[deliverable/linux.git] / drivers / ide / pci / pdc202xx_old.c

/*
 *  linux/drivers/ide/pci/pdc202xx_old.c	Version 0.52	Aug 27, 2007
 *
 *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2006-2007		MontaVista Software, Inc.
 *  Copyright (C) 2007			Bartlomiej Zolnierkiewicz
 *
 *  Promise Ultra33 cards with BIOS v1.20 through 1.28 will need this
 *  compiled into the kernel if you have more than one card installed.
 *  Note that BIOS v1.29 is reported to fix the problem.  Since this is
 *  safe chipset tuning, including this support is harmless
 *
 *  Promise Ultra66 cards with BIOS v1.11 this
 *  compiled into the kernel if you have more than one card installed.
 *
 *  Promise Ultra100 cards.
 *
 *  The latest chipset code will support the following ::
 *  Three Ultra33 controllers and 12 drives.
 *  8 are UDMA supported and 4 are limited to DMA mode 2 multi-word.
 *  The 8/4 ratio is a BIOS code limit by promise.
 *
 *  UNLESS you enable "CONFIG_PDC202XX_BURST"
 *
 */

/*
 *  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/timer.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/ide.h>

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

#define PDC202XX_DEBUG_DRIVE_INFO	0

static const char *pdc_quirk_drives[] = {
	"QUANTUM FIREBALLlct08 08",
	"QUANTUM FIREBALLP KA6.4",
	"QUANTUM FIREBALLP KA9.1",
	"QUANTUM FIREBALLP LM20.4",
	"QUANTUM FIREBALLP KX13.6",
	"QUANTUM FIREBALLP KX20.5",
	"QUANTUM FIREBALLP KX27.3",
	"QUANTUM FIREBALLP LM20.5",
	NULL
};

static void pdc_old_disable_66MHz_clock(ide_hwif_t *);

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

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

#if PDC202XX_DEBUG_DRIVE_INFO
	u32			drive_conf = 0;
	pci_read_config_dword(dev, drive_pci, &drive_conf);
#endif

	/*
	 * TODO: do this once per channel
	 */
	if (dev->device != PCI_DEVICE_ID_PROMISE_20246)
		pdc_old_disable_66MHz_clock(hwif);

	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 (drive->id->capability & 4)
			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);
	}

#if PDC202XX_DEBUG_DRIVE_INFO
	printk(KERN_DEBUG "%s: %s drive%d 0x%08x ",
		drive->name, ide_xfer_verbose(speed),
		drive->dn, drive_conf);
	pci_read_config_dword(dev, drive_pci, &drive_conf);
	printk("0x%08x\n", drive_conf);
#endif
}

static void pdc202xx_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
	pdc202xx_set_mode(drive, XFER_PIO_0 + pio);
}

static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
{
	u16 CIS = 0, mask = (hwif->channel) ? (1<<11) : (1<<10);

	pci_read_config_word(hwif->pci_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 int pdc202xx_quirkproc (ide_drive_t *drive)
{
	const char **list, *model = drive->id->model;

	for (list = pdc_quirk_drives; *list != NULL; list++)
		if (strstr(model, *list) != NULL)
			return 2;
	return 0;
}

static void pdc202xx_old_ide_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->addressing == 1) {
		struct request *rq	= HWGROUP(drive)->rq;
		ide_hwif_t *hwif	= HWIF(drive);
		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 = (rq->nr_sectors << 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_old_ide_dma_end(ide_drive_t *drive)
{
	if (drive->media != ide_disk || drive->addressing == 1) {
		ide_hwif_t *hwif	= HWIF(drive);
		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 pdc202xx_old_ide_dma_test_irq(ide_drive_t *drive)
{
	ide_hwif_t *hwif	= HWIF(drive);
	unsigned long high_16	= hwif->extra_base - 16;
	u8 dma_stat		= inb(hwif->dma_status);
	u8 sc1d			= inb(high_16 + 0x001d);

