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

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: Power off empty ports
  libata-pmp: add support for Thermaltake BlackX Duet esata drive dock
  ATA: Don't powerdown Compaq Triflex IDE device on suspend
  libata: Use Maximum Write Same Length to report discard size limit
  drivers/ata/acard-ahci.c: fix enum warning
  pata_at91: SMC settings calculation bugfixes, support for t6z and IORDY
  libata-sff: prevent irq descriptions for dummy ports
  pata_cm64x: fix boot crash on parisc

11 files changed, 289 insertions, 111 deletions

diff --git a/drivers/ata/acard-ahci.c b/drivers/ata/acard-ahci.c
index 339c210f03a..ae22be4157b 100644
--- a/drivers/ata/acard-ahci.c
+++ b/drivers/ata/acard-ahci.c
@@ -417,7 +417,7 @@ static int acard_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id
 
 	VPRINTK("ENTER\n");
 
-	WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
+	WARN_ON((int)ATA_MAX_QUEUE > AHCI_MAX_CMDS);
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 76c3c15cb1e..736bee5dafe 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3619,8 +3619,14 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 		scontrol |= (0x2 << 8);
 		break;
 	case ATA_LPM_MIN_POWER:
-		/* no restrictions on LPM transitions */
-		scontrol &= ~(0x3 << 8);
+		if (ata_link_nr_enabled(link) > 0)
+			/* no restrictions on LPM transitions */
+			scontrol &= ~(0x3 << 8);
+		else {
+			/* empty port, power off */
+			scontrol &= ~0xf;
+			scontrol |= (0x1 << 2);
+		}
 		break;
 	default:
 		WARN_ON(1);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index dad9fd660f3..dfb6e9d3d75 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3423,7 +3423,7 @@ fail:
 	return rc;
 }
 
-static int ata_link_nr_enabled(struct ata_link *link)
+int ata_link_nr_enabled(struct ata_link *link)
 {
 	struct ata_device *dev;
 	int cnt = 0;
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 3120596d4af..f06b7ea590d 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -449,6 +449,16 @@ static void sata_pmp_quirks(struct ata_port *ap)
 		 * otherwise.  Don't try hard to recover it.
 		 */
 		ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY;
+	} else if (vendor == 0x197b && devid == 0x2352) {
+		/* chip found in Thermaltake BlackX Duet, jmicron JMB350? */
+		ata_for_each_link(link, ap, EDGE) {
+			/* SRST breaks detection and disks get misclassified
+			 * LPM disabled to avoid potential problems
+			 */
+			link->flags |= ATA_LFLAG_NO_LPM |
+				       ATA_LFLAG_NO_SRST |
+				       ATA_LFLAG_ASSUME_ATA;
+		}
 	}
 }
 
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index e2f57e9e12f..30ea95f43e7 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2138,7 +2138,7 @@ static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
 	 * with the unmap bit set.
 	 */
 	if (ata_id_has_trim(args->id)) {
-		put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
+		put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
 		put_unaligned_be32(1, &rbuf[28]);
 	}
 
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index f8380ce0f4d..b1b926c55a7 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2447,13 +2447,18 @@ int ata_pci_sff_activate_host(struct ata_host *host,
 		return -ENOMEM;
 
 	if (!legacy_mode && pdev->irq) {
+		int i;
+
 		rc = devm_request_irq(dev, pdev->irq, irq_handler,
 				      IRQF_SHARED, drv_name, host);
 		if (rc)
 			goto out;
 
-		ata_port_desc(host->ports[0], "irq %d", pdev->irq);
-		ata_port_desc(host->ports[1], "irq %d", pdev->irq);
+		for (i = 0; i < 2; i++) {
+			if (ata_port_is_dummy(host->ports[i]))
+				continue;
+			ata_port_desc(host->ports[i], "irq %d", pdev->irq);
+		}
 	} else if (legacy_mode) {
 		if (!ata_port_is_dummy(host->ports[0])) {
 			rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev),
diff --git a/drivers/ata/pata_at91.c b/drivers/ata/pata_at91.c
index a5fdbdcb0fa..960c7257139 100644
--- a/drivers/ata/pata_at91.c
+++ b/drivers/ata/pata_at91.c
@@ -3,6 +3,7 @@
  * with CompactFlash interface in True IDE mode
  *
  * Copyright (C) 2009 Matyukevich Sergey
+ *               2011 Igor Plyatov
  *
  * Based on:
  *      * generic platform driver by Paul Mundt: drivers/ata/pata_platform.c
@@ -31,38 +32,150 @@
 #include <mach/board.h>
 #include <mach/gpio.h>
 
