drivers/ide/pci/serverworks.c - kernel/msm-4.9 - Gitiles

 /*
  * linux/drivers/ide/pci/serverworks.c		Version 0.8	 25 Ebr 2003
  *
  * Copyright (C) 1998-2000 Michel Aubry
  * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
  * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
  * Portions copyright (c) 2001 Sun Microsystems
  *
  *
  * RCC/ServerWorks IDE driver for Linux
  *
  *   OSB4: `Open South Bridge' IDE Interface (fn 1)
  *         supports UDMA mode 2 (33 MB/s)
  *
  *   CSB5: `Champion South Bridge' IDE Interface (fn 1)
  *         all revisions support UDMA mode 4 (66 MB/s)
  *         revision A2.0 and up support UDMA mode 5 (100 MB/s)
  *
  *         *** The CSB5 does not provide ANY register ***
  *         *** to detect 80-conductor cable presence. ***
  *
  *   CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
  *
  *   HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
  *   controller same as the CSB6. Single channel ATA100 only.
  *
  * Documentation:
  *	Available under NDA only. Errata info very hard to get.
  *
  */

 #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/init.h>
 #include <linux/delay.h>

 #include <asm/io.h>

 #define SVWKS_CSB5_REVISION_NEW	0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
 #define SVWKS_CSB6_REVISION	0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */

 /* Seagate Barracuda ATA IV Family drives in UDMA mode 5
  * can overrun their FIFOs when used with the CSB5 */
 static const char *svwks_bad_ata100[] = {
 	"ST320011A",
 	"ST340016A",
 	"ST360021A",
 	"ST380021A",
 	NULL
 };

 static u8 svwks_revision = 0;
 static struct pci_dev *isa_dev;

 static int check_in_drive_lists (ide_drive_t *drive, const char **list)
 {
 	while (*list)
 		if (!strcmp(*list++, drive->id->model))
 			return 1;
 	return 0;
 }

 static u8 svwks_ratemask (ide_drive_t *drive)
 {
 	struct pci_dev *dev     = HWIF(drive)->pci_dev;
 	u8 mode = 0;

 	if (!svwks_revision)
 		pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);

 	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
 		return 2;
 	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
 		u32 reg = 0;
 		if (isa_dev)
 			pci_read_config_dword(isa_dev, 0x64, &reg);

 		/*
 		 *	Don't enable UDMA on disk devices for the moment
 		 */
 		if(drive->media == ide_disk)
 			return 0;
 		/* Check the OSB4 DMA33 enable bit */
 		return ((reg & 0x00004000) == 0x00004000) ? 1 : 0;
 	} else if (svwks_revision < SVWKS_CSB5_REVISION_NEW) {
 		return 1;
 	} else if (svwks_revision >= SVWKS_CSB5_REVISION_NEW) {
 		u8 btr = 0;
 		pci_read_config_byte(dev, 0x5A, &btr);
 		mode = btr & 0x3;
 		if (!eighty_ninty_three(drive))
 			mode = min(mode, (u8)1);
 		/* If someone decides to do UDMA133 on CSB5 the same
 		   issue will bite so be inclusive */
 		if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
 			mode = 2;
 	}
 	if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 	     (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
 	    (!(PCI_FUNC(dev->devfn) & 1)))
 		mode = 2;
 	return mode;
 }

 static u8 svwks_csb_check (struct pci_dev *dev)
 {
 	switch (dev->device) {
 		case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
 		case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
 		case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
 		case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
 			return 1;
 		default:
 			break;
 	}
 	return 0;
 }
 static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 {
 	static const u8 udma_modes[]		= { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
 	static const u8 dma_modes[]		= { 0x77, 0x21, 0x20 };
 	static const u8 pio_modes[]		= { 0x5d, 0x47, 0x34, 0x22, 0x20 };
 	static const u8 drive_pci[]		= { 0x41, 0x40, 0x43, 0x42 };
 	static const u8 drive_pci2[]		= { 0x45, 0x44, 0x47, 0x46 };

 	ide_hwif_t *hwif	= HWIF(drive);
 	struct pci_dev *dev	= hwif->pci_dev;
 	u8 speed;
 	u8 pio			= ide_get_best_pio_mode(drive, 255, 5, NULL);
 	u8 unit			= (drive->select.b.unit & 0x01);
 	u8 csb5			= svwks_csb_check(dev);
 	u8 ultra_enable		= 0, ultra_timing = 0;
 	u8 dma_timing		= 0, pio_timing = 0;
 	u16 csb5_pio		= 0;

 	if (xferspeed == 255)	/* PIO auto-tuning */
 		speed = XFER_PIO_0 + pio;
 	else
 		speed = ide_rate_filter(svwks_ratemask(drive), xferspeed);

 	/* If we are about to put a disk into UDMA mode we screwed up.
 	   Our code assumes we never _ever_ do this on an OSB4 */

 	if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 &&
 		drive->media == ide_disk && speed >= XFER_UDMA_0)
 			BUG();

 	pci_read_config_byte(dev, drive_pci[drive->dn], &pio_timing);
 	pci_read_config_byte(dev, drive_pci2[drive->dn], &dma_timing);
 	pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
 	pci_read_config_word(dev, 0x4A, &csb5_pio);
 	pci_read_config_byte(dev, 0x54, &ultra_enable);