	if (hwif->channel) {
		/* bit7: Error, bit6: Interrupting, bit5: FIFO Full, bit4: FIFO Empty */
		if ((sc1d & 0x50) == 0x50)
			goto somebody_else;
		else if ((sc1d & 0x40) == 0x40)
			return (dma_stat & 4) == 4;
	} else {
		/* bit3: Error, bit2: Interrupting, bit1: FIFO Full, bit0: FIFO Empty */
		if ((sc1d & 0x05) == 0x05)
			goto somebody_else;
		else if ((sc1d & 0x04) == 0x04)
			return (dma_stat & 4) == 4;
	}
somebody_else:
	return (dma_stat & 4) == 4;	/* return 1 if INTR asserted */
}

static void pdc202xx_dma_lost_irq(ide_drive_t *drive)
{
	ide_hwif_t *hwif = HWIF(drive);

	if (hwif->resetproc != NULL)
		hwif->resetproc(drive);

	ide_dma_lost_irq(drive);
}

static void pdc202xx_dma_timeout(ide_drive_t *drive)
{
	ide_hwif_t *hwif = HWIF(drive);

	if (hwif->resetproc != NULL)
		hwif->resetproc(drive);

	ide_dma_timeout(drive);
}

static void pdc202xx_reset_host (ide_hwif_t *hwif)
{
	unsigned long high_16	= hwif->extra_base - 16;
	u8 udma_speed_flag	= inb(high_16 | 0x001f);

	outb(udma_speed_flag | 0x10, high_16 | 0x001f);
	mdelay(100);
	outb(udma_speed_flag & ~0x10, high_16 | 0x001f);
	mdelay(2000);	/* 2 seconds ?! */

	printk(KERN_WARNING "PDC202XX: %s channel reset.\n",
		hwif->channel ? "Secondary" : "Primary");
}

static void pdc202xx_reset (ide_drive_t *drive)
{
	ide_hwif_t *hwif	= HWIF(drive);
	ide_hwif_t *mate	= hwif->mate;

	pdc202xx_reset_host(hwif);
	pdc202xx_reset_host(mate);

	ide_set_max_pio(drive);
}

static unsigned int __devinit init_chipset_pdc202xx(struct pci_dev *dev,
							const char *name)
{
	return dev->irq;
}

static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
{
	hwif->set_pio_mode = &pdc202xx_set_pio_mode;
	hwif->set_dma_mode = &pdc202xx_set_mode;

	hwif->quirkproc = &pdc202xx_quirkproc;

	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246)
		hwif->resetproc = &pdc202xx_reset;

	if (hwif->dma_base == 0)
		return;

	hwif->dma_lost_irq = &pdc202xx_dma_lost_irq;
	hwif->dma_timeout = &pdc202xx_dma_timeout;

	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246) {
		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
			hwif->cbl = pdc202xx_old_cable_detect(hwif);

		hwif->dma_start = &pdc202xx_old_ide_dma_start;
		hwif->ide_dma_end = &pdc202xx_old_ide_dma_end;
	} 
	hwif->ide_dma_test_irq = &pdc202xx_old_ide_dma_test_irq;
}

static void __devinit init_dma_pdc202xx(ide_hwif_t *hwif, unsigned long dmabase)
{
	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;

	if (hwif->channel) {
		ide_setup_dma(hwif, dmabase, 8);
		return;
	}

	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", hwif->cds->name,
		(udma_speed_flag & 1) ? "EN" : "DIS",
		(primary_mode & 1) ? "MASTER" : "PCI",
		(secondary_mode & 1) ? "MASTER" : "PCI" );

#ifdef CONFIG_PDC202XX_BURST
	if (!(udma_speed_flag & 1)) {
		printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
			hwif->cds->name, udma_speed_flag,
			(udma_speed_flag|1));
		outb(udma_speed_flag | 1, dmabase | 0x1f);
		printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN");
	}
#endif /* CONFIG_PDC202XX_BURST */

	ide_setup_dma(hwif, dmabase, 8);
}

static void __devinit 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: PCI config space interrupt "
					 "mirror fixed\n", name);
		}
	}
}

#define IDE_HFLAGS_PDC202XX \
	(IDE_HFLAG_ERROR_STOPS_FIFO | \
	 IDE_HFLAG_ABUSE_SET_DMA_MODE | \
	 IDE_HFLAG_OFF_BOARD)

