drivers/ide/pdc202xx_old.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
  *  Copyright (C) 2006-2007, 2009	MontaVista Software, Inc.
  *  Copyright (C) 2007-2010		Bartlomiej Zolnierkiewicz
  *
  *  Portions Copyright (C) 1999 Promise Technology, Inc.
  *  Author: Frank Tiernan (frankt@promise.com)
  *  Released under terms of General Public License
  */

 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/blkdev.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>

 #include <asm/io.h>

 #define DRV_NAME "pdc202xx_old"

 static void pdc202xx_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	u8 drive_pci		= 0x60 + (drive->dn << 2);
 	const u8 speed		= drive->dma_mode;

 	u8			AP = 0, BP = 0, CP = 0;
 	u8			TA = 0, TB = 0, TC = 0;

 	pci_read_config_byte(dev, drive_pci,     &AP);
 	pci_read_config_byte(dev, drive_pci + 1, &BP);
 	pci_read_config_byte(dev, drive_pci + 2, &CP);

 	switch(speed) {
 		case XFER_UDMA_5:
 		case XFER_UDMA_4:	TB = 0x20; TC = 0x01; break;
 		case XFER_UDMA_2:	TB = 0x20; TC = 0x01; break;
 		case XFER_UDMA_3:
 		case XFER_UDMA_1:	TB = 0x40; TC = 0x02; break;
 		case XFER_UDMA_0:
 		case XFER_MW_DMA_2:	TB = 0x60; TC = 0x03; break;
 		case XFER_MW_DMA_1:	TB = 0x60; TC = 0x04; break;
 		case XFER_MW_DMA_0:	TB = 0xE0; TC = 0x0F; break;
 		case XFER_PIO_4:	TA = 0x01; TB = 0x04; break;
 		case XFER_PIO_3:	TA = 0x02; TB = 0x06; break;
 		case XFER_PIO_2:	TA = 0x03; TB = 0x08; break;
 		case XFER_PIO_1:	TA = 0x05; TB = 0x0C; break;
 		case XFER_PIO_0:
 		default:		TA = 0x09; TB = 0x13; break;
 	}

 	if (speed < XFER_SW_DMA_0) {
 		/*
 		 * preserve SYNC_INT / ERDDY_EN bits while clearing
 		 * Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
 		 */
 		AP &= ~0x3f;
 		if (ide_pio_need_iordy(drive, speed - XFER_PIO_0))
 			AP |= 0x20;	/* set IORDY_EN bit */
 		if (drive->media == ide_disk)
 			AP |= 0x10;	/* set Prefetch_EN bit */
 		/* clear PB[4:0] bits of register B */
 		BP &= ~0x1f;
 		pci_write_config_byte(dev, drive_pci,     AP | TA);
 		pci_write_config_byte(dev, drive_pci + 1, BP | TB);
 	} else {
 		/* clear MB[2:0] bits of register B */
 		BP &= ~0xe0;
 		/* clear MC[3:0] bits of register C */
 		CP &= ~0x0f;
 		pci_write_config_byte(dev, drive_pci + 1, BP | TB);
 		pci_write_config_byte(dev, drive_pci + 2, CP | TC);
 	}
 }

 static void pdc202xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
 	drive->dma_mode = drive->pio_mode;
 	pdc202xx_set_mode(hwif, drive);
 }

 static int pdc202xx_test_irq(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	unsigned long high_16	= pci_resource_start(dev, 4);
 	u8 sc1d			= inb(high_16 + 0x1d);

 	if (hwif->channel) {
 		/*
 		 * bit 7: error, bit 6: interrupting,
 		 * bit 5: FIFO full, bit 4: FIFO empty
 		 */
 		return (sc1d & 0x40) ? 1 : 0;
 	} else	{
 		/*
 		 * bit 3: error, bit 2: interrupting,
 		 * bit 1: FIFO full, bit 0: FIFO empty
 		 */
 		return (sc1d & 0x04) ? 1 : 0;
 	}
 }

 static u8 pdc2026x_cable_detect(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
 	u16 CIS, mask = hwif->channel ? (1 << 11) : (1 << 10);

 	pci_read_config_word(dev, 0x50, &CIS);

