[deliverable/linux.git] / drivers / ide / ide-lib.c

#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/blkpg.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/bitops.h>

#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>

static const char *udma_str[] =
	 { "UDMA/16", "UDMA/25",  "UDMA/33",  "UDMA/44",
	   "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
static const char *mwdma_str[] =
	{ "MWDMA0", "MWDMA1", "MWDMA2" };
static const char *swdma_str[] =
	{ "SWDMA0", "SWDMA1", "SWDMA2" };
static const char *pio_str[] =
	{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };

/**
 *	ide_xfer_verbose	-	return IDE mode names
 *	@mode: transfer mode
 *
 *	Returns a constant string giving the name of the mode
 *	requested.
 */

const char *ide_xfer_verbose(u8 mode)
{
	const char *s;
	u8 i = mode & 0xf;

	if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
		s = udma_str[i];
	else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
		s = mwdma_str[i];
	else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
		s = swdma_str[i];
	else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
		s = pio_str[i & 0x7];
	else if (mode == XFER_PIO_SLOW)
		s = "PIO SLOW";
	else
		s = "XFER ERROR";

	return s;
}

EXPORT_SYMBOL(ide_xfer_verbose);

/**
 *	ide_rate_filter		-	filter transfer mode
 *	@drive: IDE device
 *	@speed: desired speed
 *
 *	Given the available transfer modes this function returns
 *	the best available speed at or below the speed requested.
 *
 *	TODO: check device PIO capabilities
 */

static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
{
	ide_hwif_t *hwif = drive->hwif;
	u8 mode = ide_find_dma_mode(drive, speed);

	if (mode == 0) {
		if (hwif->pio_mask)
			mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
		else
			mode = XFER_PIO_4;
	}

/*	printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */

	return min(speed, mode);
}

/*
 * Standard (generic) timings for PIO modes, from ATA2 specification.
 * These timings are for access to the IDE data port register *only*.
 * Some drives may specify a mode, while also specifying a different
 * value for cycle_time (from drive identification data).
 */
const ide_pio_timings_t ide_pio_timings[6] = {
	{ 70,	165,	600 },	/* PIO Mode 0 */
	{ 50,	125,	383 },	/* PIO Mode 1 */
	{ 30,	100,	240 },	/* PIO Mode 2 */
	{ 30,	80,	180 },	/* PIO Mode 3 with IORDY */
	{ 25,	70,	120 },	/* PIO Mode 4 with IORDY */
	{ 20,	50,	100 }	/* PIO Mode 5 with IORDY (nonstandard) */
};

EXPORT_SYMBOL_GPL(ide_pio_timings);

/*
 * Shared data/functions for determining best PIO mode for an IDE drive.
 * Most of this stuff originally lived in cmd640.c, and changes to the
 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
 * breaking the fragile cmd640.c support.
 */

/*
 * Black list. Some drives incorrectly report their maximal PIO mode,
 * at least in respect to CMD640. Here we keep info on some known drives.
 */
static struct ide_pio_info {
	const char	*name;
	int		pio;
} ide_pio_blacklist [] = {
	{ "Conner Peripherals 540MB - CFS540A", 3 },

	{ "WDC AC2700",  3 },
	{ "WDC AC2540",  3 },
	{ "WDC AC2420",  3 },
	{ "WDC AC2340",  3 },
	{ "WDC AC2250",  0 },
	{ "WDC AC2200",  0 },
	{ "WDC AC21200", 4 },
	{ "WDC AC2120",  0 },
	{ "WDC AC2850",  3 },
	{ "WDC AC1270",  3 },
	{ "WDC AC1170",  1 },
	{ "WDC AC1210",  1 },
	{ "WDC AC280",   0 },
	{ "WDC AC31000", 3 },
	{ "WDC AC31200", 3 },

	{ "Maxtor 7131 AT", 1 },
	{ "Maxtor 7171 AT", 1 },
	{ "Maxtor 7213 AT", 1 },
	{ "Maxtor 7245 AT", 1 },
	{ "Maxtor 7345 AT", 1 },
	{ "Maxtor 7546 AT", 3 },
	{ "Maxtor 7540 AV", 3 },

	{ "SAMSUNG SHD-3121A", 1 },
	{ "SAMSUNG SHD-3122A", 1 },
	{ "SAMSUNG SHD-3172A", 1 },

	{ "ST5660A",  3 },
	{ "ST3660A",  3 },
	{ "ST3630A",  3 },
	{ "ST3655A",  3 },
	{ "ST3391A",  3 },
	{ "ST3390A",  1 },
	{ "ST3600A",  1 },
	{ "ST3290A",  0 },
	{ "ST3144A",  0 },
	{ "ST3491A",  1 },	/* reports 3, should be 1 or 2 (depending on */	
				/* drive) according to Seagates FIND-ATA program */

