ata: Remove the AHCI_HFLAG_EDGE_IRQ support from libahci.

[linux-2.6-microblaze.git] / drivers / ata / ahci_xgene.c

diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index e2c6d9e..8b8ccb6 100644 (file)
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -548,6 +548,43 @@ softreset_retry:
        return rc;
 }
 
+static irqreturn_t xgene_ahci_irq_intr(int irq, void *dev_instance)
+{
+       struct ata_host *host = dev_instance;
+       struct ahci_host_priv *hpriv;
+       unsigned int rc = 0;
+       void __iomem *mmio;
+       u32 irq_stat, irq_masked;
+
+       VPRINTK("ENTER\n");
+
+       hpriv = host->private_data;
+       mmio = hpriv->mmio;
+
+       /* sigh.  0xffffffff is a valid return from h/w */
+       irq_stat = readl(mmio + HOST_IRQ_STAT);
+       if (!irq_stat)
+               return IRQ_NONE;
+
+       irq_masked = irq_stat & hpriv->port_map;
+
+       spin_lock(&host->lock);
+
+       /*
+        * HOST_IRQ_STAT behaves as edge triggered latch meaning that
+        * it should be cleared before all the port events are cleared.
+        */
+       writel(irq_stat, mmio + HOST_IRQ_STAT);
+
+       rc = ahci_handle_port_intr(host, irq_masked);
+
+       spin_unlock(&host->lock);
+
+       VPRINTK("EXIT\n");
+
+       return IRQ_RETVAL(rc);
+}
+
 static struct ata_port_operations xgene_ahci_v1_ops = {
        .inherits = &ahci_ops,
        .host_stop = xgene_ahci_host_stop,
@@ -779,7 +816,8 @@ skip_clk_phy:
                hpriv->flags = AHCI_HFLAG_NO_NCQ;
                break;
        case XGENE_AHCI_V2:
-               hpriv->flags |= AHCI_HFLAG_YES_FBS | AHCI_HFLAG_EDGE_IRQ;
+               hpriv->flags |= AHCI_HFLAG_YES_FBS;
+               hpriv->irq_handler = xgene_ahci_irq_intr;
                break;
        default:
                break;