 	return (CIS & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 }

 /*
  * Set the control register to use the 66MHz system
  * clock for UDMA 3/4/5 mode operation when necessary.
  *
  * FIXME: this register is shared by both channels, some locking is needed
  *
  * It may also be possible to leave the 66MHz clock on
  * and readjust the timing parameters.
  */
 static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
 {
 	unsigned long clock_reg = hwif->extra_base + 0x01;
 	u8 clock = inb(clock_reg);

 	outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg);
 }

 static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
 {
 	unsigned long clock_reg = hwif->extra_base + 0x01;
 	u8 clock = inb(clock_reg);

 	outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
 }

 static void pdc2026x_init_hwif(ide_hwif_t *hwif)
 {
 	pdc_old_disable_66MHz_clock(hwif);
 }

 static void pdc202xx_dma_start(ide_drive_t *drive)
 {
 	if (drive->current_speed > XFER_UDMA_2)
 		pdc_old_enable_66MHz_clock(drive->hwif);
 	if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
 		ide_hwif_t *hwif	= drive->hwif;
 		struct request *rq	= hwif->rq;
 		unsigned long high_16	= hwif->extra_base - 16;
 		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
 		u32 word_count	= 0;
 		u8 clock = inb(high_16 + 0x11);

 		outb(clock | (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
 		word_count = (blk_rq_sectors(rq) << 8);
 		word_count = (rq_data_dir(rq) == READ) ?
 					word_count | 0x05000000 :
 					word_count | 0x06000000;
 		outl(word_count, atapi_reg);
 	}
 	ide_dma_start(drive);
 }

 static int pdc202xx_dma_end(ide_drive_t *drive)
 {
 	if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
 		ide_hwif_t *hwif	= drive->hwif;
 		unsigned long high_16	= hwif->extra_base - 16;
 		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
 		u8 clock		= 0;

 		outl(0, atapi_reg); /* zero out extra */
 		clock = inb(high_16 + 0x11);
 		outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
 	}
 	if (drive->current_speed > XFER_UDMA_2)
 		pdc_old_disable_66MHz_clock(drive->hwif);
 	return ide_dma_end(drive);
 }

 static int init_chipset_pdc202xx(struct pci_dev *dev)
 {
 	unsigned long dmabase = pci_resource_start(dev, 4);
 	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;

 	if (dmabase == 0)
 		goto out;

 	udma_speed_flag	= inb(dmabase | 0x1f);
 	primary_mode	= inb(dmabase | 0x1a);
 	secondary_mode	= inb(dmabase | 0x1b);
 	printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
 		"Primary %s Mode " \
 		"Secondary %s Mode.\n", pci_name(dev),
 		(udma_speed_flag & 1) ? "EN" : "DIS",
 		(primary_mode & 1) ? "MASTER" : "PCI",
 		(secondary_mode & 1) ? "MASTER" : "PCI" );

 	if (!(udma_speed_flag & 1)) {
 		printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
 			pci_name(dev), udma_speed_flag,
 			(udma_speed_flag|1));
 		outb(udma_speed_flag | 1, dmabase | 0x1f);
 		printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN");
 	}
 out:
 	return 0;
 }

 static void pdc202ata4_fixup_irq(struct pci_dev *dev, const char *name)
 {
 	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
 		u8 irq = 0, irq2 = 0;
 		pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
 		/* 0xbc */
 		pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);
 		if (irq != irq2) {
 			pci_write_config_byte(dev,
 				(PCI_INTERRUPT_LINE)|0x80, irq);     /* 0xbc */
 			printk(KERN_INFO "%s %s: PCI config space interrupt "
 				"mirror fixed\n", name, pci_name(dev));
 		}
 	}
 }