 	/* Per Specified Design by OEM, and ASIC Architect */
 	if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 	    (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
 		if (!drive->init_speed) {
 			u8 dma_stat = hwif->INB(hwif->dma_status);

 dma_pio:
 			if (((ultra_enable << (7-drive->dn) & 0x80) == 0x80) &&
 			    ((dma_stat & (1<<(5+unit))) == (1<<(5+unit)))) {
 				drive->current_speed = drive->init_speed = XFER_UDMA_0 + udma_modes[(ultra_timing >> (4*unit)) & ~(0xF0)];
 				return 0;
 			} else if ((dma_timing) &&
 				   ((dma_stat&(1<<(5+unit)))==(1<<(5+unit)))) {
 				u8 dmaspeed = dma_timing;

 				dma_timing &= ~0xFF;
 				if ((dmaspeed & 0x20) == 0x20)
 					dmaspeed = XFER_MW_DMA_2;
 				else if ((dmaspeed & 0x21) == 0x21)
 					dmaspeed = XFER_MW_DMA_1;
 				else if ((dmaspeed & 0x77) == 0x77)
 					dmaspeed = XFER_MW_DMA_0;
 				else
 					goto dma_pio;
 				drive->current_speed = drive->init_speed = dmaspeed;
 				return 0;
 			} else if (pio_timing) {
 				u8 piospeed = pio_timing;

 				pio_timing &= ~0xFF;
 				if ((piospeed & 0x20) == 0x20)
 					piospeed = XFER_PIO_4;
 				else if ((piospeed & 0x22) == 0x22)
 					piospeed = XFER_PIO_3;
 				else if ((piospeed & 0x34) == 0x34)
 					piospeed = XFER_PIO_2;
 				else if ((piospeed & 0x47) == 0x47)
 					piospeed = XFER_PIO_1;
 				else if ((piospeed & 0x5d) == 0x5d)
 					piospeed = XFER_PIO_0;
 				else
 					goto oem_setup_failed;
 				drive->current_speed = drive->init_speed = piospeed;
 				return 0;
 			}
 		}
 	}

 oem_setup_failed:

 	pio_timing	&= ~0xFF;
 	dma_timing	&= ~0xFF;
 	ultra_timing	&= ~(0x0F << (4*unit));
 	ultra_enable	&= ~(0x01 << drive->dn);
 	csb5_pio	&= ~(0x0F << (4*drive->dn));

 	switch(speed) {
 		case XFER_PIO_4:
 		case XFER_PIO_3:
 		case XFER_PIO_2:
 		case XFER_PIO_1:
 		case XFER_PIO_0:
 			pio_timing |= pio_modes[speed - XFER_PIO_0];
 			csb5_pio   |= ((speed - XFER_PIO_0) << (4*drive->dn));
 			break;

 		case XFER_MW_DMA_2:
 		case XFER_MW_DMA_1:
 		case XFER_MW_DMA_0:
 			pio_timing |= pio_modes[pio];
 			csb5_pio   |= (pio << (4*drive->dn));
 			dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
 			break;

 		case XFER_UDMA_5:
 		case XFER_UDMA_4:
 		case XFER_UDMA_3:
 		case XFER_UDMA_2:
 		case XFER_UDMA_1:
 		case XFER_UDMA_0:
 			pio_timing   |= pio_modes[pio];
 			csb5_pio     |= (pio << (4*drive->dn));
 			dma_timing   |= dma_modes[2];
 			ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
 			ultra_enable |= (0x01 << drive->dn);
 		default:
 			break;
 	}

 	pci_write_config_byte(dev, drive_pci[drive->dn], pio_timing);
 	if (csb5)
 		pci_write_config_word(dev, 0x4A, csb5_pio);

 	pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
 	pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
 	pci_write_config_byte(dev, 0x54, ultra_enable);

 	return (ide_config_drive_speed(drive, speed));
 }

 static void config_chipset_for_pio (ide_drive_t *drive)
 {
 	u16 eide_pio_timing[6] = {960, 480, 240, 180, 120, 90};
 	u16 xfer_pio = drive->id->eide_pio_modes;
 	u8 timing, speed, pio;

 	pio = ide_get_best_pio_mode(drive, 255, 5, NULL);

 	if (xfer_pio > 4)
 		xfer_pio = 0;

 	if (drive->id->eide_pio_iordy > 0)
 		for (xfer_pio = 5;
 			xfer_pio>0 &&
 			drive->id->eide_pio_iordy>eide_pio_timing[xfer_pio];
 			xfer_pio--);
 	else
 		xfer_pio = (drive->id->eide_pio_modes & 4) ? 0x05 :
 			   (drive->id->eide_pio_modes & 2) ? 0x04 :
 			   (drive->id->eide_pio_modes & 1) ? 0x03 :
 			   (drive->id->tPIO & 2) ? 0x02 :
 			   (drive->id->tPIO & 1) ? 0x01 : xfer_pio;

 	timing = (xfer_pio >= pio) ? xfer_pio : pio;

 	switch(timing) {
 		case 4: speed = XFER_PIO_4;break;
 		case 3: speed = XFER_PIO_3;break;
 		case 2: speed = XFER_PIO_2;break;
 		case 1: speed = XFER_PIO_1;break;
 		default:
 			speed = (!drive->id->tPIO) ? XFER_PIO_0 : XFER_PIO_SLOW;
 			break;
 	}
 	(void) svwks_tune_chipset(drive, speed);
 	drive->current_speed = speed;
 }

 static void svwks_tune_drive (ide_drive_t *drive, u8 pio)
 {
 	if(pio == 255)
 		(void) svwks_tune_chipset(drive, 255);
 	else
 		(void) svwks_tune_chipset(drive, (XFER_PIO_0 + pio));
 }

 static int config_chipset_for_dma (ide_drive_t *drive)
 {
 	u8 speed = ide_dma_speed(drive, svwks_ratemask(drive));

 	if (!(speed))
 		speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);