	{ "QUANTUM ELS127A", 0 },
	{ "QUANTUM ELS170A", 0 },
	{ "QUANTUM LPS240A", 0 },
	{ "QUANTUM LPS210A", 3 },
	{ "QUANTUM LPS270A", 3 },
	{ "QUANTUM LPS365A", 3 },
	{ "QUANTUM LPS540A", 3 },
	{ "QUANTUM LIGHTNING 540A", 3 },
	{ "QUANTUM LIGHTNING 730A", 3 },

        { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
        { "QUANTUM FIREBALL_640", 3 }, 
        { "QUANTUM FIREBALL_1080", 3 },
        { "QUANTUM FIREBALL_1280", 3 },
	{ NULL,	0 }
};

/**
 *	ide_scan_pio_blacklist 	-	check for a blacklisted drive
 *	@model: Drive model string
 *
 *	This routine searches the ide_pio_blacklist for an entry
 *	matching the start/whole of the supplied model name.
 *
 *	Returns -1 if no match found.
 *	Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
 */

static int ide_scan_pio_blacklist (char *model)
{
	struct ide_pio_info *p;

	for (p = ide_pio_blacklist; p->name != NULL; p++) {
		if (strncmp(p->name, model, strlen(p->name)) == 0)
			return p->pio;
	}
	return -1;
}

unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
{
	struct hd_driveid *id = drive->id;
	int cycle_time = 0;

	if (id->field_valid & 2) {
		if (id->capability & 8)
			cycle_time = id->eide_pio_iordy;
		else
			cycle_time = id->eide_pio;
	}

	/* conservative "downgrade" for all pre-ATA2 drives */
	if (pio < 3) {
		if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
			cycle_time = 0; /* use standard timing */
	}

	return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
}

EXPORT_SYMBOL_GPL(ide_pio_cycle_time);

/**
 *	ide_get_best_pio_mode	-	get PIO mode from drive
 *	@drive: drive to consider
 *	@mode_wanted: preferred mode
 *	@max_mode: highest allowed mode
 *
 *	This routine returns the recommended PIO settings for a given drive,
 *	based on the drive->id information and the ide_pio_blacklist[].
 *
 *	Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
 *	This is used by most chipset support modules when "auto-tuning".
 */

u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
{
	int pio_mode;
	struct hd_driveid* id = drive->id;
	int overridden  = 0;

	if (mode_wanted != 255)
		return min_t(u8, mode_wanted, max_mode);

	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
	    (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
		printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
	} else {
		pio_mode = id->tPIO;
		if (pio_mode > 2) {	/* 2 is maximum allowed tPIO value */
			pio_mode = 2;
			overridden = 1;
		}
		if (id->field_valid & 2) {	  /* drive implements ATA2? */
			if (id->capability & 8) { /* IORDY supported? */
				if (id->eide_pio_modes & 7) {
					overridden = 0;
					if (id->eide_pio_modes & 4)
						pio_mode = 5;
					else if (id->eide_pio_modes & 2)
						pio_mode = 4;
					else
						pio_mode = 3;
				}
			}
		}

		if (overridden)
			printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
					 drive->name);
	}

	if (pio_mode > max_mode)
		pio_mode = max_mode;

	return pio_mode;
}

EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);

/* req_pio == "255" for auto-tune */
void ide_set_pio(ide_drive_t *drive, u8 req_pio)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;
	u8 host_pio, pio;

	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
		return;

	BUG_ON(hwif->pio_mask == 0x00);

	host_pio = fls(hwif->pio_mask) - 1;

	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);

	/*
	 * TODO:
	 * - report device max PIO mode
	 * - check req_pio != 255 against device max PIO mode
	 */
	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
			  drive->name, host_pio, req_pio,
			  req_pio == 255 ? "(auto-tune)" : "", pio);

	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
}

EXPORT_SYMBOL_GPL(ide_set_pio);

/**
 *	ide_toggle_bounce	-	handle bounce buffering
 *	@drive: drive to update
 *	@on: on/off boolean
 *
 *	Enable or disable bounce buffering for the device. Drives move
 *	between PIO and DMA and that changes the rules we need.
 */
 
void ide_toggle_bounce(ide_drive_t *drive, int on)
{
	u64 addr = BLK_BOUNCE_HIGH;	/* dma64_addr_t */

	if (!PCI_DMA_BUS_IS_PHYS) {
		addr = BLK_BOUNCE_ANY;
	} else if (on && drive->media == ide_disk) {
		struct device *dev = drive->hwif->dev;

		if (dev && dev->dma_mask)
			addr = *dev->dma_mask;
	}

	if (drive->queue)
		blk_queue_bounce_limit(drive->queue, addr);
}

int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
		return 0;

	if (port_ops == NULL || port_ops->set_pio_mode == NULL)
		return -1;

	/*
	 * TODO: temporary hack for some legacy host drivers that didn't
	 * set transfer mode on the device in ->set_pio_mode method...
	 */
	if (port_ops->set_dma_mode == NULL) {
		port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
		return 0;
	}

