ((iop.config & 0x0080) == 0x0080)
		dev_desc->removable = 1;
	else
		dev_desc->removable = 0;

#ifdef CONFIG_TUNE_PIO
	/* Mode 0 - 2 only, are directly determined by word 51. */
	pio_mode = iop.tPIO;
	if (pio_mode > 2) {
		printf("WARNING: Invalid PIO (word 51 = %d).\n", pio_mode);
		pio_mode = 0; /* Force it to dead slow, and hope for the best... */
	}

	/* Any CompactFlash Storage Card that supports PIO mode 3 or above
	 * shall set bit 1 of word 53 to one and support the fields contained
	 * in words 64 through 70.
	 */
	if (iop.field_valid & 0x02) {
		/* Mode 3 and above are possible.  Check in order from slow
		 * to fast, so we wind up with the highest mode allowed.
		 */
		if (iop.eide_pio_modes & 0x01)
			pio_mode = 3;
		if (iop.eide_pio_modes & 0x02)
			pio_mode = 4;
		if (ata_id_is_cfa((u16 *)&iop)) {
			if ((iop.cf_advanced_caps & 0x07) == 0x01)
				pio_mode = 5;
			if ((iop.cf_advanced_caps & 0x07) == 0x02)
				pio_mode = 6;
		}
	}

	/* System-specific, depends on bus speeds, etc. */
	ide_set_piomode(pio_mode);
#endif /* CONFIG_TUNE_PIO */

#if 0
	/*
	 * Drive PIO mode autoselection
	 */
	mode = iop.tPIO;

	printf ("tPIO = 0x%02x = %d\n",mode, mode);
	if (mode > 2) {		/* 2 is maximum allowed tPIO value */
		mode = 2;
		debug ("Override tPIO -> 2\n");
	}
	if (iop.field_valid & 2) {	/* drive implements ATA2? */
		debug ("Drive implements ATA2\n");
		if (iop.capability & 8) {	/* drive supports use_iordy? */
			cycle_time = iop.eide_pio_iordy;
		} else {
			cycle_time = iop.eide_pio;
		}
		debug ("cycle time = %d\n", cycle_time);
		mode = 4;
		if (cycle_time > 120) mode = 3;	/* 120 ns for PIO mode 4 */
		if (cycle_time > 180) mode = 2;	/* 180 ns for PIO mode 3 */
		if (cycle_time > 240) mode = 1;	/* 240 ns for PIO mode 4 */
		if (cycle_time > 383) mode = 0;	/* 383 ns for PIO mode 4 */
	}
	printf ("PIO mode to use: PIO %d\n", mode);
#endif /* 0 */

#ifdef CONFIG_ATAPI
	if (dev_desc->if_type==IF_TYPE_ATAPI) {
		atapi_inquiry(dev_desc);
		return;
	}
#endif /* CONFIG_ATAPI */

#ifdef __BIG_ENDIAN
	/* swap shorts */
	dev_desc->lba = (iop.lba_capacity << 16) | (iop.lba_capacity >> 16);
#else	/* ! __BIG_ENDIAN */
	/*
	 * do not swap shorts on little endian
	 *
	 * See CF+ and CompactFlash Specification Revision 2.0:
	 * 6.2.1.6: Identfy Drive, Table 39, Word Address 57-58 for details.
	 */
	dev_desc->lba = iop.lba_capacity;
#endif	/* __BIG_ENDIAN */

#ifdef CONFIG_LBA48
	if (iop.command_set_2 & 0x0400) { /* LBA 48 support */
		dev_desc->lba48 = 1;
		dev_desc->lba = (unsigned long long)iop.lba48_capacity[0] |
						  ((unsigned long long)iop.lba48_capacity[1] << 16) |
						  ((unsigned long long)iop.lba48_capacity[2] << 32) |
						  ((unsigned long long)iop.lba48_capacity[3] << 48);
	} else {
		dev_desc->lba48 = 0;
	}
#endif /* CONFIG_LBA48 */
	/* assuming HD */
	dev_desc->type=DEV_TYPE_HARDDISK;
	dev_desc->blksz=ATA_BLOCKSIZE;
	dev_desc->lun=0; /* just to fill something in... */