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

 static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
 	struct hd_driveid *id	= drive->id;

 	drive->init_speed = 0;

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

 		if (ide_use_dma(drive)) {
 			if (config_chipset_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:
 		config_chipset_for_pio(drive);
 		//	hwif->tuneproc(drive, 5);
 		return hwif->ide_dma_off_quietly(drive);
 	}
 	/* IORDY not supported */
 	return 0;
 }

 /* This can go soon */

 static int svwks_ide_dma_end (ide_drive_t *drive)
 {
 	return __ide_dma_end(drive);
 }

 static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
 {
 	unsigned int reg;
 	u8 btr;

 	/* save revision id to determine DMA capability */
 	pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);

 	/* force Master Latency Timer value to 64 PCICLKs */
 	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);

 	/* OSB4 : South Bridge and IDE */
 	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
 		isa_dev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 			  PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
 		if (isa_dev) {
 			pci_read_config_dword(isa_dev, 0x64, &reg);
 			reg &= ~0x00002000; /* disable 600ns interrupt mask */
 			if(!(reg & 0x00004000))
 				printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
 			reg |=  0x00004000; /* enable UDMA/33 support */
 			pci_write_config_dword(isa_dev, 0x64, reg);
 		}
 	}

 	/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
 	else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
 		 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 		 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {

 		/* Third Channel Test */
 		if (!(PCI_FUNC(dev->devfn) & 1)) {
 			struct pci_dev * findev = NULL;
 			u32 reg4c = 0;
 			findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 				PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
 			if (findev) {
 				pci_read_config_dword(findev, 0x4C, &reg4c);
 				reg4c &= ~0x000007FF;
 				reg4c |=  0x00000040;
 				reg4c |=  0x00000020;
 				pci_write_config_dword(findev, 0x4C, reg4c);
 			}
 			outb_p(0x06, 0x0c00);
 			dev->irq = inb_p(0x0c01);
 		} else {
 			struct pci_dev * findev = NULL;
 			u8 reg41 = 0;

 			findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
 					PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
 			if (findev) {
 				pci_read_config_byte(findev, 0x41, &reg41);
 				reg41 &= ~0x40;
 				pci_write_config_byte(findev, 0x41, reg41);
 			}
 			/*
 			 * This is a device pin issue on CSB6.
 			 * Since there will be a future raid mode,
 			 * early versions of the chipset require the
 			 * interrupt pin to be set, and it is a compatibility
 			 * mode issue.
 			 */
 			if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
 				dev->irq = 0;
 		}
 //		pci_read_config_dword(dev, 0x40, &pioreg)
 //		pci_write_config_dword(dev, 0x40, 0x99999999);
 //		pci_read_config_dword(dev, 0x44, &dmareg);
 //		pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
 		/* setup the UDMA Control register
 		 *
 		 * 1. clear bit 6 to enable DMA
 		 * 2. enable DMA modes with bits 0-1
 		 * 	00 : legacy
 		 * 	01 : udma2
 		 * 	10 : udma2/udma4
 		 * 	11 : udma2/udma4/udma5
 		 */
 		pci_read_config_byte(dev, 0x5A, &btr);
 		btr &= ~0x40;
 		if (!(PCI_FUNC(dev->devfn) & 1))
 			btr |= 0x2;
 		else
 			btr |= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
 		pci_write_config_byte(dev, 0x5A, btr);
 	}
 	/* Setup HT1000 SouthBridge Controller - Single Channel Only */
 	else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
 		pci_read_config_byte(dev, 0x5A, &btr);
 		btr &= ~0x40;
 		btr |= 0x3;
 		pci_write_config_byte(dev, 0x5A, btr);
 	}

 	return dev->irq;
 }

 static unsigned int __devinit ata66_svwks_svwks (ide_hwif_t *hwif)
 {
 	return 1;
 }

 /* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
  * of the subsystem device ID indicate presence of an 80-pin cable.
  * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
  * Bit 15 set   = secondary IDE channel has 80-pin cable.
  * Bit 14 clear = primary IDE channel does not have 80-pin cable.
  * Bit 14 set   = primary IDE channel has 80-pin cable.
  */
 static unsigned int __devinit ata66_svwks_dell (ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = hwif->pci_dev;
 	if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
 	    dev->vendor	== PCI_VENDOR_ID_SERVERWORKS &&
 	    (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
 	     dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
 		return ((1 << (hwif->channel + 14)) &
 			dev->subsystem_device) ? 1 : 0;
 	return 0;
 }

