added raw1394_read_cycle_timer, contributed by Pieter Palmers
git-svn-id: svn://svn.linux1394.org/libraw1394/trunk@169 53a565d1-3bb7-0310-b661-cf11e63c67ab
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@ -1,6 +1,6 @@
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# process this file with autoconf to get a configure script
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AC_INIT(libraw1394, 1.2.1)
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AC_INIT(libraw1394, 1.3.0)
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AC_CONFIG_SRCDIR(src/raw1394.h)
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AM_CONFIG_HEADER(config.h)
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@ -16,9 +16,9 @@ AC_C_CONST
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AC_C_BIGENDIAN
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# set the libtool so version numbers
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lt_major=9
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lt_revision=1
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lt_age=1
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lt_major=10
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lt_revision=0
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lt_age=2
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AC_SUBST(lt_major)
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AC_SUBST(lt_revision)
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@ -1,5 +1,7 @@
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/* Base file for all ieee1394 ioctl's. Linux-1394 has allocated base '#'
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* with a range of 0x00-0x3f. */
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/*
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* Base file for all ieee1394 ioctl's.
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* Linux-1394 has allocated base '#' with a range of 0x00-0x3f.
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*/
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#ifndef __IEEE1394_IOCTL_H
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#define __IEEE1394_IOCTL_H
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@ -7,14 +9,6 @@
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/* AMDTP Gets 6 */
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#define AMDTP_IOC_CHANNEL _IOW('#', 0x00, struct amdtp_ioctl)
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#define AMDTP_IOC_PLUG _IOW('#', 0x01, struct amdtp_ioctl)
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#define AMDTP_IOC_PING _IOW('#', 0x02, struct amdtp_ioctl)
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#define AMDTP_IOC_ZAP _IO ('#', 0x03)
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/* DV1394 Gets 10 */
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/* Get the driver ready to transmit video. pass a struct dv1394_init* as
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@ -104,8 +98,9 @@
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_IOW ('#', 0x27, struct raw1394_iso_packets)
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#define RAW1394_IOC_ISO_XMIT_SYNC \
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_IO ('#', 0x28)
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#define RAW1394_IOC_ISO_RECV_FLUSH \
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#define RAW1394_IOC_ISO_RECV_FLUSH \
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_IO ('#', 0x29)
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#define RAW1394_IOC_GET_CYCLE_TIMER \
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_IOR ('#', 0x30, struct raw1394_cycle_timer)
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#endif /* __IEEE1394_IOCTL_H */
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14
src/iso.c
14
src/iso.c
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@ -498,6 +498,20 @@ void raw1394_iso_shutdown(raw1394handle_t handle)
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handle->iso_mode = ISO_INACTIVE;
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}
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int raw1394_read_cycle_timer(raw1394handle_t handle,
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u_int32_t *cycle_timer, u_int64_t *local_time)
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{
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int err;
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struct raw1394_cycle_timer ctr = { 0 };
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err = ioctl(handle->fd, RAW1394_IOC_GET_CYCLE_TIMER, &ctr);
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if (!err) {
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*cycle_timer = ctr.cycle_timer;
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*local_time = ctr.local_time;
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}
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return err;
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}
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static int _raw1394_iso_recv_packets(raw1394handle_t handle)
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{
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struct raw1394_iso_status *stat = &handle->iso_status;
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@ -177,4 +177,14 @@ struct raw1394_iso_status {
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__s16 xmit_cycle;
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};
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/* argument to RAW1394_IOC_GET_CYCLE_TIMER ioctl */
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struct raw1394_cycle_timer {
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/* contents of Isochronous Cycle Timer register,
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as in OHCI 1.1 clause 5.13 (also with non-OHCI hosts) */
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__u32 cycle_timer;
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/* local time in microseconds since Epoch,
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simultaneously read with cycle timer */
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__u64 local_time;
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};
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#endif /* IEEE1394_RAW1394_H */
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@ -103,7 +103,7 @@ static unsigned int init_rawdevice(struct raw1394_handle *h)
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}
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if (req.error) {
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errno = 0;
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errno = EPROTO;
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return -1;
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}
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memset(h->buffer, 0, HBUF_SIZE);
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@ -118,7 +118,6 @@ enum raw1394_modify_mode {
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RAW1394_MODIFY_FREE
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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@ -328,6 +327,25 @@ void raw1394_iso_stop(raw1394handle_t handle);
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**/
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void raw1394_iso_shutdown(raw1394handle_t handle);
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/**
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* raw1394_get_cycle_timer - get the current value of the cycle timer
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* @handle: libraw1394 handle
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* @cycle_timer: buffer for Isochronous Cycle Timer
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* @local_time: buffer for local system time in microseconds since Epoch
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*
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* Simultaneously reads the cycle timer register together with the system clock.
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*
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* Format of @cycle_timer, from MSB to LSB: 7 bits cycleSeconds (seconds, or
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* number of cycleCount rollovers), 13 bits cycleCount (isochronous cycles, or
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* cycleOffset rollovers), 12 bits cycleOffset (24.576 MHz clock ticks, not
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* provided on some hardware). The union of cycleSeconds and cycleCount is the
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* current cycle number. The nominal duration of a cycle is 125 microseconds.
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*
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* Returns: the error code of the ioctl, or 0 if successful.
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**/
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int raw1394_read_cycle_timer(raw1394handle_t handle,
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u_int32_t *cycle_timer, u_int64_t *local_time);
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typedef int raw1394_errcode_t;
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#define raw1394_make_errcode(ack, rcode) (((ack) << 16) | rcode)
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#define raw1394_internal_err(errcode) ((errcode) < 0)
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