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Diffstat (limited to 'drivers/ata/libata-sff.c')
-rw-r--r--drivers/ata/libata-sff.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index e178d6ae8b8..37471d3c1c2 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -39,6 +39,35 @@
#include "libata.h"
/**
+ * ata_irq_on - Enable interrupts on a port.
+ * @ap: Port on which interrupts are enabled.
+ *
+ * Enable interrupts on a legacy IDE device using MMIO or PIO,
+ * wait for idle, clear any pending interrupts.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+u8 ata_irq_on(struct ata_port *ap)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ u8 tmp;
+
+ ap->ctl &= ~ATA_NIEN;
+ ap->last_ctl = ap->ctl;
+
+ if (ap->flags & ATA_FLAG_MMIO)
+ writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
+ else
+ outb(ap->ctl, ioaddr->ctl_addr);
+ tmp = ata_wait_idle(ap);
+
+ ap->ops->irq_clear(ap);
+
+ return tmp;
+}
+
+/**
* ata_tf_load_pio - send taskfile registers to host controller
* @ap: Port to which output is sent
* @tf: ATA taskfile register set