	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
		if (ide_config_drive_speed(drive, mode))
			return -1;
		port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
		return 0;
	} else {
		port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
		return ide_config_drive_speed(drive, mode);
	}
}

int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
		return 0;

	if (port_ops == NULL || port_ops->set_dma_mode == NULL)
		return -1;

	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
		if (ide_config_drive_speed(drive, mode))
			return -1;
		port_ops->set_dma_mode(drive, mode);
		return 0;
	} else {
		port_ops->set_dma_mode(drive, mode);
		return ide_config_drive_speed(drive, mode);
	}
}

EXPORT_SYMBOL_GPL(ide_set_dma_mode);

/**
 *	ide_set_xfer_rate	-	set transfer rate
 *	@drive: drive to set
 *	@rate: speed to attempt to set
 *	
 *	General helper for setting the speed of an IDE device. This
 *	function knows about user enforced limits from the configuration
 *	which ->set_pio_mode/->set_dma_mode does not.
 */

int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_port_ops *port_ops = hwif->port_ops;

	if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
		return -1;

	rate = ide_rate_filter(drive, rate);

	if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
		return ide_set_pio_mode(drive, rate);

	/*
	 * TODO: transfer modes 0x00-0x07 passed from the user-space are
	 * currently handled here which needs fixing (please note that such
	 * case could happen iff the transfer mode has already been set on
	 * the device by ide-proc.c::set_xfer_rate()).
	 */
	if (rate < XFER_PIO_0) {
		if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
			return ide_set_dma_mode(drive, rate);
		else
			return ide_config_drive_speed(drive, rate);
	}

	return ide_set_dma_mode(drive, rate);
}

static void ide_dump_opcode(ide_drive_t *drive)
{
	struct request *rq;
	ide_task_t *task = NULL;

	spin_lock(&ide_lock);
	rq = NULL;
	if (HWGROUP(drive))
		rq = HWGROUP(drive)->rq;
	spin_unlock(&ide_lock);
	if (!rq)
		return;

	if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
		task = rq->special;

	printk("ide: failed opcode was: ");
	if (task == NULL)
		printk(KERN_CONT "unknown\n");
	else
		printk(KERN_CONT "0x%02x\n", task->tf.command);
}

u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
{
	u32 high, low;

	if (lba48)
		high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
			tf->hob_lbal;
	else
		high = tf->device & 0xf;
	low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;

	return ((u64)high << 24) | low;
}
EXPORT_SYMBOL_GPL(ide_get_lba_addr);

static void ide_dump_sector(ide_drive_t *drive)
{
	ide_task_t task;
	struct ide_taskfile *tf = &task.tf;
	int lba48 = (drive->addressing == 1) ? 1 : 0;

	memset(&task, 0, sizeof(task));
	if (lba48)
		task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
				IDE_TFLAG_LBA48;
	else
		task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;

	drive->hwif->tf_read(drive, &task);

	if (lba48 || (tf->device & ATA_LBA))
		printk(", LBAsect=%llu",
			(unsigned long long)ide_get_lba_addr(tf, lba48));
	else
		printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
					 tf->device & 0xf, tf->lbal);
}

static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
{
	printk("{ ");
	if (err & ABRT_ERR)	printk("DriveStatusError ");
	if (err & ICRC_ERR)
		printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
	if (err & ECC_ERR)	printk("UncorrectableError ");
	if (err & ID_ERR)	printk("SectorIdNotFound ");
	if (err & TRK0_ERR)	printk("TrackZeroNotFound ");
	if (err & MARK_ERR)	printk("AddrMarkNotFound ");
	printk("}");
	if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
	    (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
		ide_dump_sector(drive);
		if (HWGROUP(drive) && HWGROUP(drive)->rq)
			printk(", sector=%llu",
			       (unsigned long long)HWGROUP(drive)->rq->sector);
	}
	printk("\n");
}

static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
{
	printk("{ ");
	if (err & ILI_ERR)	printk("IllegalLengthIndication ");
	if (err & EOM_ERR)	printk("EndOfMedia ");
	if (err & ABRT_ERR)	printk("AbortedCommand ");
	if (err & MCR_ERR)	printk("MediaChangeRequested ");
	if (err & LFS_ERR)	printk("LastFailedSense=0x%02x ",
				       (err & LFS_ERR) >> 4);
	printk("}\n");
}