#if 0	/* only used to test the powersaving mode,
	 * if enabled, the drive goes after 5 sec
	 * in standby mode */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	c = ide_wait (device, IDE_TIME_OUT);
	ide_outb (device, ATA_SECT_CNT, 1);
	ide_outb (device, ATA_LBA_LOW,  0);
	ide_outb (device, ATA_LBA_MID,  0);
	ide_outb (device, ATA_LBA_HIGH, 0);
	ide_outb (device, ATA_DEV_HD,   ATA_LBA | ATA_DEVICE(device));
	ide_outb (device, ATA_COMMAND,  0xe3);
	udelay (50);
	c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */
#endif
}


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

ulong ide_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
{
	ulong n = 0;
	unsigned char c;
	unsigned char pwrsave=0; /* power save */
#ifdef CONFIG_LBA48
	unsigned char lba48 = 0;

	if (blknr & 0x0000fffff0000000ULL) {
		/* more than 28 bits used, use 48bit mode */
		lba48 = 1;
	}
#endif
	debug("ide_read dev %d start %lX, blocks %lX buffer at %lX\n",
		device, blknr, blkcnt, (ulong)buffer);

	ide_led (DEVICE_LED(device), 1);	/* LED on	*/

	/* Select device
	 */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	c = ide_wait (device, IDE_TIME_OUT);

	if (c & ATA_STAT_BUSY) {
		printf ("IDE read: device %d not ready\n", device);
		goto IDE_READ_E;
	}

	/* first check if the drive is in Powersaving mode, if yes,
	 * increase the timeout value */
	ide_outb (device, ATA_COMMAND,  ATA_CMD_CHK_PWR);
	udelay (50);

	c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */

	if (c & ATA_STAT_BUSY) {
		printf ("IDE read: device %d not ready\n", device);
		goto IDE_READ_E;
	}
	if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) {
		printf ("No Powersaving mode %X\n", c);
	} else {
		c = ide_inb(device,ATA_SECT_CNT);
		debug ("Powersaving %02X\n",c);
		if(c==0)
			pwrsave=1;
	}


	while (blkcnt-- > 0) {

		c = ide_wait (device, IDE_TIME_OUT);

		if (c & ATA_STAT_BUSY) {
			printf ("IDE read: device %d not ready\n", device);
			break;
		}
#ifdef CONFIG_LBA48
		if (lba48) {
			/* write high bits */
			ide_outb (device, ATA_SECT_CNT, 0);
			ide_outb (device, ATA_LBA_LOW,	(blknr >> 24) & 0xFF);
#ifdef CONFIG_SYS_64BIT_LBA
			ide_outb (device, ATA_LBA_MID,	(blknr >> 32) & 0xFF);
			ide_outb (device, ATA_LBA_HIGH, (blknr >> 40) & 0xFF);
#else
			ide_outb (device, ATA_LBA_MID,	0);
			ide_outb (device, ATA_LBA_HIGH, 0);
#endif
		}
#endif
		ide_outb (device, ATA_SECT_CNT, 1);
		ide_outb (device, ATA_LBA_LOW,  (blknr >>  0) & 0xFF);
		ide_outb (device, ATA_LBA_MID,  (blknr >>  8) & 0xFF);
		ide_outb (device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF);

#ifdef CONFIG_LBA48
		if (lba48) {
			ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device) );
			ide_outb (device, ATA_COMMAND, ATA_CMD_READ_EXT);

