8 files changed, 103 insertions, 11 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 39d829cd82dd..71afe0371311 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -150,7 +150,7 @@ static const struct ata_port_info ahci_port_info[] = {
         {
                 AHCI_HFLAGS     (AHCI_HFLAG_NO_FPDMA_AA | AHCI_HFLAG_NO_PMP |
                                  AHCI_HFLAG_YES_NCQ),
-                .flags          = AHCI_FLAG_COMMON,
+                .flags          = AHCI_FLAG_COMMON | ATA_FLAG_NO_DIPM,
                 .pio_mask       = ATA_PIO4,
                 .udma_mask      = ATA_UDMA6,
                 .port_ops       = &ahci_ops,
@@ -261,6 +261,12 @@ static const struct pci_device_id ahci_pci_tbl[] = {
         { PCI_VDEVICE(INTEL, 0x1d06), board_ahci }, /* PBG RAID */
         { PCI_VDEVICE(INTEL, 0x2826), board_ahci }, /* PBG RAID */
         { PCI_VDEVICE(INTEL, 0x2323), board_ahci }, /* DH89xxCC AHCI */
+        { PCI_VDEVICE(INTEL, 0x1e02), board_ahci }, /* Panther Point AHCI */
+        { PCI_VDEVICE(INTEL, 0x1e03), board_ahci }, /* Panther Point AHCI */
+        { PCI_VDEVICE(INTEL, 0x1e04), board_ahci }, /* Panther Point RAID */
+        { PCI_VDEVICE(INTEL, 0x1e05), board_ahci }, /* Panther Point RAID */
+        { PCI_VDEVICE(INTEL, 0x1e06), board_ahci }, /* Panther Point RAID */
+        { PCI_VDEVICE(INTEL, 0x1e07), board_ahci }, /* Panther Point RAID */
 
         /* JMicron 360/1/3/5/6, match class to avoid IDE function */
         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 39865009c251..12c5282e7fca 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -229,6 +229,10 @@ enum {
         EM_CTL_ALHD             = (1 << 26), /* Activity LED */
         EM_CTL_XMT              = (1 << 25), /* Transmit Only */
         EM_CTL_SMB              = (1 << 24), /* Single Message Buffer */
+        EM_CTL_SGPIO            = (1 << 19), /* SGPIO messages supported */
+        EM_CTL_SES              = (1 << 18), /* SES-2 messages supported */
+        EM_CTL_SAFTE            = (1 << 17), /* SAF-TE messages supported */
+        EM_CTL_LED              = (1 << 16), /* LED messages supported */
 
         /* em message type */
         EM_MSG_TYPE_LED         = (1 << 0), /* LED */
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 0bc3fd6c3fdb..6f6e7718b05c 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -309,6 +309,14 @@ static const struct pci_device_id piix_pci_tbl[] = {
         { 0x8086, 0x1d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
         /* SATA Controller IDE (PBG) */
         { 0x8086, 0x1d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+        /* SATA Controller IDE (Panther Point) */
+        { 0x8086, 0x1e00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+        /* SATA Controller IDE (Panther Point) */
+        { 0x8086, 0x1e01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+        /* SATA Controller IDE (Panther Point) */
+        { 0x8086, 0x1e08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+        /* SATA Controller IDE (Panther Point) */
+        { 0x8086, 0x1e09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
         { }     /* terminate list */
 };
 
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 26d452339e98..ff9d832a163d 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -109,6 +109,8 @@ static ssize_t ahci_read_em_buffer(struct device *dev,
 static ssize_t ahci_store_em_buffer(struct device *dev,
                                     struct device_attribute *attr,
                                     const char *buf, size_t size);
+static ssize_t ahci_show_em_supported(struct device *dev,
+                                      struct device_attribute *attr, char *buf);
 
 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
@@ -116,6 +118,7 @@ static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO,
                    ahci_read_em_buffer, ahci_store_em_buffer);
+static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL);
 
 struct device_attribute *ahci_shost_attrs[] = {
         &dev_attr_link_power_management_policy,
@@ -126,6 +129,7 @@ struct device_attribute *ahci_shost_attrs[] = {
         &dev_attr_ahci_host_version,
         &dev_attr_ahci_port_cmd,
         &dev_attr_em_buffer,
+        &dev_attr_em_message_supported,
         NULL
 };
 EXPORT_SYMBOL_GPL(ahci_shost_attrs);
@@ -343,6 +347,24 @@ static ssize_t ahci_store_em_buffer(struct device *dev,
         return size;
 }
 
+static ssize_t ahci_show_em_supported(struct device *dev,
+                                      struct device_attribute *attr, char *buf)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct ata_port *ap = ata_shost_to_port(shost);
+        struct ahci_host_priv *hpriv = ap->host->private_data;
+        void __iomem *mmio = hpriv->mmio;
+        u32 em_ctl;
+
+        em_ctl = readl(mmio + HOST_EM_CTL);
+
+        return sprintf(buf, "%s%s%s%s\n",
+                       em_ctl & EM_CTL_LED ? "led " : "",
+                       em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
+                       em_ctl & EM_CTL_SES ? "ses-2 " : "",
+                       em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
+}
+
 /**
  *      ahci_save_initial_config - Save and fixup initial config values
  *      @dev: target AHCI device
@@ -539,6 +561,27 @@ void ahci_start_engine(struct ata_port *ap)
 {
         void __iomem *port_mmio = ahci_port_base(ap);
         u32 tmp;
+        u8 status;
+
+        status = readl(port_mmio + PORT_TFDATA) & 0xFF;
+
+        /*
+         * At end of section 10.1 of AHCI spec (rev 1.3), it states
+         * Software shall not set PxCMD.ST to 1 until it is determined
+         * that a functoinal device is present on the port as determined by
+         * PxTFD.STS.BSY=0, PxTFD.STS.DRQ=0 and PxSSTS.DET=3h
+         *
+         * Even though most AHCI host controllers work without this check,
+         * specific controller will fail under this condition
+         */
+        if (status & (ATA_BUSY | ATA_DRQ))
+                return;
+        else {
+                ahci_scr_read(&ap->link, SCR_STATUS, &tmp);
+
+                if ((tmp & 0xf) != 0x3)
+                        return;
+        }
 
