ide: add ide_transfer_pc() helper

* Add ide-atapi.c file for generic ATAPI support together with
  CONFIG_IDE_ATAPI config option.

* Add generic ide_transfer_pc() helper to ide-atapi.c and then
  convert ide-{floppy,tape,scsi} device drivers to use it.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 2 insertions, 28 deletions

diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index c9fdf60c9dc..d41348f2245 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -453,36 +453,10 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 
 static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-        struct ide_atapi_pc *pc = scsi->pc;
-        ide_startstop_t startstop;
-        u8 ireason;
-
-        if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
-                printk(KERN_ERR "%s: Strange, packet command initiated yet "
-                                "DRQ isn't asserted\n", drive->name);
-                return startstop;
-        }
-        ireason = hwif->INB(hwif->io_ports.nsect_addr);
-        if ((ireason & CD) == 0 || (ireason & IO)) {
-                printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
-                                "a packet command\n", drive->name);
-                return ide_do_reset (drive);
-        }
 
-        /* Set the interrupt routine */
-        ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
-
-        if (pc->flags & PC_FLAG_DMA_OK) {
-                pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
-                hwif->dma_ops->dma_start(drive);
-        }
-
-        /* Send the actual packet */
-        hwif->output_data(drive, NULL, scsi->pc->c, 12);
-
-        return ide_started;
+        return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr,
+                               get_timeout(scsi->pc), idescsi_expiry);
 }
 
 static inline int idescsi_set_direction(struct ide_atapi_pc *pc)