drivers/ide/pci/atiixp.c - kernel/msm-4.19 - Gitiles

 /*
  *  linux/drivers/ide/pci/atiixp.c	Version 0.01-bart2	Feb. 26, 2004
  *
  *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
  *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
  *
  */

 #include <linux/config.h>
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/ioport.h>
 #include <linux/pci.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/delay.h>
 #include <linux/init.h>

 #include <asm/io.h>

 #define ATIIXP_IDE_PIO_TIMING		0x40
 #define ATIIXP_IDE_MDMA_TIMING		0x44
 #define ATIIXP_IDE_PIO_CONTROL		0x48
 #define ATIIXP_IDE_PIO_MODE		0x4a
 #define ATIIXP_IDE_UDMA_CONTROL		0x54
 #define ATIIXP_IDE_UDMA_MODE		0x56

 typedef struct {
 	u8 command_width;
 	u8 recover_width;
 } atiixp_ide_timing;

 static atiixp_ide_timing pio_timing[] = {
 	{ 0x05, 0x0d },
 	{ 0x04, 0x07 },
 	{ 0x03, 0x04 },
 	{ 0x02, 0x02 },
 	{ 0x02, 0x00 },
 };

 static atiixp_ide_timing mdma_timing[] = {
 	{ 0x07, 0x07 },
 	{ 0x02, 0x01 },
 	{ 0x02, 0x00 },
 };

 static int save_mdma_mode[4];

 /**
  *	atiixp_ratemask		-	compute rate mask for ATIIXP IDE
  *	@drive: IDE drive to compute for
  *
  *	Returns the available modes for the ATIIXP IDE controller.
  */

 static u8 atiixp_ratemask(ide_drive_t *drive)
 {
 	u8 mode = 3;

 	if (!eighty_ninty_three(drive))
 		mode = min(mode, (u8)1);
 	return mode;
 }

 /**
  *	atiixp_dma_2_pio		-	return the PIO mode matching DMA
  *	@xfer_rate: transfer speed
  *
  *	Returns the nearest equivalent PIO timing for the PIO or DMA
  *	mode requested by the controller.
  */

 static u8 atiixp_dma_2_pio(u8 xfer_rate) {
 	switch(xfer_rate) {
 		case XFER_UDMA_6:
 		case XFER_UDMA_5:
 		case XFER_UDMA_4:
 		case XFER_UDMA_3:
 		case XFER_UDMA_2:
 		case XFER_UDMA_1:
 		case XFER_UDMA_0:
 		case XFER_MW_DMA_2:
 		case XFER_PIO_4:
 			return 4;
 		case XFER_MW_DMA_1:
 		case XFER_PIO_3:
 			return 3;
 		case XFER_SW_DMA_2:
 		case XFER_PIO_2:
 			return 2;
 		case XFER_MW_DMA_0:
 		case XFER_SW_DMA_1:
 		case XFER_SW_DMA_0:
 		case XFER_PIO_1:
 		case XFER_PIO_0:
 		case XFER_PIO_SLOW:
 		default:
 			return 0;
 	}
 }

 static int atiixp_ide_dma_host_on(ide_drive_t *drive)
 {
 	struct pci_dev *dev = drive->hwif->pci_dev;
 	unsigned long flags;
 	u16 tmp16;

 	spin_lock_irqsave(&ide_lock, flags);

 	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 	if (save_mdma_mode[drive->dn])
 		tmp16 &= ~(1 << drive->dn);
 	else
 		tmp16 |= (1 << drive->dn);
 	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);

 	spin_unlock_irqrestore(&ide_lock, flags);

 	return __ide_dma_host_on(drive);
 }

 static int atiixp_ide_dma_host_off(ide_drive_t *drive)
 {
 	struct pci_dev *dev = drive->hwif->pci_dev;
 	unsigned long flags;
 	u16 tmp16;

 	spin_lock_irqsave(&ide_lock, flags);

