Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [libata] pata_pcmcia: Add additional id string (corsair, 1GB)
  libata: prevent devices with blank model names from being DMA blacklisted
  ata_piix: SATA 2port controller port map fix
  pata_cs5536: ATA driver for Geode companion chip
  libata: add ST9160821AS / 3.CCD to NCQ blacklist
  libata: fix revalidation issuing after configuration commands
  [libata] sata_nv: add SW NCQ support for MCP51/MCP55/MCP61
  [libata] pata_sil680: Add MMIO support

drivers/ata/Kconfig

@@ -272,6 +272,15 @@ config PATA_CS5535
 
 	  If unsure, say N.
 
+config PATA_CS5536
+	tristate "CS5536 PATA support (Experimental)"
+	depends on PCI && X86 && !X86_64 && EXPERIMENTAL
+	help
+	  This option enables support for the AMD CS5536
+	  companion chip used with the Geode LX processor family.
+
+	  If unsure, say N.
+
 config PATA_CYPRESS
 	tristate "Cypress CY82C693 PATA support (Very Experimental)"
 	depends on PCI && EXPERIMENTAL

drivers/ata/Makefile

@@ -28,6 +28,7 @@ obj-$(CONFIG_PATA_CMD64X)	+= pata_cmd64x.o
 obj-$(CONFIG_PATA_CS5520)	+= pata_cs5520.o
 obj-$(CONFIG_PATA_CS5530)	+= pata_cs5530.o
 obj-$(CONFIG_PATA_CS5535)	+= pata_cs5535.o
+obj-$(CONFIG_PATA_CS5536)	+= pata_cs5536.o
 obj-$(CONFIG_PATA_CYPRESS)	+= pata_cypress.o
 obj-$(CONFIG_PATA_EFAR)		+= pata_efar.o
 obj-$(CONFIG_PATA_HPT366)	+= pata_hpt366.o

drivers/ata/ata_piix.c

@@ -130,6 +130,7 @@ enum {
 	ich8_sata_ahci		= 9,
 	piix_pata_mwdma		= 10,	/* PIIX3 MWDMA only */
 	tolapai_sata_ahci	= 11,
+	ich9_2port_sata		= 12,
 
 	/* constants for mapping table */
 	P0			= 0,  /* port 0 */
@@ -238,19 +239,19 @@ static const struct pci_device_id piix_pci_tbl[] = {
 	/* SATA Controller 1 IDE (ICH8) */
 	{ 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
 	/* SATA Controller 2 IDE (ICH8) */
-	{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
+	{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
 	/* Mobile SATA Controller IDE (ICH8M) */
 	{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
 	/* SATA Controller IDE (ICH9) */
 	{ 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
 	/* SATA Controller IDE (ICH9) */
-	{ 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
+	{ 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
 	/* SATA Controller IDE (ICH9) */
-	{ 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
+	{ 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
 	/* SATA Controller IDE (ICH9M) */
-	{ 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
+	{ 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
 	/* SATA Controller IDE (ICH9M) */
-	{ 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
+	{ 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
 	/* SATA Controller IDE (ICH9M) */
 	{ 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
 	/* SATA Controller IDE (Tolapai) */
@@ -448,6 +449,18 @@ static const struct piix_map_db tolapai_map_db = {
 	},
 };
 
+static const struct piix_map_db ich9_2port_map_db = {
+	.mask = 0x3,
+	.port_enable = 0x3,
+	.map = {
+		/* PM   PS   SM   SS       MAP */
+		{  P0,  NA,  P1,  NA }, /* 00b */
+		{  RV,  RV,  RV,  RV }, /* 01b */
+		{  RV,  RV,  RV,  RV }, /* 10b */
+		{  RV,  RV,  RV,  RV },
+	},
+};
+
 static const struct piix_map_db *piix_map_db_table[] = {
 	[ich5_sata]		= &ich5_map_db,
 	[ich6_sata]		= &ich6_map_db,
@@ -455,6 +468,7 @@ static const struct piix_map_db *piix_map_db_table[] = {
 	[ich6m_sata_ahci]	= &ich6m_map_db,
 	[ich8_sata_ahci]	= &ich8_map_db,
 	[tolapai_sata_ahci]	= &tolapai_map_db,
+	[ich9_2port_sata]	= &ich9_2port_map_db,
 };
 