 /* Sun Cobalt Alpine hardware avoids the 80-pin cable
  * detect issue by attaching the drives directly to the board.
  * This check follows the Dell precedent (how scary is that?!)
  *
  * WARNING: this only works on Alpine hardware!
  */
 static unsigned int __devinit ata66_svwks_cobalt (ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = hwif->pci_dev;
 	if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
 	    dev->vendor	== PCI_VENDOR_ID_SERVERWORKS &&
 	    dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
 		return ((1 << (hwif->channel + 14)) &
 			dev->subsystem_device) ? 1 : 0;
 	return 0;
 }

 static unsigned int __devinit ata66_svwks (ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = hwif->pci_dev;

 	/* Server Works */
 	if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
 		return ata66_svwks_svwks (hwif);

 	/* Dell PowerEdge */
 	if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
 		return ata66_svwks_dell (hwif);

 	/* Cobalt Alpine */
 	if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
 		return ata66_svwks_cobalt (hwif);

 	/* Per Specified Design by OEM, and ASIC Architect */
 	if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 	    (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
 		return 1;

 	return 0;
 }

 static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
 {
 	u8 dma_stat = 0;

 	if (!hwif->irq)
 		hwif->irq = hwif->channel ? 15 : 14;

 	hwif->tuneproc = &svwks_tune_drive;
 	hwif->speedproc = &svwks_tune_chipset;

 	hwif->atapi_dma = 1;

 	if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 		hwif->ultra_mask = 0x3f;

 	hwif->mwdma_mask = 0x07;

 	hwif->autodma = 0;

 	if (!hwif->dma_base) {
 		hwif->drives[0].autotune = 1;
 		hwif->drives[1].autotune = 1;
 		return;
 	}

 	hwif->ide_dma_check = &svwks_config_drive_xfer_rate;
 	if (hwif->pci_dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 		hwif->ide_dma_end = &svwks_ide_dma_end;
 	else if (!(hwif->udma_four))
 		hwif->udma_four = ata66_svwks(hwif);
 	if (!noautodma)
 		hwif->autodma = 1;

 	dma_stat = hwif->INB(hwif->dma_status);
 	hwif->drives[0].autodma = (dma_stat & 0x20);
 	hwif->drives[1].autodma = (dma_stat & 0x40);
 	hwif->drives[0].autotune = (!(dma_stat & 0x20));
 	hwif->drives[1].autotune = (!(dma_stat & 0x40));
 }

 /*
  * We allow the BM-DMA driver to only work on enabled interfaces.
  */
 static void __devinit init_dma_svwks (ide_hwif_t *hwif, unsigned long dmabase)
 {
 	struct pci_dev *dev = hwif->pci_dev;

 	if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
 	     (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
 	    (!(PCI_FUNC(dev->devfn) & 1)) && (hwif->channel))
 		return;

 	ide_setup_dma(hwif, dmabase, 8);
 }

 static int __devinit init_setup_svwks (struct pci_dev *dev, ide_pci_device_t *d)
 {
 	return ide_setup_pci_device(dev, d);
 }

 static int __devinit init_setup_csb6 (struct pci_dev *dev, ide_pci_device_t *d)
 {
 	if (!(PCI_FUNC(dev->devfn) & 1)) {
 		d->bootable = NEVER_BOARD;
 		if (dev->resource[0].start == 0x01f1)
 			d->bootable = ON_BOARD;
 	}

 	d->channels = ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE ||
 			dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) &&
 		       (!(PCI_FUNC(dev->devfn) & 1))) ? 1 : 2;

 	return ide_setup_pci_device(dev, d);
 }

 static ide_pci_device_t serverworks_chipsets[] __devinitdata = {
 	{	/* 0 */
 		.name		= "SvrWks OSB4",
 		.init_setup	= init_setup_svwks,
 		.init_chipset	= init_chipset_svwks,
 		.init_hwif	= init_hwif_svwks,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
 	},{	/* 1 */
 		.name		= "SvrWks CSB5",
 		.init_setup	= init_setup_svwks,
 		.init_chipset	= init_chipset_svwks,
 		.init_hwif	= init_hwif_svwks,
 		.init_dma	= init_dma_svwks,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
 	},{	/* 2 */
 		.name		= "SvrWks CSB6",
 		.init_setup	= init_setup_csb6,
 		.init_chipset	= init_chipset_svwks,
 		.init_hwif	= init_hwif_svwks,
 		.init_dma	= init_dma_svwks,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
 	},{	/* 3 */
 		.name		= "SvrWks CSB6",
 		.init_setup	= init_setup_csb6,
 		.init_chipset	= init_chipset_svwks,
 		.init_hwif	= init_hwif_svwks,
 		.init_dma	= init_dma_svwks,
 		.channels	= 1,	/* 2 */
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
 	},{	/* 4 */
 		.name		= "SvrWks HT1000",
 		.init_setup	= init_setup_svwks,
 		.init_chipset	= init_chipset_svwks,
 		.init_hwif	= init_hwif_svwks,
 		.init_dma	= init_dma_svwks,
 		.channels	= 1,	/* 2 */
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
 	}
 };

 /**
  *	svwks_init_one	-	called when a OSB/CSB is found
  *	@dev: the svwks 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 svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	ide_pci_device_t *d = &serverworks_chipsets[id->driver_data];

 	return d->init_setup(dev, d);
 }

 static struct pci_device_id svwks_pci_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1},
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3},
 	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4},
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);

 static struct pci_driver driver = {
 	.name		= "Serverworks_IDE",
 	.id_table	= svwks_pci_tbl,
 	.probe		= svwks_init_one,
 };

