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, 33 insertions, 27 deletions

diff --git a/drivers/ide/legacy/qd65xx.c b/drivers/ide/legacy/qd65xx.c
index 8b87a424094a..0c81d2d0b941 100644
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -224,15 +224,14 @@ static void qd_set_timing (ide_drive_t *drive, u8 timing)
         printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
 }
 
-/*
- * qd6500_tune_drive
- */
-
-static void qd6500_tune_drive (ide_drive_t *drive, u8 pio)
+static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
         int active_time   = 175;
         int recovery_time = 415; /* worst case values from the dos driver */
 
+        /*
+         * FIXME: use "pio" value
+         */
         if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
                 && drive->id->tPIO && (drive->id->field_valid & 0x02)
                 && drive->id->eide_pio >= 240) {
@@ -246,11 +245,7 @@ static void qd6500_tune_drive (ide_drive_t *drive, u8 pio)
         qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
 }
 
-/*
- * qd6580_tune_drive
- */
-
-static void qd6580_tune_drive (ide_drive_t *drive, u8 pio)
+static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
         int base = HWIF(drive)->select_data;
         unsigned int cycle_time;
@@ -258,7 +253,6 @@ static void qd6580_tune_drive (ide_drive_t *drive, u8 pio)
         int recovery_time = 415; /* worst case values from the dos driver */
 
         if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
-                pio = ide_get_best_pio_mode(drive, pio, 4);
                 cycle_time = ide_pio_cycle_time(drive, pio);
 
                 switch (pio) {
@@ -335,8 +329,7 @@ static int __init qd_testreg(int port)
  */
 
 static void __init qd_setup(ide_hwif_t *hwif, int base, int config,
-                            unsigned int data0, unsigned int data1,
-                            void (*tuneproc) (ide_drive_t *, u8 pio))
+                            unsigned int data0, unsigned int data1)
 {
         hwif->chipset = ide_qd65xx;
         hwif->channel = hwif->index;
@@ -347,8 +340,6 @@ static void __init qd_setup(ide_hwif_t *hwif, int base, int config,
         hwif->drives[0].io_32bit =
         hwif->drives[1].io_32bit = 1;
         hwif->pio_mask = ATA_PIO4;
-        hwif->tuneproc = tuneproc;
-        probe_hwif_init(hwif);
 }
 
 /*
@@ -361,7 +352,7 @@ static void __exit qd_unsetup(ide_hwif_t *hwif)
 {
         u8 config = hwif->config_data;
         int base = hwif->select_data;
-        void *tuneproc = (void *) hwif->tuneproc;
+        void *set_pio_mode = (void *)hwif->set_pio_mode;
 
         if (hwif->chipset != ide_qd65xx)
                 return;
@@ -369,12 +360,12 @@ static void __exit qd_unsetup(ide_hwif_t *hwif)
         printk(KERN_NOTICE "%s: back to defaults\n", hwif->name);
 
         hwif->selectproc = NULL;
-        hwif->tuneproc = NULL;
+        hwif->set_pio_mode = NULL;
 
-        if (tuneproc == (void *) qd6500_tune_drive) {
+        if (set_pio_mode == (void *)qd6500_set_pio_mode) {
                 // will do it for both
                 qd_write_reg(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
-        } else if (tuneproc == (void *) qd6580_tune_drive) {
+        } else if (set_pio_mode == (void *)qd6580_set_pio_mode) {
                 if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
                         qd_write_reg(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
                         qd_write_reg(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
@@ -424,8 +415,11 @@ static int __init qd_probe(int base)
                         return 1;
                 }
 
-                qd_setup(hwif, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA,
-                         &qd6500_tune_drive);
+                qd_setup(hwif, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA);
+
+                hwif->set_pio_mode = &qd6500_set_pio_mode;
+
+                probe_hwif_init(hwif);
 
                 ide_proc_register_port(hwif);
 
@@ -455,8 +449,12 @@ static int __init qd_probe(int base)
                         printk(KERN_INFO "%s: qd6580: single IDE board\n",
                                          hwif->name);
                         qd_setup(hwif, base, config | (control << 8),
-                                 QD6580_DEF_DATA, QD6580_DEF_DATA2,
-                                 &qd6580_tune_drive);
+                                 QD6580_DEF_DATA, QD6580_DEF_DATA2);
+
+                        hwif->set_pio_mode = &qd6580_set_pio_mode;
+
+                        probe_hwif_init(hwif);
+
                         qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
 
                         ide_proc_register_port(hwif);
@@ -472,11 +470,19 @@ static int __init qd_probe(int base)
                                         hwif->name, mate->name);
 
                         qd_setup(hwif, base, config | (control << 8),
-                                 QD6580_DEF_DATA, QD6580_DEF_DATA,
-                                 &qd6580_tune_drive);
+                                 QD6580_DEF_DATA, QD6580_DEF_DATA);
+
+                        hwif->set_pio_mode = &qd6580_set_pio_mode;
+
+                        probe_hwif_init(hwif);
+
                         qd_setup(mate, base, config | (control << 8),
-                                 QD6580_DEF_DATA2, QD6580_DEF_DATA2,
-                                 &qd6580_tune_drive);
+                                 QD6580_DEF_DATA2, QD6580_DEF_DATA2);
+
+                        mate->set_pio_mode = &qd6580_set_pio_mode;
+
+                        probe_hwif_init(mate);
+
                         qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
 
                         ide_proc_register_port(hwif);