diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 1a081c3..3a4f445 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -151,24 +151,23 @@
 
 
 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance);
 static void pdc_eng_timeout(struct ata_port *ap);
 static void pdc_20621_phy_reset (struct ata_port *ap);
 static int pdc_port_start(struct ata_port *ap);
 static void pdc20621_qc_prep(struct ata_queued_cmd *qc);
 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
-static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe);
-static int pdc20621_detect_dimm(struct ata_probe_ent *pe);
-static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe,
+static unsigned int pdc20621_dimm_init(struct ata_host *host);
+static int pdc20621_detect_dimm(struct ata_host *host);
+static unsigned int pdc20621_i2c_read(struct ata_host *host,
 				      u32 device, u32 subaddr, u32 *pdata);
-static int pdc20621_prog_dimm0(struct ata_probe_ent *pe);
-static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe);
+static int pdc20621_prog_dimm0(struct ata_host *host);
+static unsigned int pdc20621_prog_dimm_global(struct ata_host *host);
 #ifdef ATA_VERBOSE_DEBUG
-static void pdc20621_get_from_dimm(struct ata_probe_ent *pe,
+static void pdc20621_get_from_dimm(struct ata_host *host,
 				   void *psource, u32 offset, u32 size);
 #endif
-static void pdc20621_put_to_dimm(struct ata_probe_ent *pe,
+static void pdc20621_put_to_dimm(struct ata_host *host,
 				 void *psource, u32 offset, u32 size);
 static void pdc20621_irq_clear(struct ata_port *ap);
 static unsigned int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc);
@@ -204,7 +203,6 @@
 	.qc_issue		= pdc20621_qc_issue_prot,
 	.data_xfer		= ata_data_xfer,
 	.eng_timeout		= pdc_eng_timeout,
-	.irq_handler		= pdc20621_interrupt,
 	.irq_clear		= pdc20621_irq_clear,
 	.irq_on			= ata_irq_on,
 	.irq_ack		= ata_irq_ack,
@@ -214,7 +212,6 @@
 static const struct ata_port_info pdc_port_info[] = {
 	/* board_20621 */
 	{
-		.sht		= &pdc_sata_sht,
 		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_SRST | ATA_FLAG_MMIO |
 				  ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING,
@@ -882,15 +879,15 @@
 
 
 #ifdef ATA_VERBOSE_DEBUG
-static void pdc20621_get_from_dimm(struct ata_probe_ent *pe, void *psource,
+static void pdc20621_get_from_dimm(struct ata_host *host, void *psource,
 				   u32 offset, u32 size)
 {
 	u32 window_size;
 	u16 idx;
 	u8 page_mask;
 	long dist;
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
-	void __iomem *dimm_mmio = pe->iomap[PDC_DIMM_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
+	void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR];
 
 	/* hard-code chip #0 */
 	mmio += PDC_CHIP0_OFS;
@@ -937,15 +934,15 @@
 #endif
 
 
-static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource,
+static void pdc20621_put_to_dimm(struct ata_host *host, void *psource,
 				 u32 offset, u32 size)
 {
 	u32 window_size;
 	u16 idx;
 	u8 page_mask;
 	long dist;
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
-	void __iomem *dimm_mmio = pe->iomap[PDC_DIMM_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
+	void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR];
 
 	/* hard-code chip #0 */
 	mmio += PDC_CHIP0_OFS;
@@ -987,10 +984,10 @@
 }
 
 
-static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe, u32 device,
+static unsigned int pdc20621_i2c_read(struct ata_host *host, u32 device,
 				      u32 subaddr, u32 *pdata)
 {
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 	u32 i2creg  = 0;
 	u32 status;
 	u32 count =0;
@@ -1023,17 +1020,17 @@
 }
 
 
-static int pdc20621_detect_dimm(struct ata_probe_ent *pe)
+static int pdc20621_detect_dimm(struct ata_host *host)
 {
 	u32 data=0 ;
-  	if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
+	if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
 			     PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
    		if (data == 100)
 			return 100;
   	} else
 		return 0;
 
-   	if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
+	if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
 		if(data <= 0x75)
 			return 133;
    	} else
@@ -1043,13 +1040,13 @@
 }
 
