Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 708 insertions, 0 deletions

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
new file mode 100644
index 000000000..34f00f389
--- /dev/null
+++ b/drivers/ata/pata_via.c
@@ -0,0 +1,708 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * pata_via.c 	- VIA PATA for new ATA layer
+ *			  (C) 2005-2006 Red Hat Inc
+ *
+ *  Documentation
+ *	Most chipset documentation available under NDA only
+ *
+ *  VIA version guide
+ *	VIA VT82C561	-	early design, uses ata_generic currently
+ *	VIA VT82C576	-	MWDMA, 33Mhz
+ *	VIA VT82C586	-	MWDMA, 33Mhz
+ *	VIA VT82C586a	-	Added UDMA to 33Mhz
+ *	VIA VT82C586b	-	UDMA33
+ *	VIA VT82C596a	-	Nonfunctional UDMA66
+ *	VIA VT82C596b	-	Working UDMA66
+ *	VIA VT82C686	-	Nonfunctional UDMA66
+ *	VIA VT82C686a	-	Working UDMA66
+ *	VIA VT82C686b	-	Updated to UDMA100
+ *	VIA VT8231	-	UDMA100
+ *	VIA VT8233	-	UDMA100
+ *	VIA VT8233a	-	UDMA133
+ *	VIA VT8233c	-	UDMA100
+ *	VIA VT8235	-	UDMA133
+ *	VIA VT8237	-	UDMA133
+ *	VIA VT8237A	-	UDMA133
+ *	VIA VT8237S	-	UDMA133
+ *	VIA VT8251	-	UDMA133
+ *
+ *	Most registers remain compatible across chips. Others start reserved
+ *	and acquire sensible semantics if set to 1 (eg cable detect). A few
+ *	exceptions exist, notably around the FIFO settings.
+ *
+ *	One additional quirk of the VIA design is that like ALi they use few
+ *	PCI IDs for a lot of chips.
+ *
+ *	Based heavily on:
+ *
+ * Version 3.38
+ *
+ * VIA IDE driver for Linux. Supported southbridges:
+ *
+ *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
+ *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
+ *   vt8235, vt8237
+ *
+ * Copyright (c) 2000-2002 Vojtech Pavlik
+ *
+ * Based on the work of:
+ *	Michel Aubry
+ *	Jeff Garzik
+ *	Andre Hedrick
+
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/gfp.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/dmi.h>
+
+#define DRV_NAME "pata_via"
+#define DRV_VERSION "0.3.4"
+
+enum {
+	VIA_BAD_PREQ	= 0x01, /* Crashes if PREQ# till DDACK# set */
+	VIA_BAD_CLK66	= 0x02, /* 66 MHz clock doesn't work correctly */
+	VIA_SET_FIFO	= 0x04, /* Needs to have FIFO split set */
+	VIA_NO_UNMASK	= 0x08, /* Doesn't work with IRQ unmasking on */
+	VIA_BAD_ID	= 0x10, /* Has wrong vendor ID (0x1107) */
+	VIA_BAD_AST	= 0x20, /* Don't touch Address Setup Timing */
+	VIA_NO_ENABLES	= 0x40, /* Has no enablebits */
+	VIA_SATA_PATA	= 0x80, /* SATA/PATA combined configuration */
+};
+
+enum {
+	VIA_IDFLAG_SINGLE = (1 << 0), /* single channel controller) */
+};
+
+/*
+ * VIA SouthBridge chips.