 	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 	tmp16 &= ~(1 << drive->dn);
 	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);

 	spin_unlock_irqrestore(&ide_lock, flags);

 	return __ide_dma_host_off(drive);
 }

 /**
  *	atiixp_tune_drive		-	tune a drive attached to a ATIIXP
  *	@drive: drive to tune
  *	@pio: desired PIO mode
  *
  *	Set the interface PIO mode.
  */

 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 {
 	struct pci_dev *dev = drive->hwif->pci_dev;
 	unsigned long flags;
 	int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 	u32 pio_timing_data;
 	u16 pio_mode_data;

 	spin_lock_irqsave(&ide_lock, flags);

 	pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 	pio_mode_data &= ~(0x07 << (drive->dn * 4));
 	pio_mode_data |= (pio << (drive->dn * 4));
 	pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);

 	pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 	pio_timing_data &= ~(0xff << timing_shift);
 	pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
 		 (pio_timing[pio].command_width << (timing_shift + 4));
 	pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);

 	spin_unlock_irqrestore(&ide_lock, flags);
 }

 /**
  *	atiixp_tune_chipset	-	tune a ATIIXP interface
  *	@drive: IDE drive to tune
  *	@xferspeed: speed to configure
  *
  *	Set a ATIIXP interface channel to the desired speeds. This involves
  *	requires the right timing data into the ATIIXP configuration space
  *	then setting the drive parameters appropriately
  */

 static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
 {
 	struct pci_dev *dev = drive->hwif->pci_dev;
 	unsigned long flags;
 	int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 	u32 tmp32;
 	u16 tmp16;
 	u8 speed, pio;

 	speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);

 	spin_lock_irqsave(&ide_lock, flags);

 	save_mdma_mode[drive->dn] = 0;
 	if (speed >= XFER_UDMA_0) {
 		pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
 		tmp16 &= ~(0x07 << (drive->dn * 4));
 		tmp16 |= ((speed & 0x07) << (drive->dn * 4));
 		pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
 	} else {
 		if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
 			save_mdma_mode[drive->dn] = speed;
 			pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
 			tmp32 &= ~(0xff << timing_shift);
 			tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
 				(mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
 			pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
 		}
 	}

 	spin_unlock_irqrestore(&ide_lock, flags);

 	if (speed >= XFER_SW_DMA_0)
 		pio = atiixp_dma_2_pio(speed);
 	else
 		pio = speed - XFER_PIO_0;

 	atiixp_tuneproc(drive, pio);

 	return ide_config_drive_speed(drive, speed);
 }

 /**
  *	atiixp_config_drive_for_dma	-	configure drive for DMA
  *	@drive: IDE drive to configure
  *
  *	Set up a ATIIXP interface channel for the best available speed.
  *	We prefer UDMA if it is available and then MWDMA. If DMA is
  *	not available we switch to PIO and return 0.
  */

 static int atiixp_config_drive_for_dma(ide_drive_t *drive)
 {
 	u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive));

 	/* If no DMA speed was available then disable DMA and use PIO. */
 	if (!speed) {
 		u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
 		speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
 	}

 	(void) atiixp_speedproc(drive, speed);
 	return ide_dma_enable(drive);
 }

 /**
  *	atiixp_dma_check	-	set up an IDE device
  *	@drive: IDE drive to configure
  *
  *	Set up the ATIIXP interface for the best available speed on this
  *	interface, preferring DMA to PIO.
  */

 static int atiixp_dma_check(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
 	struct hd_driveid *id	= drive->id;
 	u8 tspeed, speed;

 	drive->init_speed = 0;

 	if ((id->capability & 1) && drive->autodma) {

 		if (ide_use_dma(drive)) {
 			if (atiixp_config_drive_for_dma(drive))
 				return hwif->ide_dma_on(drive);
 		}

 		goto fast_ata_pio;

 	} else if ((id->capability & 8) || (id->field_valid & 2)) {
 fast_ata_pio:
 		tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
 		speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
 		hwif->speedproc(drive, speed);
 		return hwif->ide_dma_off_quietly(drive);
 	}
 	/* IORDY not supported */
 	return 0;
 }

 /**
  *	init_hwif_atiixp		-	fill in the hwif for the ATIIXP
  *	@hwif: IDE interface
  *
  *	Set up the ide_hwif_t for the ATIIXP interface according to the
  *	capabilities of the hardware.
  */