 #define IDE_HFLAGS_PDC202XX \
 	(IDE_HFLAG_ERROR_STOPS_FIFO | \
 	 IDE_HFLAG_OFF_BOARD)

 static const struct ide_port_ops pdc20246_port_ops = {
 	.set_pio_mode		= pdc202xx_set_pio_mode,
 	.set_dma_mode		= pdc202xx_set_mode,
 	.test_irq		= pdc202xx_test_irq,
 };

 static const struct ide_port_ops pdc2026x_port_ops = {
 	.set_pio_mode		= pdc202xx_set_pio_mode,
 	.set_dma_mode		= pdc202xx_set_mode,
 	.test_irq		= pdc202xx_test_irq,
 	.cable_detect		= pdc2026x_cable_detect,
 };

 static const struct ide_dma_ops pdc2026x_dma_ops = {
 	.dma_host_set		= ide_dma_host_set,
 	.dma_setup		= ide_dma_setup,
 	.dma_start		= pdc202xx_dma_start,
 	.dma_end		= pdc202xx_dma_end,
 	.dma_test_irq		= ide_dma_test_irq,
 	.dma_lost_irq		= ide_dma_lost_irq,
 	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
 	.dma_sff_read_status	= ide_dma_sff_read_status,
 };

 #define DECLARE_PDC2026X_DEV(udma, sectors) \
 	{ \
 		.name		= DRV_NAME, \
 		.init_chipset	= init_chipset_pdc202xx, \
 		.init_hwif	= pdc2026x_init_hwif, \
 		.port_ops	= &pdc2026x_port_ops, \
 		.dma_ops	= &pdc2026x_dma_ops, \
 		.host_flags	= IDE_HFLAGS_PDC202XX, \
 		.pio_mask	= ATA_PIO4, \
 		.mwdma_mask	= ATA_MWDMA2, \
 		.udma_mask	= udma, \
 		.max_sectors	= sectors, \
 	}

 static const struct ide_port_info pdc202xx_chipsets[] = {
 	{	/* 0: PDC20246 */
 		.name		= DRV_NAME,
 		.init_chipset	= init_chipset_pdc202xx,
 		.port_ops	= &pdc20246_port_ops,
 		.dma_ops	= &sff_dma_ops,
 		.host_flags	= IDE_HFLAGS_PDC202XX,
 		.pio_mask	= ATA_PIO4,
 		.mwdma_mask	= ATA_MWDMA2,
 		.udma_mask	= ATA_UDMA2,
 	},

 	/* 1: PDC2026{2,3} */
 	DECLARE_PDC2026X_DEV(ATA_UDMA4, 0),
 	/* 2: PDC2026{5,7}: UDMA5, limit LBA48 requests to 256 sectors */
 	DECLARE_PDC2026X_DEV(ATA_UDMA5, 256),
 };

 /**
  *	pdc202xx_init_one	-	called when a PDC202xx is found
  *	@dev: the pdc202xx 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 pdc202xx_init_one(struct pci_dev *dev,
 			     const struct pci_device_id *id)
 {
 	const struct ide_port_info *d;
 	u8 idx = id->driver_data;

 	d = &pdc202xx_chipsets[idx];

 	if (idx < 2)
 		pdc202ata4_fixup_irq(dev, d->name);

 	if (dev->vendor == PCI_DEVICE_ID_PROMISE_20265) {
 		struct pci_dev *bridge = dev->bus->self;

 		if (bridge &&
 		    bridge->vendor == PCI_VENDOR_ID_INTEL &&
 		    (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
 		     bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
 			printk(KERN_INFO DRV_NAME " %s: skipping Promise "
 				"PDC20265 attached to I2O RAID controller\n",
 				pci_name(dev));
 			return -ENODEV;
 		}
 	}

 	return ide_pci_init_one(dev, d, NULL);
 }

 static const struct pci_device_id pdc202xx_pci_tbl[] = {
 	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
 	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
 	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
 	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
 	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);

 static struct pci_driver pdc202xx_pci_driver = {
 	.name		= "Promise_Old_IDE",
 	.id_table	= pdc202xx_pci_tbl,
 	.probe		= pdc202xx_init_one,
 	.remove		= ide_pci_remove,
 	.suspend	= ide_pci_suspend,
 	.resume		= ide_pci_resume,
 };

 static int __init pdc202xx_ide_init(void)
 {
 	return ide_pci_register_driver(&pdc202xx_pci_driver);
 }

 static void __exit pdc202xx_ide_exit(void)
 {
 	pci_unregister_driver(&pdc202xx_pci_driver);
 }

 module_init(pdc202xx_ide_init);
 module_exit(pdc202xx_ide_exit);

 MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Bartlomiej Zolnierkiewicz");
 MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
	* Copyright (C) 2006-2007, 2009 MontaVista Software, Inc.
	* Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
	*
	* Portions Copyright (C) 1999 Promise Technology, Inc.
	* Author: Frank Tiernan (frankt@promise.com)
	* Released under terms of General Public License
	*/

	#include <linux/types.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/delay.h>
	#include <linux/blkdev.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/ide.h>

	#include <asm/io.h>

	#define DRV_NAME "pdc202xx_old"

	static void pdc202xx_set_mode(ide_hwif_t hwif, ide_drive_t drive)
	{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u8 drive_pci = 0x60 + (drive->dn << 2);
	const u8 speed = drive->dma_mode;

	u8 AP = 0, BP = 0, CP = 0;
	u8 TA = 0, TB = 0, TC = 0;

	pci_read_config_byte(dev, drive_pci, &AP);
	pci_read_config_byte(dev, drive_pci + 1, &BP);
	pci_read_config_byte(dev, drive_pci + 2, &CP);

	switch(speed) {
	case XFER_UDMA_5:
	case XFER_UDMA_4: TB = 0x20; TC = 0x01; break;
	case XFER_UDMA_2: TB = 0x20; TC = 0x01; break;
	case XFER_UDMA_3:
	case XFER_UDMA_1: TB = 0x40; TC = 0x02; break;
	case XFER_UDMA_0:
	case XFER_MW_DMA_2: TB = 0x60; TC = 0x03; break;
	case XFER_MW_DMA_1: TB = 0x60; TC = 0x04; break;
	case XFER_MW_DMA_0: TB = 0xE0; TC = 0x0F; break;
	case XFER_PIO_4: TA = 0x01; TB = 0x04; break;
	case XFER_PIO_3: TA = 0x02; TB = 0x06; break;
	case XFER_PIO_2: TA = 0x03; TB = 0x08; break;
	case XFER_PIO_1: TA = 0x05; TB = 0x0C; break;
	case XFER_PIO_0:
	default: TA = 0x09; TB = 0x13; break;
	}

	if (speed < XFER_SW_DMA_0) {
	/*
	* preserve SYNC_INT / ERDDY_EN bits while clearing
	* Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
	*/
	AP &= ~0x3f;
	if (ide_pio_need_iordy(drive, speed - XFER_PIO_0))
	AP \|= 0x20; /* set IORDY_EN bit */
	if (drive->media == ide_disk)
	AP \|= 0x10; /* set Prefetch_EN bit */
	/* clear PB[4:0] bits of register B */
	BP &= ~0x1f;
	pci_write_config_byte(dev, drive_pci, AP \| TA);
	pci_write_config_byte(dev, drive_pci + 1, BP \| TB);
	} else {
	/* clear MB[2:0] bits of register B */
	BP &= ~0xe0;
	/* clear MC[3:0] bits of register C */
	CP &= ~0x0f;
	pci_write_config_byte(dev, drive_pci + 1, BP \| TB);
	pci_write_config_byte(dev, drive_pci + 2, CP \| TC);
	}
	}

	static void pdc202xx_set_pio_mode(ide_hwif_t hwif, ide_drive_t drive)
	{
	drive->dma_mode = drive->pio_mode;
	pdc202xx_set_mode(hwif, drive);
	}

	static int pdc202xx_test_irq(ide_hwif_t *hwif)
	{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	unsigned long high_16 = pci_resource_start(dev, 4);
	u8 sc1d = inb(high_16 + 0x1d);

	if (hwif->channel) {
	/*
	* bit 7: error, bit 6: interrupting,
	* bit 5: FIFO full, bit 4: FIFO empty
	*/
	return (sc1d & 0x40) ? 1 : 0;
	} else {
	/*
	* bit 3: error, bit 2: interrupting,
	* bit 1: FIFO full, bit 0: FIFO empty
	*/
	return (sc1d & 0x04) ? 1 : 0;
	}
	}

	static u8 pdc2026x_cable_detect(ide_hwif_t *hwif)
	{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	u16 CIS, mask = hwif->channel ? (1 << 11) : (1 << 10);

	pci_read_config_word(dev, 0x50, &CIS);