#define DECLARE_PDC2026X_DEV(name_str, udma, extra_flags) \
	{ \
		.name		= name_str, \
		.init_chipset	= init_chipset_pdc202xx, \
		.init_hwif	= init_hwif_pdc202xx, \
		.init_dma	= init_dma_pdc202xx, \
		.extra		= 48, \
		.host_flags	= IDE_HFLAGS_PDC202XX | extra_flags, \
		.pio_mask	= ATA_PIO4, \
		.mwdma_mask	= ATA_MWDMA2, \
		.udma_mask	= udma, \
	}

static const struct ide_port_info pdc202xx_chipsets[] __devinitdata = {
	{	/* 0 */
		.name		= "PDC20246",
		.init_chipset	= init_chipset_pdc202xx,
		.init_hwif	= init_hwif_pdc202xx,
		.init_dma	= init_dma_pdc202xx,
		.extra		= 16,
		.host_flags	= IDE_HFLAGS_PDC202XX,
		.pio_mask	= ATA_PIO4,
		.mwdma_mask	= ATA_MWDMA2,
		.udma_mask	= ATA_UDMA2,
	},

	/* 1 */ DECLARE_PDC2026X_DEV("PDC20262", ATA_UDMA4, 0),
	/* 2 */ DECLARE_PDC2026X_DEV("PDC20263", ATA_UDMA4, 0),
	/* 3 */ DECLARE_PDC2026X_DEV("PDC20265", ATA_UDMA5, IDE_HFLAG_RQSIZE_256),
	/* 4 */ DECLARE_PDC2026X_DEV("PDC20267", ATA_UDMA5, IDE_HFLAG_RQSIZE_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 __devinit 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 < 3)
		pdc202ata4_fixup_irq(dev, d->name);

	if (idx == 3) {
		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 "ide: Skipping Promise PDC20265 "
				"attached to I2O RAID controller\n");
			return -ENODEV;
		}
	}

	return ide_setup_pci_device(dev, d);
}

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), 2 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 3 },
	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 4 },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);

static struct pci_driver driver = {
	.name		= "Promise_Old_IDE",
	.id_table	= pdc202xx_pci_tbl,
	.probe		= pdc202xx_init_one,
};

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

module_init(pdc202xx_ide_init);

MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
9adf768a	2	* linux/drivers/ide/pci/pdc202xx_old.c Version 0.52 Aug 27, 2007
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
fed21641	5	* Copyright (C) 2006-2007 MontaVista Software, Inc.
4fce3164	6	* Copyright (C) 2007 Bartlomiej Zolnierkiewicz
1da177e4 LT	7	*
	8	* Promise Ultra33 cards with BIOS v1.20 through 1.28 will need this
	9	* compiled into the kernel if you have more than one card installed.
	10	* Note that BIOS v1.29 is reported to fix the problem. Since this is
	11	* safe chipset tuning, including this support is harmless
	12	*
	13	* Promise Ultra66 cards with BIOS v1.11 this
	14	* compiled into the kernel if you have more than one card installed.
	15	*
	16	* Promise Ultra100 cards.
	17	*
	18	* The latest chipset code will support the following ::
	19	* Three Ultra33 controllers and 12 drives.
	20	* 8 are UDMA supported and 4 are limited to DMA mode 2 multi-word.
	21	* The 8/4 ratio is a BIOS code limit by promise.
	22	*
	23	* UNLESS you enable "CONFIG_PDC202XX_BURST"
	24	*
	25	*/
	26
	27	/*
	28	* Portions Copyright (C) 1999 Promise Technology, Inc.
	29	* Author: Frank Tiernan (frankt@promise.com)
	30	* Released under terms of General Public License
	31	*/
	32
1da177e4 LT	33	#include <linux/types.h>
	34	#include <linux/module.h>
	35	#include <linux/kernel.h>
	36	#include <linux/delay.h>
	37	#include <linux/timer.h>
	38	#include <linux/mm.h>
	39	#include <linux/ioport.h>
	40	#include <linux/blkdev.h>
	41	#include <linux/hdreg.h>
	42	#include <linux/interrupt.h>
	43	#include <linux/pci.h>
	44	#include <linux/init.h>
	45	#include <linux/ide.h>
	46
	47	#include <asm/io.h>
	48	#include <asm/irq.h>
	49
1da177e4 LT	50	#define PDC202XX_DEBUG_DRIVE_INFO 0
	51
	52	static const char *pdc_quirk_drives[] = {
	53	"QUANTUM FIREBALLlct08 08",
	54	"QUANTUM FIREBALLP KA6.4",
	55	"QUANTUM FIREBALLP KA9.1",
	56	"QUANTUM FIREBALLP LM20.4",
	57	"QUANTUM FIREBALLP KX13.6",
	58	"QUANTUM FIREBALLP KX20.5",
	59	"QUANTUM FIREBALLP KX27.3",
	60	"QUANTUM FIREBALLP LM20.5",
	61	NULL
	62	};
	63
4fce3164	64	static void pdc_old_disable_66MHz_clock(ide_hwif_t *);
1da177e4	65
88b2b32b	66	static void pdc202xx_set_mode(ide_drive_t *drive, const u8 speed)
1da177e4 LT	67	{
	68	ide_hwif_t *hwif = HWIF(drive);
	69	struct pci_dev *dev = hwif->pci_dev;
	70	u8 drive_pci = 0x60 + (drive->dn << 2);
1da177e4	71
4fce3164	72	u8 AP = 0, BP = 0, CP = 0;
1da177e4 LT	73	u8 TA = 0, TB = 0, TC = 0;
1da177e4 LT	74
4fce3164 BZ	75	#if PDC202XX_DEBUG_DRIVE_INFO
4fce3164 BZ	76	u32 drive_conf = 0;
1da177e4	77	pci_read_config_dword(dev, drive_pci, &drive_conf);
4fce3164	78	#endif
1da177e4	79
4fce3164 BZ	80	/*
	81	* TODO: do this once per channel
	82	*/
	83	if (dev->device != PCI_DEVICE_ID_PROMISE_20246)
	84	pdc_old_disable_66MHz_clock(hwif);
1da177e4	85
4fce3164 BZ	86	pci_read_config_byte(dev, drive_pci, &AP);
	87	pci_read_config_byte(dev, drive_pci + 1, &BP);
	88	pci_read_config_byte(dev, drive_pci + 2, &CP);
1da177e4 LT	89
1da177e4 LT	90	switch(speed) {
1da177e4 LT	91	case XFER_UDMA_5:
	92	case XFER_UDMA_4: TB = 0x20; TC = 0x01; break;
	93	case XFER_UDMA_2: TB = 0x20; TC = 0x01; break;
	94	case XFER_UDMA_3:
	95	case XFER_UDMA_1: TB = 0x40; TC = 0x02; break;
	96	case XFER_UDMA_0:
	97	case XFER_MW_DMA_2: TB = 0x60; TC = 0x03; break;
	98	case XFER_MW_DMA_1: TB = 0x60; TC = 0x04; break;