 static struct ata_port_info piix_port_info[] = {
@@ -570,6 +584,17 @@ static struct ata_port_info piix_port_info[] = {
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &piix_sata_ops,
 	},
+
+	[ich9_2port_sata] =
+	{
+		.sht		= &piix_sht,
+		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
+				  PIIX_FLAG_AHCI,
+		.pio_mask	= 0x1f,	/* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= ATA_UDMA6,
+		.port_ops	= &piix_sata_ops,
+	},
 };
 
 static struct pci_bits piix_enable_bits[] = {

drivers/ata/libata-core.c

@@ -3984,6 +3984,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "ST9120822AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
 	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
 	{ "ST9160821AS",	"3.ALD",	ATA_HORKAGE_NONCQ, },
+	{ "ST9160821AS",	"3.CCD",	ATA_HORKAGE_NONCQ, },
 	{ "ST3160812AS",	"3.ADJ",	ATA_HORKAGE_NONCQ, },
 	{ "ST980813AS",		"3.ADB",	ATA_HORKAGE_NONCQ, },
 	{ "SAMSUNG HD401LJ",	"ZZ100-15",	ATA_HORKAGE_NONCQ, },
@@ -4013,8 +4014,14 @@ int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
 	p = strchr(patt, wildchar);
 	if (p && ((*(p + 1)) == 0))
 		len = p - patt;
-	else
+	else {
 		len = strlen(name);
+		if (!len) {
+			if (!*patt)
+				return 0;
+			return -1;
+		}
+	}
 
 	return strncmp(patt, name, len);
 }

drivers/ata/libata-scsi.c

@@ -1363,6 +1363,7 @@ nothing_to_do:
 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
+	struct ata_eh_info *ehi = &qc->dev->link->eh_info;
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	u8 *cdb = cmd->cmnd;
  	int need_sense = (qc->err_mask != 0);
@@ -1376,14 +1377,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
 		case ATA_CMD_SET_FEATURES:
 			if ((qc->tf.feature == SETFEATURES_WC_ON) ||
 			    (qc->tf.feature == SETFEATURES_WC_OFF)) {
-				ap->link.eh_info.action |= ATA_EH_REVALIDATE;
+				ehi->action |= ATA_EH_REVALIDATE;
 				ata_port_schedule_eh(ap);
 			}
 			break;
 
 		case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
 		case ATA_CMD_SET_MULTI: /* multi_count changed */
-			ap->link.eh_info.action |= ATA_EH_REVALIDATE;
+			ehi->action |= ATA_EH_REVALIDATE;
 			ata_port_schedule_eh(ap);
 			break;
 		}