/**
 *	ide_dump_status		-	translate ATA/ATAPI error
 *	@drive: drive that status applies to
 *	@msg: text message to print
 *	@stat: status byte to decode
 *
 *	Error reporting, in human readable form (luxurious, but a memory hog).
 *	Combines the drive name, message and status byte to provide a
 *	user understandable explanation of the device error.
 */

u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
{
	unsigned long flags;
	u8 err = 0;

	local_irq_save(flags);
	printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
	if (stat & BUSY_STAT)
		printk("Busy ");
	else {
		if (stat & READY_STAT)	printk("DriveReady ");
		if (stat & WRERR_STAT)	printk("DeviceFault ");
		if (stat & SEEK_STAT)	printk("SeekComplete ");
		if (stat & DRQ_STAT)	printk("DataRequest ");
		if (stat & ECC_STAT)	printk("CorrectedError ");
		if (stat & INDEX_STAT)	printk("Index ");
		if (stat & ERR_STAT)	printk("Error ");
	}
	printk("}\n");
	if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
		err = ide_read_error(drive);
		printk("%s: %s: error=0x%02x ", drive->name, msg, err);
		if (drive->media == ide_disk)
			ide_dump_ata_error(drive, err);
		else
			ide_dump_atapi_error(drive, err);
	}
	ide_dump_opcode(drive);
	local_irq_restore(flags);
	return err;
}

