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, 6 insertions, 0 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 1607536ff5fb..cf707c8f08d4 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -98,6 +98,9 @@ if BLK_DEV_IDE
 
 comment "Please see Documentation/ide/ide.txt for help/info on IDE drives"
 
+config IDE_ATAPI
+        bool
+
 config BLK_DEV_IDE_SATA
         bool "Support for SATA (deprecated; conflicts with libata SATA driver)"
         default n
@@ -201,6 +204,7 @@ config BLK_DEV_IDECD_VERBOSE_ERRORS
 
 config BLK_DEV_IDETAPE
         tristate "Include IDE/ATAPI TAPE support"
+        select IDE_ATAPI
         help
           If you have an IDE tape drive using the ATAPI protocol, say Y.
           ATAPI is a newer protocol used by IDE tape and CD-ROM drives,
@@ -223,6 +227,7 @@ config BLK_DEV_IDETAPE
 
 config BLK_DEV_IDEFLOPPY
         tristate "Include IDE/ATAPI FLOPPY support"
+        select IDE_ATAPI
         ---help---
           If you have an IDE floppy drive which uses the ATAPI protocol,
           answer Y.  ATAPI is a newer protocol used by IDE CD-ROM/tape/floppy
@@ -246,6 +251,7 @@ config BLK_DEV_IDEFLOPPY
 config BLK_DEV_IDESCSI
         tristate "SCSI emulation support"
         depends on SCSI
+        select IDE_ATAPI
         ---help---
           WARNING: ide-scsi is no longer needed for cd writing applications!
           The 2.6 kernel supports direct writing to ide-cd, which eliminates