Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 864 insertions, 0 deletions

diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
new file mode 100644
index 0000000..e4be55e
--- /dev/null
+++ b/drivers/ata/pata_sis.c
@@ -0,0 +1,864 @@
+/*
+ *    pata_sis.c - SiS ATA driver
+ *
+ *	(C) 2005 Red Hat
+ *	(C) 2007 Bartlomiej Zolnierkiewicz
+ *
+ *    Based upon linux/drivers/ide/pci/sis5513.c
+ * Copyright (C) 1999-2000	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2002		Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer
+ * Copyright (C) 2003		Vojtech Pavlik <vojtech@suse.cz>
+ * SiS Taiwan		: for direct support and hardware.
+ * Daniela Engert	: for initial ATA100 advices and numerous others.
+ * John Fremlin, Manfred Spraul, Dave Morgan, Peter Kjellerstedt	:
+ *			  for checking code correctness, providing patches.
+ * Original tests and design on the SiS620 chipset.
+ * ATA100 tests and design on the SiS735 chipset.
+ * ATA16/33 support from specs
+ * ATA133 support for SiS961/962 by L.C. Chang <lcchang@sis.com.tw>
+ *
+ *
+ *	TODO
+ *	Check MWDMA on drives that don't support MWDMA speed pio cycles ?
+ *	More Testing
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/ata.h>
+#include "sis.h"
+
+#define DRV_NAME	"pata_sis"
+#define DRV_VERSION	"0.5.2"
+
+struct sis_chipset {
+	u16 device;				/* PCI host ID */
+	const struct ata_port_info *info;	/* Info block */
+	/* Probably add family, cable detect type etc here to clean
+	   up code later */
+};
+
+struct sis_laptop {
+	u16 device;
+	u16 subvendor;
+	u16 subdevice;
+};
+
+static const struct sis_laptop sis_laptop[] = {
+	/* devid, subvendor, subdev */
+	{ 0x5513, 0x1043, 0x1107 },	/* ASUS A6K */
+	{ 0x5513, 0x1734, 0x105F },	/* FSC Amilo A1630 */
+	{ 0x5513, 0x1071, 0x8640 },     /* EasyNote K5305 */
+	/* end marker */
+	{ 0, }
+};
+
+static int sis_short_ata40(struct pci_dev *dev)
+{
+	const struct sis_laptop *lap = &sis_laptop[0];
+
+	while (lap->device) {
+		if (lap->device == dev->device &&
+		    lap->subvendor == dev->subsystem_vendor &&
+		    lap->subdevice == dev->subsystem_device)
+			return 1;
+		lap++;
+	}
+
+	return 0;
+}
+
+/**
+ *	sis_old_port_base		-	return PCI configuration base for dev
+ *	@adev: device
+ *
+ *	Returns the base of the PCI configuration registers for this port
+ *	number.
+ */
+
+static int sis_old_port_base(struct ata_device *adev)
+{
+	return  0x40 + (4 * adev->link->ap->port_no) +  (2 * adev->devno);
+}
+
+/**
+ *	sis_133_cable_detect	-	check for 40/80 pin
+ *	@ap: Port
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Perform cable detection for the later UDMA133 capable
+ *	SiS chipset.
+ */
+
+static int sis_133_cable_detect(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u16 tmp;
+
+	/* The top bit of this register is the cable detect bit */
+	pci_read_config_word(pdev, 0x50 + 2 * ap->port_no, &tmp);
+	if ((tmp & 0x8000) && !sis_short_ata40(pdev))
+		return ATA_CBL_PATA40;
+	return ATA_CBL_PATA80;
+}
+
+/**
+ *	sis_66_cable_detect	-	check for 40/80 pin
+ *	@ap: Port
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Perform cable detection on the UDMA66, UDMA100 and early UDMA133
+ *	SiS IDE controllers.