 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 {
 	if (!hwif->irq)
 		hwif->irq = hwif->channel ? 15 : 14;

 	hwif->autodma = 0;
 	hwif->tuneproc = &atiixp_tuneproc;
 	hwif->speedproc = &atiixp_speedproc;
 	hwif->drives[0].autotune = 1;
 	hwif->drives[1].autotune = 1;

 	if (!hwif->dma_base)
 		return;

 	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x3f;
 	hwif->mwdma_mask = 0x06;
 	hwif->swdma_mask = 0x04;

 	/* FIXME: proper cable detection needed */
 	hwif->udma_four = 1;
 	hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
 	hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
 	hwif->ide_dma_check = &atiixp_dma_check;
 	if (!noautodma)
 		hwif->autodma = 1;

 	hwif->drives[1].autodma = hwif->autodma;
 	hwif->drives[0].autodma = hwif->autodma;
 }

 static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
 	{	/* 0 */
 		.name		= "ATIIXP",
 		.init_hwif	= init_hwif_atiixp,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
 		.bootable	= ON_BOARD,
 	}
 };

 /**
  *	atiixp_init_one	-	called when a ATIIXP is found
  *	@dev: the atiixp device
  *	@id: the matching pci id
  *
  *	Called when the PCI registration layer (or the IDE initialization)
  *	finds a device matching our IDE device tables.
  */

 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
 }

 static struct pci_device_id atiixp_pci_tbl[] = {
 	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);

 static struct pci_driver driver = {
 	.name		= "ATIIXP_IDE",
 	.id_table	= atiixp_pci_tbl,
 	.probe		= atiixp_init_one,
 };

 static int atiixp_ide_init(void)
 {
 	return ide_pci_register_driver(&driver);
 }

 module_init(atiixp_ide_init);

 MODULE_AUTHOR("HUI YU");
 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
 MODULE_LICENSE("GPL");
	/*
	* linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
	*
	* Copyright (C) 2003 ATI Inc. <hyu@ati.com>
	* Copyright (C) 2004 Bartlomiej Zolnierkiewicz
	*
	*/

	#include <linux/config.h>
	#include <linux/types.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/ioport.h>
	#include <linux/pci.h>
	#include <linux/hdreg.h>
	#include <linux/ide.h>
	#include <linux/delay.h>
	#include <linux/init.h>

	#include <asm/io.h>

	#define ATIIXP_IDE_PIO_TIMING 0x40
	#define ATIIXP_IDE_MDMA_TIMING 0x44
	#define ATIIXP_IDE_PIO_CONTROL 0x48
	#define ATIIXP_IDE_PIO_MODE 0x4a
	#define ATIIXP_IDE_UDMA_CONTROL 0x54
	#define ATIIXP_IDE_UDMA_MODE 0x56

	typedef struct {
	u8 command_width;
	u8 recover_width;
	} atiixp_ide_timing;

	static atiixp_ide_timing pio_timing[] = {
	{ 0x05, 0x0d },
	{ 0x04, 0x07 },
	{ 0x03, 0x04 },
	{ 0x02, 0x02 },
	{ 0x02, 0x00 },
	};

	static atiixp_ide_timing mdma_timing[] = {
	{ 0x07, 0x07 },
	{ 0x02, 0x01 },
	{ 0x02, 0x00 },
	};

	static int save_mdma_mode[4];

	/**
	* atiixp_ratemask - compute rate mask for ATIIXP IDE
	* @drive: IDE drive to compute for
	*
	* Returns the available modes for the ATIIXP IDE controller.
	*/

	static u8 atiixp_ratemask(ide_drive_t *drive)
	{
	u8 mode = 3;

	if (!eighty_ninty_three(drive))
	mode = min(mode, (u8)1);
	return mode;
	}

	/**
	* atiixp_dma_2_pio - return the PIO mode matching DMA
	* @xfer_rate: transfer speed
	*
	* Returns the nearest equivalent PIO timing for the PIO or DMA
	* mode requested by the controller.
	*/