		} else
#endif
		{
			ide_outb (device, ATA_DEV_HD,   ATA_LBA		|
						    ATA_DEVICE(device)	|
						    ((blknr >> 24) & 0xF) );
			ide_outb (device, ATA_COMMAND,  ATA_CMD_READ);
		}

		udelay (50);

		if(pwrsave) {
			c = ide_wait (device, IDE_SPIN_UP_TIME_OUT);	/* may take up to 4 sec */
			pwrsave=0;
		} else {
			c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */
		}

		if ((c&(ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR)) != ATA_STAT_DRQ) {
#if defined(CONFIG_SYS_64BIT_LBA)
			printf ("Error (no IRQ) dev %d blk %Ld: status 0x%02x\n",
				device, blknr, c);
#else
			printf ("Error (no IRQ) dev %d blk %ld: status 0x%02x\n",
				device, (ulong)blknr, c);
#endif
			break;
		}

		input_data (device, buffer, ATA_SECTORWORDS);
		(void) ide_inb (device, ATA_STATUS);	/* clear IRQ */

		++n;
		++blknr;
		buffer += ATA_BLOCKSIZE;
	}
IDE_READ_E:
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/
	return (n);
}

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


ulong ide_write (int device, lbaint_t blknr, ulong blkcnt, const void *buffer)
{
	ulong n = 0;
	unsigned char c;
#ifdef CONFIG_LBA48
	unsigned char lba48 = 0;

	if (blknr & 0x0000fffff0000000ULL) {
		/* more than 28 bits used, use 48bit mode */
		lba48 = 1;
	}
#endif

	ide_led (DEVICE_LED(device), 1);	/* LED on	*/

	/* Select device
	 */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));

	while (blkcnt-- > 0) {

		c = ide_wait (device, IDE_TIME_OUT);

		if (c & ATA_STAT_BUSY) {
			printf ("IDE read: device %d not ready\n", device);
			goto WR_OUT;
		}
#ifdef CONFIG_LBA48
		if (lba48) {
			/* write high bits */
			ide_outb (device, ATA_SECT_CNT, 0);
			ide_outb (device, ATA_LBA_LOW,	(blknr >> 24) & 0xFF);
#ifdef CONFIG_SYS_64BIT_LBA
			ide_outb (device, ATA_LBA_MID,	(blknr >> 32) & 0xFF);
			ide_outb (device, ATA_LBA_HIGH, (blknr >> 40) & 0xFF);
#else
			ide_outb (device, ATA_LBA_MID,	0);
			ide_outb (device, ATA_LBA_HIGH, 0);
#endif
		}
#endif
		ide_outb (device, ATA_SECT_CNT, 1);
		ide_outb (device, ATA_LBA_LOW,  (blknr >>  0) & 0xFF);
		ide_outb (device, ATA_LBA_MID,  (blknr >>  8) & 0xFF);
		ide_outb (device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF);

#ifdef CONFIG_LBA48
		if (lba48) {
			ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device) );
			ide_outb (device, ATA_COMMAND,	ATA_CMD_WRITE_EXT);

		} else
#endif
		{
			ide_outb (device, ATA_DEV_HD,   ATA_LBA		|
						    ATA_DEVICE(device)	|
						    ((blknr >> 24) & 0xF) );
			ide_outb (device, ATA_COMMAND,  ATA_CMD_WRITE);
		}

		udelay (50);

		c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */

		if ((c&(ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR)) != ATA_STAT_DRQ) {
#if defined(CONFIG_SYS_64BIT_LBA)
			printf ("Error (no IRQ) dev %d blk %Ld: status 0x%02x\n",
				device, blknr, c);
#else
			printf ("Error (no IRQ) dev %d blk %ld: status 0x%02x\n",
				device, (ulong)blknr, c);
#endif
			goto WR_OUT;
		}

		output_data (device, buffer, ATA_SECTORWORDS);
		c = ide_inb (device, ATA_STATUS);	/* clear IRQ */
		++n;
		++blknr;
		buffer += ATA_BLOCKSIZE;
	}
WR_OUT:
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/
	return (n);
}