+ */
+
+static int sis_66_cable_detect(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u8 tmp;
+
+	/* Older chips keep cable detect in bits 4/5 of reg 0x48 */
+	pci_read_config_byte(pdev, 0x48, &tmp);
+	tmp >>= ap->port_no;
+	if ((tmp & 0x10) && !sis_short_ata40(pdev))
+		return ATA_CBL_PATA40;
+	return ATA_CBL_PATA80;
+}
+
+
+/**
+ *	sis_pre_reset		-	probe begin
+ *	@link: ATA link
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Set up cable type and use generic probe init
+ */
+
+static int sis_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+	static const struct pci_bits sis_enable_bits[] = {
+		{ 0x4aU, 1U, 0x02UL, 0x02UL },	/* port 0 */
+		{ 0x4aU, 1U, 0x04UL, 0x04UL },	/* port 1 */
+	};
+
+	struct ata_port *ap = link->ap;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+	if (!pci_test_config_bits(pdev, &sis_enable_bits[ap->port_no]))
+		return -ENOENT;
+
+	/* Clear the FIFO settings. We can't enable the FIFO until
+	   we know we are poking at a disk */
+	pci_write_config_byte(pdev, 0x4B, 0);
+	return ata_sff_prereset(link, deadline);
+}
+
+
+/**
+ *	sis_set_fifo	-	Set RWP fifo bits for this device
+ *	@ap: Port
+ *	@adev: Device
+ *
+ *	SIS chipsets implement prefetch/postwrite bits for each device
+ *	on both channels. This functionality is not ATAPI compatible and
+ *	must be configured according to the class of device present
+ */
+
+static void sis_set_fifo(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u8 fifoctrl;
+	u8 mask = 0x11;
+
+	mask <<= (2 * ap->port_no);
+	mask <<= adev->devno;
+
+	/* This holds various bits including the FIFO control */
+	pci_read_config_byte(pdev, 0x4B, &fifoctrl);
+	fifoctrl &= ~mask;
+
+	/* Enable for ATA (disk) only */
+	if (adev->class == ATA_DEV_ATA)
+		fifoctrl |= mask;
+	pci_write_config_byte(pdev, 0x4B, fifoctrl);
+}
+
+/**
+ *	sis_old_set_piomode - Initialize host controller PATA PIO timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device we are configuring for.
+ *
+ *	Set PIO mode for device, in host controller PCI config space. This
+ *	function handles PIO set up for all chips that are pre ATA100 and
+ *	also early ATA100 devices.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_old_set_piomode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int port = sis_old_port_base(adev);
+	u8 t1, t2;
+	int speed = adev->pio_mode - XFER_PIO_0;
+
+	const u8 active[]   = { 0x00, 0x07, 0x04, 0x03, 0x01 };
+	const u8 recovery[] = { 0x00, 0x06, 0x04, 0x03, 0x03 };
+
+	sis_set_fifo(ap, adev);
+
+	pci_read_config_byte(pdev, port, &t1);
+	pci_read_config_byte(pdev, port + 1, &t2);
+
+	t1 &= ~0x0F;	/* Clear active/recovery timings */
+	t2 &= ~0x07;
+
+	t1 |= active[speed];
+	t2 |= recovery[speed];
+
+	pci_write_config_byte(pdev, port, t1);
+	pci_write_config_byte(pdev, port + 1, t2);
+}
+
+/**
+ *	sis_100_set_piomode - Initialize host controller PATA PIO timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device we are configuring for.
+ *
+ *	Set PIO mode for device, in host controller PCI config space. This
+ *	function handles PIO set up for ATA100 devices and early ATA133.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_100_set_piomode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int port = sis_old_port_base(adev);
+	int speed = adev->pio_mode - XFER_PIO_0;
+
+	const u8 actrec[] = { 0x00, 0x67, 0x44, 0x33, 0x31 };
+
+	sis_set_fifo(ap, adev);
+
+	pci_write_config_byte(pdev, port, actrec[speed]);
+}
+
+/**
+ *	sis_133_set_piomode - Initialize host controller PATA PIO timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device we are configuring for.