+ */
+
+static const struct via_isa_bridge {
+	const char *name;
+	u16 id;
+	u8 rev_min;
+	u8 rev_max;
+	u8 udma_mask;
+	u8 flags;
+} via_isa_bridges[] = {
+	{ "vx855",	PCI_DEVICE_ID_VIA_VX855,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
+	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
+	{ "vt8261",	PCI_DEVICE_ID_VIA_8261,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
+	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES },
+	{ "vt6415",	PCI_DEVICE_ID_VIA_6415,     0x00, 0xff, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES },
+	{ "vt8237a",	PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
+	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
+	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
+	{ "vt82c686b",	PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
+	{ "vt82c686a",	PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
+	{ "vt82c686",	PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
+	{ "vt82c596b",	PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
+	{ "vt82c596a",	PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
+	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
+	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
+	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
+	{ "vt82c586a",	PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
+	{ "vt82c586",	PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
+	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
+	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
+	{ "vtxxxx",	PCI_DEVICE_ID_VIA_ANON,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ NULL }
+};
+
+static const struct dmi_system_id no_atapi_dma_dmi_table[] = {
+	{
+		.ident = "AVERATEC 3200",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AVERATEC"),
+			DMI_MATCH(DMI_BOARD_NAME, "3200"),
+		},
+	},
+	{ }
+};
+
+struct via_port {
+	u8 cached_device;
+};
+
+/*
+ *	Cable special cases
+ */
+
+static const struct dmi_system_id cable_dmi_table[] = {
+	{
+		.ident = "Acer Ferrari 3400",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
+			DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
+		},
+	},
+	{ }
+};
+
+static int via_cable_override(struct pci_dev *pdev)
+{
+	/* Systems by DMI */
+	if (dmi_check_system(cable_dmi_table))
+		return 1;
+	/* Arima W730-K8/Targa Visionary 811/... */
+	if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)
+		return 1;
+	return 0;
+}
+
+
+/**
+ *	via_cable_detect	-	cable detection
+ *	@ap: ATA port
+ *
+ *	Perform cable detection. Actually for the VIA case the BIOS
+ *	already did this for us. We read the values provided by the
+ *	BIOS. If you are using an 8235 in a non-PC configuration you
+ *	may need to update this code.
+ *
+ *	Hotplug also impacts on this.
+ */
+
+static int via_cable_detect(struct ata_port *ap) {
+	const struct via_isa_bridge *config = ap->host->private_data;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 ata66;
+
+	if (via_cable_override(pdev))
+		return ATA_CBL_PATA40_SHORT;
+
+	if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0)
+		return ATA_CBL_SATA;
+
+	/* Early chips are 40 wire */
+	if (config->udma_mask < ATA_UDMA4)
+		return ATA_CBL_PATA40;
+	/* UDMA 66 chips have only drive side logic */
+	else if (config->udma_mask < ATA_UDMA5)
+		return ATA_CBL_PATA_UNK;
+	/* UDMA 100 or later */
+	pci_read_config_dword(pdev, 0x50, &ata66);
+	/* Check both the drive cable reporting bits, we might not have
+	   two drives */
+	if (ata66 & (0x10100000 >> (16 * ap->port_no)))
+		return ATA_CBL_PATA80;
+	/* Check with ACPI so we can spot BIOS reported SATA bridges */
+	if (ata_acpi_init_gtm(ap) &&
+	    ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap)))
+		return ATA_CBL_PATA80;
+	return ATA_CBL_PATA40;
+}
+
+static int via_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+	struct ata_port *ap = link->ap;
+	const struct via_isa_bridge *config = ap->host->private_data;
+
+	if (!(config->flags & VIA_NO_ENABLES)) {
+		static const struct pci_bits via_enable_bits[] = {
+			{ 0x40, 1, 0x02, 0x02 },
+			{ 0x40, 1, 0x01, 0x01 }
+		};
+		struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+		if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))
+			return -ENOENT;
+	}
+
+	return ata_sff_prereset(link, deadline);
+}
+
+
+/**
+ *	via_do_set_mode	-	set transfer mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *	@mode: ATA mode being programmed
+ *	@set_ast: Set to program address setup
+ *	@udma_type: UDMA mode/format of registers
+ *
+ *	Program the VIA registers for DMA and PIO modes. Uses the ata timing
+ *	support in order to compute modes.
+ *
+ *	FIXME: Hotplug will require we serialize multiple mode changes
+ *	on the two channels.