+#define DRV_NAME		"pata_at91"
+#define DRV_VERSION		"0.3"
 
-#define DRV_NAME "pata_at91"
-#define DRV_VERSION "0.2"
-
-#define CF_IDE_OFFSET	    0x00c00000
-#define CF_ALT_IDE_OFFSET   0x00e00000
-#define CF_IDE_RES_SIZE     0x08
-#define NCS_RD_PULSE_LIMIT  0x3f /* maximal value for pulse bitfields */
+#define CF_IDE_OFFSET		0x00c00000
+#define CF_ALT_IDE_OFFSET	0x00e00000
+#define CF_IDE_RES_SIZE		0x08
+#define CS_PULSE_MAXIMUM	319
+#define ER_SMC_CALC		1
+#define ER_SMC_RECALC		2
 
 struct at91_ide_info {
 	unsigned long mode;
 	unsigned int cs;
-
 	struct clk *mck;
-
 	void __iomem *ide_addr;
 	void __iomem *alt_addr;
 };
 
-static const struct ata_timing initial_timing = {
-	.mode		= XFER_PIO_0,
-	.setup		= 70,
-	.act8b		= 290,
-	.rec8b		= 240,
-	.cyc8b		= 600,
-	.active		= 165,
-	.recover	= 150,
-	.dmack_hold	= 0,
-	.cycle		= 600,
-	.udma		= 0
+/**
+ * struct smc_range - range of valid values for SMC register.
+ */
+struct smc_range {
+	int min;
+	int max;
 };
 
