Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

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

diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index fcdc11b9609b7c2efc4318811375a30574d7c586..a5cd2047624ef4e721914e52cf051521c134f704 100644 (file)
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -1187,6 +1187,20 @@ struct media_event_desc {
 
 extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
 
+static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
+{
+       lba += CD_MSF_OFFSET;
+       lba &= 0xffffff;  /* negative lbas use only 24 bits */
+       *m = lba / (CD_SECS * CD_FRAMES);
+       lba %= (CD_SECS * CD_FRAMES);
+       *s = lba / CD_FRAMES;
+       *f = lba % CD_FRAMES;
+}
+
+static inline int msf_to_lba(u8 m, u8 s, u8 f)
+{
+       return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
+}
 #endif  /* End of kernel only stuff */ 
 
 #endif  /* _LINUX_CDROM_H */