+ */
+
+static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev,
+			    int mode, int set_ast, int udma_type)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct ata_device *peer = ata_dev_pair(adev);
+	struct ata_timing t, p;
+	const int via_clock = 33333;	/* Bus clock in kHz */
+	const int T = 1000000000 / via_clock;
+	int UT = T;
+	int ut;
+	int offset = 3 - (2*ap->port_no) - adev->devno;
+
+	switch (udma_type) {
+	case ATA_UDMA4:
+		UT = T / 2; break;
+	case ATA_UDMA5:
+		UT = T / 3; break;
+	case ATA_UDMA6:
+		UT = T / 4; break;
+	}
+
+	/* Calculate the timing values we require */
+	ata_timing_compute(adev, mode, &t, T, UT);
+
+	/* We share 8bit timing so we must merge the constraints */
+	if (peer) {
+		if (peer->pio_mode) {
+			ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
+			ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
+		}
+	}
+
+	/* Address setup is programmable but breaks on UDMA133 setups */
+	if (set_ast) {
+		u8 setup;	/* 2 bits per drive */
+		int shift = 2 * offset;
+
+		pci_read_config_byte(pdev, 0x4C, &setup);
+		setup &= ~(3 << shift);
+		setup |= (clamp_val(t.setup, 1, 4) - 1) << shift;
+		pci_write_config_byte(pdev, 0x4C, setup);
+	}
+
+	/* Load the PIO mode bits */
+	pci_write_config_byte(pdev, 0x4F - ap->port_no,
+		((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1));
+	pci_write_config_byte(pdev, 0x48 + offset,
+		((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1));
+
+	/* Load the UDMA bits according to type */
+	switch (udma_type) {
+	case ATA_UDMA2:
+	default:
+		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03;
+		break;
+	case ATA_UDMA4:
+		ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f;
+		break;
+	case ATA_UDMA5:
+		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
+		break;
+	case ATA_UDMA6:
+		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
+		break;
+	}
+
+	/* Set UDMA unless device is not UDMA capable */
+	if (udma_type) {
+		u8 udma_etc;
+
+		pci_read_config_byte(pdev, 0x50 + offset, &udma_etc);
+
+		/* clear transfer mode bit */
+		udma_etc &= ~0x20;
+
+		if (t.udma) {
+			/* preserve 80-wire cable detection bit */
+			udma_etc &= 0x10;
+			udma_etc |= ut;
+		}
+
+		pci_write_config_byte(pdev, 0x50 + offset, udma_etc);
+	}
+}
+
+static void via_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	const struct via_isa_bridge *config = ap->host->private_data;
+	int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
+
+	via_do_set_mode(ap, adev, adev->pio_mode, set_ast, config->udma_mask);
+}
+
+static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	const struct via_isa_bridge *config = ap->host->private_data;
+	int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
+
+	via_do_set_mode(ap, adev, adev->dma_mode, set_ast, config->udma_mask);
+}
+
+/**
+ *	via_mode_filter		-	filter buggy device/mode pairs
+ *	@dev: ATA device
+ *	@mask: Mode bitmask
+ *
+ *	We need to apply some minimal filtering for old controllers and at least
+ *	one breed of Transcend SSD. Return the updated mask.
+ */
+
+static unsigned int via_mode_filter(struct ata_device *dev, unsigned int mask)
+{
+	struct ata_host *host = dev->link->ap->host;
+	const struct via_isa_bridge *config = host->private_data;
+	unsigned char model_num[ATA_ID_PROD_LEN + 1];
+
+	if (config->id == PCI_DEVICE_ID_VIA_82C586_0) {
+		ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
+		if (strcmp(model_num, "TS64GSSD25-M") == 0) {
+			ata_dev_warn(dev,
+	"disabling UDMA mode due to reported lockups with this device\n");
+			mask &= ~ ATA_MASK_UDMA;
+		}
+	}
+
+	if (dev->class == ATA_DEV_ATAPI &&
+	    dmi_check_system(no_atapi_dma_dmi_table)) {
+		ata_dev_warn(dev, "controller locks up on ATAPI DMA, forcing PIO\n");
+		mask &= ATA_MASK_PIO;
+	}
+
+	return mask;
+}
+
+/**
+ *	via_tf_load - send taskfile registers to host controller
+ *	@ap: Port to which output is sent
+ *	@tf: ATA taskfile register set
+ *
+ *	Outputs ATA taskfile to standard ATA host controller.
