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path: root/drivers/ide/pdc202xx_old.c
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Diffstat (limited to 'drivers/ide/pdc202xx_old.c')
-rw-r--r--drivers/ide/pdc202xx_old.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c
index 4f5b536282a..cb812f3700e 100644
--- a/drivers/ide/pdc202xx_old.c
+++ b/drivers/ide/pdc202xx_old.c
@@ -104,6 +104,27 @@ static void pdc202xx_set_pio_mode(ide_drive_t *drive, const u8 pio)
pdc202xx_set_mode(drive, XFER_PIO_0 + pio);
}
+static int pdc202xx_test_irq(ide_hwif_t *hwif)
+{
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+ unsigned long high_16 = pci_resource_start(dev, 4);
+ u8 sc1d = inb(high_16 + 0x1d);
+
+ if (hwif->channel) {
+ /*
+ * bit 7: error, bit 6: interrupting,
+ * bit 5: FIFO full, bit 4: FIFO empty
+ */
+ return ((sc1d & 0x50) == 0x40) ? 1 : 0;
+ } else {
+ /*
+ * bit 3: error, bit 2: interrupting,
+ * bit 1: FIFO full, bit 0: FIFO empty
+ */
+ return ((sc1d & 0x05) == 0x04) ? 1 : 0;
+ }
+}
+
static u8 pdc2026x_cable_detect(ide_hwif_t *hwif)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
@@ -231,6 +252,7 @@ static void __devinit pdc202ata4_fixup_irq(struct pci_dev *dev,
static const struct ide_port_ops pdc20246_port_ops = {
.set_pio_mode = pdc202xx_set_pio_mode,
.set_dma_mode = pdc202xx_set_mode,
+ .test_irq = pdc202xx_test_irq,
};
static const struct ide_port_ops pdc2026x_port_ops = {