 
-static int pdc20621_prog_dimm0(struct ata_probe_ent *pe)
+static int pdc20621_prog_dimm0(struct ata_host *host)
 {
 	u32 spd0[50];
 	u32 data = 0;
    	int size, i;
    	u8 bdimmsize;
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 	static const struct {
 		unsigned int reg;
 		unsigned int ofs;
@@ -1072,7 +1069,7 @@
 	mmio += PDC_CHIP0_OFS;
 
 	for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
-		pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
+		pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
 				  pdc_i2c_read_data[i].reg,
 				  &spd0[pdc_i2c_read_data[i].ofs]);
 
@@ -1108,11 +1105,11 @@
 }
 
 
-static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe)
+static unsigned int pdc20621_prog_dimm_global(struct ata_host *host)
 {
 	u32 data, spd0;
 	int error, i;
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 
 	/* hard-code chip #0 */
    	mmio += PDC_CHIP0_OFS;
@@ -1129,7 +1126,7 @@
 	readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
 
 	/* Turn on for ECC */
-	pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
+	pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
 			  PDC_DIMM_SPD_TYPE, &spd0);
 	if (spd0 == 0x02) {
 		data |= (0x01 << 16);
@@ -1156,7 +1153,7 @@
 }
 
 
-static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe)
+static unsigned int pdc20621_dimm_init(struct ata_host *host)
 {
 	int speed, size, length;
 	u32 addr,spd0,pci_status;
@@ -1166,7 +1163,7 @@
 	u32 ticks=0;
 	u32 clock=0;
 	u32 fparam=0;
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 
 	/* hard-code chip #0 */
    	mmio += PDC_CHIP0_OFS;
@@ -1225,18 +1222,18 @@
 	   Read SPD of DIMM by I2C interface,
 	   and program the DIMM Module Controller.
 	*/
- 	if (!(speed = pdc20621_detect_dimm(pe))) {
+	if (!(speed = pdc20621_detect_dimm(host))) {
 		printk(KERN_ERR "Detect Local DIMM Fail\n");
 		return 1;	/* DIMM error */
    	}
    	VPRINTK("Local DIMM Speed = %d\n", speed);
 
    	/* Programming DIMM0 Module Control Register (index_CID0:80h) */
-   	size = pdc20621_prog_dimm0(pe);
+	size = pdc20621_prog_dimm0(host);
    	VPRINTK("Local DIMM Size = %dMB\n",size);
 
    	/* Programming DIMM Module Global Control Register (index_CID0:88h) */
-   	if (pdc20621_prog_dimm_global(pe)) {
+	if (pdc20621_prog_dimm_global(host)) {
 		printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
 		return 1;
    	}
@@ -1249,20 +1246,20 @@
   				'9','8','0','3','1','6','1','2',0,0};
 		u8 test_parttern2[40] = {0};
 
-		pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x10040, 40);
-		pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x40, 40);
+		pdc20621_put_to_dimm(host, (void *) test_parttern2, 0x10040, 40);
+		pdc20621_put_to_dimm(host, (void *) test_parttern2, 0x40, 40);
 
-		pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x10040, 40);
-		pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
+		pdc20621_put_to_dimm(host, (void *) test_parttern1, 0x10040, 40);
+		pdc20621_get_from_dimm(host, (void *) test_parttern2, 0x40, 40);
 		printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
 		       test_parttern2[1], &(test_parttern2[2]));
-		pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x10040,
+		pdc20621_get_from_dimm(host, (void *) test_parttern2, 0x10040,
 				       40);
 		printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
 		       test_parttern2[1], &(test_parttern2[2]));
 
-		pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x40, 40);
-		pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
+		pdc20621_put_to_dimm(host, (void *) test_parttern1, 0x40, 40);
+		pdc20621_get_from_dimm(host, (void *) test_parttern2, 0x40, 40);
 		printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
 		       test_parttern2[1], &(test_parttern2[2]));
 	}
@@ -1270,14 +1267,14 @@
 
 	/* ECC initiliazation. */
 
-	pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
+	pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
 			  PDC_DIMM_SPD_TYPE, &spd0);
 	if (spd0 == 0x02) {
 		VPRINTK("Start ECC initialization\n");
 		addr = 0;
 		length = size * 1024 * 1024;
 		while (addr < length) {
-			pdc20621_put_to_dimm(pe, (void *) &tmp, addr,
+			pdc20621_put_to_dimm(host, (void *) &tmp, addr,
 					     sizeof(u32));
 			addr += sizeof(u32);
 		}
@@ -1287,10 +1284,10 @@
 }
 