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

 module_init(svwks_ide_init);

 MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
 MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
 MODULE_LICENSE("GPL");
	/*
	* linux/drivers/ide/pci/serverworks.c Version 0.8 25 Ebr 2003
	*
	* Copyright (C) 1998-2000 Michel Aubry
	* Copyright (C) 1998-2000 Andrzej Krzysztofowicz
	* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
	* Portions copyright (c) 2001 Sun Microsystems
	*
	*
	* RCC/ServerWorks IDE driver for Linux
	*
	* OSB4: `Open South Bridge' IDE Interface (fn 1)
	* supports UDMA mode 2 (33 MB/s)
	*
	* CSB5: `Champion South Bridge' IDE Interface (fn 1)
	* all revisions support UDMA mode 4 (66 MB/s)
	* revision A2.0 and up support UDMA mode 5 (100 MB/s)
	*
	* * The CSB5 does not provide ANY register *
	* * to detect 80-conductor cable presence. *
	*
	* CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
	*
	* HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
	* controller same as the CSB6. Single channel ATA100 only.
	*
	* Documentation:
	* Available under NDA only. Errata info very hard to get.
	*
	*/

	#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/init.h>
	#include <linux/delay.h>

	#include <asm/io.h>

	#define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
	#define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */

	/* Seagate Barracuda ATA IV Family drives in UDMA mode 5
	* can overrun their FIFOs when used with the CSB5 */
	static const char *svwks_bad_ata100[] = {
	"ST320011A",
	"ST340016A",
	"ST360021A",
	"ST380021A",
	NULL
	};

	static u8 svwks_revision = 0;
	static struct pci_dev *isa_dev;

	static int check_in_drive_lists (ide_drive_t drive, const char *list)
	{
	while (*list)
	if (!strcmp(*list++, drive->id->model))
	return 1;
	return 0;
	}

	static u8 svwks_ratemask (ide_drive_t *drive)
	{
	struct pci_dev *dev = HWIF(drive)->pci_dev;
	u8 mode = 0;

	if (!svwks_revision)
	pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);

	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
	return 2;
	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
	u32 reg = 0;
	if (isa_dev)
	pci_read_config_dword(isa_dev, 0x64, &reg);

	/*
	* Don't enable UDMA on disk devices for the moment
	*/
	if(drive->media == ide_disk)
	return 0;
	/* Check the OSB4 DMA33 enable bit */
	return ((reg & 0x00004000) == 0x00004000) ? 1 : 0;
	} else if (svwks_revision < SVWKS_CSB5_REVISION_NEW) {
	return 1;
	} else if (svwks_revision >= SVWKS_CSB5_REVISION_NEW) {
	u8 btr = 0;
	pci_read_config_byte(dev, 0x5A, &btr);
	mode = btr & 0x3;
	if (!eighty_ninty_three(drive))
	mode = min(mode, (u8)1);
	/* If someone decides to do UDMA133 on CSB5 the same
	issue will bite so be inclusive */
	if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
	mode = 2;
	}
	if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) \|\|
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
	(!(PCI_FUNC(dev->devfn) & 1)))
	mode = 2;
	return mode;
	}

	static u8 svwks_csb_check (struct pci_dev *dev)
	{
	switch (dev->device) {
	case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
	case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
	case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
	case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
	return 1;
	default:
	break;
	}
	return 0;
	}
	static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
	{
	static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
	static const u8 dma_modes[] = { 0x77, 0x21, 0x20 };
	static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
	static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
	static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 };

	ide_hwif_t *hwif = HWIF(drive);
	struct pci_dev *dev = hwif->pci_dev;
	u8 speed;
	u8 pio = ide_get_best_pio_mode(drive, 255, 5, NULL);
	u8 unit = (drive->select.b.unit & 0x01);
	u8 csb5 = svwks_csb_check(dev);
	u8 ultra_enable = 0, ultra_timing = 0;
	u8 dma_timing = 0, pio_timing = 0;
	u16 csb5_pio = 0;

	if (xferspeed == 255) /* PIO auto-tuning */
	speed = XFER_PIO_0 + pio;
	else
	speed = ide_rate_filter(svwks_ratemask(drive), xferspeed);

	/* If we are about to put a disk into UDMA mode we screwed up.
	Our code assumes we never _ever_ do this on an OSB4 */

	if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 &&
	drive->media == ide_disk && speed >= XFER_UDMA_0)
	BUG();

	pci_read_config_byte(dev, drive_pci[drive->dn], &pio_timing);
	pci_read_config_byte(dev, drive_pci2[drive->dn], &dma_timing);
	pci_read_config_byte(dev, (0x56\|hwif->channel), &ultra_timing);
	pci_read_config_word(dev, 0x4A, &csb5_pio);
	pci_read_config_byte(dev, 0x54, &ultra_enable);