+/**
+ * adjust_smc_value - adjust value for one of SMC registers.
+ * @value: adjusted value
+ * @range: array of SMC ranges with valid values
+ * @size: SMC ranges array size
+ *
+ * This returns the difference between input and output value or negative
+ * in case of invalid input value.
+ * If negative returned, then output value = maximal possible from ranges.
+ */
+static int adjust_smc_value(int *value, struct smc_range *range, int size)
+{
+	int maximum = (range + size - 1)->max;
+	int remainder;
+
+	do {
+		if (*value < range->min) {
+			remainder = range->min - *value;
+			*value = range->min; /* nearest valid value */
+			return remainder;
+		} else if ((range->min <= *value) && (*value <= range->max))
+			return 0;
+
+		range++;
+	} while (--size);
+	*value = maximum;
+
+	return -1; /* invalid value */
+}
+
+/**
+ * calc_smc_vals - calculate SMC register values
+ * @dev: ATA device
+ * @setup: SMC_SETUP register value
+ * @pulse: SMC_PULSE register value
+ * @cycle: SMC_CYCLE register value
+ *
+ * This returns negative in case of invalid values for SMC registers:
+ * -ER_SMC_RECALC - recalculation required for SMC values,
+ * -ER_SMC_CALC - calculation failed (invalid input values).
+ *
+ * SMC use special coding scheme, see "Coding and Range of Timing
+ * Parameters" table from AT91SAM9 datasheets.
+ *
+ *	SMC_SETUP = 128*setup[5] + setup[4:0]
+ *	SMC_PULSE = 256*pulse[6] + pulse[5:0]
+ *	SMC_CYCLE = 256*cycle[8:7] + cycle[6:0]
+ */
+static int calc_smc_vals(struct device *dev,
+		int *setup, int *pulse, int *cycle, int *cs_pulse)
+{
+	int ret_val;
+	int err = 0;
+	struct smc_range range_setup[] = {	/* SMC_SETUP valid values */
+		{.min = 0,	.max = 31},	/* first  range */
+		{.min = 128,	.max = 159}	/* second range */
+	};
+	struct smc_range range_pulse[] = {	/* SMC_PULSE valid values */
+		{.min = 0,	.max = 63},	/* first  range */
+		{.min = 256,	.max = 319}	/* second range */
+	};
+	struct smc_range range_cycle[] = {	/* SMC_CYCLE valid values */
+		{.min = 0,	.max = 127},	/* first  range */
+		{.min = 256,	.max = 383},	/* second range */
+		{.min = 512,	.max = 639},	/* third  range */
+		{.min = 768,	.max = 895}	/* fourth range */
+	};
+
+	ret_val = adjust_smc_value(setup, range_setup, ARRAY_SIZE(range_setup));
+	if (ret_val < 0)
+		dev_warn(dev, "maximal SMC Setup value\n");
+	else
+		*cycle += ret_val;
+
+	ret_val = adjust_smc_value(pulse, range_pulse, ARRAY_SIZE(range_pulse));
+	if (ret_val < 0)
+		dev_warn(dev, "maximal SMC Pulse value\n");
+	else
+		*cycle += ret_val;
+
+	ret_val = adjust_smc_value(cycle, range_cycle, ARRAY_SIZE(range_cycle));
+	if (ret_val < 0)
+		dev_warn(dev, "maximal SMC Cycle value\n");
+
+	*cs_pulse = *cycle;
+	if (*cs_pulse > CS_PULSE_MAXIMUM) {
+		dev_err(dev, "unable to calculate valid SMC settings\n");
+		return -ER_SMC_CALC;
+	}
+
+	ret_val = adjust_smc_value(cs_pulse, range_pulse,
+					ARRAY_SIZE(range_pulse));
+	if (ret_val < 0) {
+		dev_warn(dev, "maximal SMC CS Pulse value\n");
+	} else if (ret_val != 0) {
+		*cycle = *cs_pulse;
+		dev_warn(dev, "SMC Cycle extended\n");
+		err = -ER_SMC_RECALC;
+	}
+
+	return err;
+}
+
+/**
+ * to_smc_format - convert values into SMC format
+ * @setup: SETUP value of SMC Setup Register
+ * @pulse: PULSE value of SMC Pulse Register
+ * @cycle: CYCLE value of SMC Cycle Register
+ * @cs_pulse: NCS_PULSE value of SMC Pulse Register
+ */
+static void to_smc_format(int *setup, int *pulse, int *cycle, int *cs_pulse)
+{
+	*setup = (*setup & 0x1f) | ((*setup & 0x80) >> 2);
+	*pulse = (*pulse & 0x3f) | ((*pulse & 0x100) >> 2);
+	*cycle = (*cycle & 0x7f) | ((*cycle & 0x300) >> 1);
+	*cs_pulse = (*cs_pulse & 0x3f) | ((*cs_pulse & 0x100) >> 2);
+}
+
 static unsigned long calc_mck_cycles(unsigned long ns, unsigned long mck_hz)
 {
 	unsigned long mul;
@@ -80,85 +193,77 @@ static unsigned long calc_mck_cycles(unsigned long ns, unsigned long mck_hz)
 	return (ns * mul + 65536) >> 16;    /* rounding */
 }
 
