Move libata to drivers/ata.

1 files changed, 595 insertions, 0 deletions

diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
new file mode 100644
index 000000000000..be46df75ab5a
--- /dev/null
+++ b/drivers/ata/sata_nv.c
@@ -0,0 +1,595 @@
+/*
+ *  sata_nv.c - NVIDIA nForce SATA
+ *
+ *  Copyright 2004 NVIDIA Corp.  All rights reserved.
+ *  Copyright 2004 Andrew Chew
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *  libata documentation is available via 'make {ps|pdf}docs',
+ *  as Documentation/DocBook/libata.*
+ *
+ *  No hardware documentation available outside of NVIDIA.
+ *  This driver programs the NVIDIA SATA controller in a similar
+ *  fashion as with other PCI IDE BMDMA controllers, with a few
+ *  NV-specific details such as register offsets, SATA phy location,
+ *  hotplug info, etc.
+ *
+ */
+
+#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/interrupt.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME			"sata_nv"
+#define DRV_VERSION			"2.0"
+
+enum {
+	NV_PORTS			= 2,
+	NV_PIO_MASK			= 0x1f,
+	NV_MWDMA_MASK			= 0x07,
+	NV_UDMA_MASK			= 0x7f,
+	NV_PORT0_SCR_REG_OFFSET		= 0x00,
+	NV_PORT1_SCR_REG_OFFSET		= 0x40,
+
+	/* INT_STATUS/ENABLE */
+	NV_INT_STATUS			= 0x10,
+	NV_INT_ENABLE			= 0x11,
+	NV_INT_STATUS_CK804		= 0x440,
+	NV_INT_ENABLE_CK804		= 0x441,
+
+	/* INT_STATUS/ENABLE bits */
+	NV_INT_DEV			= 0x01,
+	NV_INT_PM			= 0x02,
+	NV_INT_ADDED			= 0x04,
+	NV_INT_REMOVED			= 0x08,
+
+	NV_INT_PORT_SHIFT		= 4,	/* each port occupies 4 bits */
+
+	NV_INT_ALL			= 0x0f,
+	NV_INT_MASK			= NV_INT_DEV |
+					  NV_INT_ADDED | NV_INT_REMOVED,
+
+	/* INT_CONFIG */
+	NV_INT_CONFIG			= 0x12,
+	NV_INT_CONFIG_METHD		= 0x01, // 0 = INT, 1 = SMI
+
+	// For PCI config register 20
+	NV_MCP_SATA_CFG_20		= 0x50,
+	NV_MCP_SATA_CFG_20_SATA_SPACE_EN = 0x04,
+};
+
+static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
+static void nv_ck804_host_stop(struct ata_host_set *host_set);
+static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance,
+					struct pt_regs *regs);
+static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance,
+				    struct pt_regs *regs);
+static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance,
+				      struct pt_regs *regs);
+static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg);
+static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+
+static void nv_nf2_freeze(struct ata_port *ap);
+static void nv_nf2_thaw(struct ata_port *ap);
+static void nv_ck804_freeze(struct ata_port *ap);
+static void nv_ck804_thaw(struct ata_port *ap);
+static void nv_error_handler(struct ata_port *ap);
+
+enum nv_host_type
+{
+	GENERIC,
+	NFORCE2,
+	NFORCE3 = NFORCE2,	/* NF2 == NF3 as far as sata_nv is concerned */
+	CK804
+};
+
+static const struct pci_device_id nv_pci_tbl[] = {
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, NFORCE2 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, NFORCE3 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, NFORCE3 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, CK804 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, CK804 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, CK804 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, CK804 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, 0x045c, PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, 0x045d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, 0x045e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, 0x045f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
+		PCI_ANY_ID, PCI_ANY_ID,
+		PCI_CLASS_STORAGE_IDE<<8, 0xffff00, GENERIC },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
+		PCI_ANY_ID, PCI_ANY_ID,
+		PCI_CLASS_STORAGE_RAID<<8, 0xffff00, GENERIC },
+	{ 0, } /* terminate list */
+};
+
+static struct pci_driver nv_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= nv_pci_tbl,
+	.probe			= nv_init_one,
+	.remove			= ata_pci_remove_one,
+};
+