4fce3164	99	case XFER_MW_DMA_0: TB = 0xE0; TC = 0x0F; break;
1da177e4 LT	100	case XFER_PIO_4: TA = 0x01; TB = 0x04; break;
	101	case XFER_PIO_3: TA = 0x02; TB = 0x06; break;
	102	case XFER_PIO_2: TA = 0x03; TB = 0x08; break;
	103	case XFER_PIO_1: TA = 0x05; TB = 0x0C; break;
	104	case XFER_PIO_0:
	105	default: TA = 0x09; TB = 0x13; break;
	106	}
	107
	108	if (speed < XFER_SW_DMA_0) {
4fce3164 BZ	109	/*
	110	* preserve SYNC_INT / ERDDY_EN bits while clearing
	111	* Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
	112	*/
	113	AP &= ~0x3f;
	114	if (drive->id->capability & 4)
	115	AP \|= 0x20; /* set IORDY_EN bit */
	116	if (drive->media == ide_disk)
	117	AP \|= 0x10; /* set Prefetch_EN bit */
	118	/* clear PB[4:0] bits of register B */
	119	BP &= ~0x1f;
	120	pci_write_config_byte(dev, drive_pci, AP \| TA);
	121	pci_write_config_byte(dev, drive_pci + 1, BP \| TB);
1da177e4	122	} else {
4fce3164 BZ	123	/* clear MB[2:0] bits of register B */
	124	BP &= ~0xe0;
	125	/* clear MC[3:0] bits of register C */
	126	CP &= ~0x0f;
	127	pci_write_config_byte(dev, drive_pci + 1, BP \| TB);
	128	pci_write_config_byte(dev, drive_pci + 2, CP \| TC);
1da177e4 LT	129	}
	130
	131	#if PDC202XX_DEBUG_DRIVE_INFO
	132	printk(KERN_DEBUG "%s: %s drive%d 0x%08x ",
	133	drive->name, ide_xfer_verbose(speed),
	134	drive->dn, drive_conf);
4fce3164	135	pci_read_config_dword(dev, drive_pci, &drive_conf);
1da177e4	136	printk("0x%08x\n", drive_conf);
4fce3164	137	#endif
1da177e4 LT	138	}
1da177e4 LT	139
26bcb879	140	static void pdc202xx_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4	141	{
88b2b32b	142	pdc202xx_set_mode(drive, XFER_PIO_0 + pio);
1da177e4 LT	143	}
	144
	145	static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
	146	{
	147	u16 CIS = 0, mask = (hwif->channel) ? (1<<11) : (1<<10);
49521f97	148
1da177e4	149	pci_read_config_word(hwif->pci_dev, 0x50, &CIS);
49521f97 BZ	150
49521f97 BZ	151	return (CIS & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
1da177e4 LT	152	}
	153
	154	/*
	155	* Set the control register to use the 66MHz system
	156	* clock for UDMA 3/4/5 mode operation when necessary.
	157	*
4fce3164 BZ	158	* FIXME: this register is shared by both channels, some locking is needed
4fce3164 BZ	159	*
1da177e4 LT	160	* It may also be possible to leave the 66MHz clock on
	161	* and readjust the timing parameters.
	162	*/
	163	static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
	164	{
1c029fd6	165	unsigned long clock_reg = hwif->extra_base + 0x01;
0ecdca26	166	u8 clock = inb(clock_reg);
1da177e4	167
0ecdca26	168	outb(clock \| (hwif->channel ? 0x08 : 0x02), clock_reg);
1da177e4 LT	169	}
	170
	171	static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
	172	{
1c029fd6	173	unsigned long clock_reg = hwif->extra_base + 0x01;
0ecdca26	174	u8 clock = inb(clock_reg);
1da177e4	175
0ecdca26	176	outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
1da177e4 LT	177	}
1da177e4 LT	178
1da177e4 LT	179	static int pdc202xx_quirkproc (ide_drive_t *drive)
1da177e4 LT	180	{
d24ec426 SS	181	const char *list, model = drive->id->model;
	182
	183	for (list = pdc_quirk_drives; *list != NULL; list++)
	184	if (strstr(model, *list) != NULL)
	185	return 2;
	186	return 0;
1da177e4 LT	187	}
	188
	189	static void pdc202xx_old_ide_dma_start(ide_drive_t *drive)
	190	{
	191	if (drive->current_speed > XFER_UDMA_2)