+ *
+ *	Set PIO mode for device, in host controller PCI config space. This
+ *	function handles PIO set up for the later ATA133 devices.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_133_set_piomode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int port = 0x40;
+	u32 t1;
+	u32 reg54;
+	int speed = adev->pio_mode - XFER_PIO_0;
+
+	const u32 timing133[] = {
+		0x28269000,	/* Recovery << 24 | Act << 16 | Ini << 12 */
+		0x0C266000,
+		0x04263000,
+		0x0C0A3000,
+		0x05093000
+	};
+	const u32 timing100[] = {
+		0x1E1C6000,	/* Recovery << 24 | Act << 16 | Ini << 12 */
+		0x091C4000,
+		0x031C2000,
+		0x09072000,
+		0x04062000
+	};
+
+	sis_set_fifo(ap, adev);
+
+	/* If bit 14 is set then the registers are mapped at 0x70 not 0x40 */
+	pci_read_config_dword(pdev, 0x54, &reg54);
+	if (reg54 & 0x40000000)
+		port = 0x70;
+	port += 8 * ap->port_no +  4 * adev->devno;
+
+	pci_read_config_dword(pdev, port, &t1);
+	t1 &= 0xC0C00FFF;	/* Mask out timing */
+
+	if (t1 & 0x08)		/* 100 or 133 ? */
+		t1 |= timing133[speed];
+	else
+		t1 |= timing100[speed];
+	pci_write_config_byte(pdev, port, t1);
+}
+
+/**
+ *	sis_old_set_dmamode - Initialize host controller PATA DMA timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device to program
+ *
+ *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
+ *	Handles pre UDMA and UDMA33 devices. Supports MWDMA as well unlike
+ *	the old ide/pci driver.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int speed = adev->dma_mode - XFER_MW_DMA_0;
+	int drive_pci = sis_old_port_base(adev);
+	u16 timing;
+
+	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
+	const u16 udma_bits[]  = { 0xE000, 0xC000, 0xA000 };
+
+	pci_read_config_word(pdev, drive_pci, &timing);
+
+	if (adev->dma_mode < XFER_UDMA_0) {
+		/* bits 3-0 hold recovery timing bits 8-10 active timing and
+		   the higher bits are dependant on the device */
+		timing &= ~0x870F;
+		timing |= mwdma_bits[speed];
+	} else {
+		/* Bit 15 is UDMA on/off, bit 13-14 are cycle time */
+		speed = adev->dma_mode - XFER_UDMA_0;
+		timing &= ~0x6000;
+		timing |= udma_bits[speed];
+	}
+	pci_write_config_word(pdev, drive_pci, timing);
+}
+
+/**
+ *	sis_66_set_dmamode - Initialize host controller PATA DMA timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device to program
+ *
+ *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
+ *	Handles UDMA66 and early UDMA100 devices. Supports MWDMA as well unlike
+ *	the old ide/pci driver.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_66_set_dmamode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int speed = adev->dma_mode - XFER_MW_DMA_0;
+	int drive_pci = sis_old_port_base(adev);
+	u16 timing;
+
+	/* MWDMA 0-2 and UDMA 0-5 */
+	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
+	const u16 udma_bits[]  = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000, 0x8000 };
+
+	pci_read_config_word(pdev, drive_pci, &timing);
+
+	if (adev->dma_mode < XFER_UDMA_0) {
+		/* bits 3-0 hold recovery timing bits 8-10 active timing and
+		   the higher bits are dependant on the device, bit 15 udma */
+		timing &= ~0x870F;
+		timing |= mwdma_bits[speed];
+	} else {
+		/* Bit 15 is UDMA on/off, bit 12-14 are cycle time */