 
-static void pdc_20621_init(struct ata_probe_ent *pe)
+static void pdc_20621_init(struct ata_host *host)
 {
 	u32 tmp;
-	void __iomem *mmio = pe->iomap[PDC_MMIO_BAR];
+	void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
 
 	/* hard-code chip #0 */
 	mmio += PDC_CHIP0_OFS;
@@ -1321,15 +1318,25 @@
 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version;
-	struct ata_probe_ent *probe_ent;
+	const struct ata_port_info *ppi[] =
+		{ &pdc_port_info[ent->driver_data], NULL };
+	struct ata_host *host;
 	void __iomem *base;
 	struct pdc_host_priv *hpriv;
-	unsigned int board_idx = (unsigned int) ent->driver_data;
 	int rc;
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 
+	/* allocate host */
+	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 4);
+	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
+	if (!host || !hpriv)
+		return -ENOMEM;
+
+	host->private_data = hpriv;
+
+	/* acquire resources and fill host */
 	rc = pcim_enable_device(pdev);
 	if (rc)
 		return rc;
@@ -1340,7 +1347,15 @@
 		pcim_pin_device(pdev);
 	if (rc)
 		return rc;
+	host->iomap = pcim_iomap_table(pdev);
 
+	base = host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
+	pdc_sata_setup_port(&host->ports[0]->ioaddr, base + 0x200);
+	pdc_sata_setup_port(&host->ports[1]->ioaddr, base + 0x280);
+	pdc_sata_setup_port(&host->ports[2]->ioaddr, base + 0x300);
+	pdc_sata_setup_port(&host->ports[3]->ioaddr, base + 0x380);
+
+	/* configure and activate */
 	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 	if (rc)
 		return rc;
@@ -1348,50 +1363,13 @@
 	if (rc)
 		return rc;
 
-	probe_ent = devm_kzalloc(&pdev->dev, sizeof(*probe_ent), GFP_KERNEL);
-	if (probe_ent == NULL)
+	if (pdc20621_dimm_init(host))
 		return -ENOMEM;
-
-	probe_ent->dev = pci_dev_to_dev(pdev);
-	INIT_LIST_HEAD(&probe_ent->node);
-
-	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
-	if (!hpriv)
-		return -ENOMEM;
-
-	probe_ent->sht		= pdc_port_info[board_idx].sht;
-	probe_ent->port_flags	= pdc_port_info[board_idx].flags;
-	probe_ent->pio_mask	= pdc_port_info[board_idx].pio_mask;
-	probe_ent->mwdma_mask	= pdc_port_info[board_idx].mwdma_mask;
-	probe_ent->udma_mask	= pdc_port_info[board_idx].udma_mask;
-	probe_ent->port_ops	= pdc_port_info[board_idx].port_ops;
-
-       	probe_ent->irq = pdev->irq;
-       	probe_ent->irq_flags = IRQF_SHARED;
-	probe_ent->iomap = pcim_iomap_table(pdev);
-
-	probe_ent->private_data = hpriv;
-	base = probe_ent->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
-
-	probe_ent->n_ports = 4;
-	pdc_sata_setup_port(&probe_ent->port[0], base + 0x200);
-	pdc_sata_setup_port(&probe_ent->port[1], base + 0x280);
-	pdc_sata_setup_port(&probe_ent->port[2], base + 0x300);
-	pdc_sata_setup_port(&probe_ent->port[3], base + 0x380);
+	pdc_20621_init(host);
 
 	pci_set_master(pdev);
-
-	/* initialize adapter */
-	/* initialize local dimm */
-	if (pdc20621_dimm_init(probe_ent))
-		return -ENOMEM;
-	pdc_20621_init(probe_ent);
-
-	if (!ata_device_add(probe_ent))
-		return -ENODEV;
-
-	devm_kfree(&pdev->dev, probe_ent);
-	return 0;
+	return ata_host_activate(host, pdev->irq, pdc20621_interrupt,
+				 IRQF_SHARED, &pdc_sata_sht);
 }