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

/*
 * copy src to dest, skipping leading and trailing blanks and null
 * terminate the string
 * "len" is the size of available memory including the terminating '\0'
 */
static void ident_cpy (unsigned char *dst, unsigned char *src, unsigned int len)
{
	unsigned char *end, *last;

	last = dst;
	end  = src + len - 1;

	/* reserve space for '\0' */
	if (len < 2)
		goto OUT;

	/* skip leading white space */
	while ((*src) && (src<end) && (*src==' '))
		++src;

	/* copy string, omitting trailing white space */
	while ((*src) && (src<end)) {
		*dst++ = *src;
		if (*src++ != ' ')
			last = dst;
	}
OUT:
	*last = '\0';
}

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

/*
 * Wait until Busy bit is off, or timeout (in ms)
 * Return last status
 */
static uchar ide_wait (int dev, ulong t)
{
	ulong delay = 10 * t;		/* poll every 100 us */
	uchar c;

	while ((c = ide_inb(dev, ATA_STATUS)) & ATA_STAT_BUSY) {
		udelay (100);
		if (delay-- == 0) {
			break;
		}
	}
	return (c);
}

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

#ifdef CONFIG_IDE_RESET
extern void ide_set_reset(int idereset);

static void ide_reset (void)
{
#if defined(CONFIG_SYS_PB_12V_ENABLE) || defined(CONFIG_SYS_PB_IDE_MOTOR)
	volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
#endif
	int i;

	curr_device = -1;
	for (i=0; i<CONFIG_SYS_IDE_MAXBUS; ++i)
		ide_bus_ok[i] = 0;
	for (i=0; i<CONFIG_SYS_IDE_MAXDEVICE; ++i)
		ide_dev_desc[i].type = DEV_TYPE_UNKNOWN;

	ide_set_reset (1); /* assert reset */

	/* the reset signal shall be asserted for et least 25 us */
	udelay(25);

	WATCHDOG_RESET();

#ifdef CONFIG_SYS_PB_12V_ENABLE
	immr->im_cpm.cp_pbdat &= ~(CONFIG_SYS_PB_12V_ENABLE);	/* 12V Enable output OFF */
	immr->im_cpm.cp_pbpar &= ~(CONFIG_SYS_PB_12V_ENABLE);
	immr->im_cpm.cp_pbodr &= ~(CONFIG_SYS_PB_12V_ENABLE);
	immr->im_cpm.cp_pbdir |=   CONFIG_SYS_PB_12V_ENABLE;

	/* wait 500 ms for the voltage to stabilize
	 */
	for (i=0; i<500; ++i) {
		udelay (1000);
	}

	immr->im_cpm.cp_pbdat |=   CONFIG_SYS_PB_12V_ENABLE;	/* 12V Enable output ON */
#endif	/* CONFIG_SYS_PB_12V_ENABLE */

#ifdef CONFIG_SYS_PB_IDE_MOTOR
	/* configure IDE Motor voltage monitor pin as input */
	immr->im_cpm.cp_pbpar &= ~(CONFIG_SYS_PB_IDE_MOTOR);
	immr->im_cpm.cp_pbodr &= ~(CONFIG_SYS_PB_IDE_MOTOR);
	immr->im_cpm.cp_pbdir &= ~(CONFIG_SYS_PB_IDE_MOTOR);

	/* wait up to 1 s for the motor voltage to stabilize
	 */
	for (i=0; i<1000; ++i) {
		if ((immr->im_cpm.cp_pbdat & CONFIG_SYS_PB_IDE_MOTOR) != 0) {
			break;
		}
		udelay (1000);
	}

	if (i == 1000) {	/* Timeout */
		printf ("\nWarning: 5V for IDE Motor missing\n");
# ifdef CONFIG_STATUS_LED
#  ifdef STATUS_LED_YELLOW
		status_led_set  (STATUS_LED_YELLOW, STATUS_LED_ON );
#  endif
#  ifdef STATUS_LED_GREEN
		status_led_set  (STATUS_LED_GREEN,  STATUS_LED_OFF);
#  endif
# endif	/* CONFIG_STATUS_LED */
	}
#endif	/* CONFIG_SYS_PB_IDE_MOTOR */

