1 files changed, 44 insertions, 0 deletions

diff --git a/drivers/ide/pci/ns87415.c b/drivers/ide/pci/ns87415.c
index c13e299077ec..fec4955f449b 100644
--- a/drivers/ide/pci/ns87415.c
+++ b/drivers/ide/pci/ns87415.c
@@ -63,6 +63,48 @@ static u8 superio_ide_inb (unsigned long port)
         return inb(port);
 }
 
+static void superio_tf_read(ide_drive_t *drive, ide_task_t *task)
+{
+        struct ide_io_ports *io_ports = &drive->hwif->io_ports;
+        struct ide_taskfile *tf = &task->tf;
+
+        if (task->tf_flags & IDE_TFLAG_IN_DATA) {
+                u16 data = inw(io_ports->data_addr);
+
+                tf->data = data & 0xff;
+                tf->hob_data = (data >> 8) & 0xff;
+        }
+
+        /* be sure we're looking at the low order bits */
+        outb(drive->ctl & ~0x80, io_ports->ctl_addr);
+
+        if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+                tf->nsect  = inb(io_ports->nsect_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+                tf->lbal   = inb(io_ports->lbal_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+                tf->lbam   = inb(io_ports->lbam_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+                tf->lbah   = inb(io_ports->lbah_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+                tf->device = superio_ide_inb(io_ports->device_addr);
+
+        if (task->tf_flags & IDE_TFLAG_LBA48) {
+                outb(drive->ctl | 0x80, io_ports->ctl_addr);
+
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+                        tf->hob_feature = inb(io_ports->feature_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+                        tf->hob_nsect   = inb(io_ports->nsect_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+                        tf->hob_lbal    = inb(io_ports->lbal_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+                        tf->hob_lbam    = inb(io_ports->lbam_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+                        tf->hob_lbah    = inb(io_ports->lbah_addr);
+        }
+}
+
 static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
 {
         struct pci_dev *pdev = to_pci_dev(hwif->dev);
@@ -80,6 +122,8 @@ static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
         tmp = superio_ide_inb(superio_ide_dma_status[port]);
         outb(tmp | 0x66, superio_ide_dma_status[port]);
 
+        hwif->tf_read = superio_tf_read;
+
         /* We need to override inb to workaround a SuperIO errata */
         hwif->INB = superio_ide_inb;
 }