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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2007-09-11 22:28:36 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-09-11 22:28:36 +0200
commit6c3c22f3cb2b7cd0a42a024b93db76b5c3133d37 (patch)
tree13cd84e47c9d354930443ef7db2df1985446ffc4 /include
parent7293136810936bbde403bcb67ac1b4dbae4dd790 (diff)
downloadlinux-linaro-6c3c22f3cb2b7cd0a42a024b93db76b5c3133d37.tar.gz
ide: add ide_dev_is_sata() helper (take 2)
Make the SATA drive detection code from eighty_ninty_three() into inline ide_dev_is_sata() helper fixing it along the way to be more strict while checking word 80 for the reserved values... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ide.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h
index c792b4fd158..b9f66c10caa 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1378,6 +1378,19 @@ static inline int ide_dev_has_iordy(struct hd_driveid *id)
return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
}
+static inline int ide_dev_is_sata(struct hd_driveid *id)
+{
+ /*
+ * See if word 93 is 0 AND drive is at least ATA-5 compatible
+ * verifying that word 80 by casting it to a signed type --
+ * this trick allows us to filter out the reserved values of
+ * 0x0000 and 0xffff along with the earlier ATA revisions...
+ */
+ if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
+ return 1;
+ return 0;
+}
+
u8 ide_dump_status(ide_drive_t *, const char *, u8);
typedef struct ide_pio_timings_s {