ide: add ide_dev_is_sata() helper (take 2)

[linux-2.6-omap-h63xx.git] / include / linux / ide.h

diff --git a/include/linux/ide.h b/include/linux/ide.h
index c792b4fd1588f1b36c987ebebc45e25489de6021..b9f66c10caa04b26a413fb450ce8237d91c74e5a 100644 (file)
--- 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 {