	WATCHDOG_RESET();

	/* de-assert RESET signal */
	ide_set_reset(0);

	/* wait 250 ms */
	for (i=0; i<250; ++i) {
		udelay (1000);
	}
}

#endif	/* CONFIG_IDE_RESET */

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

#if defined(CONFIG_IDE_LED)	&& \
   !defined(CONFIG_CPC45)	&& \
   !defined(CONFIG_KUP4K)	&& \
   !defined(CONFIG_KUP4X)

static	uchar	led_buffer = 0;		/* Buffer for current LED status	*/

static void ide_led (uchar led, uchar status)
{
	uchar *led_port = LED_PORT;

	if (status)	{		/* switch LED on	*/
		led_buffer |=  led;
	} else {			/* switch LED off	*/
		led_buffer &= ~led;
	}

	*led_port = led_buffer;
}

#endif	/* CONFIG_IDE_LED */

#if defined(CONFIG_OF_IDE_FIXUP)
int ide_device_present(int dev)
{
	if (dev >= CONFIG_SYS_IDE_MAXBUS)
		return 0;
	return (ide_dev_desc[dev].type == DEV_TYPE_UNKNOWN ? 0 : 1);
}
#endif
/* ------------------------------------------------------------------------- */

#ifdef CONFIG_ATAPI
/****************************************************************************
 * ATAPI Support
 */

#if defined(CONFIG_IDE_SWAP_IO)
/* since ATAPI may use commands with not 4 bytes alligned length
 * we have our own transfer functions, 2 bytes alligned */
static void
output_data_shorts(int dev, ushort *sect_buf, int shorts)
{
#if defined(CONFIG_CPC45)
	uchar	*dbuf;
	volatile uchar	*pbuf_even;
	volatile uchar	*pbuf_odd;

	pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	while (shorts--) {
		EIEIO;
		*pbuf_even = *dbuf++;
		EIEIO;
		*pbuf_odd = *dbuf++;
	}
#else
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;

	debug ("in output data shorts base for read is %lx\n", (unsigned long) pbuf);

	while (shorts--) {
		EIEIO;
		*pbuf = *dbuf++;
	}
#endif
}

static void
input_data_shorts(int dev, ushort *sect_buf, int shorts)
{
#if defined(CONFIG_CPC45)
	uchar	*dbuf;
	volatile uchar	*pbuf_even;
	volatile uchar	*pbuf_odd;

	pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	while (shorts--) {
		EIEIO;
		*dbuf++ = *pbuf_even;
		EIEIO;
		*dbuf++ = *pbuf_odd;
	}
#else
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;

	debug("in input data shorts base for read is %lx\n", (unsigned long) pbuf);

	while (shorts--) {
		EIEIO;
		*dbuf++ = *pbuf;
	}
#endif
}

#else	/* ! CONFIG_IDE_SWAP_IO */
static void
output_data_shorts(int dev, ushort *sect_buf, int shorts)
{
	outsw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, shorts);
}

static void
input_data_shorts(int dev, ushort *sect_buf, int shorts)
{
	insw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, shorts);
}

#endif	/* CONFIG_IDE_SWAP_IO */

/*
 * Wait until (Status & mask) == res, or timeout (in ms)
 * Return last status
 * This is used since some ATAPI CD ROMs clears their Busy Bit first
 * and then they set their DRQ Bit
 */
static uchar atapi_wait_mask (int dev, ulong t,uchar mask, uchar res)
{
	ulong delay = 10 * t;		/* poll every 100 us */
	uchar c;

	c = ide_inb(dev,ATA_DEV_CTL); /* prevents to read the status before valid */
	while (((c = ide_inb(dev, ATA_STATUS)) & mask) != res) {
		/* break if error occurs (doesn't make sense to wait more) */
		if((c & ATA_STAT_ERR)==ATA_STAT_ERR)
			break;
		udelay (100);
		if (delay-- == 0) {
			break;
		}
	}
	return (c);
}