+static struct scsi_host_template nv_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	.bios_param		= ata_std_bios_param,
+};
+
+static const struct ata_port_operations nv_generic_ops = {
+	.port_disable		= ata_port_disable,
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.exec_command		= ata_exec_command,
+	.check_status		= ata_check_status,
+	.dev_select		= ata_std_dev_select,
+	.bmdma_setup		= ata_bmdma_setup,
+	.bmdma_start		= ata_bmdma_start,
+	.bmdma_stop		= ata_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= nv_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+	.data_xfer		= ata_pio_data_xfer,
+	.irq_handler		= nv_generic_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.scr_read		= nv_scr_read,
+	.scr_write		= nv_scr_write,
+	.port_start		= ata_port_start,
+	.port_stop		= ata_port_stop,
+	.host_stop		= ata_pci_host_stop,
+};
+
+static const struct ata_port_operations nv_nf2_ops = {
+	.port_disable		= ata_port_disable,
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.exec_command		= ata_exec_command,
+	.check_status		= ata_check_status,
+	.dev_select		= ata_std_dev_select,
+	.bmdma_setup		= ata_bmdma_setup,
+	.bmdma_start		= ata_bmdma_start,
+	.bmdma_stop		= ata_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.freeze			= nv_nf2_freeze,
+	.thaw			= nv_nf2_thaw,
+	.error_handler		= nv_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+	.data_xfer		= ata_pio_data_xfer,
+	.irq_handler		= nv_nf2_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.scr_read		= nv_scr_read,
+	.scr_write		= nv_scr_write,
+	.port_start		= ata_port_start,
+	.port_stop		= ata_port_stop,
+	.host_stop		= ata_pci_host_stop,
+};
+
+static const struct ata_port_operations nv_ck804_ops = {
+	.port_disable		= ata_port_disable,
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.exec_command		= ata_exec_command,
+	.check_status		= ata_check_status,
+	.dev_select		= ata_std_dev_select,
+	.bmdma_setup		= ata_bmdma_setup,
+	.bmdma_start		= ata_bmdma_start,
+	.bmdma_stop		= ata_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.freeze			= nv_ck804_freeze,
+	.thaw			= nv_ck804_thaw,
+	.error_handler		= nv_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+	.data_xfer		= ata_pio_data_xfer,
+	.irq_handler		= nv_ck804_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.scr_read		= nv_scr_read,
+	.scr_write		= nv_scr_write,
+	.port_start		= ata_port_start,
+	.port_stop		= ata_port_stop,
+	.host_stop		= nv_ck804_host_stop,
+};
+
+static struct ata_port_info nv_port_info[] = {
+	/* generic */
+	{
+		.sht		= &nv_sht,
+		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+		.pio_mask	= NV_PIO_MASK,
+		.mwdma_mask	= NV_MWDMA_MASK,
+		.udma_mask	= NV_UDMA_MASK,
+		.port_ops	= &nv_generic_ops,
+	},
+	/* nforce2/3 */
+	{
+		.sht		= &nv_sht,
+		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+		.pio_mask	= NV_PIO_MASK,
+		.mwdma_mask	= NV_MWDMA_MASK,
+		.udma_mask	= NV_UDMA_MASK,
+		.port_ops	= &nv_nf2_ops,
+	},
+	/* ck804 */
+	{
+		.sht		= &nv_sht,
+		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+		.pio_mask	= NV_PIO_MASK,
+		.mwdma_mask	= NV_MWDMA_MASK,
+		.udma_mask	= NV_UDMA_MASK,
+		.port_ops	= &nv_ck804_ops,
+	},
+};
+
+MODULE_AUTHOR("NVIDIA");
+MODULE_DESCRIPTION("low-level driver for NVIDIA nForce SATA controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, nv_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance,
+					struct pt_regs *regs)
+{
+	struct ata_host_set *host_set = dev_instance;
+	unsigned int i;
+	unsigned int handled = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host_set->lock, flags);
+
+	for (i = 0; i < host_set->n_ports; i++) {
+		struct ata_port *ap;
+
+		ap = host_set->ports[i];
+		if (ap &&
+		    !(ap->flags & ATA_FLAG_DISABLED)) {
+			struct ata_queued_cmd *qc;
+
+			qc = ata_qc_from_tag(ap, ap->active_tag);
+			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
+				handled += ata_host_intr(ap, qc);
+			else
+				// No request pending?  Clear interrupt status
+				// anyway, in case there's one pending.
