1 files changed, 51 insertions, 15 deletions

diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 2ad5872fe90..d39ebc23c4a 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -45,7 +45,7 @@
 #include "sata_promise.h"
 
 #define DRV_NAME	"sata_promise"
-#define DRV_VERSION	"2.08"
+#define DRV_VERSION	"2.09"
 
 enum {
 	PDC_MAX_PORTS		= 4,
@@ -128,8 +128,8 @@ struct pdc_port_priv {
 	dma_addr_t		pkt_dma;
 };
 
-static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
 static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 static int pdc_common_port_start(struct ata_port *ap);
 static int pdc_sata_port_start(struct ata_port *ap);
@@ -427,19 +427,20 @@ static int pdc_sata_cable_detect(struct ata_port *ap)
 	return ATA_CBL_SATA;
 }
 
-static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
-	return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+		return -EINVAL;
+	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
-static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
-			       u32 val)
+static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 	writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
@@ -642,8 +643,12 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
 			   | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
 		ac_err_mask |= AC_ERR_HOST_BUS;
 
-	if (sata_scr_valid(ap))
-		ehi->serror |= pdc_sata_scr_read(ap, SCR_ERROR);
+	if (sata_scr_valid(ap)) {
+		u32 serror;
+
+		pdc_sata_scr_read(ap, SCR_ERROR, &serror);
+		ehi->serror |= serror;
+	}
 
 	qc->err_mask |= ac_err_mask;
 
@@ -716,6 +721,9 @@ static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
 	unsigned int i, tmp;
 	unsigned int handled = 0;
 	void __iomem *mmio_base;
+	unsigned int hotplug_offset, ata_no;
+	u32 hotplug_status;
+	int is_sataii_tx4;
 
 	VPRINTK("ENTER\n");
 
@@ -726,10 +734,20 @@ static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
 
 	mmio_base = host->iomap[PDC_MMIO_BAR];
 
+	/* read and clear hotplug flags for all ports */
+	if (host->ports[0]->flags & PDC_FLAG_GEN_II)
+		hotplug_offset = PDC2_SATA_PLUG_CSR;
+	else
+		hotplug_offset = PDC_SATA_PLUG_CSR;
+	hotplug_status = readl(mmio_base + hotplug_offset);
+	if (hotplug_status & 0xff)
+		writel(hotplug_status | 0xff, mmio_base + hotplug_offset);
+	hotplug_status &= 0xff;	/* clear uninteresting bits */
+
 	/* reading should also clear interrupts */
 	mask = readl(mmio_base + PDC_INT_SEQMASK);
 
-	if (mask == 0xffffffff) {
+	if (mask == 0xffffffff && hotplug_status == 0) {
 		VPRINTK("QUICK EXIT 2\n");
 		return IRQ_NONE;
 	}
@@ -737,16 +755,34 @@ static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
 	spin_lock(&host->lock);
 
 	mask &= 0xffff;		/* only 16 tags possible */
-	if (!mask) {
+	if (mask == 0 && hotplug_status == 0) {
 		VPRINTK("QUICK EXIT 3\n");
 		goto done_irq;
 	}
 
 	writel(mask, mmio_base + PDC_INT_SEQMASK);
 
+	is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
+
 	for (i = 0; i < host->n_ports; i++) {
 		VPRINTK("port %u\n", i);
 		ap = host->ports[i];
+
+		/* check for a plug or unplug event */
+		ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
+		tmp = hotplug_status & (0x11 << ata_no);
+		if (tmp && ap &&
+		    !(ap->flags & ATA_FLAG_DISABLED)) {
+			struct ata_eh_info *ehi = &ap->eh_info;
+			ata_ehi_clear_desc(ehi);
+			ata_ehi_hotplugged(ehi);
+			ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
+			ata_port_freeze(ap);
+			++handled;
+			continue;
+		}
+
+		/* check for a packet interrupt */
 		tmp = mask & (1 << (i + 1));
 		if (tmp && ap &&
 		    !(ap->flags & ATA_FLAG_DISABLED)) {
@@ -902,9 +938,9 @@ static void pdc_host_init(struct ata_host *host)
 	tmp = readl(mmio + hotplug_offset);
 	writel(tmp | 0xff, mmio + hotplug_offset);
 
-	/* mask plug/unplug ints */
+	/* unmask plug/unplug ints */
 	tmp = readl(mmio + hotplug_offset);
-	writel(tmp | 0xff0000, mmio + hotplug_offset);
+	writel(tmp & ~0xff0000, mmio + hotplug_offset);
 
 	/* don't initialise TBG or SLEW on 2nd generation chips */
 	if (is_gen2)