/*
 * issue an atapi command
 */
unsigned char atapi_issue(int device,unsigned char* ccb,int ccblen, unsigned char * buffer,int buflen)
{
	unsigned char c,err,mask,res;
	int n;
	ide_led (DEVICE_LED(device), 1);	/* LED on	*/

	/* Select device
	 */
	mask = ATA_STAT_BUSY|ATA_STAT_DRQ;
	res = 0;
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);
	if ((c & mask) != res) {
		printf ("ATAPI_ISSUE: device %d not ready status %X\n", device,c);
		err=0xFF;
		goto AI_OUT;
	}
	/* write taskfile */
	ide_outb (device, ATA_ERROR_REG, 0); /* no DMA, no overlaped */
	ide_outb (device, ATA_SECT_CNT, 0);
	ide_outb (device, ATA_SECT_NUM, 0);
	ide_outb (device, ATA_CYL_LOW,  (unsigned char)(buflen & 0xFF));
	ide_outb (device, ATA_CYL_HIGH, (unsigned char)((buflen>>8) & 0xFF));
	ide_outb (device, ATA_DEV_HD,   ATA_LBA | ATA_DEVICE(device));

	ide_outb (device, ATA_COMMAND,  ATAPI_CMD_PACKET);
	udelay (50);

	mask = ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR;
	res = ATA_STAT_DRQ;
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);

	if ((c & mask) != res) { /* DRQ must be 1, BSY 0 */
		printf ("ATAPI_ISSUE: Error (no IRQ) before sending ccb dev %d status 0x%02x\n",device,c);
		err=0xFF;
		goto AI_OUT;
	}

	output_data_shorts (device, (unsigned short *)ccb,ccblen/2); /* write command block */
	/* ATAPI Command written wait for completition */
	udelay (5000); /* device must set bsy */

	mask = ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR;
	/* if no data wait for DRQ = 0 BSY = 0
	 * if data wait for DRQ = 1 BSY = 0 */
	res=0;
	if(buflen)
		res = ATA_STAT_DRQ;
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);
	if ((c & mask) != res ) {
		if (c & ATA_STAT_ERR) {
			err=(ide_inb(device,ATA_ERROR_REG))>>4;
			debug ("atapi_issue 1 returned sense key %X status %02X\n",err,c);
		} else {
			printf ("ATAPI_ISSUE: (no DRQ) after sending ccb (%x)  status 0x%02x\n", ccb[0],c);
			err=0xFF;
		}
		goto AI_OUT;
	}
	n=ide_inb(device, ATA_CYL_HIGH);
	n<<=8;
	n+=ide_inb(device, ATA_CYL_LOW);
	if(n>buflen) {
		printf("ERROR, transfer bytes %d requested only %d\n",n,buflen);
		err=0xff;
		goto AI_OUT;
	}
	if((n==0)&&(buflen<0)) {
		printf("ERROR, transfer bytes %d requested %d\n",n,buflen);
		err=0xff;
		goto AI_OUT;
	}
	if(n!=buflen) {
		debug ("WARNING, transfer bytes %d not equal with requested %d\n",n,buflen);
	}
	if(n!=0) { /* data transfer */
		debug ("ATAPI_ISSUE: %d Bytes to transfer\n",n);
		 /* we transfer shorts */
		n>>=1;
		/* ok now decide if it is an in or output */
		if ((ide_inb(device, ATA_SECT_CNT)&0x02)==0) {
			debug ("Write to device\n");
			output_data_shorts(device,(unsigned short *)buffer,n);
		} else {
			debug ("Read from device @ %p shorts %d\n",buffer,n);
			input_data_shorts(device,(unsigned short *)buffer,n);
		}
	}
	udelay(5000); /* seems that some CD ROMs need this... */
	mask = ATA_STAT_BUSY|ATA_STAT_ERR;
	res=0;
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);
	if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) {
		err=(ide_inb(device,ATA_ERROR_REG) >> 4);
		debug ("atapi_issue 2 returned sense key %X status %X\n",err,c);
	} else {
		err = 0;
	}
AI_OUT:
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/
	return (err);
}