+		speed = adev->dma_mode - XFER_UDMA_0;
+		timing &= ~0xF000;
+		timing |= udma_bits[speed];
+	}
+	pci_write_config_word(pdev, drive_pci, timing);
+}
+
+/**
+ *	sis_100_set_dmamode - Initialize host controller PATA DMA timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device to program
+ *
+ *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
+ *	Handles UDMA66 and early UDMA100 devices.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_100_set_dmamode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int speed = adev->dma_mode - XFER_MW_DMA_0;
+	int drive_pci = sis_old_port_base(adev);
+	u8 timing;
+
+	const u8 udma_bits[]  = { 0x8B, 0x87, 0x85, 0x83, 0x82, 0x81};
+
+	pci_read_config_byte(pdev, drive_pci + 1, &timing);
+
+	if (adev->dma_mode < XFER_UDMA_0) {
+		/* NOT SUPPORTED YET: NEED DATA SHEET. DITTO IN OLD DRIVER */
+	} else {
+		/* Bit 7 is UDMA on/off, bit 0-3 are cycle time */
+		speed = adev->dma_mode - XFER_UDMA_0;
+		timing &= ~0x8F;
+		timing |= udma_bits[speed];
+	}
+	pci_write_config_byte(pdev, drive_pci + 1, timing);
+}
+
+/**
+ *	sis_133_early_set_dmamode - Initialize host controller PATA DMA timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device to program
+ *
+ *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
+ *	Handles early SiS 961 bridges.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_133_early_set_dmamode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int speed = adev->dma_mode - XFER_MW_DMA_0;
+	int drive_pci = sis_old_port_base(adev);
+	u8 timing;
+	/* Low 4 bits are timing */
+	static const u8 udma_bits[]  = { 0x8F, 0x8A, 0x87, 0x85, 0x83, 0x82, 0x81};
+
+	pci_read_config_byte(pdev, drive_pci + 1, &timing);
+
+	if (adev->dma_mode < XFER_UDMA_0) {
+		/* NOT SUPPORTED YET: NEED DATA SHEET. DITTO IN OLD DRIVER */
+	} else {
+		/* Bit 7 is UDMA on/off, bit 0-3 are cycle time */
+		speed = adev->dma_mode - XFER_UDMA_0;
+		timing &= ~0x8F;
+		timing |= udma_bits[speed];
+	}
+	pci_write_config_byte(pdev, drive_pci + 1, timing);
+}
+
+/**
+ *	sis_133_set_dmamode - Initialize host controller PATA DMA timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device to program
+ *
+ *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void sis_133_set_dmamode (struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	int speed = adev->dma_mode - XFER_MW_DMA_0;
+	int port = 0x40;
+	u32 t1;
+	u32 reg54;
+
+	/* bits 4- cycle time 8 - cvs time */
+	static const u32 timing_u100[] = { 0x6B0, 0x470, 0x350, 0x140, 0x120, 0x110, 0x000 };
+	static const u32 timing_u133[] = { 0x9F0, 0x6A0, 0x470, 0x250, 0x230, 0x220, 0x210 };
+
+	/* If bit 14 is set then the registers are mapped at 0x70 not 0x40 */
+	pci_read_config_dword(pdev, 0x54, &reg54);
+	if (reg54 & 0x40000000)
+		port = 0x70;
+	port += (8 * ap->port_no) +  (4 * adev->devno);
+
+	pci_read_config_dword(pdev, port, &t1);
+
+	if (adev->dma_mode < XFER_UDMA_0) {
+		t1 &= ~0x00000004;
+		/* FIXME: need data sheet to add MWDMA here. Also lacking on
+		   ide/pci driver */
+	} else {
+		speed = adev->dma_mode - XFER_UDMA_0;
+		/* if & 8 no UDMA133 - need info for ... */
+		t1 &= ~0x00000FF0;
+		t1 |= 0x00000004;
+		if (t1 & 0x08)