-static void set_smc_mode(struct at91_ide_info *info)
-{
-	at91_sys_write(AT91_SMC_MODE(info->cs), info->mode);
-	return;
-}
-
-static void set_smc_timing(struct device *dev,
+/**
+ * set_smc_timing - SMC timings setup.
+ * @dev: device
+ * @info: AT91 IDE info
+ * @ata: ATA timings
+ *
+ * Its assumed that write timings are same as read timings,
+ * cs_setup = 0 and cs_pulse = cycle.
+ */
+static void set_smc_timing(struct device *dev, struct ata_device *adev,
 		struct at91_ide_info *info, const struct ata_timing *ata)
 {
-	unsigned long read_cycle, write_cycle, active, recover;
-	unsigned long nrd_setup, nrd_pulse, nrd_recover;
-	unsigned long nwe_setup, nwe_pulse;
-
-	unsigned long ncs_write_setup, ncs_write_pulse;
-	unsigned long ncs_read_setup, ncs_read_pulse;
-
-	unsigned long mck_hz;
-
-	read_cycle  = ata->cyc8b;
-	nrd_setup   = ata->setup;
-	nrd_pulse   = ata->act8b;
-	nrd_recover = ata->rec8b;
-
+	int ret = 0;
+	int use_iordy;
+	unsigned int t6z;         /* data tristate time in ns */
+	unsigned int cycle;       /* SMC Cycle width in MCK ticks */
+	unsigned int setup;       /* SMC Setup width in MCK ticks */
+	unsigned int pulse;       /* CFIOR and CFIOW pulse width in MCK ticks */
+	unsigned int cs_setup = 0;/* CS4 or CS5 setup width in MCK ticks */
+	unsigned int cs_pulse;    /* CS4 or CS5 pulse width in MCK ticks*/
+	unsigned int tdf_cycles;  /* SMC TDF MCK ticks */
+	unsigned long mck_hz;     /* MCK frequency in Hz */
+
+	t6z = (ata->mode < XFER_PIO_5) ? 30 : 20;
 	mck_hz = clk_get_rate(info->mck);
-
-	read_cycle  = calc_mck_cycles(read_cycle, mck_hz);
-	nrd_setup   = calc_mck_cycles(nrd_setup, mck_hz);
-	nrd_pulse   = calc_mck_cycles(nrd_pulse, mck_hz);
-	nrd_recover = calc_mck_cycles(nrd_recover, mck_hz);
-
-	active  = nrd_setup + nrd_pulse;
-	recover = read_cycle - active;
-
-	/* Need at least two cycles recovery */
-	if (recover < 2)
-		read_cycle = active + 2;
-
-	/* (CS0, CS1, DIR, OE) <= (CFCE1, CFCE2, CFRNW, NCSX) timings */
-	ncs_read_setup = 1;
-	ncs_read_pulse = read_cycle - 2;
-	if (ncs_read_pulse > NCS_RD_PULSE_LIMIT) {
-		ncs_read_pulse = NCS_RD_PULSE_LIMIT;
-		dev_warn(dev, "ncs_read_pulse limited to maximal value %lu\n",
-			ncs_read_pulse);
+	cycle = calc_mck_cycles(ata->cyc8b, mck_hz);
+	setup = calc_mck_cycles(ata->setup, mck_hz);
+	pulse = calc_mck_cycles(ata->act8b, mck_hz);
+	tdf_cycles = calc_mck_cycles(t6z, mck_hz);
+
+	do {
+		ret = calc_smc_vals(dev, &setup, &pulse, &cycle, &cs_pulse);
+	} while (ret == -ER_SMC_RECALC);
+
+	if (ret == -ER_SMC_CALC)
+		dev_err(dev, "Interface may not operate correctly\n");
+
+	dev_dbg(dev, "SMC Setup=%u, Pulse=%u, Cycle=%u, CS Pulse=%u\n",
+		setup, pulse, cycle, cs_pulse);
+	to_smc_format(&setup, &pulse, &cycle, &cs_pulse);
+	/* disable or enable waiting for IORDY signal */
+	use_iordy = ata_pio_need_iordy(adev);
+	if (use_iordy)
+		info->mode |= AT91_SMC_EXNWMODE_READY;
+
+	if (tdf_cycles > 15) {
+		tdf_cycles = 15;
+		dev_warn(dev, "maximal SMC TDF Cycles value\n");
 	}
 
-	/* Write timings same as read timings */
-	write_cycle = read_cycle;
-	nwe_setup = nrd_setup;
-	nwe_pulse = nrd_pulse;
-	ncs_write_setup = ncs_read_setup;
-	ncs_write_pulse = ncs_read_pulse;
-
-	dev_dbg(dev, "ATA timings: nrd_setup = %lu nrd_pulse = %lu nrd_cycle = %lu\n",
-			nrd_setup, nrd_pulse, read_cycle);
-	dev_dbg(dev, "ATA timings: nwe_setup = %lu nwe_pulse = %lu nwe_cycle = %lu\n",
-			nwe_setup, nwe_pulse, write_cycle);
-	dev_dbg(dev, "ATA timings: ncs_read_setup = %lu ncs_read_pulse = %lu\n",
-			ncs_read_setup, ncs_read_pulse);
-	dev_dbg(dev, "ATA timings: ncs_write_setup = %lu ncs_write_pulse = %lu\n",
-			ncs_write_setup, ncs_write_pulse);
+	dev_dbg(dev, "Use IORDY=%u, TDF Cycles=%u\n", use_iordy, tdf_cycles);
+	info->mode |= AT91_SMC_TDF_(tdf_cycles);
 