/*
 * sending the command to atapi_issue. If an status other than good
 * returns, an request_sense will be issued
 */

#define ATAPI_DRIVE_NOT_READY	100
#define ATAPI_UNIT_ATTN		10

unsigned char atapi_issue_autoreq (int device,
				   unsigned char* ccb,
				   int ccblen,
				   unsigned char *buffer,
				   int buflen)
{
	unsigned char sense_data[18],sense_ccb[12];
	unsigned char res,key,asc,ascq;
	int notready,unitattn;

	unitattn=ATAPI_UNIT_ATTN;
	notready=ATAPI_DRIVE_NOT_READY;

retry:
	res= atapi_issue(device,ccb,ccblen,buffer,buflen);
	if (res==0)
		return (0); /* Ok */

	if (res==0xFF)
		return (0xFF); /* error */

	debug ("(auto_req)atapi_issue returned sense key %X\n",res);

	memset(sense_ccb,0,sizeof(sense_ccb));
	memset(sense_data,0,sizeof(sense_data));
	sense_ccb[0]=ATAPI_CMD_REQ_SENSE;
	sense_ccb[4]=18; /* allocation Length */

	res=atapi_issue(device,sense_ccb,12,sense_data,18);
	key=(sense_data[2]&0xF);
	asc=(sense_data[12]);
	ascq=(sense_data[13]);

	debug ("ATAPI_CMD_REQ_SENSE returned %x\n",res);
	debug (" Sense page: %02X key %02X ASC %02X ASCQ %02X\n",
		sense_data[0],
		key,
		asc,
		ascq);

	if((key==0))
		return 0; /* ok device ready */

	if((key==6)|| (asc==0x29) || (asc==0x28)) { /* Unit Attention */
		if(unitattn-->0) {
			udelay(200*1000);
			goto retry;
		}
		printf("Unit Attention, tried %d\n",ATAPI_UNIT_ATTN);
		goto error;
	}
	if((asc==0x4) && (ascq==0x1)) { /* not ready, but will be ready soon */
		if (notready-->0) {
			udelay(200*1000);
			goto retry;
		}
		printf("Drive not ready, tried %d times\n",ATAPI_DRIVE_NOT_READY);
		goto error;
	}
	if(asc==0x3a) {
		debug ("Media not present\n");
		goto error;
	}

	printf ("ERROR: Unknown Sense key %02X ASC %02X ASCQ %02X\n",key,asc,ascq);
error:
	debug  ("ERROR Sense key %02X ASC %02X ASCQ %02X\n",key,asc,ascq);
	return (0xFF);
}


static void	atapi_inquiry(block_dev_desc_t * dev_desc)
{
	unsigned char ccb[12]; /* Command descriptor block */
	unsigned char iobuf[64]; /* temp buf */
	unsigned char c;
	int device;

	device=dev_desc->dev;
	dev_desc->type=DEV_TYPE_UNKNOWN; /* not yet valid */
	dev_desc->block_read=atapi_read;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));

	ccb[0]=ATAPI_CMD_INQUIRY;
	ccb[4]=40; /* allocation Legnth */
	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,40);

	debug ("ATAPI_CMD_INQUIRY returned %x\n",c);
	if (c!=0)
		return;

