1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/ide/legacy/falconide.c b/drivers/ide/legacy/falconide.c
index 56cdaa0eeea5..83555ca513b5 100644
--- a/drivers/ide/legacy/falconide.c
+++ b/drivers/ide/legacy/falconide.c
@@ -44,6 +44,28 @@
 int falconide_intr_lock;
 EXPORT_SYMBOL(falconide_intr_lock);
 
+static void falconide_input_data(ide_drive_t *drive, struct request *rq,
+                                 void *buf, unsigned int len)
+{
+        unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return insw(data_addr, buf, (len + 1) / 2);
+
+        insw_swapw(data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_output_data(ide_drive_t *drive, struct request *rq,
+                                  void *buf, unsigned int len)
+{
+        unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return outsw(data_adr, buf, (len + 1) / 2);
+
+        outsw_swapw(data_addr, buf, (len + 1) / 2);
+}
+
 static void __init falconide_setup_ports(hw_regs_t *hw)
 {
         int i;
@@ -90,6 +112,10 @@ static int __init falconide_init(void)
                 ide_init_port_data(hwif, index);
                 ide_init_port_hw(hwif, &hw);
 
+                /* Atari has a byte-swapped IDE interface */
+                hwif->input_data  = falconide_input_data;
+                hwif->output_data = falconide_output_data;
+
                 ide_get_lock(NULL, NULL);
                 ide_device_add(idx, NULL);
                 ide_release_lock();