EXPORT_SYMBOL(ide_dump_status);
Commit	Line	Data
1da177e4 LT	1	#include <linux/module.h>
	2	#include <linux/types.h>
	3	#include <linux/string.h>
	4	#include <linux/kernel.h>
	5	#include <linux/timer.h>
	6	#include <linux/mm.h>
	7	#include <linux/interrupt.h>
	8	#include <linux/major.h>
	9	#include <linux/errno.h>
	10	#include <linux/genhd.h>
	11	#include <linux/blkpg.h>
	12	#include <linux/slab.h>
	13	#include <linux/pci.h>
	14	#include <linux/delay.h>
	15	#include <linux/hdreg.h>
	16	#include <linux/ide.h>
	17	#include <linux/bitops.h>
	18
	19	#include <asm/byteorder.h>
	20	#include <asm/irq.h>
	21	#include <asm/uaccess.h>
	22	#include <asm/io.h>
	23
3ab7efe8 BZ	24	static const char *udma_str[] =
	25	{ "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
	26	"UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
	27	static const char *mwdma_str[] =
	28	{ "MWDMA0", "MWDMA1", "MWDMA2" };
	29	static const char *swdma_str[] =
	30	{ "SWDMA0", "SWDMA1", "SWDMA2" };
	31	static const char *pio_str[] =
	32	{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
1da177e4 LT	33
	34	/**
	35	* ide_xfer_verbose - return IDE mode names
3ab7efe8	36	* @mode: transfer mode
1da177e4 LT	37	*
	38	* Returns a constant string giving the name of the mode
	39	* requested.
	40	*/
	41
3ab7efe8	42	const char *ide_xfer_verbose(u8 mode)
1da177e4	43	{
3ab7efe8 BZ	44	const char *s;
	45	u8 i = mode & 0xf;
	46
	47	if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
	48	s = udma_str[i];
	49	else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
	50	s = mwdma_str[i];
	51	else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
	52	s = swdma_str[i];
	53	else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
	54	s = pio_str[i & 0x7];
	55	else if (mode == XFER_PIO_SLOW)
	56	s = "PIO SLOW";
	57	else
	58	s = "XFER ERROR";
	59
	60	return s;
1da177e4 LT	61	}
	62
	63	EXPORT_SYMBOL(ide_xfer_verbose);
	64
	65	/**
2d5eaa6d BZ	66	* ide_rate_filter - filter transfer mode
2d5eaa6d BZ	67	* @drive: IDE device
1da177e4 LT	68	* @speed: desired speed
1da177e4 LT	69	*
2d5eaa6d	70	* Given the available transfer modes this function returns
1da177e4	71	* the best available speed at or below the speed requested.
2d5eaa6d	72	*
7670df73	73	* TODO: check device PIO capabilities
1da177e4 LT	74	*/
1da177e4 LT	75
f212ff28	76	static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
1da177e4	77	{
2d5eaa6d	78	ide_hwif_t *hwif = drive->hwif;
7670df73	79	u8 mode = ide_find_dma_mode(drive, speed);
2d5eaa6d	80
7670df73 BZ	81	if (mode == 0) {
	82	if (hwif->pio_mask)
	83	mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
	84	else
	85	mode = XFER_PIO_4;
	86	}
1da177e4	87
eb63963a	88	/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
1da177e4	89
2d5eaa6d	90	return min(speed, mode);
1da177e4 LT	91	}
1da177e4 LT	92
1da177e4 LT	93	/*
	94	* Standard (generic) timings for PIO modes, from ATA2 specification.
	95	* These timings are for access to the IDE data port register only.
	96	* Some drives may specify a mode, while also specifying a different
	97	* value for cycle_time (from drive identification data).
	98	*/
	99	const ide_pio_timings_t ide_pio_timings[6] = {
	100	{ 70, 165, 600 }, /* PIO Mode 0 */
	101	{ 50, 125, 383 }, /* PIO Mode 1 */
	102	{ 30, 100, 240 }, /* PIO Mode 2 */
	103	{ 30, 80, 180 }, /* PIO Mode 3 with IORDY */
	104	{ 25, 70, 120 }, /* PIO Mode 4 with IORDY */
	105	{ 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
	106	};
	107
	108	EXPORT_SYMBOL_GPL(ide_pio_timings);
	109
	110	/*
	111	* Shared data/functions for determining best PIO mode for an IDE drive.
	112	* Most of this stuff originally lived in cmd640.c, and changes to the
	113	* ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
	114	* breaking the fragile cmd640.c support.
	115	*/
	116
	117	/*
	118	* Black list. Some drives incorrectly report their maximal PIO mode,
	119	* at least in respect to CMD640. Here we keep info on some known drives.
	120	*/
	121	static struct ide_pio_info {
	122	const char *name;
	123	int pio;
	124	} ide_pio_blacklist [] = {
1da177e4 LT	125	{ "Conner Peripherals 540MB - CFS540A", 3 },
	126
	127	{ "WDC AC2700", 3 },
	128	{ "WDC AC2540", 3 },
	129	{ "WDC AC2420", 3 },
	130	{ "WDC AC2340", 3 },
	131	{ "WDC AC2250", 0 },
	132	{ "WDC AC2200", 0 },
	133	{ "WDC AC21200", 4 },
	134	{ "WDC AC2120", 0 },
	135	{ "WDC AC2850", 3 },
	136	{ "WDC AC1270", 3 },
	137	{ "WDC AC1170", 1 },
	138	{ "WDC AC1210", 1 },
	139	{ "WDC AC280", 0 },
1da177e4 LT	140	{ "WDC AC31000", 3 },
1da177e4 LT	141	{ "WDC AC31200", 3 },
1da177e4 LT	142
	143	{ "Maxtor 7131 AT", 1 },
	144	{ "Maxtor 7171 AT", 1 },
	145	{ "Maxtor 7213 AT", 1 },
	146	{ "Maxtor 7245 AT", 1 },
	147	{ "Maxtor 7345 AT", 1 },
	148	{ "Maxtor 7546 AT", 3 },