+				ap->ops->check_status(ap);
+		}
+
+	}
+
+	spin_unlock_irqrestore(&host_set->lock, flags);
+
+	return IRQ_RETVAL(handled);
+}
+
+static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
+{
+	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
+	int handled;
+
+	/* freeze if hotplugged */
+	if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) {
+		ata_port_freeze(ap);
+		return 1;
+	}
+
+	/* bail out if not our interrupt */
+	if (!(irq_stat & NV_INT_DEV))
+		return 0;
+
+	/* DEV interrupt w/ no active qc? */
+	if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
+		ata_check_status(ap);
+		return 1;
+	}
+
+	/* handle interrupt */
+	handled = ata_host_intr(ap, qc);
+	if (unlikely(!handled)) {
+		/* spurious, clear it */
+		ata_check_status(ap);
+	}
+
+	return 1;
+}
+
+static irqreturn_t nv_do_interrupt(struct ata_host_set *host_set, u8 irq_stat)
+{
+	int i, handled = 0;
+
+	for (i = 0; i < host_set->n_ports; i++) {
+		struct ata_port *ap = host_set->ports[i];
+
+		if (ap && !(ap->flags & ATA_FLAG_DISABLED))
+			handled += nv_host_intr(ap, irq_stat);
+
+		irq_stat >>= NV_INT_PORT_SHIFT;
+	}
+
+	return IRQ_RETVAL(handled);
+}
+
+static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance,
+				    struct pt_regs *regs)
+{
+	struct ata_host_set *host_set = dev_instance;
+	u8 irq_stat;
+	irqreturn_t ret;
+
+	spin_lock(&host_set->lock);
+	irq_stat = inb(host_set->ports[0]->ioaddr.scr_addr + NV_INT_STATUS);
+	ret = nv_do_interrupt(host_set, irq_stat);
+	spin_unlock(&host_set->lock);
+
+	return ret;
+}
+
+static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance,
+				      struct pt_regs *regs)
+{
+	struct ata_host_set *host_set = dev_instance;
+	u8 irq_stat;
+	irqreturn_t ret;
+
+	spin_lock(&host_set->lock);
+	irq_stat = readb(host_set->mmio_base + NV_INT_STATUS_CK804);
+	ret = nv_do_interrupt(host_set, irq_stat);
+	spin_unlock(&host_set->lock);
+
+	return ret;
+}
+
+static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg)
+{
+	if (sc_reg > SCR_CONTROL)
+		return 0xffffffffU;
+
+	return ioread32((void __iomem *)ap->ioaddr.scr_addr + (sc_reg * 4));
+}
+
+static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+{
+	if (sc_reg > SCR_CONTROL)
+		return;
+
+	iowrite32(val, (void __iomem *)ap->ioaddr.scr_addr + (sc_reg * 4));
+}
+
+static void nv_nf2_freeze(struct ata_port *ap)
+{
+	unsigned long scr_addr = ap->host_set->ports[0]->ioaddr.scr_addr;
+	int shift = ap->port_no * NV_INT_PORT_SHIFT;
+	u8 mask;
+
+	mask = inb(scr_addr + NV_INT_ENABLE);
+	mask &= ~(NV_INT_ALL << shift);
+	outb(mask, scr_addr + NV_INT_ENABLE);
+}
+
+static void nv_nf2_thaw(struct ata_port *ap)
+{
+	unsigned long scr_addr = ap->host_set->ports[0]->ioaddr.scr_addr;
+	int shift = ap->port_no * NV_INT_PORT_SHIFT;
+	u8 mask;
+
+	outb(NV_INT_ALL << shift, scr_addr + NV_INT_STATUS);
+
+	mask = inb(scr_addr + NV_INT_ENABLE);
+	mask |= (NV_INT_MASK << shift);
+	outb(mask, scr_addr + NV_INT_ENABLE);
+}
+
+static void nv_ck804_freeze(struct ata_port *ap)
+{
+	void __iomem *mmio_base = ap->host_set->mmio_base;
+	int shift = ap->port_no * NV_INT_PORT_SHIFT;
+	u8 mask;
+
+	mask = readb(mmio_base + NV_INT_ENABLE_CK804);
+	mask &= ~(NV_INT_ALL << shift);
+	writeb(mask, mmio_base + NV_INT_ENABLE_CK804);
+}
+
+static void nv_ck804_thaw(struct ata_port *ap)
+{