+ *
+ *	Note: This is to fix the internal bug of via chipsets, which
+ *	will reset the device register after changing the IEN bit on
+ *	ctl register
+ */
+static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+	struct ata_ioports *ioaddr = &ap->ioaddr;
+	struct via_port *vp = ap->private_data;
+	unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
+	int newctl = 0;
+
+	if (tf->ctl != ap->last_ctl) {
+		iowrite8(tf->ctl, ioaddr->ctl_addr);
+		ap->last_ctl = tf->ctl;
+		ata_wait_idle(ap);
+		newctl = 1;
+	}
+
+	if (tf->flags & ATA_TFLAG_DEVICE) {
+		iowrite8(tf->device, ioaddr->device_addr);
+		vp->cached_device = tf->device;
+	} else if (newctl)
+		iowrite8(vp->cached_device, ioaddr->device_addr);
+
+	if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
+		WARN_ON_ONCE(!ioaddr->ctl_addr);
+		iowrite8(tf->hob_feature, ioaddr->feature_addr);
+		iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
+		iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
+		iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
+		iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
+	}
+
+	if (is_addr) {
+		iowrite8(tf->feature, ioaddr->feature_addr);
+		iowrite8(tf->nsect, ioaddr->nsect_addr);
+		iowrite8(tf->lbal, ioaddr->lbal_addr);
+		iowrite8(tf->lbam, ioaddr->lbam_addr);
+		iowrite8(tf->lbah, ioaddr->lbah_addr);
+	}
+
+	ata_wait_idle(ap);
+}
+
+static int via_port_start(struct ata_port *ap)
+{
+	struct via_port *vp;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+	int ret = ata_bmdma_port_start(ap);
+	if (ret < 0)
+		return ret;
+
+	vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL);
+	if (vp == NULL)
+		return -ENOMEM;
+	ap->private_data = vp;
+	return 0;
+}
+
+static struct scsi_host_template via_sht = {
+	ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations via_port_ops = {
+	.inherits	= &ata_bmdma_port_ops,
+	.cable_detect	= via_cable_detect,
+	.set_piomode	= via_set_piomode,
+	.set_dmamode	= via_set_dmamode,
+	.prereset	= via_pre_reset,
+	.sff_tf_load	= via_tf_load,
+	.port_start	= via_port_start,
+	.mode_filter	= via_mode_filter,
+};
+
+static struct ata_port_operations via_port_ops_noirq = {
+	.inherits	= &via_port_ops,
+	.sff_data_xfer	= ata_sff_data_xfer32,
+};
+
+/**
+ *	via_config_fifo		-	set up the FIFO
+ *	@pdev: PCI device
+ *	@flags: configuration flags
+ *
+ *	Set the FIFO properties for this device if necessary. Used both on
+ *	set up and on and the resume path
+ */
+
+static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
+{
+	u8 enable;
+
+	/* 0x40 low bits indicate enabled channels */
+	pci_read_config_byte(pdev, 0x40 , &enable);
+	enable &= 3;
+
+	if (flags & VIA_SET_FIFO) {
+		static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20};
+		u8 fifo;
+
+		pci_read_config_byte(pdev, 0x43, &fifo);
+
+		/* Clear PREQ# until DDACK# for errata */
+		if (flags & VIA_BAD_PREQ)
+			fifo &= 0x7F;
+		else
+			fifo &= 0x9f;
+		/* Turn on FIFO for enabled channels */
+		fifo |= fifo_setting[enable];
+		pci_write_config_byte(pdev, 0x43, fifo);
+	}
+}
+
+static void via_fixup(struct pci_dev *pdev, const struct via_isa_bridge *config)
+{
+	u32 timing;
+
+	/* Initialise the FIFO for the enabled channels. */
+	via_config_fifo(pdev, config->flags);
+
+	if (config->udma_mask == ATA_UDMA4) {
+		/* The 66 MHz devices require we enable the clock */
+		pci_read_config_dword(pdev, 0x50, &timing);
+		timing |= 0x80008;
+		pci_write_config_dword(pdev, 0x50, timing);
+	}
+	if (config->flags & VIA_BAD_CLK66) {
+		/* Disable the 66MHz clock on problem devices */
+		pci_read_config_dword(pdev, 0x50, &timing);
+		timing &= ~0x80008;
+		pci_write_config_dword(pdev, 0x50, timing);
+	}
+}
+
+/**
+ *	via_init_one		-	discovery callback
+ *	@pdev: PCI device
+ *	@id: PCI table info
+ *
+ *	A VIA IDE interface has been discovered. Figure out what revision
+ *	and perform configuration work before handing it to the ATA layer
+ */
+
+static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	/* Early VIA without UDMA support */
+	static const struct ata_port_info via_mwdma_info = {
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.port_ops = &via_port_ops
+	};
+	/* Ditto with IRQ masking required */