	149	{ "Maxtor 7540 AV", 3 },
	150
	151	{ "SAMSUNG SHD-3121A", 1 },
	152	{ "SAMSUNG SHD-3122A", 1 },
	153	{ "SAMSUNG SHD-3172A", 1 },
	154
1da177e4 LT	155	{ "ST5660A", 3 },
	156	{ "ST3660A", 3 },
	157	{ "ST3630A", 3 },
	158	{ "ST3655A", 3 },
	159	{ "ST3391A", 3 },
	160	{ "ST3390A", 1 },
	161	{ "ST3600A", 1 },
	162	{ "ST3290A", 0 },
	163	{ "ST3144A", 0 },
	164	{ "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
	165	/* drive) according to Seagates FIND-ATA program */
	166
	167	{ "QUANTUM ELS127A", 0 },
	168	{ "QUANTUM ELS170A", 0 },
	169	{ "QUANTUM LPS240A", 0 },
	170	{ "QUANTUM LPS210A", 3 },
	171	{ "QUANTUM LPS270A", 3 },
	172	{ "QUANTUM LPS365A", 3 },
	173	{ "QUANTUM LPS540A", 3 },
	174	{ "QUANTUM LIGHTNING 540A", 3 },
	175	{ "QUANTUM LIGHTNING 730A", 3 },
	176
	177	{ "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
	178	{ "QUANTUM FIREBALL_640", 3 },
	179	{ "QUANTUM FIREBALL_1080", 3 },
	180	{ "QUANTUM FIREBALL_1280", 3 },
	181	{ NULL, 0 }
	182	};
	183
	184	/**
	185	* ide_scan_pio_blacklist - check for a blacklisted drive
	186	* @model: Drive model string
	187	*
	188	* This routine searches the ide_pio_blacklist for an entry
	189	* matching the start/whole of the supplied model name.
	190	*
	191	* Returns -1 if no match found.
	192	* Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
	193	*/
	194
	195	static int ide_scan_pio_blacklist (char *model)
	196	{
	197	struct ide_pio_info *p;
	198
	199	for (p = ide_pio_blacklist; p->name != NULL; p++) {
	200	if (strncmp(p->name, model, strlen(p->name)) == 0)
	201	return p->pio;
	202	}
	203	return -1;
	204	}
	205
7dd00083 BZ	206	unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
	207	{
	208	struct hd_driveid *id = drive->id;
	209	int cycle_time = 0;
	210
	211	if (id->field_valid & 2) {
	212	if (id->capability & 8)
	213	cycle_time = id->eide_pio_iordy;
	214	else
	215	cycle_time = id->eide_pio;
	216	}
	217
	218	/* conservative "downgrade" for all pre-ATA2 drives */
	219	if (pio < 3) {
	220	if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
	221	cycle_time = 0; /* use standard timing */
	222	}
	223
	224	return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
	225	}
	226
	227	EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
	228
1da177e4 LT	229	/**
1da177e4 LT	230	* ide_get_best_pio_mode - get PIO mode from drive
81d368e0	231	* @drive: drive to consider
1da177e4	232	* @mode_wanted: preferred mode
81d368e0	233	* @max_mode: highest allowed mode
1da177e4 LT	234	*
	235	* This routine returns the recommended PIO settings for a given drive,
	236	* based on the drive->id information and the ide_pio_blacklist[].
1da177e4	237	*
81d368e0 SS	238	* Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
81d368e0 SS	239	* This is used by most chipset support modules when "auto-tuning".
1da177e4 LT	240	*/
1da177e4 LT	241
2134758d	242	u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
1da177e4 LT	243	{
1da177e4 LT	244	int pio_mode;
1da177e4 LT	245	struct hd_driveid* id = drive->id;
1da177e4 LT	246	int overridden = 0;
1da177e4	247
6a824c92 BZ	248	if (mode_wanted != 255)
	249	return min_t(u8, mode_wanted, max_mode);
	250
	251	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
	252	(pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
342cdb6d	253	printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
1da177e4 LT	254	} else {
	255	pio_mode = id->tPIO;
	256	if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
	257	pio_mode = 2;
	258	overridden = 1;
	259	}
	260	if (id->field_valid & 2) { /* drive implements ATA2? */
2229833c	261	if (id->capability & 8) { /* IORDY supported? */
1da177e4 LT	262	if (id->eide_pio_modes & 7) {
	263	overridden = 0;
	264	if (id->eide_pio_modes & 4)
	265	pio_mode = 5;
	266	else if (id->eide_pio_modes & 2)
	267	pio_mode = 4;
	268	else
	269	pio_mode = 3;
	270	}
1da177e4 LT	271	}
	272	}
	273
342cdb6d BZ	274	if (overridden)
	275	printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
	276	drive->name);
1da177e4	277	}
7dd00083 BZ	278
7dd00083 BZ	279	if (pio_mode > max_mode)
1da177e4	280	pio_mode = max_mode;
7dd00083	281
1da177e4 LT	282	return pio_mode;
	283	}
	284
	285	EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
	286
26bcb879 BZ	287	/* req_pio == "255" for auto-tune */
	288	void ide_set_pio(ide_drive_t *drive, u8 req_pio)
	289	{
	290	ide_hwif_t *hwif = drive->hwif;
ac95beed	291	const struct ide_port_ops *port_ops = hwif->port_ops;
26bcb879 BZ	292	u8 host_pio, pio;
26bcb879 BZ	293
ac95beed	294	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL \|\|
784506cb	295	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
26bcb879 BZ	296	return;
	297
	298	BUG_ON(hwif->pio_mask == 0x00);
	299
	300	host_pio = fls(hwif->pio_mask) - 1;
	301