drivers/ata/pata_cs5536.c

+/*
+ * pata_cs5536.c	- CS5536 PATA for new ATA layer
+ *			  (C) 2007 Martin K. Petersen <mkp@mkp.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307	 USA
+ *
+ * Documentation:
+ *	Available from AMD web site.
+ *
+ * The IDE timing registers for the CS5536 live in the Geode Machine
+ * Specific Register file and not PCI config space.  Most BIOSes
+ * virtualize the PCI registers so the chip looks like a standard IDE
+ * controller.	Unfortunately not all implementations get this right.
+ * In particular some have problems with unaligned accesses to the
+ * virtualized PCI registers.  This driver always does full dword
+ * writes to work around the issue.  Also, in case of a bad BIOS this
+ * driver can be loaded with the "msr=1" parameter which forces using
+ * the Machine Specific Registers to configure the device.
+ */
+
+#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/libata.h>
+#include <scsi/scsi_host.h>
+#include <asm/msr.h>
+
+#define DRV_NAME	"pata_cs5536"
+#define DRV_VERSION	"0.0.5"
+
+enum {
+	CFG			= 0,
+	DTC			= 1,
+	CAST			= 2,
+	ETC			= 3,
+
+	MSR_IDE_BASE		= 0x51300000,
+	MSR_IDE_CFG		= (MSR_IDE_BASE + 0x10),
+	MSR_IDE_DTC		= (MSR_IDE_BASE + 0x12),
+	MSR_IDE_CAST		= (MSR_IDE_BASE + 0x13),
+	MSR_IDE_ETC		= (MSR_IDE_BASE + 0x14),
+
+	PCI_IDE_CFG		= 0x40,
+	PCI_IDE_DTC		= 0x48,
+	PCI_IDE_CAST		= 0x4c,
+	PCI_IDE_ETC		= 0x50,
+
+	IDE_CFG_CHANEN		= 0x2,
+	IDE_CFG_CABLE		= 0x10000,
+
+	IDE_D0_SHIFT		= 24,
+	IDE_D1_SHIFT		= 16,
+	IDE_DRV_MASK		= 0xff,
+
+	IDE_CAST_D0_SHIFT	= 6,
+	IDE_CAST_D1_SHIFT	= 4,
+	IDE_CAST_DRV_MASK	= 0x3,
+	IDE_CAST_CMD_MASK	= 0xff,
+	IDE_CAST_CMD_SHIFT	= 24,
+
+	IDE_ETC_NODMA		= 0x03,
+};
+
+static int use_msr;
+
+static const u32 msr_reg[4] = {
+	MSR_IDE_CFG, MSR_IDE_DTC, MSR_IDE_CAST, MSR_IDE_ETC,
+};
+
+static const u8 pci_reg[4] = {
+	PCI_IDE_CFG, PCI_IDE_DTC, PCI_IDE_CAST, PCI_IDE_ETC,
+};
+
+static inline int cs5536_read(struct pci_dev *pdev, int reg, int *val)
+{
+	if (unlikely(use_msr)) {
+		u32 dummy;
+
+		rdmsr(msr_reg[reg], *val, dummy);
+		return 0;
+	}
+
+	return pci_read_config_dword(pdev, pci_reg[reg], val);
+}
+
+static inline int cs5536_write(struct pci_dev *pdev, int reg, int val)
+{
+	if (unlikely(use_msr)) {
+		wrmsr(msr_reg[reg], val, 0);
+		return 0;
+	}
+
+	return pci_write_config_dword(pdev, pci_reg[reg], val);
+}
+
+/**
+ *	cs5536_cable_detect	-	detect cable type
+ *	@ap: Port to detect on
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Perform cable detection for ATA66 capable cable. Return a libata
+ *	cable type.
+ */
+
+static int cs5536_cable_detect(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 cfg;
+
+	cs5536_read(pdev, CFG, &cfg);
+
+	if (cfg & (IDE_CFG_CABLE << ap->port_no))
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
+/**
+ *	cs5536_set_piomode		-	PIO setup
+ *	@ap: ATA interface
+ *	@adev: device on the interface
+ */
+
+static void cs5536_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	static const u8 drv_timings[5] = {
+		0x98, 0x55, 0x32, 0x21, 0x20,
+	};
+
+	static const u8 addr_timings[5] = {
+		0x2, 0x1, 0x0, 0x0, 0x0,
+	};
+
+	static const u8 cmd_timings[5] = {
+		0x99, 0x92, 0x90, 0x22, 0x20,
+	};
+
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct ata_device *pair = ata_dev_pair(adev);
+	int mode = adev->pio_mode - XFER_PIO_0;
+	int cmdmode = mode;
+	int dshift = ap->port_no ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+	int cshift = ap->port_no ? IDE_CAST_D1_SHIFT : IDE_CAST_D0_SHIFT;
+	u32 dtc, cast, etc;
+
+	if (pair)
+		cmdmode = min(mode, pair->pio_mode - XFER_PIO_0);
+
+	cs5536_read(pdev, DTC, &dtc);
+	cs5536_read(pdev, CAST, &cast);
+	cs5536_read(pdev, ETC, &etc);
+
+	dtc &= ~(IDE_DRV_MASK << dshift);
