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>
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index aa9f5f0..9560a8f 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -201,8 +201,7 @@
return do_rw_taskfile(drive, args);
case idedisk_pm_restore_pio: /* Resume step 1 (restore PIO) */
- if (drive->hwif->tuneproc != NULL)
- drive->hwif->tuneproc(drive, 255);
+ ide_set_max_pio(drive);
/*
* skip idedisk_pm_idle for ATAPI devices
*/
@@ -788,6 +787,30 @@
return ide_started;
}
+/*
+ * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
+ */
+static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
+{
+ switch (req_pio) {
+ case 202:
+ case 201:
+ case 200:
+ case 102:
+ case 101:
+ case 100:
+ return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
+ case 9:
+ case 8:
+ return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
+ case 7:
+ case 6:
+ return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
+ default:
+ return 0;
+ }
+}
+
/**
* do_special - issue some special commands
* @drive: drive the command is for
@@ -805,9 +828,17 @@
printk("%s: do_special: 0x%02x\n", drive->name, s->all);
#endif
if (s->b.set_tune) {
+ ide_hwif_t *hwif = drive->hwif;
+ u8 req_pio = drive->tune_req;
+
s->b.set_tune = 0;
- if (HWIF(drive)->tuneproc != NULL)
- HWIF(drive)->tuneproc(drive, drive->tune_req);
+
+ if (set_pio_mode_abuse(drive->hwif, req_pio)) {
+ if (hwif->set_pio_mode)
+ hwif->set_pio_mode(drive, req_pio);
+ } else
+ ide_set_pio(drive, req_pio);
+
return ide_stopped;
} else {
if (drive->media == ide_disk)