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*.
/**
* ide_get_best_pio_mode - get PIO mode from drive
- * @driver: drive to consider
+ * @drive: drive to consider
* @mode_wanted: preferred mode
- * @max_mode: highest allowed
- * @d: pio data
+ * @max_mode: highest allowed mode
+ * @d: PIO data
*
* This routine returns the recommended PIO settings for a given drive,
* based on the drive->id information and the ide_pio_blacklist[].
- * This is used by most chipset support modules when "auto-tuning".
*
- * Drive PIO mode auto selection
+ * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
+ * This is used by most chipset support modules when "auto-tuning".
*/
u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
if (mode_wanted != 255) {
pio_mode = mode_wanted;
+ use_iordy = (pio_mode > 2);
} else if (!drive->id) {
pio_mode = 0;
} else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
}
}
-#if 0
- if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
-#endif
-
/*
* Conservative "downgrade" for all pre-ATA2 drives
*/
if (pio_mode && pio_mode < 4) {
pio_mode--;
overridden = 1;
-#if 0
- use_iordy = (pio_mode > 2);
-#endif
if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
cycle_time = 0; /* use standard timing */
}