	/* Per Specified Design by OEM, and ASIC Architect */
	if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) \|\|
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
	if (!drive->init_speed) {
	u8 dma_stat = hwif->INB(hwif->dma_status);

	dma_pio:
	if (((ultra_enable << (7-drive->dn) & 0x80) == 0x80) &&
	((dma_stat & (1<<(5+unit))) == (1<<(5+unit)))) {
	drive->current_speed = drive->init_speed = XFER_UDMA_0 + udma_modes[(ultra_timing >> (4*unit)) & ~(0xF0)];
	return 0;
	} else if ((dma_timing) &&
	((dma_stat&(1<<(5+unit)))==(1<<(5+unit)))) {
	u8 dmaspeed = dma_timing;

	dma_timing &= ~0xFF;
	if ((dmaspeed & 0x20) == 0x20)
	dmaspeed = XFER_MW_DMA_2;
	else if ((dmaspeed & 0x21) == 0x21)
	dmaspeed = XFER_MW_DMA_1;
	else if ((dmaspeed & 0x77) == 0x77)
	dmaspeed = XFER_MW_DMA_0;
	else
	goto dma_pio;
	drive->current_speed = drive->init_speed = dmaspeed;
	return 0;
	} else if (pio_timing) {
	u8 piospeed = pio_timing;

	pio_timing &= ~0xFF;
	if ((piospeed & 0x20) == 0x20)
	piospeed = XFER_PIO_4;
	else if ((piospeed & 0x22) == 0x22)
	piospeed = XFER_PIO_3;
	else if ((piospeed & 0x34) == 0x34)
	piospeed = XFER_PIO_2;
	else if ((piospeed & 0x47) == 0x47)
	piospeed = XFER_PIO_1;
	else if ((piospeed & 0x5d) == 0x5d)
	piospeed = XFER_PIO_0;
	else
	goto oem_setup_failed;
	drive->current_speed = drive->init_speed = piospeed;
	return 0;
	}
	}
	}

	oem_setup_failed:

	pio_timing &= ~0xFF;
	dma_timing &= ~0xFF;
	ultra_timing &= ~(0x0F << (4*unit));
	ultra_enable &= ~(0x01 << drive->dn);
	csb5_pio &= ~(0x0F << (4*drive->dn));

	switch(speed) {
	case XFER_PIO_4:
	case XFER_PIO_3:
	case XFER_PIO_2:
	case XFER_PIO_1:
	case XFER_PIO_0:
	pio_timing \|= pio_modes[speed - XFER_PIO_0];
	csb5_pio \|= ((speed - XFER_PIO_0) << (4*drive->dn));
	break;

	case XFER_MW_DMA_2:
	case XFER_MW_DMA_1:
	case XFER_MW_DMA_0:
	pio_timing \|= pio_modes[pio];
	csb5_pio \|= (pio << (4*drive->dn));
	dma_timing \|= dma_modes[speed - XFER_MW_DMA_0];
	break;

	case XFER_UDMA_5:
	case XFER_UDMA_4:
	case XFER_UDMA_3:
	case XFER_UDMA_2:
	case XFER_UDMA_1:
	case XFER_UDMA_0:
	pio_timing \|= pio_modes[pio];
	csb5_pio \|= (pio << (4*drive->dn));
	dma_timing \|= dma_modes[2];
	ultra_timing \|= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
	ultra_enable \|= (0x01 << drive->dn);
	default:
	break;
	}

	pci_write_config_byte(dev, drive_pci[drive->dn], pio_timing);
	if (csb5)
	pci_write_config_word(dev, 0x4A, csb5_pio);

	pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
	pci_write_config_byte(dev, (0x56\|hwif->channel), ultra_timing);
	pci_write_config_byte(dev, 0x54, ultra_enable);

	return (ide_config_drive_speed(drive, speed));
	}

	static void config_chipset_for_pio (ide_drive_t *drive)
	{
	u16 eide_pio_timing[6] = {960, 480, 240, 180, 120, 90};
	u16 xfer_pio = drive->id->eide_pio_modes;
	u8 timing, speed, pio;

	pio = ide_get_best_pio_mode(drive, 255, 5, NULL);

	if (xfer_pio > 4)
	xfer_pio = 0;

	if (drive->id->eide_pio_iordy > 0)
	for (xfer_pio = 5;
	xfer_pio>0 &&
	drive->id->eide_pio_iordy>eide_pio_timing[xfer_pio];
	xfer_pio--);
	else
	xfer_pio = (drive->id->eide_pio_modes & 4) ? 0x05 :
	(drive->id->eide_pio_modes & 2) ? 0x04 :
	(drive->id->eide_pio_modes & 1) ? 0x03 :
	(drive->id->tPIO & 2) ? 0x02 :
	(drive->id->tPIO & 1) ? 0x01 : xfer_pio;

	timing = (xfer_pio >= pio) ? xfer_pio : pio;

	switch(timing) {
	case 4: speed = XFER_PIO_4;break;
	case 3: speed = XFER_PIO_3;break;
	case 2: speed = XFER_PIO_2;break;
	case 1: speed = XFER_PIO_1;break;
	default:
	speed = (!drive->id->tPIO) ? XFER_PIO_0 : XFER_PIO_SLOW;
	break;
	}
	(void) svwks_tune_chipset(drive, speed);
	drive->current_speed = speed;
	}

	static void svwks_tune_drive (ide_drive_t *drive, u8 pio)
	{
	if(pio == 255)
	(void) svwks_tune_chipset(drive, 255);
	else
	(void) svwks_tune_chipset(drive, (XFER_PIO_0 + pio));
	}

	static int config_chipset_for_dma (ide_drive_t *drive)
	{
	u8 speed = ide_dma_speed(drive, svwks_ratemask(drive));

	if (!(speed))
	speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);