         /* start DMA */
         tmp = readl(port_mmio + PORT_CMD);
@@ -1897,7 +1940,17 @@ static void ahci_pmp_attach(struct ata_port *ap)
         ahci_enable_fbs(ap);
 
         pp->intr_mask |= PORT_IRQ_BAD_PMP;
-        writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+
+        /*
+         * We must not change the port interrupt mask register if the
+         * port is marked frozen, the value in pp->intr_mask will be
+         * restored later when the port is thawed.
+         *
+         * Note that during initialization, the port is marked as
+         * frozen since the irq handler is not yet registered.
+         */
+        if (!(ap->pflags & ATA_PFLAG_FROZEN))
+                writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 static void ahci_pmp_detach(struct ata_port *ap)
@@ -1913,7 +1966,10 @@ static void ahci_pmp_detach(struct ata_port *ap)
         writel(cmd, port_mmio + PORT_CMD);
 
         pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
-        writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+
+        /* see comment above in ahci_pmp_attach() */
+        if (!(ap->pflags & ATA_PFLAG_FROZEN))
+                writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 int ahci_port_resume(struct ata_port *ap)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 423c0a6952b2..76c3c15cb1e6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4139,6 +4139,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
          */
         { "PIONEER DVD-RW  DVRTD08",    "1.00", ATA_HORKAGE_NOSETXFER },
         { "PIONEER DVD-RW  DVR-212D",   "1.28", ATA_HORKAGE_NOSETXFER },
+        { "PIONEER DVD-RW  DVR-216D",   "1.08", ATA_HORKAGE_NOSETXFER },
 
         /* End Marker */
         { }
@@ -5480,7 +5481,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
         if (!ap)
                 return NULL;
 
-        ap->pflags |= ATA_PFLAG_INITIALIZING;
+        ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
         ap->lock = &host->lock;
         ap->print_id = -1;
         ap->host = host;
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 88cd22fa65cd..f26f2fe3480a 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3316,6 +3316,7 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
         struct ata_eh_context *ehc = &link->eh_context;
         struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL;
         enum ata_lpm_policy old_policy = link->lpm_policy;
+        bool no_dipm = ap->flags & ATA_FLAG_NO_DIPM;
         unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM;
         unsigned int err_mask;
         int rc;
@@ -3332,7 +3333,7 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
          */
         ata_for_each_dev(dev, link, ENABLED) {
                 bool hipm = ata_id_has_hipm(dev->id);
-                bool dipm = ata_id_has_dipm(dev->id);
+                bool dipm = ata_id_has_dipm(dev->id) && !no_dipm;
 
                 /* find the first enabled and LPM enabled devices */
                 if (!link_dev)
@@ -3389,7 +3390,8 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 
         /* host config updated, enable DIPM if transitioning to MIN_POWER */
         ata_for_each_dev(dev, link, ENABLED) {
-                if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) {
+                if (policy == ATA_LPM_MIN_POWER && !no_dipm &&
+                    ata_id_has_dipm(dev->id)) {
                         err_mask = ata_dev_set_feature(dev,
                                         SETFEATURES_SATA_ENABLE, SATA_DIPM);
                         if (err_mask && err_mask != AC_ERR_DEV) {
diff --git a/drivers/ata/pata_at91.c b/drivers/ata/pata_at91.c
index 0da0dcc7dd08..a5fdbdcb0faf 100644
--- a/drivers/ata/pata_at91.c
+++ b/drivers/ata/pata_at91.c
@@ -33,11 +33,12 @@
 
 
 #define DRV_NAME "pata_at91"
-#define DRV_VERSION "0.1"
+#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 */
 
 struct at91_ide_info {
         unsigned long mode;
@@ -49,8 +50,18 @@ struct at91_ide_info {
         void __iomem *alt_addr;
 };
 
-static const struct ata_timing initial_timing =
-        {XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0};
+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
+};
 
 static unsigned long calc_mck_cycles(unsigned long ns, unsigned long mck_hz)
 {
@@ -109,6 +120,11 @@ static void set_smc_timing(struct device *dev,
         /* (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);
+        }
 
         /* Write timings same as read timings */
         write_cycle = read_cycle;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 7f675aa81d87..04f32a3eb26b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -137,8 +137,6 @@ enum {
         ATA_DFLAG_ACPI_PENDING  = (1 << 5), /* ACPI resume action pending */
         ATA_DFLAG_ACPI_FAILED   = (1 << 6), /* ACPI on devcfg has failed */
         ATA_DFLAG_AN            = (1 << 7), /* AN configured */
-        ATA_DFLAG_HIPM          = (1 << 8), /* device supports HIPM */
-        ATA_DFLAG_DIPM          = (1 << 9), /* device supports DIPM */
         ATA_DFLAG_DMADIR        = (1 << 10), /* device requires DMADIR */
         ATA_DFLAG_CFG_MASK      = (1 << 12) - 1,
 
@@ -198,6 +196,7 @@ enum {
                                               * management */
         ATA_FLAG_SW_ACTIVITY    = (1 << 22), /* driver supports sw activity
                                               * led */
+        ATA_FLAG_NO_DIPM        = (1 << 23), /* host not happy with DIPM */
 
         /* bits 24:31 of ap->flags are reserved for LLD specific flags */