+			t1 |= timing_u133[speed];
+		else
+			t1 |= timing_u100[speed];
+	}
+	pci_write_config_dword(pdev, port, t1);
+}
+
+static struct scsi_host_template sis_sht = {
+	ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations sis_133_for_sata_ops = {
+	.inherits		= &ata_bmdma_port_ops,
+	.set_piomode		= sis_133_set_piomode,
+	.set_dmamode		= sis_133_set_dmamode,
+	.cable_detect		= sis_133_cable_detect,
+};
+
+static struct ata_port_operations sis_base_ops = {
+	.inherits		= &ata_bmdma_port_ops,
+	.prereset		= sis_pre_reset,
+};
+
+static struct ata_port_operations sis_133_ops = {
+	.inherits		= &sis_base_ops,
+	.set_piomode		= sis_133_set_piomode,
+	.set_dmamode		= sis_133_set_dmamode,
+	.cable_detect		= sis_133_cable_detect,
+};
+
+static struct ata_port_operations sis_133_early_ops = {
+	.inherits		= &sis_base_ops,
+	.set_piomode		= sis_100_set_piomode,
+	.set_dmamode		= sis_133_early_set_dmamode,
+	.cable_detect		= sis_66_cable_detect,
+};
+
+static struct ata_port_operations sis_100_ops = {
+	.inherits		= &sis_base_ops,
+	.set_piomode		= sis_100_set_piomode,
+	.set_dmamode		= sis_100_set_dmamode,
+	.cable_detect		= sis_66_cable_detect,
+};
+
+static struct ata_port_operations sis_66_ops = {
+	.inherits		= &sis_base_ops,
+	.set_piomode		= sis_old_set_piomode,
+	.set_dmamode		= sis_66_set_dmamode,
+	.cable_detect		= sis_66_cable_detect,
+};
+
+static struct ata_port_operations sis_old_ops = {
+	.inherits		= &sis_base_ops,
+	.set_piomode		= sis_old_set_piomode,
+	.set_dmamode		= sis_old_set_dmamode,
+	.cable_detect		= ata_cable_40wire,
+};
+
+static const struct ata_port_info sis_info = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.mwdma_mask	= 0x07,
+	.udma_mask	= 0,
+	.port_ops	= &sis_old_ops,
+};
+static const struct ata_port_info sis_info33 = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.mwdma_mask	= 0x07,
+	.udma_mask	= ATA_UDMA2,	/* UDMA 33 */
+	.port_ops	= &sis_old_ops,
+};
+static const struct ata_port_info sis_info66 = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.udma_mask	= ATA_UDMA4,	/* UDMA 66 */
+	.port_ops	= &sis_66_ops,
+};
+static const struct ata_port_info sis_info100 = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.udma_mask	= ATA_UDMA5,
+	.port_ops	= &sis_100_ops,
+};
+static const struct ata_port_info sis_info100_early = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.udma_mask	= ATA_UDMA5,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.port_ops	= &sis_66_ops,
+};
+static const struct ata_port_info sis_info133 = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &sis_133_ops,
+};
+const struct ata_port_info sis_info133_for_sata = {
+	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &sis_133_for_sata_ops,
+};
+static const struct ata_port_info sis_info133_early = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.pio_mask	= 0x1f,	/* pio0-4 */
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &sis_133_early_ops,
+};
+
+/* Privately shared with the SiS180 SATA driver, not for use elsewhere */
+EXPORT_SYMBOL_GPL(sis_info133_for_sata);
+
+static void sis_fixup(struct pci_dev *pdev, struct sis_chipset *sis)
+{
+	u16 regw;
+	u8 reg;
+
+	if (sis->info == &sis_info133) {