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

	static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
	{
	ide_hwif_t *hwif = HWIF(drive);
	struct hd_driveid *id = drive->id;

	drive->init_speed = 0;

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

	if (ide_use_dma(drive)) {
	if (config_chipset_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:
	config_chipset_for_pio(drive);
	// hwif->tuneproc(drive, 5);
	return hwif->ide_dma_off_quietly(drive);
	}
	/* IORDY not supported */
	return 0;
	}

	/* This can go soon */

	static int svwks_ide_dma_end (ide_drive_t *drive)
	{
	return __ide_dma_end(drive);
	}

	static unsigned int __devinit init_chipset_svwks (struct pci_dev dev, const char name)
	{
	unsigned int reg;
	u8 btr;

	/* save revision id to determine DMA capability */
	pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);

	/* force Master Latency Timer value to 64 PCICLKs */
	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);

	/* OSB4 : South Bridge and IDE */
	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
	isa_dev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
	PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
	if (isa_dev) {
	pci_read_config_dword(isa_dev, 0x64, &reg);
	reg &= ~0x00002000; /* disable 600ns interrupt mask */
	if(!(reg & 0x00004000))
	printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
	reg \|= 0x00004000; /* enable UDMA/33 support */
	pci_write_config_dword(isa_dev, 0x64, reg);
	}
	}

	/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
	else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) \|\|
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) \|\|
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {

	/* Third Channel Test */
	if (!(PCI_FUNC(dev->devfn) & 1)) {
	struct pci_dev * findev = NULL;
	u32 reg4c = 0;
	findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
	PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
	if (findev) {
	pci_read_config_dword(findev, 0x4C, &reg4c);
	reg4c &= ~0x000007FF;
	reg4c \|= 0x00000040;
	reg4c \|= 0x00000020;
	pci_write_config_dword(findev, 0x4C, reg4c);
	}
	outb_p(0x06, 0x0c00);
	dev->irq = inb_p(0x0c01);
	} else {
	struct pci_dev * findev = NULL;
	u8 reg41 = 0;

	findev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
	PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
	if (findev) {
	pci_read_config_byte(findev, 0x41, &reg41);
	reg41 &= ~0x40;
	pci_write_config_byte(findev, 0x41, reg41);
	}
	/*
	* This is a device pin issue on CSB6.
	* Since there will be a future raid mode,
	* early versions of the chipset require the
	* interrupt pin to be set, and it is a compatibility
	* mode issue.
	*/
	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
	dev->irq = 0;
	}
	// pci_read_config_dword(dev, 0x40, &pioreg)
	// pci_write_config_dword(dev, 0x40, 0x99999999);
	// pci_read_config_dword(dev, 0x44, &dmareg);
	// pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
	/* setup the UDMA Control register
	*
	* 1. clear bit 6 to enable DMA
	* 2. enable DMA modes with bits 0-1
	* 00 : legacy
	* 01 : udma2
	* 10 : udma2/udma4
	* 11 : udma2/udma4/udma5
	*/
	pci_read_config_byte(dev, 0x5A, &btr);
	btr &= ~0x40;
	if (!(PCI_FUNC(dev->devfn) & 1))
	btr \|= 0x2;
	else
	btr \|= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
	pci_write_config_byte(dev, 0x5A, btr);
	}
	/* Setup HT1000 SouthBridge Controller - Single Channel Only */
	else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
	pci_read_config_byte(dev, 0x5A, &btr);
	btr &= ~0x40;
	btr \|= 0x3;
	pci_write_config_byte(dev, 0x5A, btr);
	}

	return dev->irq;
	}

	static unsigned int __devinit ata66_svwks_svwks (ide_hwif_t *hwif)
	{
	return 1;
	}

	/* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
	* of the subsystem device ID indicate presence of an 80-pin cable.
	* Bit 15 clear = secondary IDE channel does not have 80-pin cable.
	* Bit 15 set = secondary IDE channel has 80-pin cable.
	* Bit 14 clear = primary IDE channel does not have 80-pin cable.
	* Bit 14 set = primary IDE channel has 80-pin cable.
	*/
	static unsigned int __devinit ata66_svwks_dell (ide_hwif_t *hwif)
	{
	struct pci_dev *dev = hwif->pci_dev;
	if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
	dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE \|\|
	dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
	return ((1 << (hwif->channel + 14)) &
	dev->subsystem_device) ? 1 : 0;
	return 0;
	}

	/* Sun Cobalt Alpine hardware avoids the 80-pin cable
	* detect issue by attaching the drives directly to the board.
	* This check follows the Dell precedent (how scary is that?!)
	*
	* WARNING: this only works on Alpine hardware!
	*/
	static unsigned int __devinit ata66_svwks_cobalt (ide_hwif_t *hwif)
	{
	struct pci_dev *dev = hwif->pci_dev;
	if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
	dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
	dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
	return ((1 << (hwif->channel + 14)) &
	dev->subsystem_device) ? 1 : 0;
	return 0;
	}

	static unsigned int __devinit ata66_svwks (ide_hwif_t *hwif)
	{
	struct pci_dev *dev = hwif->pci_dev;

