X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=include%2Flinux%2Ffirewire-cdev.h;h=0f0e271f97fa1f0fa7248cafc9c579e8be20fe00;hb=e2d2647702702ea08cb78cdc9eca8c24242aa9be;hp=1a45d6f41b090e25447d8766114ddf68d74bd2f1;hpb=64b853aa328f34dd58e4e617cded91e2ddbcac13;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h
index 1a45d6f41b0..0f0e271f97f 100644
--- a/include/linux/firewire-cdev.h
+++ b/include/linux/firewire-cdev.h
@@ -178,6 +178,7 @@ union fw_cdev_event {
 #define FW_CDEV_IOC_QUEUE_ISO		_IOWR('#', 0x09, struct fw_cdev_queue_iso)
 #define FW_CDEV_IOC_START_ISO		_IOW('#', 0x0a, struct fw_cdev_start_iso)
 #define FW_CDEV_IOC_STOP_ISO		_IOW('#', 0x0b, struct fw_cdev_stop_iso)
+#define FW_CDEV_IOC_GET_CYCLE_TIMER	_IOR('#', 0x0c, struct fw_cdev_get_cycle_timer)
 
 /* FW_CDEV_VERSION History
  *
@@ -459,4 +460,18 @@ struct fw_cdev_stop_iso {
 	__u32 handle;
 };
 
+/**
+ * struct fw_cdev_get_cycle_timer - read cycle timer register
+ * @local_time:   system time, in microseconds since the Epoch
+ * @cycle_timer:  isochronous cycle timer, as per OHCI 1.1 clause 5.13
+ *
+ * The %FW_CDEV_IOC_GET_CYCLE_TIMER ioctl reads the isochronous cycle timer
+ * and also the system clock.  This allows to express the receive time of an
+ * isochronous packet as a system time with microsecond accuracy.
+ */
+struct fw_cdev_get_cycle_timer {
+	__u64 local_time;
+	__u32 cycle_timer;
+};
+
 #endif /* _LINUX_FIREWIRE_CDEV_H */