	192	pdc_old_enable_66MHz_clock(drive->hwif);
f3d5b34c	193	if (drive->media != ide_disk \|\| drive->addressing == 1) {
1da177e4 LT	194	struct request *rq = HWGROUP(drive)->rq;
1da177e4 LT	195	ide_hwif_t *hwif = HWIF(drive);
1c029fd6	196	unsigned long high_16 = hwif->extra_base - 16;
1da177e4 LT	197	unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
1da177e4 LT	198	u32 word_count = 0;
0ecdca26	199	u8 clock = inb(high_16 + 0x11);
1da177e4	200
0ecdca26	201	outb(clock \| (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
1da177e4 LT	202	word_count = (rq->nr_sectors << 8);
	203	word_count = (rq_data_dir(rq) == READ) ?
	204	word_count \| 0x05000000 :
	205	word_count \| 0x06000000;
0ecdca26	206	outl(word_count, atapi_reg);
1da177e4 LT	207	}
	208	ide_dma_start(drive);
	209	}
	210
	211	static int pdc202xx_old_ide_dma_end(ide_drive_t *drive)
	212	{
f3d5b34c	213	if (drive->media != ide_disk \|\| drive->addressing == 1) {
1da177e4	214	ide_hwif_t *hwif = HWIF(drive);
1c029fd6	215	unsigned long high_16 = hwif->extra_base - 16;
1da177e4 LT	216	unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
	217	u8 clock = 0;
	218
0ecdca26 BZ	219	outl(0, atapi_reg); /* zero out extra */
	220	clock = inb(high_16 + 0x11);
	221	outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
1da177e4 LT	222	}
	223	if (drive->current_speed > XFER_UDMA_2)
	224	pdc_old_disable_66MHz_clock(drive->hwif);
	225	return __ide_dma_end(drive);
	226	}
	227
	228	static int pdc202xx_old_ide_dma_test_irq(ide_drive_t *drive)
	229	{
	230	ide_hwif_t *hwif = HWIF(drive);
1c029fd6	231	unsigned long high_16 = hwif->extra_base - 16;
0ecdca26 BZ	232	u8 dma_stat = inb(hwif->dma_status);
0ecdca26 BZ	233	u8 sc1d = inb(high_16 + 0x001d);
1da177e4 LT	234
	235	if (hwif->channel) {
	236	/* bit7: Error, bit6: Interrupting, bit5: FIFO Full, bit4: FIFO Empty */
	237	if ((sc1d & 0x50) == 0x50)
	238	goto somebody_else;
	239	else if ((sc1d & 0x40) == 0x40)
	240	return (dma_stat & 4) == 4;
	241	} else {
	242	/* bit3: Error, bit2: Interrupting, bit1: FIFO Full, bit0: FIFO Empty */
	243	if ((sc1d & 0x05) == 0x05)
	244	goto somebody_else;
	245	else if ((sc1d & 0x04) == 0x04)
	246	return (dma_stat & 4) == 4;
	247	}
	248	somebody_else:
	249	return (dma_stat & 4) == 4; /* return 1 if INTR asserted */
	250	}
	251
841d2a9b	252	static void pdc202xx_dma_lost_irq(ide_drive_t *drive)
1da177e4	253	{
841d2a9b SS	254	ide_hwif_t *hwif = HWIF(drive);
	255
	256	if (hwif->resetproc != NULL)
	257	hwif->resetproc(drive);
	258
	259	ide_dma_lost_irq(drive);
1da177e4 LT	260	}
1da177e4 LT	261
c283f5db	262	static void pdc202xx_dma_timeout(ide_drive_t *drive)
1da177e4	263	{
c283f5db SS	264	ide_hwif_t *hwif = HWIF(drive);
	265
	266	if (hwif->resetproc != NULL)
	267	hwif->resetproc(drive);
	268
	269	ide_dma_timeout(drive);
1da177e4 LT	270	}
	271
	272	static void pdc202xx_reset_host (ide_hwif_t *hwif)
	273	{
1c029fd6	274	unsigned long high_16 = hwif->extra_base - 16;
0ecdca26	275	u8 udma_speed_flag = inb(high_16 \| 0x001f);
1da177e4	276
0ecdca26	277	outb(udma_speed_flag \| 0x10, high_16 \| 0x001f);
1da177e4	278	mdelay(100);
0ecdca26	279	outb(udma_speed_flag & ~0x10, high_16 \| 0x001f);
1da177e4 LT	280	mdelay(2000); /* 2 seconds ?! */
	281
	282	printk(KERN_WARNING "PDC202XX: %s channel reset.\n",
	283	hwif->channel ? "Secondary" : "Primary");
	284	}
	285
	286	static void pdc202xx_reset (ide_drive_t *drive)
