ide: add ide_set{_max}_pio() (take 4)

* Add IDE_HFLAG_ABUSE_{PREFETCH,FAST_DEVSEL,DMA_MODES} flags
  and set them in ht6560, cmd640, cmd64x and sc1200 host drivers.

* Add set_pio_mode_abuse() for checking if host driver has a non-standard
  ->tuneproc() implementation and use it in do_special().

* Add ide_set_pio() for setting PIO mode (it uses hwif->pio_mask to find
  the maximum PIO mode supported by the host), also add ide_set_max_pio()
  wrapper for ide_set_pio() to use for auto-tuning.  Convert users of
  ->tuneproc to use ide_set{_max}_pio() where possible.  This leaves only
  do_special(), set_using_pio(), ide_hwif_restore() and ide_set_pio() as
  a direct users of ->tuneproc.

* Remove no longer needed ide_get_best_pio_mode() calls and printk-s
  reporting PIO mode selected from ->tuneproc implementations.

* Rename ->tuneproc hook to ->set_pio_mode and make 'pio' argument const.

* Remove stale comment from ide_config_drive_speed().

v2:
* Fix "ata_" prefix (Noticed by Jeff).

v3:
* Minor cleanups/fixups per Sergei's suggestions.

v4:
* Fix compile problem in drivers/ide/pci/cmd640.c
  (Noticed by Andrew Morton).

* Improve some ->set_pio_mode comments.

Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 5 insertions, 12 deletions

diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index 9f425b0b5721..131e91ca1d82 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -75,16 +75,12 @@ static unsigned int get_pio_timings(ide_drive_t *drive, u8 pio)
 /*
  * Configure the chipset for PIO mode.
  */
-static u8 sl82c105_tune_pio(ide_drive_t *drive, u8 pio)
+static void sl82c105_tune_pio(ide_drive_t *drive, const u8 pio)
 {
         struct pci_dev *dev     = HWIF(drive)->pci_dev;
         int reg                 = 0x44 + drive->dn * 4;
         u16 drv_ctrl;
 
-        DBG(("sl82c105_tune_pio(drive:%s, pio:%u)\n", drive->name, pio));
-
-        pio = ide_get_best_pio_mode(drive, pio, 5);
-
         drv_ctrl = get_pio_timings(drive, pio);
 
         /*
@@ -106,8 +102,6 @@ static u8 sl82c105_tune_pio(ide_drive_t *drive, u8 pio)
         printk(KERN_DEBUG "%s: selected %s (%dns) (%04X)\n", drive->name,
                           ide_xfer_verbose(pio + XFER_PIO_0),
                           ide_pio_cycle_time(drive, pio), drv_ctrl);
-
-        return pio;
 }
 
 /*
@@ -151,7 +145,7 @@ static int sl82c105_tune_chipset(ide_drive_t *drive, const u8 speed)
         case XFER_PIO_2:
         case XFER_PIO_1:
         case XFER_PIO_0:
-                (void) sl82c105_tune_pio(drive, speed - XFER_PIO_0);
+                sl82c105_tune_pio(drive, speed - XFER_PIO_0);
                 break;
         default:
                 return -1;
@@ -325,11 +319,10 @@ static void sl82c105_resetproc(ide_drive_t *drive)
  * We only deal with PIO mode here - DMA mode 'using_dma' is not
  * initialised at the point that this function is called.
  */
-static void sl82c105_tune_drive(ide_drive_t *drive, u8 pio)
+static void sl82c105_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
-        DBG(("sl82c105_tune_drive(drive:%s, pio:%u)\n", drive->name, pio));
+        sl82c105_tune_pio(drive, pio);
 
-        pio = sl82c105_tune_pio(drive, pio);
         (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 }
 
@@ -397,7 +390,7 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
 
         DBG(("init_hwif_sl82c105(hwif: ide%d)\n", hwif->index));
 
-        hwif->tuneproc          = &sl82c105_tune_drive;
+        hwif->set_pio_mode      = &sl82c105_set_pio_mode;
         hwif->speedproc         = &sl82c105_tune_chipset;
         hwif->selectproc        = &sl82c105_selectproc;
         hwif->resetproc         = &sl82c105_resetproc;