+	dtc |= drv_timings[mode] << dshift;
+
+	cast &= ~(IDE_CAST_DRV_MASK << cshift);
+	cast |= addr_timings[mode] << cshift;
+
+	cast &= ~(IDE_CAST_CMD_MASK << IDE_CAST_CMD_SHIFT);
+	cast |= cmd_timings[cmdmode] << IDE_CAST_CMD_SHIFT;
+
+	etc &= ~(IDE_DRV_MASK << dshift);
+	etc |= IDE_ETC_NODMA << dshift;
+
+	cs5536_write(pdev, DTC, dtc);
+	cs5536_write(pdev, CAST, cast);
+	cs5536_write(pdev, ETC, etc);
+}
+
+/**
+ *	cs5536_set_dmamode		-	DMA timing setup
+ *	@ap: ATA interface
+ *	@adev: Device being configured
+ *
+ */
+
+static void cs5536_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	static const u8 udma_timings[6] = {
+		0xc2, 0xc1, 0xc0, 0xc4, 0xc5, 0xc6,
+	};
+
+	static const u8 mwdma_timings[3] = {
+		0x67, 0x21, 0x20,
+	};
+
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u32 dtc, etc;
+	int mode = adev->dma_mode;
+	int dshift = ap->port_no ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+
+	if (mode >= XFER_UDMA_0) {
+		cs5536_read(pdev, ETC, &etc);
+
+		etc &= ~(IDE_DRV_MASK << dshift);
+		etc |= udma_timings[mode - XFER_UDMA_0] << dshift;
+
+		cs5536_write(pdev, ETC, etc);
+	} else { /* MWDMA */
+		cs5536_read(pdev, DTC, &dtc);
+
+		dtc &= ~(IDE_DRV_MASK << dshift);
+		dtc |= mwdma_timings[mode] << dshift;
+
+		cs5536_write(pdev, DTC, dtc);
+	}
+}
+
+static struct scsi_host_template cs5536_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 struct ata_port_operations cs5536_port_ops = {
+	.port_disable		= ata_port_disable,
+	.set_piomode		= cs5536_set_piomode,
+	.set_dmamode		= cs5536_set_dmamode,
+	.mode_filter		= ata_pci_default_filter,
+
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.exec_command		= ata_exec_command,
+	.dev_select		= ata_std_dev_select,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= ata_bmdma_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+	.cable_detect		= cs5536_cable_detect,
+
+	.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,
+
+	.data_xfer		= ata_data_xfer,
+
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.irq_on			= ata_irq_on,
+	.irq_ack		= ata_irq_ack,
+
+	.port_start		= ata_port_start,
+};
+
+/**
+ *	cs5536_init_one
+ *	@dev: PCI device
+ *	@id: Entry in match table
+ *
+ */
+
+static int cs5536_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	static const struct ata_port_info info = {
+		.sht = &cs5536_sht,
+		.flags = ATA_FLAG_SLAVE_POSS,
+		.pio_mask = 0x1f,
+		.mwdma_mask = 0x07,
+		.udma_mask = ATA_UDMA5,
+		.port_ops = &cs5536_port_ops,
+	};
+
+	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
+	u32 cfg;
+
+	if (use_msr)
+		printk(KERN_ERR DRV_NAME ": Using MSR regs instead of PCI\n");
+
+	cs5536_read(dev, CFG, &cfg);
+
+	if ((cfg & IDE_CFG_CHANEN) == 0) {
+		printk(KERN_ERR DRV_NAME ": disabled by BIOS\n");
+		return -ENODEV;
+	}
+
+	return ata_pci_init_one(dev, ppi);
+}
+
+static const struct pci_device_id cs5536[] = {
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_IDE), },
+	{ },
+};
+
+static struct pci_driver cs5536_pci_driver = {
+	.name		= DRV_NAME,
+	.id_table	= cs5536,
+	.probe		= cs5536_init_one,
+	.remove		= ata_pci_remove_one,
+#ifdef CONFIG_PM
+	.suspend	= ata_pci_device_suspend,
+	.resume		= ata_pci_device_resume,
+#endif
+};
+
+static int __init cs5536_init(void)
+{
+	return pci_register_driver(&cs5536_pci_driver);
+}
+
+static void __exit cs5536_exit(void)
+{
+	pci_unregister_driver(&cs5536_pci_driver);
+}
+
+MODULE_AUTHOR("Martin K. Petersen");
+MODULE_DESCRIPTION("low-level driver for the CS5536 IDE controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cs5536);
+MODULE_VERSION(DRV_VERSION);
+module_param_named(msr, use_msr, int, 0644);
+MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
+
+module_init(cs5536_init);
+module_exit(cs5536_exit);

