diff options
Diffstat (limited to 'drivers/ide/ide-lib.c')
| -rw-r--r-- | drivers/ide/ide-lib.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c index 95761884954..8400b1b4aa1 100644 --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -325,6 +325,35 @@ u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode) EXPORT_SYMBOL_GPL(ide_get_best_pio_mode); +/* req_pio == "255" for auto-tune */ +void ide_set_pio(ide_drive_t *drive, u8 req_pio) +{ + ide_hwif_t *hwif = drive->hwif; + u8 host_pio, pio; + + if (hwif->set_pio_mode == NULL) + return; + + BUG_ON(hwif->pio_mask == 0x00); + + host_pio = fls(hwif->pio_mask) - 1; + + pio = ide_get_best_pio_mode(drive, req_pio, host_pio); + + /* + * TODO: + * - report device max PIO mode + * - check req_pio != 255 against device max PIO mode + */ + printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n", + drive->name, host_pio, req_pio, + req_pio == 255 ? "(auto-tune)" : "", pio); + + hwif->set_pio_mode(drive, pio); +} + +EXPORT_SYMBOL_GPL(ide_set_pio); + /** * ide_toggle_bounce - handle bounce buffering * @drive: drive to update |