diff options
author | Elias Oltmanns <eo@nebensachen.de> | 2008-09-19 17:46:01 -0400 |
---|---|---|
committer | Jeff Garzik <jgarzik@redhat.com> | 2008-09-29 00:25:50 -0400 |
commit | ea6ce53cd5d005455ec0a3cc1d45d3af0cb90919 (patch) | |
tree | a6868997eafc92becb5a94646fae4e6485f209ea /include/linux/ata.h | |
parent | 2ad69677b626fc311783b47af25dfecf7be2845b (diff) |
[libata] Introduce ata_id_has_unload()
Add a function to check an ATA device's id for head unload support as
specified in ATA-7.
Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'include/linux/ata.h')
-rw-r--r-- | include/linux/ata.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index 8a12d718c169..a26ebd25bac1 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h | |||
@@ -667,6 +667,15 @@ static inline int ata_id_has_dword_io(const u16 *id) | |||
667 | return 0; | 667 | return 0; |
668 | } | 668 | } |
669 | 669 | ||
670 | static inline int ata_id_has_unload(const u16 *id) | ||
671 | { | ||
672 | if (ata_id_major_version(id) >= 7 && | ||
673 | (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 && | ||
674 | id[ATA_ID_CFSSE] & (1 << 13)) | ||
675 | return 1; | ||
676 | return 0; | ||
677 | } | ||
678 | |||
670 | static inline int ata_id_current_chs_valid(const u16 *id) | 679 | static inline int ata_id_current_chs_valid(const u16 *id) |
671 | { | 680 | { |
672 | /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command | 681 | /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command |