+		pci_read_config_word(pdev, 0x50, &regw);
+		if (regw & 0x08)
+			pci_write_config_word(pdev, 0x50, regw & ~0x08);
+		pci_read_config_word(pdev, 0x52, &regw);
+		if (regw & 0x08)
+			pci_write_config_word(pdev, 0x52, regw & ~0x08);
+		return;
+	}
+
+	if (sis->info == &sis_info133_early || sis->info == &sis_info100) {
+		/* Fix up latency */
+		pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);
+		/* Set compatibility bit */
+		pci_read_config_byte(pdev, 0x49, &reg);
+		if (!(reg & 0x01))
+			pci_write_config_byte(pdev, 0x49, reg | 0x01);
+		return;
+	}
+
+	if (sis->info == &sis_info66 || sis->info == &sis_info100_early) {
+		/* Fix up latency */
+		pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);
+		/* Set compatibility bit */
+		pci_read_config_byte(pdev, 0x52, &reg);
+		if (!(reg & 0x04))
+			pci_write_config_byte(pdev, 0x52, reg | 0x04);
+		return;
+	}
+
+	if (sis->info == &sis_info33) {
+		pci_read_config_byte(pdev, PCI_CLASS_PROG, &reg);
+		if (( reg & 0x0F ) != 0x00)
+			pci_write_config_byte(pdev, PCI_CLASS_PROG, reg & 0xF0);
+		/* Fall through to ATA16 fixup below */
+	}
+
+	if (sis->info == &sis_info || sis->info == &sis_info33) {
+		/* force per drive recovery and active timings
+		   needed on ATA_33 and below chips */
+		pci_read_config_byte(pdev, 0x52, &reg);
+		if (!(reg & 0x08))
+			pci_write_config_byte(pdev, 0x52, reg|0x08);
+		return;
+	}
+
+	BUG();
+}
+
+/**
+ *	sis_init_one - Register SiS ATA PCI device with kernel services
+ *	@pdev: PCI device to register
+ *	@ent: Entry in sis_pci_tbl matching with @pdev
+ *
+ *	Called from kernel PCI layer.  We probe for combined mode (sigh),
+ *	and then hand over control to libata, for it to do the rest.
+ *
+ *	LOCKING:
+ *	Inherited from PCI layer (may sleep).
+ *
+ *	RETURNS:
+ *	Zero on success, or -ERRNO value.
+ */
+
+static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	static int printed_version;
+	const struct ata_port_info *ppi[] = { NULL, NULL };
+	struct pci_dev *host = NULL;
+	struct sis_chipset *chipset = NULL;
+	struct sis_chipset *sets;
+	int rc;
+
+	static struct sis_chipset sis_chipsets[] = {
+
+		{ 0x0968, &sis_info133 },
+		{ 0x0966, &sis_info133 },
+		{ 0x0965, &sis_info133 },
+		{ 0x0745, &sis_info100 },
+		{ 0x0735, &sis_info100 },
+		{ 0x0733, &sis_info100 },
+		{ 0x0635, &sis_info100 },
+		{ 0x0633, &sis_info100 },
+
+		{ 0x0730, &sis_info100_early },	/* 100 with ATA 66 layout */
+		{ 0x0550, &sis_info100_early },	/* 100 with ATA 66 layout */
+
+		{ 0x0640, &sis_info66 },
+		{ 0x0630, &sis_info66 },
+		{ 0x0620, &sis_info66 },
+		{ 0x0540, &sis_info66 },
+		{ 0x0530, &sis_info66 },
+
+		{ 0x5600, &sis_info33 },
+		{ 0x5598, &sis_info33 },
+		{ 0x5597, &sis_info33 },
+		{ 0x5591, &sis_info33 },
+		{ 0x5582, &sis_info33 },
+		{ 0x5581, &sis_info33 },
+
+		{ 0x5596, &sis_info },
+		{ 0x5571, &sis_info },
+		{ 0x5517, &sis_info },
+		{ 0x5511, &sis_info },
+
+		{0}
+	};
+	static struct sis_chipset sis133_early = {
+		0x0, &sis_info133_early
+	};
+	static struct sis_chipset sis133 = {
+		0x0, &sis_info133
+	};
+	static struct sis_chipset sis100_early = {
+		0x0, &sis_info100_early
+	};
+	static struct sis_chipset sis100 = {
+		0x0, &sis_info100