+	/* write SMC Setup Register */
 	at91_sys_write(AT91_SMC_SETUP(info->cs),
-			AT91_SMC_NWESETUP_(nwe_setup) |
-			AT91_SMC_NRDSETUP_(nrd_setup) |
-			AT91_SMC_NCS_WRSETUP_(ncs_write_setup) |
-			AT91_SMC_NCS_RDSETUP_(ncs_read_setup));
-
+			AT91_SMC_NWESETUP_(setup) |
+			AT91_SMC_NRDSETUP_(setup) |
+			AT91_SMC_NCS_WRSETUP_(cs_setup) |
+			AT91_SMC_NCS_RDSETUP_(cs_setup));
+	/* write SMC Pulse Register */
 	at91_sys_write(AT91_SMC_PULSE(info->cs),
-			AT91_SMC_NWEPULSE_(nwe_pulse) |
-			AT91_SMC_NRDPULSE_(nrd_pulse) |
-			AT91_SMC_NCS_WRPULSE_(ncs_write_pulse) |
-			AT91_SMC_NCS_RDPULSE_(ncs_read_pulse));
-
+			AT91_SMC_NWEPULSE_(pulse) |
+			AT91_SMC_NRDPULSE_(pulse) |
+			AT91_SMC_NCS_WRPULSE_(cs_pulse) |
+			AT91_SMC_NCS_RDPULSE_(cs_pulse));
+	/* write SMC Cycle Register */
 	at91_sys_write(AT91_SMC_CYCLE(info->cs),
-			AT91_SMC_NWECYCLE_(write_cycle) |
-			AT91_SMC_NRDCYCLE_(read_cycle));
-
-	return;
+			AT91_SMC_NWECYCLE_(cycle) |
+			AT91_SMC_NRDCYCLE_(cycle));
+	/* write SMC Mode Register*/
+	at91_sys_write(AT91_SMC_MODE(info->cs), info->mode);
 }
 
 static void pata_at91_set_piomode(struct ata_port *ap, struct ata_device *adev)
@@ -172,15 +277,9 @@ static void pata_at91_set_piomode(struct ata_port *ap, struct ata_device *adev)
 	if (ret) {
 		dev_warn(ap->dev, "Failed to compute ATA timing %d, "
 			 "set PIO_0 timing\n", ret);
-		set_smc_timing(ap->dev, info, &initial_timing);
-	} else {
-		set_smc_timing(ap->dev, info, &timing);
+		timing = *ata_timing_find_mode(XFER_PIO_0);
 	}
-
-	/* Setup SMC mode */
-	set_smc_mode(info);
-
-	return;
+	set_smc_timing(ap->dev, adev, info, &timing);
 }
 
 static unsigned int pata_at91_data_xfer_noirq(struct ata_device *dev,
@@ -346,7 +445,7 @@ static int __devexit pata_at91_remove(struct platform_device *pdev)
 static struct platform_driver pata_at91_driver = {
 	.probe		= pata_at91_probe,
 	.remove		= __devexit_p(pata_at91_remove),
-	.driver 	= {
+	.driver		= {
 		.name		= DRV_NAME,
 		.owner		= THIS_MODULE,
 	},
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index 905ff76d3cb..7bafc16cf5e 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -41,6 +41,9 @@
 enum {
 	CFR 		= 0x50,
 		CFR_INTR_CH0  = 0x04,
+	CNTRL		= 0x51,
+		CNTRL_CH0     = 0x04,
+		CNTRL_CH1     = 0x08,
 	CMDTIM 		= 0x52,
 	ARTTIM0 	= 0x53,
 	DRWTIM0 	= 0x54,
@@ -328,9 +331,19 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 			.port_ops = &cmd648_port_ops
 		}
 	};
-	const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
-	u8 mrdmode;
+	const struct ata_port_info *ppi[] = { 
+		&cmd_info[id->driver_data],
+		&cmd_info[id->driver_data],
+		NULL
+	};
+	u8 mrdmode, reg;
 	int rc;
+	struct pci_dev *bridge = pdev->bus->self;
+	/* mobility split bridges don't report enabled ports correctly */
+	int port_ok = !(bridge && bridge->vendor ==
+			PCI_VENDOR_ID_MOBILITY_ELECTRONICS);
+	/* all (with exceptions below) apart from 643 have CNTRL_CH0 bit */
+	int cntrl_ch0_ok = (id->driver_data != 0);
 