	return (CIS & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
	}

	/*
	* Set the control register to use the 66MHz system
	* clock for UDMA 3/4/5 mode operation when necessary.
	*
	* FIXME: this register is shared by both channels, some locking is needed
	*
	* It may also be possible to leave the 66MHz clock on
	* and readjust the timing parameters.
	*/
	static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
	{
	unsigned long clock_reg = hwif->extra_base + 0x01;
	u8 clock = inb(clock_reg);

	outb(clock \| (hwif->channel ? 0x08 : 0x02), clock_reg);
	}

	static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
	{
	unsigned long clock_reg = hwif->extra_base + 0x01;
	u8 clock = inb(clock_reg);

	outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
	}

	static void pdc2026x_init_hwif(ide_hwif_t *hwif)
	{
	pdc_old_disable_66MHz_clock(hwif);
	}

	static void pdc202xx_dma_start(ide_drive_t *drive)
	{
	if (drive->current_speed > XFER_UDMA_2)
	pdc_old_enable_66MHz_clock(drive->hwif);
	if (drive->media != ide_disk \|\| (drive->dev_flags & IDE_DFLAG_LBA48)) {
	ide_hwif_t *hwif = drive->hwif;
	struct request *rq = hwif->rq;
	unsigned long high_16 = hwif->extra_base - 16;
	unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
	u32 word_count = 0;
	u8 clock = inb(high_16 + 0x11);

	outb(clock \| (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
	word_count = (blk_rq_sectors(rq) << 8);
	word_count = (rq_data_dir(rq) == READ) ?
	word_count \| 0x05000000 :
	word_count \| 0x06000000;
	outl(word_count, atapi_reg);
	}
	ide_dma_start(drive);
	}

	static int pdc202xx_dma_end(ide_drive_t *drive)
	{
	if (drive->media != ide_disk \|\| (drive->dev_flags & IDE_DFLAG_LBA48)) {
	ide_hwif_t *hwif = drive->hwif;
	unsigned long high_16 = hwif->extra_base - 16;
	unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
	u8 clock = 0;

	outl(0, atapi_reg); /* zero out extra */
	clock = inb(high_16 + 0x11);
	outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
	}
	if (drive->current_speed > XFER_UDMA_2)
	pdc_old_disable_66MHz_clock(drive->hwif);
	return ide_dma_end(drive);
	}

	static int init_chipset_pdc202xx(struct pci_dev *dev)
	{
	unsigned long dmabase = pci_resource_start(dev, 4);
	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;

	if (dmabase == 0)
	goto out;

	udma_speed_flag = inb(dmabase \| 0x1f);
	primary_mode = inb(dmabase \| 0x1a);
	secondary_mode = inb(dmabase \| 0x1b);
	printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
	"Primary %s Mode " \
	"Secondary %s Mode.\n", pci_name(dev),
	(udma_speed_flag & 1) ? "EN" : "DIS",
	(primary_mode & 1) ? "MASTER" : "PCI",
	(secondary_mode & 1) ? "MASTER" : "PCI" );

	if (!(udma_speed_flag & 1)) {
	printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
	pci_name(dev), udma_speed_flag,
	(udma_speed_flag\|1));
	outb(udma_speed_flag \| 1, dmabase \| 0x1f);
	printk("%sACTIVE\n", (inb(dmabase \| 0x1f) & 1) ? "" : "IN");
	}
	out:
	return 0;
	}

	static void pdc202ata4_fixup_irq(struct pci_dev dev, const char name)
	{
	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
	u8 irq = 0, irq2 = 0;
	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
	/* 0xbc */
	pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)\|0x80, &irq2);
	if (irq != irq2) {
	pci_write_config_byte(dev,
	(PCI_INTERRUPT_LINE)\|0x80, irq); /* 0xbc */
	printk(KERN_INFO "%s %s: PCI config space interrupt "
	"mirror fixed\n", name, pci_name(dev));
	}
	}
	}