	static u8 atiixp_dma_2_pio(u8 xfer_rate) {
	switch(xfer_rate) {
	case XFER_UDMA_6:
	case XFER_UDMA_5:
	case XFER_UDMA_4:
	case XFER_UDMA_3:
	case XFER_UDMA_2:
	case XFER_UDMA_1:
	case XFER_UDMA_0:
	case XFER_MW_DMA_2:
	case XFER_PIO_4:
	return 4;
	case XFER_MW_DMA_1:
	case XFER_PIO_3:
	return 3;
	case XFER_SW_DMA_2:
	case XFER_PIO_2:
	return 2;
	case XFER_MW_DMA_0:
	case XFER_SW_DMA_1:
	case XFER_SW_DMA_0:
	case XFER_PIO_1:
	case XFER_PIO_0:
	case XFER_PIO_SLOW:
	default:
	return 0;
	}
	}

	static int atiixp_ide_dma_host_on(ide_drive_t *drive)
	{
	struct pci_dev *dev = drive->hwif->pci_dev;
	unsigned long flags;
	u16 tmp16;

	spin_lock_irqsave(&ide_lock, flags);

	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
	if (save_mdma_mode[drive->dn])
	tmp16 &= ~(1 << drive->dn);
	else
	tmp16 \|= (1 << drive->dn);
	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);

	spin_unlock_irqrestore(&ide_lock, flags);

	return __ide_dma_host_on(drive);
	}

	static int atiixp_ide_dma_host_off(ide_drive_t *drive)
	{
	struct pci_dev *dev = drive->hwif->pci_dev;
	unsigned long flags;
	u16 tmp16;

	spin_lock_irqsave(&ide_lock, flags);

	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
	tmp16 &= ~(1 << drive->dn);
	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);

	spin_unlock_irqrestore(&ide_lock, flags);

	return __ide_dma_host_off(drive);
	}

	/**
	* atiixp_tune_drive - tune a drive attached to a ATIIXP
	* @drive: drive to tune
	* @pio: desired PIO mode
	*
	* Set the interface PIO mode.
	*/

	static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
	{
	struct pci_dev *dev = drive->hwif->pci_dev;
	unsigned long flags;
	int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
	u32 pio_timing_data;
	u16 pio_mode_data;

	spin_lock_irqsave(&ide_lock, flags);

	pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
	pio_mode_data &= ~(0x07 << (drive->dn * 4));
	pio_mode_data \|= (pio << (drive->dn * 4));
	pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);

	pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
	pio_timing_data &= ~(0xff << timing_shift);
	pio_timing_data \|= (pio_timing[pio].recover_width << timing_shift) \|
	(pio_timing[pio].command_width << (timing_shift + 4));
	pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);

	spin_unlock_irqrestore(&ide_lock, flags);
	}

	/**
	* atiixp_tune_chipset - tune a ATIIXP interface
	* @drive: IDE drive to tune
	* @xferspeed: speed to configure
	*
	* Set a ATIIXP interface channel to the desired speeds. This involves
	* requires the right timing data into the ATIIXP configuration space
	* then setting the drive parameters appropriately
	*/

	static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
	{
	struct pci_dev *dev = drive->hwif->pci_dev;
	unsigned long flags;
	int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
	u32 tmp32;
	u16 tmp16;
	u8 speed, pio;

	speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);

	spin_lock_irqsave(&ide_lock, flags);

	save_mdma_mode[drive->dn] = 0;
	if (speed >= XFER_UDMA_0) {
	pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
	tmp16 &= ~(0x07 << (drive->dn * 4));
	tmp16 \|= ((speed & 0x07) << (drive->dn * 4));
	pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
	} else {
	if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
	save_mdma_mode[drive->dn] = speed;
	pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
	tmp32 &= ~(0xff << timing_shift);
	tmp32 \|= (mdma_timing[speed & 0x03].recover_width << timing_shift) \|
	(mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
	pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
	}
	}

	spin_unlock_irqrestore(&ide_lock, flags);

	if (speed >= XFER_SW_DMA_0)
	pio = atiixp_dma_2_pio(speed);
	else
	pio = speed - XFER_PIO_0;

	atiixp_tuneproc(drive, pio);

	return ide_config_drive_speed(drive, speed);
	}

	/**
	* atiixp_config_drive_for_dma - configure drive for DMA
	* @drive: IDE drive to configure
	*
	* Set up a ATIIXP interface channel for the best available speed.
	* We prefer UDMA if it is available and then MWDMA. If DMA is
	* not available we switch to PIO and return 0.
	*/

	static int atiixp_config_drive_for_dma(ide_drive_t *drive)
	{
	u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive));

