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, 2 insertions, 18 deletions

diff --git a/drivers/ide/pci/cy82c693.c b/drivers/ide/pci/cy82c693.c
index daa36fcbc8ef..dc278025d318 100644
--- a/drivers/ide/pci/cy82c693.c
+++ b/drivers/ide/pci/cy82c693.c
@@ -97,9 +97,6 @@
 #define CY82_INDEX_CHANNEL1     0x31
 #define CY82_INDEX_TIMEOUT      0x32
 
-/* the max PIO mode - from datasheet */
-#define CY82C693_MAX_PIO        4
-
 /* the min and max PCI bus speed in MHz - from datasheet */
 #define CY82C963_MIN_BUS_SPEED  25
 #define CY82C963_MAX_BUS_SPEED  33
@@ -148,9 +145,6 @@ static void compute_clocks (u8 pio, pio_clocks_t *p_pclk)
          * so you can play with the idebus=xx parameter
          */
 
-        if (pio > CY82C693_MAX_PIO)
-                pio = CY82C693_MAX_PIO;
-
         /* let's calc the address setup time clocks */
         p_pclk->address_time = (u8)calc_clk(ide_pio_timings[pio].setup_time, bus_speed);
 
@@ -269,10 +263,7 @@ static int cy82c693_ide_dma_on (ide_drive_t *drive)
         return __ide_dma_on(drive);
 }
 
-/*
- * tune ide drive - set PIO mode
- */
-static void cy82c693_tune_drive (ide_drive_t *drive, u8 pio)
+static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
         ide_hwif_t *hwif = HWIF(drive);
         struct pci_dev *dev = hwif->pci_dev;
@@ -329,13 +320,6 @@ static void cy82c693_tune_drive (ide_drive_t *drive, u8 pio)
                 addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
 #endif /* CY82C693_DEBUG_LOGS */
 
-        /* first let's calc the pio modes */
-        pio = ide_get_best_pio_mode(drive, pio, CY82C693_MAX_PIO);
-
-#if CY82C693_DEBUG_INFO
-        printk (KERN_INFO "%s: Selected PIO mode %d\n", drive->name, pio);
-#endif /* CY82C693_DEBUG_INFO */
-
         /* let's calc the values for this PIO mode */
         compute_clocks(pio, &pclk);
 
@@ -447,7 +431,7 @@ static void __devinit init_hwif_cy82c693(ide_hwif_t *hwif)
         hwif->autodma = 0;
 
         hwif->chipset = ide_cy82c693;
-        hwif->tuneproc = &cy82c693_tune_drive;
+        hwif->set_pio_mode = &cy82c693_set_pio_mode;
 
         if (!hwif->dma_base) {
                 hwif->drives[0].autotune = 1;