+	void __iomem *mmio_base = ap->host_set->mmio_base;
+	int shift = ap->port_no * NV_INT_PORT_SHIFT;
+	u8 mask;
+
+	writeb(NV_INT_ALL << shift, mmio_base + NV_INT_STATUS_CK804);
+
+	mask = readb(mmio_base + NV_INT_ENABLE_CK804);
+	mask |= (NV_INT_MASK << shift);
+	writeb(mask, mmio_base + NV_INT_ENABLE_CK804);
+}
+
+static int nv_hardreset(struct ata_port *ap, unsigned int *class)
+{
+	unsigned int dummy;
+
+	/* SATA hardreset fails to retrieve proper device signature on
+	 * some controllers.  Don't classify on hardreset.  For more
+	 * info, see http://bugme.osdl.org/show_bug.cgi?id=3352
+	 */
+	return sata_std_hardreset(ap, &dummy);
+}
+
+static void nv_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset,
+			   nv_hardreset, ata_std_postreset);
+}
+
+static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	static int printed_version = 0;
+	struct ata_port_info *ppi;
+	struct ata_probe_ent *probe_ent;
+	int pci_dev_busy = 0;
+	int rc;
+	u32 bar;
+	unsigned long base;
+
+        // Make sure this is a SATA controller by counting the number of bars
+        // (NVIDIA SATA controllers will always have six bars).  Otherwise,
+        // it's an IDE controller and we ignore it.
+	for (bar=0; bar<6; bar++)
+		if (pci_resource_start(pdev, bar) == 0)
+			return -ENODEV;
+
+	if (!printed_version++)
+		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
+
+	rc = pci_enable_device(pdev);
+	if (rc)
+		goto err_out;
+
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc) {
+		pci_dev_busy = 1;
+		goto err_out_disable;
+	}
+
+	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+
+	rc = -ENOMEM;
+
+	ppi = &nv_port_info[ent->driver_data];
+	probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
+	if (!probe_ent)
+		goto err_out_regions;
+
+	probe_ent->mmio_base = pci_iomap(pdev, 5, 0);
+	if (!probe_ent->mmio_base) {
+		rc = -EIO;
+		goto err_out_free_ent;
+	}
+
+	base = (unsigned long)probe_ent->mmio_base;
+
+	probe_ent->port[0].scr_addr = base + NV_PORT0_SCR_REG_OFFSET;
+	probe_ent->port[1].scr_addr = base + NV_PORT1_SCR_REG_OFFSET;
+
+	/* enable SATA space for CK804 */
+	if (ent->driver_data == CK804) {
+		u8 regval;
+
+		pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, &regval);
+		regval |= NV_MCP_SATA_CFG_20_SATA_SPACE_EN;
+		pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval);
+	}
+
+	pci_set_master(pdev);
+
+	rc = ata_device_add(probe_ent);
+	if (rc != NV_PORTS)
+		goto err_out_iounmap;
+
+	kfree(probe_ent);
+
+	return 0;
+
+err_out_iounmap:
+	pci_iounmap(pdev, probe_ent->mmio_base);
+err_out_free_ent:
+	kfree(probe_ent);
+err_out_regions:
+	pci_release_regions(pdev);
+err_out_disable:
+	if (!pci_dev_busy)
+		pci_disable_device(pdev);
+err_out:
+	return rc;
+}
+
+static void nv_ck804_host_stop(struct ata_host_set *host_set)
+{
+	struct pci_dev *pdev = to_pci_dev(host_set->dev);
+	u8 regval;
+
+	/* disable SATA space for CK804 */
+	pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, &regval);
+	regval &= ~NV_MCP_SATA_CFG_20_SATA_SPACE_EN;
+	pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval);
+
+	ata_pci_host_stop(host_set);
+}
+
+static int __init nv_init(void)
+{
+	return pci_register_driver(&nv_pci_driver);
+}
+
+static void __exit nv_exit(void)
+{
+	pci_unregister_driver(&nv_pci_driver);
+}
+
+module_init(nv_init);
+module_exit(nv_exit);