	/* Server Works */
	if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
	return ata66_svwks_svwks (hwif);

	/* Dell PowerEdge */
	if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
	return ata66_svwks_dell (hwif);

	/* Cobalt Alpine */
	if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
	return ata66_svwks_cobalt (hwif);

	/* Per Specified Design by OEM, and ASIC Architect */
	if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) \|\|
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
	return 1;

	return 0;
	}

	static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
	{
	u8 dma_stat = 0;

	if (!hwif->irq)
	hwif->irq = hwif->channel ? 15 : 14;

	hwif->tuneproc = &svwks_tune_drive;
	hwif->speedproc = &svwks_tune_chipset;

	hwif->atapi_dma = 1;

	if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
	hwif->ultra_mask = 0x3f;

	hwif->mwdma_mask = 0x07;

	hwif->autodma = 0;

	if (!hwif->dma_base) {
	hwif->drives[0].autotune = 1;
	hwif->drives[1].autotune = 1;
	return;
	}

	hwif->ide_dma_check = &svwks_config_drive_xfer_rate;
	if (hwif->pci_dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
	hwif->ide_dma_end = &svwks_ide_dma_end;
	else if (!(hwif->udma_four))
	hwif->udma_four = ata66_svwks(hwif);
	if (!noautodma)
	hwif->autodma = 1;

	dma_stat = hwif->INB(hwif->dma_status);
	hwif->drives[0].autodma = (dma_stat & 0x20);
	hwif->drives[1].autodma = (dma_stat & 0x40);
	hwif->drives[0].autotune = (!(dma_stat & 0x20));
	hwif->drives[1].autotune = (!(dma_stat & 0x40));
	}

	/*
	* We allow the BM-DMA driver to only work on enabled interfaces.
	*/
	static void __devinit init_dma_svwks (ide_hwif_t *hwif, unsigned long dmabase)
	{
	struct pci_dev *dev = hwif->pci_dev;

	if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) \|\|
	(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
	(!(PCI_FUNC(dev->devfn) & 1)) && (hwif->channel))
	return;

	ide_setup_dma(hwif, dmabase, 8);
	}

	static int __devinit init_setup_svwks (struct pci_dev dev, ide_pci_device_t d)
	{
	return ide_setup_pci_device(dev, d);
	}

	static int __devinit init_setup_csb6 (struct pci_dev dev, ide_pci_device_t d)
	{
	if (!(PCI_FUNC(dev->devfn) & 1)) {
	d->bootable = NEVER_BOARD;
	if (dev->resource[0].start == 0x01f1)
	d->bootable = ON_BOARD;
	}

	d->channels = ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE \|\|
	dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) &&
	(!(PCI_FUNC(dev->devfn) & 1))) ? 1 : 2;

	return ide_setup_pci_device(dev, d);
	}

	static ide_pci_device_t serverworks_chipsets[] __devinitdata = {
	{ /* 0 */
	.name = "SvrWks OSB4",
	.init_setup = init_setup_svwks,
	.init_chipset = init_chipset_svwks,
	.init_hwif = init_hwif_svwks,
	.channels = 2,
	.autodma = AUTODMA,
	.bootable = ON_BOARD,
	},{ /* 1 */
	.name = "SvrWks CSB5",
	.init_setup = init_setup_svwks,
	.init_chipset = init_chipset_svwks,
	.init_hwif = init_hwif_svwks,
	.init_dma = init_dma_svwks,
	.channels = 2,
	.autodma = AUTODMA,
	.bootable = ON_BOARD,
	},{ /* 2 */
	.name = "SvrWks CSB6",
	.init_setup = init_setup_csb6,
	.init_chipset = init_chipset_svwks,
	.init_hwif = init_hwif_svwks,
	.init_dma = init_dma_svwks,
	.channels = 2,
	.autodma = AUTODMA,
	.bootable = ON_BOARD,
	},{ /* 3 */
	.name = "SvrWks CSB6",
	.init_setup = init_setup_csb6,
	.init_chipset = init_chipset_svwks,
	.init_hwif = init_hwif_svwks,
	.init_dma = init_dma_svwks,
	.channels = 1, /* 2 */
	.autodma = AUTODMA,
	.bootable = ON_BOARD,
	},{ /* 4 */
	.name = "SvrWks HT1000",
	.init_setup = init_setup_svwks,
	.init_chipset = init_chipset_svwks,
	.init_hwif = init_hwif_svwks,
	.init_dma = init_dma_svwks,
	.channels = 1, /* 2 */
	.autodma = AUTODMA,
	.bootable = ON_BOARD,
	}
	};

	/**
	* svwks_init_one - called when a OSB/CSB is found
	* @dev: the svwks 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 svwks_init_one(struct pci_dev dev, const struct pci_device_id id)
	{
	ide_pci_device_t *d = &serverworks_chipsets[id->driver_data];

	return d->init_setup(dev, d);
	}

	static struct pci_device_id svwks_pci_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 1},
	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 3},
	{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4},
	{ 0, },
	};
	MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);

	static struct pci_driver driver = {
	.name = "Serverworks_IDE",
	.id_table = svwks_pci_tbl,
	.probe = svwks_init_one,
	};

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

	module_init(svwks_ide_init);

	MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
	MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
	MODULE_LICENSE("GPL");