	#define IDE_HFLAGS_PDC202XX \
	(IDE_HFLAG_ERROR_STOPS_FIFO \| \
	IDE_HFLAG_OFF_BOARD)

	static const struct ide_port_ops pdc20246_port_ops = {
	.set_pio_mode = pdc202xx_set_pio_mode,
	.set_dma_mode = pdc202xx_set_mode,
	.test_irq = pdc202xx_test_irq,
	};

	static const struct ide_port_ops pdc2026x_port_ops = {
	.set_pio_mode = pdc202xx_set_pio_mode,
	.set_dma_mode = pdc202xx_set_mode,
	.test_irq = pdc202xx_test_irq,
	.cable_detect = pdc2026x_cable_detect,
	};

	static const struct ide_dma_ops pdc2026x_dma_ops = {
	.dma_host_set = ide_dma_host_set,
	.dma_setup = ide_dma_setup,
	.dma_start = pdc202xx_dma_start,
	.dma_end = pdc202xx_dma_end,
	.dma_test_irq = ide_dma_test_irq,
	.dma_lost_irq = ide_dma_lost_irq,
	.dma_timer_expiry = ide_dma_sff_timer_expiry,
	.dma_sff_read_status = ide_dma_sff_read_status,
	};

	#define DECLARE_PDC2026X_DEV(udma, sectors) \
	{ \
	.name = DRV_NAME, \
	.init_chipset = init_chipset_pdc202xx, \
	.init_hwif = pdc2026x_init_hwif, \
	.port_ops = &pdc2026x_port_ops, \
	.dma_ops = &pdc2026x_dma_ops, \
	.host_flags = IDE_HFLAGS_PDC202XX, \
	.pio_mask = ATA_PIO4, \
	.mwdma_mask = ATA_MWDMA2, \
	.udma_mask = udma, \
	.max_sectors = sectors, \
	}

	static const struct ide_port_info pdc202xx_chipsets[] = {
	{ /* 0: PDC20246 */
	.name = DRV_NAME,
	.init_chipset = init_chipset_pdc202xx,
	.port_ops = &pdc20246_port_ops,
	.dma_ops = &sff_dma_ops,
	.host_flags = IDE_HFLAGS_PDC202XX,
	.pio_mask = ATA_PIO4,
	.mwdma_mask = ATA_MWDMA2,
	.udma_mask = ATA_UDMA2,
	},

	/* 1: PDC2026{2,3} */
	DECLARE_PDC2026X_DEV(ATA_UDMA4, 0),
	/* 2: PDC2026{5,7}: UDMA5, limit LBA48 requests to 256 sectors */
	DECLARE_PDC2026X_DEV(ATA_UDMA5, 256),
	};

	/**
	* pdc202xx_init_one - called when a PDC202xx is found
	* @dev: the pdc202xx 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 pdc202xx_init_one(struct pci_dev *dev,
	const struct pci_device_id *id)
	{
	const struct ide_port_info *d;
	u8 idx = id->driver_data;

	d = &pdc202xx_chipsets[idx];

	if (idx < 2)
	pdc202ata4_fixup_irq(dev, d->name);

	if (dev->vendor == PCI_DEVICE_ID_PROMISE_20265) {
	struct pci_dev *bridge = dev->bus->self;

	if (bridge &&
	bridge->vendor == PCI_VENDOR_ID_INTEL &&
	(bridge->device == PCI_DEVICE_ID_INTEL_I960 \|\|
	bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
	printk(KERN_INFO DRV_NAME " %s: skipping Promise "
	"PDC20265 attached to I2O RAID controller\n",
	pci_name(dev));
	return -ENODEV;
	}
	}

	return ide_pci_init_one(dev, d, NULL);
	}

	static const struct pci_device_id pdc202xx_pci_tbl[] = {
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
	{ 0, },
	};
	MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);

	static struct pci_driver pdc202xx_pci_driver = {
	.name = "Promise_Old_IDE",
	.id_table = pdc202xx_pci_tbl,
	.probe = pdc202xx_init_one,
	.remove = ide_pci_remove,
	.suspend = ide_pci_suspend,
	.resume = ide_pci_resume,
	};

	static int __init pdc202xx_ide_init(void)
	{
	return ide_pci_register_driver(&pdc202xx_pci_driver);
	}

	static void __exit pdc202xx_ide_exit(void)
	{
	pci_unregister_driver(&pdc202xx_pci_driver);
	}

	module_init(pdc202xx_ide_init);
	module_exit(pdc202xx_ide_exit);

	MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Bartlomiej Zolnierkiewicz");
	MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
	MODULE_LICENSE("GPL");