+	static const struct ata_port_info via_mwdma_info_borked = {
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.port_ops = &via_port_ops_noirq,
+	};
+	/* VIA UDMA 33 devices (and borked 66) */
+	static const struct ata_port_info via_udma33_info = {
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.udma_mask = ATA_UDMA2,
+		.port_ops = &via_port_ops
+	};
+	/* VIA UDMA 66 devices */
+	static const struct ata_port_info via_udma66_info = {
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.udma_mask = ATA_UDMA4,
+		.port_ops = &via_port_ops
+	};
+	/* VIA UDMA 100 devices */
+	static const struct ata_port_info via_udma100_info = {
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.udma_mask = ATA_UDMA5,
+		.port_ops = &via_port_ops
+	};
+	/* UDMA133 with bad AST (All current 133) */
+	static const struct ata_port_info via_udma133_info = {
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = ATA_PIO4,
+		.mwdma_mask = ATA_MWDMA2,
+		.udma_mask = ATA_UDMA6,	/* FIXME: should check north bridge */
+		.port_ops = &via_port_ops
+	};
+	const struct ata_port_info *ppi[] = { NULL, NULL };
+	struct pci_dev *isa;
+	const struct via_isa_bridge *config;
+	u8 enable;
+	unsigned long flags = id->driver_data;
+	int rc;
+
+	ata_print_version_once(&pdev->dev, DRV_VERSION);
+
+	rc = pcim_enable_device(pdev);
+	if (rc)
+		return rc;
+
+	if (flags & VIA_IDFLAG_SINGLE)
+		ppi[1] = &ata_dummy_port_info;
+
+	/* To find out how the IDE will behave and what features we
+	   actually have to look at the bridge not the IDE controller */
+	for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON;
+	     config++)
+		if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
+			!!(config->flags & VIA_BAD_ID),
+			config->id, NULL))) {
+			u8 rev = isa->revision;
+			pci_dev_put(isa);
+
+			if ((id->device == 0x0415 || id->device == 0x3164) &&
+			    (config->id != id->device))
+				continue;
+
+			if (rev >= config->rev_min && rev <= config->rev_max)
+				break;
+		}
+
+	if (!(config->flags & VIA_NO_ENABLES)) {
+		/* 0x40 low bits indicate enabled channels */
+		pci_read_config_byte(pdev, 0x40 , &enable);
+		enable &= 3;
+		if (enable == 0)
+			return -ENODEV;
+	}
+
+	/* Clock set up */
+	switch (config->udma_mask) {
+	case 0x00:
+		if (config->flags & VIA_NO_UNMASK)
+			ppi[0] = &via_mwdma_info_borked;
+		else
+			ppi[0] = &via_mwdma_info;
+		break;
+	case ATA_UDMA2:
+		ppi[0] = &via_udma33_info;
+		break;
+	case ATA_UDMA4:
+		ppi[0] = &via_udma66_info;
+		break;
+	case ATA_UDMA5:
+		ppi[0] = &via_udma100_info;
+		break;
+	case ATA_UDMA6:
+		ppi[0] = &via_udma133_info;
+		break;
+	default:
+		WARN_ON(1);
+		return -ENODEV;
+ 	}
+
+	via_fixup(pdev, config);
+
+	/* We have established the device type, now fire it up */
+	return ata_pci_bmdma_init_one(pdev, ppi, &via_sht, (void *)config, 0);
+}
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ *	via_reinit_one		-	reinit after resume
+ *	@pdev: PCI device
+ *
+ *	Called when the VIA PATA device is resumed. We must then
+ *	reconfigure the fifo and other setup we may have altered. In
+ *	addition the kernel needs to have the resume methods on PCI
+ *	quirk supported.
+ */
+
+static int via_reinit_one(struct pci_dev *pdev)
+{
+	struct ata_host *host = pci_get_drvdata(pdev);
+	int rc;
+
+	rc = ata_pci_device_do_resume(pdev);
+	if (rc)
+		return rc;
+
+	via_fixup(pdev, host->private_data);
+
+	ata_host_resume(host);
+	return 0;
+}
+#endif
+
+static const struct pci_device_id via[] = {
+	{ PCI_VDEVICE(VIA, 0x0415), },
+	{ PCI_VDEVICE(VIA, 0x0571), },
+	{ PCI_VDEVICE(VIA, 0x0581), },
+	{ PCI_VDEVICE(VIA, 0x1571), },
+	{ PCI_VDEVICE(VIA, 0x3164), },
+	{ PCI_VDEVICE(VIA, 0x5324), },
+	{ PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE },
+	{ PCI_VDEVICE(VIA, 0x9001), VIA_IDFLAG_SINGLE },
+
+	{ },
+};
+
+static struct pci_driver via_pci_driver = {
+	.name 		= DRV_NAME,
+	.id_table	= via,
+	.probe 		= via_init_one,
+	.remove		= ata_pci_remove_one,
+#ifdef CONFIG_PM_SLEEP
+	.suspend	= ata_pci_device_suspend,
+	.resume		= via_reinit_one,
+#endif
+};
+
+module_pci_driver(via_pci_driver);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for VIA PATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, via);
+MODULE_VERSION(DRV_VERSION);