scc_pata: add ->tf_{load,read} methods

Add ->tf_{load,read} methods so scc_ide_{outb,outw,inb,inw}()
can be used directly.

There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/pci/scc_pata.c

@@ -618,6 +618,90 @@ static int __devinit init_setup_scc(struct pci_dev *dev,
 	return rc;
 }
 
+static void scc_tf_load(ide_drive_t *drive, ide_task_t *task)
+{
+	struct ide_io_ports *io_ports = &drive->hwif->io_ports;
+	struct ide_taskfile *tf = &task->tf;
+	u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
+
+	if (task->tf_flags & IDE_TFLAG_FLAGGED)
+		HIHI = 0xFF;
+
+	ide_set_irq(drive, 1);
+
+	if (task->tf_flags & IDE_TFLAG_OUT_DATA)
+		scc_ide_outw((tf->hob_data << 8) | tf->data,
+			     io_ports->data_addr);
+
+	if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
+		scc_ide_outb(tf->hob_feature, io_ports->feature_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
+		scc_ide_outb(tf->hob_nsect, io_ports->nsect_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
+		scc_ide_outb(tf->hob_lbal, io_ports->lbal_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
+		scc_ide_outb(tf->hob_lbam, io_ports->lbam_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
+		scc_ide_outb(tf->hob_lbah, io_ports->lbah_addr);
+
+	if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
+		scc_ide_outb(tf->feature, io_ports->feature_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
+		scc_ide_outb(tf->nsect, io_ports->nsect_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
+		scc_ide_outb(tf->lbal, io_ports->lbal_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
+		scc_ide_outb(tf->lbam, io_ports->lbam_addr);
+	if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
+		scc_ide_outb(tf->lbah, io_ports->lbah_addr);
+
+	if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
+		scc_ide_outb((tf->device & HIHI) | drive->select.all,
+			     io_ports->device_addr);
+}
+
+static void scc_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 = scc_ide_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 */
+	scc_ide_outb(drive->ctl & ~0x80, io_ports->ctl_addr);
+
+	if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+		tf->nsect  = scc_ide_inb(io_ports->nsect_addr);
+	if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+		tf->lbal   = scc_ide_inb(io_ports->lbal_addr);
+	if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+		tf->lbam   = scc_ide_inb(io_ports->lbam_addr);
+	if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+		tf->lbah   = scc_ide_inb(io_ports->lbah_addr);
+	if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+		tf->device = scc_ide_inb(io_ports->device_addr);
+
+	if (task->tf_flags & IDE_TFLAG_LBA48) {
+		scc_ide_outb(drive->ctl | 0x80, io_ports->ctl_addr);
+
+		if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+			tf->hob_feature = scc_ide_inb(io_ports->feature_addr);
+		if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+			tf->hob_nsect   = scc_ide_inb(io_ports->nsect_addr);
+		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+			tf->hob_lbal    = scc_ide_inb(io_ports->lbal_addr);
+		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+			tf->hob_lbam    = scc_ide_inb(io_ports->lbam_addr);
+		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+			tf->hob_lbah    = scc_ide_inb(io_ports->lbah_addr);
+	}
+}
+
 static void scc_input_data(ide_drive_t *drive, struct request *rq,
 			   void *buf, unsigned int len)
 {
@@ -664,6 +748,9 @@ static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
 
 	ide_set_hwifdata(hwif, ports);
 
+	hwif->tf_load = scc_tf_load;
+	hwif->tf_read = scc_tf_read;
+
 	hwif->input_data  = scc_input_data;
 	hwif->output_data = scc_output_data;