	287	{
	288	ide_hwif_t *hwif = HWIF(drive);
	289	ide_hwif_t *mate = hwif->mate;
26bcb879	290
1da177e4 LT	291	pdc202xx_reset_host(hwif);
1da177e4 LT	292	pdc202xx_reset_host(mate);
26bcb879 BZ	293
26bcb879 BZ	294	ide_set_max_pio(drive);
1da177e4 LT	295	}
1da177e4 LT	296
57e834e2 AC	297	static unsigned int __devinit init_chipset_pdc202xx(struct pci_dev *dev,
57e834e2 AC	298	const char *name)
1da177e4	299	{
1da177e4 LT	300	return dev->irq;
	301	}
	302
	303	static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
	304	{
26bcb879	305	hwif->set_pio_mode = &pdc202xx_set_pio_mode;
88b2b32b	306	hwif->set_dma_mode = &pdc202xx_set_mode;
26bcb879	307
1da177e4 LT	308	hwif->quirkproc = &pdc202xx_quirkproc;
1da177e4 LT	309
8b6ebe01	310	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246)
1da177e4	311	hwif->resetproc = &pdc202xx_reset;
1da177e4	312
e98d6e50 BZ	313	if (hwif->dma_base == 0)
	314	return;
	315
841d2a9b	316	hwif->dma_lost_irq = &pdc202xx_dma_lost_irq;
c283f5db	317	hwif->dma_timeout = &pdc202xx_dma_timeout;
1da177e4 LT	318
1da177e4 LT	319	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246) {
49521f97 BZ	320	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
	321	hwif->cbl = pdc202xx_old_cable_detect(hwif);
	322
1da177e4 LT	323	hwif->dma_start = &pdc202xx_old_ide_dma_start;
	324	hwif->ide_dma_end = &pdc202xx_old_ide_dma_end;
	325	}
	326	hwif->ide_dma_test_irq = &pdc202xx_old_ide_dma_test_irq;
1da177e4 LT	327	}
	328
	329	static void __devinit init_dma_pdc202xx(ide_hwif_t *hwif, unsigned long dmabase)
	330	{
	331	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;
	332
	333	if (hwif->channel) {
	334	ide_setup_dma(hwif, dmabase, 8);
	335	return;
	336	}
	337
0ecdca26 BZ	338	udma_speed_flag = inb(dmabase \| 0x1f);
	339	primary_mode = inb(dmabase \| 0x1a);
	340	secondary_mode = inb(dmabase \| 0x1b);
1da177e4 LT	341	printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
	342	"Primary %s Mode " \
	343	"Secondary %s Mode.\n", hwif->cds->name,
	344	(udma_speed_flag & 1) ? "EN" : "DIS",
	345	(primary_mode & 1) ? "MASTER" : "PCI",
	346	(secondary_mode & 1) ? "MASTER" : "PCI" );
	347
	348	#ifdef CONFIG_PDC202XX_BURST
	349	if (!(udma_speed_flag & 1)) {
	350	printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
	351	hwif->cds->name, udma_speed_flag,
	352	(udma_speed_flag\|1));
0ecdca26 BZ	353	outb(udma_speed_flag \| 1, dmabase \| 0x1f);
0ecdca26 BZ	354	printk("%sACTIVE\n", (inb(dmabase \| 0x1f) & 1) ? "" : "IN");
1da177e4 LT	355	}
1da177e4 LT	356	#endif /* CONFIG_PDC202XX_BURST */
1da177e4 LT	357
	358	ide_setup_dma(hwif, dmabase, 8);
	359	}
	360
97f84baa BZ	361	static void __devinit pdc202ata4_fixup_irq(struct pci_dev *dev,
97f84baa BZ	362	const char *name)
1da177e4 LT	363	{
	364	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
	365	u8 irq = 0, irq2 = 0;
	366	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
	367	/* 0xbc */
	368	pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)\|0x80, &irq2);
	369	if (irq != irq2) {
	370	pci_write_config_byte(dev,
	371	(PCI_INTERRUPT_LINE)\|0x80, irq); /* 0xbc */
97f84baa BZ	372	printk(KERN_INFO "%s: PCI config space interrupt "
97f84baa BZ	373	"mirror fixed\n", name);
1da177e4 LT	374	}
1da177e4 LT	375	}
1da177e4 LT	376	}
1da177e4 LT	377
4db90a14 BZ	378	#define IDE_HFLAGS_PDC202XX \
	379	(IDE_HFLAG_ERROR_STOPS_FIFO \| \