	/* copy device ident strings */
	ident_cpy((unsigned char*)dev_desc->vendor,&iobuf[8],8);
	ident_cpy((unsigned char*)dev_desc->product,&iobuf[16],16);
	ident_cpy((unsigned char*)dev_desc->revision,&iobuf[32],5);

	dev_desc->lun=0;
	dev_desc->lba=0;
	dev_desc->blksz=0;
	dev_desc->type=iobuf[0] & 0x1f;

	if ((iobuf[1]&0x80)==0x80)
		dev_desc->removable = 1;
	else
		dev_desc->removable = 0;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));
	ccb[0]=ATAPI_CMD_START_STOP;
	ccb[4]=0x03; /* start */

	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,0);

	debug ("ATAPI_CMD_START_STOP returned %x\n",c);
	if (c!=0)
		return;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));
	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,0);

	debug ("ATAPI_CMD_UNIT_TEST_READY returned %x\n",c);
	if (c!=0)
		return;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));
	ccb[0]=ATAPI_CMD_READ_CAP;
	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,8);
	debug ("ATAPI_CMD_READ_CAP returned %x\n",c);
	if (c!=0)
		return;

	debug ("Read Cap: LBA %02X%02X%02X%02X blksize %02X%02X%02X%02X\n",
		iobuf[0],iobuf[1],iobuf[2],iobuf[3],
		iobuf[4],iobuf[5],iobuf[6],iobuf[7]);

	dev_desc->lba  =((unsigned long)iobuf[0]<<24) +
			((unsigned long)iobuf[1]<<16) +
			((unsigned long)iobuf[2]<< 8) +
			((unsigned long)iobuf[3]);
	dev_desc->blksz=((unsigned long)iobuf[4]<<24) +
			((unsigned long)iobuf[5]<<16) +
			((unsigned long)iobuf[6]<< 8) +
			((unsigned long)iobuf[7]);
#ifdef CONFIG_LBA48
	dev_desc->lba48 = 0; /* ATAPI devices cannot use 48bit addressing (ATA/ATAPI v7) */
#endif
	return;
}


/*
 * atapi_read:
 * we transfer only one block per command, since the multiple DRQ per
 * command is not yet implemented
 */
#define ATAPI_READ_MAX_BYTES	2048	/* we read max 2kbytes */
#define ATAPI_READ_BLOCK_SIZE	2048	/* assuming CD part */
#define ATAPI_READ_MAX_BLOCK ATAPI_READ_MAX_BYTES/ATAPI_READ_BLOCK_SIZE	/* max blocks */

ulong atapi_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
{
	ulong n = 0;
	unsigned char ccb[12]; /* Command descriptor block */
	ulong cnt;

	debug  ("atapi_read dev %d start %lX, blocks %lX buffer at %lX\n",
		device, blknr, blkcnt, (ulong)buffer);

	do {
		if (blkcnt>ATAPI_READ_MAX_BLOCK) {
			cnt=ATAPI_READ_MAX_BLOCK;
		} else {
			cnt=blkcnt;
		}
		ccb[0]=ATAPI_CMD_READ_12;
		ccb[1]=0; /* reserved */
		ccb[2]=(unsigned char) (blknr>>24) & 0xFF; /* MSB Block */
		ccb[3]=(unsigned char) (blknr>>16) & 0xFF; /*  */
		ccb[4]=(unsigned char) (blknr>> 8) & 0xFF;
		ccb[5]=(unsigned char)  blknr      & 0xFF; /* LSB Block */
		ccb[6]=(unsigned char) (cnt  >>24) & 0xFF; /* MSB Block count */
		ccb[7]=(unsigned char) (cnt  >>16) & 0xFF;
		ccb[8]=(unsigned char) (cnt  >> 8) & 0xFF;
		ccb[9]=(unsigned char)  cnt	   & 0xFF; /* LSB Block */
		ccb[10]=0; /* reserved */
		ccb[11]=0; /* reserved */