+	};
+
+	if (!printed_version++)
+		dev_printk(KERN_DEBUG, &pdev->dev,
+			   "version " DRV_VERSION "\n");
+
+	rc = pcim_enable_device(pdev);
+	if (rc)
+		return rc;
+
+	/* We have to find the bridge first */
+	for (sets = &sis_chipsets[0]; sets->device; sets++) {
+		host = pci_get_device(PCI_VENDOR_ID_SI, sets->device, NULL);
+		if (host != NULL) {
+			chipset = sets;			/* Match found */
+			if (sets->device == 0x630) {	/* SIS630 */
+				if (host->revision >= 0x30)	/* 630 ET */
+					chipset = &sis100_early;
+			}
+			break;
+		}
+	}
+
+	/* Look for concealed bridges */
+	if (chipset == NULL) {
+		/* Second check */
+		u32 idemisc;
+		u16 trueid;
+
+		/* Disable ID masking and register remapping then
+		   see what the real ID is */
+
+		pci_read_config_dword(pdev, 0x54, &idemisc);
+		pci_write_config_dword(pdev, 0x54, idemisc & 0x7fffffff);
+		pci_read_config_word(pdev, PCI_DEVICE_ID, &trueid);
+		pci_write_config_dword(pdev, 0x54, idemisc);
+
+		switch(trueid) {
+		case 0x5518:	/* SIS 962/963 */
+			chipset = &sis133;
+			if ((idemisc & 0x40000000) == 0) {
+				pci_write_config_dword(pdev, 0x54, idemisc | 0x40000000);
+				printk(KERN_INFO "SIS5513: Switching to 5513 register mapping\n");
+			}
+			break;
+		case 0x0180:	/* SIS 965/965L */
+			chipset =  &sis133;
+			break;
+		case 0x1180:	/* SIS 966/966L */
+			chipset =  &sis133;
+			break;
+		}
+	}
+
+	/* Further check */
+	if (chipset == NULL) {
+		struct pci_dev *lpc_bridge;
+		u16 trueid;
+		u8 prefctl;
+		u8 idecfg;
+
+		/* Try the second unmasking technique */
+		pci_read_config_byte(pdev, 0x4a, &idecfg);
+		pci_write_config_byte(pdev, 0x4a, idecfg | 0x10);
+		pci_read_config_word(pdev, PCI_DEVICE_ID, &trueid);
+		pci_write_config_byte(pdev, 0x4a, idecfg);
+
+		switch(trueid) {
+		case 0x5517:
+			lpc_bridge = pci_get_slot(pdev->bus, 0x10); /* Bus 0 Dev 2 Fn 0 */
+			if (lpc_bridge == NULL)
+				break;
+			pci_read_config_byte(pdev, 0x49, &prefctl);
+			pci_dev_put(lpc_bridge);
+
+			if (lpc_bridge->revision == 0x10 && (prefctl & 0x80)) {
+				chipset = &sis133_early;
+				break;
+			}
+			chipset = &sis100;
+			break;
+		}
+	}
+	pci_dev_put(host);
+
+	/* No chipset info, no support */
+	if (chipset == NULL)
+		return -ENODEV;
+
+	ppi[0] = chipset->info;
+
+	sis_fixup(pdev, chipset);
+
+	return ata_pci_sff_init_one(pdev, ppi, &sis_sht, chipset);
+}
+
+static const struct pci_device_id sis_pci_tbl[] = {
+	{ PCI_VDEVICE(SI, 0x5513), },	/* SiS 5513 */
+	{ PCI_VDEVICE(SI, 0x5518), },	/* SiS 5518 */
+	{ PCI_VDEVICE(SI, 0x1180), },	/* SiS 1180 */
+
+	{ }
+};
+
+static struct pci_driver sis_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= sis_pci_tbl,
+	.probe			= sis_init_one,
+	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM
+	.suspend		= ata_pci_device_suspend,
+	.resume			= ata_pci_device_resume,
+#endif
+};
+
+static int __init sis_init(void)
+{
+	return pci_register_driver(&sis_pci_driver);
+}
+
+static void __exit sis_exit(void)
+{
+	pci_unregister_driver(&sis_pci_driver);
+}
+
+module_init(sis_init);
+module_exit(sis_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("SCSI low-level driver for SiS ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+