	302	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
	303
	304	/*
	305	* TODO:
	306	* - report device max PIO mode
	307	* - check req_pio != 255 against device max PIO mode
	308	*/
	309	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
	310	drive->name, host_pio, req_pio,
	311	req_pio == 255 ? "(auto-tune)" : "", pio);
	312
88b2b32b	313	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
26bcb879 BZ	314	}
	315
	316	EXPORT_SYMBOL_GPL(ide_set_pio);
	317
1da177e4 LT	318	/**
	319	* ide_toggle_bounce - handle bounce buffering
	320	* @drive: drive to update
	321	* @on: on/off boolean
	322	*
	323	* Enable or disable bounce buffering for the device. Drives move
	324	* between PIO and DMA and that changes the rules we need.
	325	*/
	326
	327	void ide_toggle_bounce(ide_drive_t *drive, int on)
	328	{
	329	u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
	330
6593178d JB	331	if (!PCI_DMA_BUS_IS_PHYS) {
	332	addr = BLK_BOUNCE_ANY;
	333	} else if (on && drive->media == ide_disk) {
36501650 BZ	334	struct device *dev = drive->hwif->dev;
	335
	336	if (dev && dev->dma_mask)
	337	addr = *dev->dma_mask;
1da177e4 LT	338	}
	339
	340	if (drive->queue)
	341	blk_queue_bounce_limit(drive->queue, addr);
	342	}
	343
88b2b32b BZ	344	int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
	345	{
	346	ide_hwif_t *hwif = drive->hwif;
ac95beed	347	const struct ide_port_ops *port_ops = hwif->port_ops;
88b2b32b	348
784506cb BZ	349	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
	350	return 0;
	351
ac95beed	352	if (port_ops == NULL \|\| port_ops->set_pio_mode == NULL)
88b2b32b BZ	353	return -1;
	354
	355	/*
	356	* TODO: temporary hack for some legacy host drivers that didn't
	357	* set transfer mode on the device in ->set_pio_mode method...
	358	*/
ac95beed BZ	359	if (port_ops->set_dma_mode == NULL) {
ac95beed BZ	360	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	361	return 0;
	362	}
	363
	364	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
	365	if (ide_config_drive_speed(drive, mode))
	366	return -1;
ac95beed	367	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	368	return 0;
88b2b32b BZ	369	} else {
ac95beed	370	port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
88b2b32b BZ	371	return ide_config_drive_speed(drive, mode);
	372	}
	373	}
	374
	375	int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
	376	{
	377	ide_hwif_t *hwif = drive->hwif;
ac95beed	378	const struct ide_port_ops *port_ops = hwif->port_ops;
88b2b32b	379
784506cb BZ	380	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
	381	return 0;
	382
ac95beed	383	if (port_ops == NULL \|\| port_ops->set_dma_mode == NULL)
88b2b32b BZ	384	return -1;
	385
	386	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
	387	if (ide_config_drive_speed(drive, mode))
	388	return -1;
ac95beed	389	port_ops->set_dma_mode(drive, mode);
88b2b32b BZ	390	return 0;
88b2b32b BZ	391	} else {
ac95beed	392	port_ops->set_dma_mode(drive, mode);
88b2b32b BZ	393	return ide_config_drive_speed(drive, mode);
	394	}
	395	}
	396
	397	EXPORT_SYMBOL_GPL(ide_set_dma_mode);
	398
1da177e4 LT	399	/**
	400	* ide_set_xfer_rate - set transfer rate
	401	* @drive: drive to set
88b2b32b	402	* @rate: speed to attempt to set
1da177e4 LT	403	*
	404	* General helper for setting the speed of an IDE device. This
	405	* function knows about user enforced limits from the configuration
88b2b32b	406	* which ->set_pio_mode/->set_dma_mode does not.
1da177e4	407	*/
88b2b32b	408
1da177e4 LT	409	int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
1da177e4 LT	410	{
f212ff28	411	ide_hwif_t *hwif = drive->hwif;
ac95beed	412	const struct ide_port_ops *port_ops = hwif->port_ops;
f212ff28	413
ac95beed	414	if (port_ops == NULL \|\| port_ops->set_dma_mode == NULL \|\|
784506cb	415	(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
1da177e4	416	return -1;
f212ff28 BZ	417
	418	rate = ide_rate_filter(drive, rate);
	419
88b2b32b BZ	420	if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
88b2b32b BZ	421	return ide_set_pio_mode(drive, rate);
8f4dd2e4	422
88b2b32b BZ	423	/*
	424	* TODO: transfer modes 0x00-0x07 passed from the user-space are
	425	* currently handled here which needs fixing (please note that such
	426	* case could happen iff the transfer mode has already been set on
	427	* the device by ide-proc.c::set_xfer_rate()).
	428	*/
4db90a14 BZ	429	if (rate < XFER_PIO_0) {
	430	if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
	431	return ide_set_dma_mode(drive, rate);
	432	else
	433	return ide_config_drive_speed(drive, rate);
	434	}
8f4dd2e4	435
88b2b32b	436	return ide_set_dma_mode(drive, rate);
1da177e4 LT	437	}
1da177e4 LT	438
1da177e4 LT	439	static void ide_dump_opcode(ide_drive_t *drive)
	440	{
	441	struct request *rq;