 	rc = pcim_enable_device(pdev);
 	if (rc)
@@ -341,11 +354,18 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	if (pdev->device == PCI_DEVICE_ID_CMD_646) {
 		/* Does UDMA work ? */
-		if (pdev->revision > 4)
+		if (pdev->revision > 4) {
 			ppi[0] = &cmd_info[2];
+			ppi[1] = &cmd_info[2];
+		}
 		/* Early rev with other problems ? */
-		else if (pdev->revision == 1)
+		else if (pdev->revision == 1) {
 			ppi[0] = &cmd_info[3];
+			ppi[1] = &cmd_info[3];
+		}
+		/* revs 1,2 have no CNTRL_CH0 */
+		if (pdev->revision < 3)
+			cntrl_ch0_ok = 0;
 	}
 
 	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
@@ -354,6 +374,20 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	mrdmode |= 0x02;	/* Memory read line enable */
 	pci_write_config_byte(pdev, MRDMODE, mrdmode);
 
+	/* check for enabled ports */
+	pci_read_config_byte(pdev, CNTRL, &reg);
+	if (!port_ok)
+		dev_printk(KERN_NOTICE, &pdev->dev, "Mobility Bridge detected, ignoring CNTRL port enable/disable\n");
+	if (port_ok && cntrl_ch0_ok && !(reg & CNTRL_CH0)) {
+		dev_printk(KERN_NOTICE, &pdev->dev, "Primary port is disabled\n");
+		ppi[0] = &ata_dummy_port_info;
+		
+	}
+	if (port_ok && !(reg & CNTRL_CH1)) {
+		dev_printk(KERN_NOTICE, &pdev->dev, "Secondary port is disabled\n");
+		ppi[1] = &ata_dummy_port_info;
+	}
+
 	/* Force PIO 0 here.. */
 
 	/* PPC specific fixup copied from old driver */
diff --git a/drivers/ata/pata_triflex.c b/drivers/ata/pata_triflex.c
index 03b6d69d619..b3e0c943228 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -210,13 +210,34 @@ static const struct pci_device_id triflex[] = {
 	{ },
 };
 
+#ifdef CONFIG_PM
+static int triflex_ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	int rc = 0;
+
+	rc = ata_host_suspend(host, mesg);
+	if (rc)
+		return rc;
+
+	/*
+	 * We must not disable or powerdown the device.
+	 * APM bios refuses to suspend if IDE is not accessible.
+	 */
+	pci_save_state(pdev);
+
+	return 0;
+}
+
+#endif
+
 static struct pci_driver triflex_pci_driver = {
 	.name 		= DRV_NAME,
 	.id_table	= triflex,
 	.probe 		= triflex_init_one,
 	.remove		= ata_pci_remove_one,
 #ifdef CONFIG_PM
-	.suspend	= ata_pci_device_suspend,
+	.suspend	= triflex_ata_pci_device_suspend,
 	.resume		= ata_pci_device_resume,
 #endif
 };
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 04f32a3eb26..5a9926b3407 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1151,6 +1151,7 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 		      ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 		      ata_postreset_fn_t postreset);
 extern void ata_std_error_handler(struct ata_port *ap);
+extern int ata_link_nr_enabled(struct ata_link *link);
 
 /*
  * Base operations to inherit from and initializers for sht
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 8abe8d78c4b..8652a4fa3fe 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -608,6 +608,8 @@
 #define PCI_DEVICE_ID_MATROX_G550	0x2527
 #define PCI_DEVICE_ID_MATROX_VIA	0x4536
 
+#define PCI_VENDOR_ID_MOBILITY_ELECTRONICS	0x14f2
+
 #define PCI_VENDOR_ID_CT		0x102c
 #define PCI_DEVICE_ID_CT_69000		0x00c0
 #define PCI_DEVICE_ID_CT_65545		0x00d8