	380	IDE_HFLAG_ABUSE_SET_DMA_MODE \| \
	381	IDE_HFLAG_OFF_BOARD)
	382
272a3709	383	#define DECLARE_PDC2026X_DEV(name_str, udma, extra_flags) \
5ef8cb5d BZ	384	{ \
	385	.name = name_str, \
	386	.init_chipset = init_chipset_pdc202xx, \
	387	.init_hwif = init_hwif_pdc202xx, \
	388	.init_dma = init_dma_pdc202xx, \
	389	.extra = 48, \
4db90a14	390	.host_flags = IDE_HFLAGS_PDC202XX \| extra_flags, \
5ef8cb5d BZ	391	.pio_mask = ATA_PIO4, \
	392	.mwdma_mask = ATA_MWDMA2, \
	393	.udma_mask = udma, \
	394	}
	395
85620436	396	static const struct ide_port_info pdc202xx_chipsets[] __devinitdata = {
1da177e4 LT	397	{ /* 0 */
1da177e4 LT	398	.name = "PDC20246",
1da177e4 LT	399	.init_chipset = init_chipset_pdc202xx,
	400	.init_hwif = init_hwif_pdc202xx,
	401	.init_dma = init_dma_pdc202xx,
1da177e4	402	.extra = 16,
4db90a14	403	.host_flags = IDE_HFLAGS_PDC202XX,
4099d143	404	.pio_mask = ATA_PIO4,
5f8b6c34 BZ	405	.mwdma_mask = ATA_MWDMA2,
5f8b6c34 BZ	406	.udma_mask = ATA_UDMA2,
5ef8cb5d BZ	407	},
5ef8cb5d BZ	408
272a3709 BZ	409	/* 1 */ DECLARE_PDC2026X_DEV("PDC20262", ATA_UDMA4, 0),
	410	/* 2 */ DECLARE_PDC2026X_DEV("PDC20263", ATA_UDMA4, 0),
	411	/* 3 */ DECLARE_PDC2026X_DEV("PDC20265", ATA_UDMA5, IDE_HFLAG_RQSIZE_256),
	412	/* 4 */ DECLARE_PDC2026X_DEV("PDC20267", ATA_UDMA5, IDE_HFLAG_RQSIZE_256),
1da177e4 LT	413	};
	414
	415	/**
	416	* pdc202xx_init_one - called when a PDC202xx is found
	417	* @dev: the pdc202xx device
	418	* @id: the matching pci id
	419	*
	420	* Called when the PCI registration layer (or the IDE initialization)
	421	* finds a device matching our IDE device tables.
	422	*/
	423
	424	static int __devinit pdc202xx_init_one(struct pci_dev dev, const struct pci_device_id id)
	425	{
85620436	426	const struct ide_port_info *d;
97f84baa BZ	427	u8 idx = id->driver_data;
	428
	429	d = &pdc202xx_chipsets[idx];
	430
	431	if (idx < 3)
	432	pdc202ata4_fixup_irq(dev, d->name);
	433
	434	if (idx == 3) {
	435	struct pci_dev *bridge = dev->bus->self;
1da177e4	436
97f84baa BZ	437	if (bridge &&
	438	bridge->vendor == PCI_VENDOR_ID_INTEL &&
	439	(bridge->device == PCI_DEVICE_ID_INTEL_I960 \|\|
	440	bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
	441	printk(KERN_INFO "ide: Skipping Promise PDC20265 "
	442	"attached to I2O RAID controller\n");
	443	return -ENODEV;
	444	}
	445	}
	446
	447	return ide_setup_pci_device(dev, d);
1da177e4 LT	448	}
1da177e4 LT	449
9cbcc5e3 BZ	450	static const struct pci_device_id pdc202xx_pci_tbl[] = {
	451	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
	452	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
	453	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 2 },
	454	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 3 },
	455	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 4 },
1da177e4 LT	456	{ 0, },
	457	};
	458	MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);
	459
	460	static struct pci_driver driver = {
	461	.name = "Promise_Old_IDE",
	462	.id_table = pdc202xx_pci_tbl,
	463	.probe = pdc202xx_init_one,
	464	};
	465
82ab1eec	466	static int __init pdc202xx_ide_init(void)
1da177e4 LT	467	{
	468	return ide_pci_register_driver(&driver);
	469	}
	470
	471	module_init(pdc202xx_ide_init);
	472
	473	MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
	474	MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
	475	MODULE_LICENSE("GPL");