drivers/ata/pata_pcmcia.c

@@ -353,6 +353,7 @@ static void pcmcia_remove_one(struct pcmcia_device *pdev)
 
 static struct pcmcia_device_id pcmcia_devices[] = {
 	PCMCIA_DEVICE_FUNC_ID(4),
+	PCMCIA_DEVICE_MANF_CARD(0x0000, 0x0000),	/* Corsair */
 	PCMCIA_DEVICE_MANF_CARD(0x0007, 0x0000),	/* Hitachi */
 	PCMCIA_DEVICE_MANF_CARD(0x000a, 0x0000),	/* I-O Data CFA */
 	PCMCIA_DEVICE_MANF_CARD(0x001c, 0x0001),	/* Mitsubishi CFA */
@@ -378,6 +379,7 @@ static struct pcmcia_device_id pcmcia_devices[] = {
 	PCMCIA_DEVICE_PROD_ID12("EXP   ", "CD-ROM", 0x0a5c52fd, 0x66536591),
 	PCMCIA_DEVICE_PROD_ID12("EXP   ", "PnPIDE", 0x0a5c52fd, 0x0c694728),
 	PCMCIA_DEVICE_PROD_ID12("FREECOM", "PCCARD-IDE", 0x5714cbf7, 0x48e0ab8e),
+	PCMCIA_DEVICE_PROD_ID12("Hyperstone", "Model1", 0x3d5b9ef5, 0xca6ab420),
 	PCMCIA_DEVICE_PROD_ID12("HITACHI", "FLASH", 0xf4f43949, 0x9eb86aae),
 	PCMCIA_DEVICE_PROD_ID12("HITACHI", "microdrive", 0xf4f43949, 0xa6d76178),
 	PCMCIA_DEVICE_PROD_ID12("IBM", "microdrive", 0xb569a6e5, 0xa6d76178),

drivers/ata/pata_sil680.c

@@ -279,7 +279,7 @@ static struct ata_port_operations sil680_port_ops = {
  *	Returns the final clock settings.
  */
 
-static u8 sil680_init_chip(struct pci_dev *pdev)
+static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
 {
 	u32 class_rev	= 0;
 	u8 tmpbyte	= 0;
@@ -297,6 +297,8 @@ static u8 sil680_init_chip(struct pci_dev *pdev)
 	dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
 		tmpbyte & 1, tmpbyte & 0x30);
 
+	*try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
+
 	switch(tmpbyte & 0x30) {
 		case 0x00:
 			/* 133 clock attempt to force it on */
@@ -361,25 +363,76 @@ static int __devinit sil680_init_one(struct pci_dev *pdev,
 	};
 	const struct ata_port_info *ppi[] = { &info, NULL };
 	static int printed_version;
+	struct ata_host *host;
+	void __iomem *mmio_base;
+	int rc, try_mmio;
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 
-	switch(sil680_init_chip(pdev))
-	{
+	switch (sil680_init_chip(pdev, &try_mmio)) {
 		case 0:
 			ppi[0] = &info_slow;
 			break;
 		case 0x30:
 			return -ENODEV;
 	}
+
+	if (!try_mmio)
+		goto use_ioports;
+
+	/* Try to acquire MMIO resources and fallback to PIO if
+	 * that fails
+	 */
+	rc = pcim_enable_device(pdev);
+	if (rc)
+		return rc;
+	rc = pcim_iomap_regions(pdev, 1 << SIL680_MMIO_BAR, DRV_NAME);
+	if (rc)
+		goto use_ioports;
+
+	/* Allocate host and set it up */
+	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
+	if (!host)
+		return -ENOMEM;
+	host->iomap = pcim_iomap_table(pdev);
+
+	/* Setup DMA masks */
+	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		return rc;
+	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		return rc;
+	pci_set_master(pdev);
+
+	/* Get MMIO base and initialize port addresses */
+	mmio_base = host->iomap[SIL680_MMIO_BAR];
+	host->ports[0]->ioaddr.bmdma_addr = mmio_base + 0x00;
+	host->ports[0]->ioaddr.cmd_addr = mmio_base + 0x80;
+	host->ports[0]->ioaddr.ctl_addr = mmio_base + 0x8a;
+	host->ports[0]->ioaddr.altstatus_addr = mmio_base + 0x8a;
+	ata_std_ports(&host->ports[0]->ioaddr);
+	host->ports[1]->ioaddr.bmdma_addr = mmio_base + 0x08;
+	host->ports[1]->ioaddr.cmd_addr = mmio_base + 0xc0;
+	host->ports[1]->ioaddr.ctl_addr = mmio_base + 0xca;
+	host->ports[1]->ioaddr.altstatus_addr = mmio_base + 0xca;
+	ata_std_ports(&host->ports[1]->ioaddr);
+
+	/* Register & activate */
+	return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
+				 &sil680_sht);
+
+use_ioports:
 	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
 static int sil680_reinit_one(struct pci_dev *pdev)
 {
-	sil680_init_chip(pdev);
+	int try_mmio;
+
+	sil680_init_chip(pdev, &try_mmio);
 	return ata_pci_device_resume(pdev);
 }
 #endif