7267c337	442	ide_task_t *task = NULL;
1da177e4 LT	443
	444	spin_lock(&ide_lock);
	445	rq = NULL;
	446	if (HWGROUP(drive))
	447	rq = HWGROUP(drive)->rq;
	448	spin_unlock(&ide_lock);
	449	if (!rq)
	450	return;
7267c337 BZ	451
	452	if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
	453	task = rq->special;
1da177e4 LT	454
1da177e4 LT	455	printk("ide: failed opcode was: ");
7267c337 BZ	456	if (task == NULL)
7267c337 BZ	457	printk(KERN_CONT "unknown\n");
1da177e4	458	else
7267c337	459	printk(KERN_CONT "0x%02x\n", task->tf.command);
1da177e4 LT	460	}
1da177e4 LT	461
a501633c	462	u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
c2b57cdc BZ	463	{
	464	u32 high, low;
	465
	466	if (lba48)
	467	high = (tf->hob_lbah << 16) \| (tf->hob_lbam << 8) \|
	468	tf->hob_lbal;
	469	else
	470	high = tf->device & 0xf;
	471	low = (tf->lbah << 16) \| (tf->lbam << 8) \| tf->lbal;
	472
	473	return ((u64)high << 24) \| low;
	474	}
a501633c	475	EXPORT_SYMBOL_GPL(ide_get_lba_addr);
c2b57cdc BZ	476
	477	static void ide_dump_sector(ide_drive_t *drive)
	478	{
	479	ide_task_t task;
	480	struct ide_taskfile *tf = &task.tf;
	481	int lba48 = (drive->addressing == 1) ? 1 : 0;
	482
	483	memset(&task, 0, sizeof(task));
	484	if (lba48)
	485	task.tf_flags = IDE_TFLAG_IN_LBA \| IDE_TFLAG_IN_HOB_LBA \|
	486	IDE_TFLAG_LBA48;
	487	else
	488	task.tf_flags = IDE_TFLAG_IN_LBA \| IDE_TFLAG_IN_DEVICE;
	489
94cd5b62	490	drive->hwif->tf_read(drive, &task);
c2b57cdc BZ	491
c2b57cdc BZ	492	if (lba48 \|\| (tf->device & ATA_LBA))
1c904fcf AM	493	printk(", LBAsect=%llu",
1c904fcf AM	494	(unsigned long long)ide_get_lba_addr(tf, lba48));
c2b57cdc BZ	495	else
	496	printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
	497	tf->device & 0xf, tf->lbal);
	498	}
	499
e62925dd	500	static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
1da177e4	501	{
e62925dd BZ	502	printk("{ ");
	503	if (err & ABRT_ERR) printk("DriveStatusError ");
	504	if (err & ICRC_ERR)
	505	printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
	506	if (err & ECC_ERR) printk("UncorrectableError ");
	507	if (err & ID_ERR) printk("SectorIdNotFound ");
	508	if (err & TRK0_ERR) printk("TrackZeroNotFound ");
	509	if (err & MARK_ERR) printk("AddrMarkNotFound ");
	510	printk("}");
	511	if ((err & (BBD_ERR \| ABRT_ERR)) == BBD_ERR \|\|
	512	(err & (ECC_ERR\|ID_ERR\|MARK_ERR))) {
	513	ide_dump_sector(drive);
	514	if (HWGROUP(drive) && HWGROUP(drive)->rq)
	515	printk(", sector=%llu",
	516	(unsigned long long)HWGROUP(drive)->rq->sector);
1da177e4	517	}
e62925dd BZ	518	printk("\n");
	519	}
	520
	521	static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
	522	{
	523	printk("{ ");
	524	if (err & ILI_ERR) printk("IllegalLengthIndication ");
	525	if (err & EOM_ERR) printk("EndOfMedia ");
	526	if (err & ABRT_ERR) printk("AbortedCommand ");
	527	if (err & MCR_ERR) printk("MediaChangeRequested ");
	528	if (err & LFS_ERR) printk("LastFailedSense=0x%02x ",
	529	(err & LFS_ERR) >> 4);
13bbbf28	530	printk("}\n");
1da177e4 LT	531	}
	532
	533	/**
e62925dd	534	* ide_dump_status - translate ATA/ATAPI error
1da177e4 LT	535	* @drive: drive that status applies to
	536	* @msg: text message to print
	537	* @stat: status byte to decode
	538	*
	539	* Error reporting, in human readable form (luxurious, but a memory hog).
e62925dd BZ	540	* Combines the drive name, message and status byte to provide a
e62925dd BZ	541	* user understandable explanation of the device error.
1da177e4 LT	542	*/
1da177e4 LT	543
e62925dd	544	u8 ide_dump_status(ide_drive_t drive, const char msg, u8 stat)
1da177e4 LT	545	{
1da177e4 LT	546	unsigned long flags;
0e38a66a	547	u8 err = 0;
1da177e4	548
3d1c1cc9	549	local_irq_save(flags);
1da177e4	550	printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
22c525b9	551	if (stat & BUSY_STAT)
1da177e4 LT	552	printk("Busy ");
1da177e4 LT	553	else {
22c525b9 BZ	554	if (stat & READY_STAT) printk("DriveReady ");
	555	if (stat & WRERR_STAT) printk("DeviceFault ");
	556	if (stat & SEEK_STAT) printk("SeekComplete ");
	557	if (stat & DRQ_STAT) printk("DataRequest ");
	558	if (stat & ECC_STAT) printk("CorrectedError ");
	559	if (stat & INDEX_STAT) printk("Index ");
	560	if (stat & ERR_STAT) printk("Error ");
1da177e4 LT	561	}
1da177e4 LT	562	printk("}\n");
22c525b9	563	if ((stat & (BUSY_STAT\|ERR_STAT)) == ERR_STAT) {
64a57fe4	564	err = ide_read_error(drive);
e62925dd BZ	565	printk("%s: %s: error=0x%02x ", drive->name, msg, err);
	566	if (drive->media == ide_disk)
	567	ide_dump_ata_error(drive, err);
	568	else
	569	ide_dump_atapi_error(drive, err);
1da177e4 LT	570	}
	571	ide_dump_opcode(drive);
	572	local_irq_restore(flags);
0e38a66a	573	return err;
1da177e4 LT	574	}
1da177e4 LT	575
1da177e4	576	EXPORT_SYMBOL(ide_dump_status);