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>
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 2a36213..5adc2c9 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -947,64 +947,12 @@
* again, the callback function will be called and then we will handle the next
* request.
*/
-
-static u8 ide_tape_wait_ireason(ide_drive_t *drive, u8 ireason)
-{
- ide_hwif_t *hwif = drive->hwif;
- int retries = 100;
-
- while (retries-- && ((ireason & CD) == 0 || (ireason & IO))) {
- printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
- "a packet command, retrying\n", drive->name);
- udelay(100);
- ireason = hwif->INB(hwif->io_ports.nsect_addr);
- if (retries == 0) {
- printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
- "a packet command, ignoring\n",
- drive->name);
- ireason |= CD;
- ireason &= ~IO;
- }
- }
-
- return ireason;
-}
-
static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- struct ide_atapi_pc *pc = tape->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);
- ireason = ide_tape_wait_ireason(drive, ireason);
-
- 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, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
-
- /* Begin DMA, if necessary */
- 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, pc->c, 12);
-
- return ide_started;
+ return ide_transfer_pc(drive, tape->pc, idetape_pc_intr,
+ IDETAPE_WAIT_CMD, NULL);
}
static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,