	/* If no DMA speed was available then disable DMA and use PIO. */
	if (!speed) {
	u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
	speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
	}

	(void) atiixp_speedproc(drive, speed);
	return ide_dma_enable(drive);
	}

	/**
	* atiixp_dma_check - set up an IDE device
	* @drive: IDE drive to configure
	*
	* Set up the ATIIXP interface for the best available speed on this
	* interface, preferring DMA to PIO.
	*/

	static int atiixp_dma_check(ide_drive_t *drive)
	{
	ide_hwif_t *hwif = HWIF(drive);
	struct hd_driveid *id = drive->id;
	u8 tspeed, speed;

	drive->init_speed = 0;

	if ((id->capability & 1) && drive->autodma) {

	if (ide_use_dma(drive)) {
	if (atiixp_config_drive_for_dma(drive))
	return hwif->ide_dma_on(drive);
	}

	goto fast_ata_pio;

	} else if ((id->capability & 8) \|\| (id->field_valid & 2)) {
	fast_ata_pio:
	tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
	speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
	hwif->speedproc(drive, speed);
	return hwif->ide_dma_off_quietly(drive);
	}
	/* IORDY not supported */
	return 0;
	}

	/**
	* init_hwif_atiixp - fill in the hwif for the ATIIXP
	* @hwif: IDE interface
	*
	* Set up the ide_hwif_t for the ATIIXP interface according to the
	* capabilities of the hardware.
	*/

	static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
	{
	if (!hwif->irq)
	hwif->irq = hwif->channel ? 15 : 14;

	hwif->autodma = 0;
	hwif->tuneproc = &atiixp_tuneproc;
	hwif->speedproc = &atiixp_speedproc;
	hwif->drives[0].autotune = 1;
	hwif->drives[1].autotune = 1;

	if (!hwif->dma_base)
	return;

	hwif->atapi_dma = 1;
	hwif->ultra_mask = 0x3f;
	hwif->mwdma_mask = 0x06;
	hwif->swdma_mask = 0x04;

	/* FIXME: proper cable detection needed */
	hwif->udma_four = 1;
	hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
	hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
	hwif->ide_dma_check = &atiixp_dma_check;
	if (!noautodma)
	hwif->autodma = 1;

	hwif->drives[1].autodma = hwif->autodma;
	hwif->drives[0].autodma = hwif->autodma;
	}

	static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
	{ /* 0 */
	.name = "ATIIXP",
	.init_hwif = init_hwif_atiixp,
	.channels = 2,
	.autodma = AUTODMA,
	.enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
	.bootable = ON_BOARD,
	}
	};

	/**
	* atiixp_init_one - called when a ATIIXP is found
	* @dev: the atiixp device
	* @id: the matching pci id
	*
	* Called when the PCI registration layer (or the IDE initialization)
	* finds a device matching our IDE device tables.
	*/

	static int __devinit atiixp_init_one(struct pci_dev dev, const struct pci_device_id id)
	{
	return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
	}

	static struct pci_device_id atiixp_pci_tbl[] = {
	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{ 0, },
	};
	MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);

	static struct pci_driver driver = {
	.name = "ATIIXP_IDE",
	.id_table = atiixp_pci_tbl,
	.probe = atiixp_init_one,
	};

	static int atiixp_ide_init(void)
	{
	return ide_pci_register_driver(&driver);
	}

	module_init(atiixp_ide_init);

	MODULE_AUTHOR("HUI YU");
	MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
	MODULE_LICENSE("GPL");