diff options
Diffstat (limited to 'drivers/ide/ide-lib.c')
| -rw-r--r-- | drivers/ide/ide-lib.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c index bea5e13ee361..8afce4ceea31 100644 --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -205,6 +205,21 @@ int ide_dma_enable (ide_drive_t *drive) EXPORT_SYMBOL(ide_dma_enable); +int ide_use_fast_pio(ide_drive_t *drive) +{ + struct hd_driveid *id = drive->id; + + if ((id->capability & 1) && drive->autodma) + return 1; + + if ((id->capability & 8) || (id->field_valid & 2)) + return 1; + + return 0; +} + +EXPORT_SYMBOL_GPL(ide_use_fast_pio); + /* * Standard (generic) timings for PIO modes, from ATA2 specification. * These timings are for access to the IDE data port register *only*. |