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3dc5ea9b31
This implements the simultaneous read of the isochronous cycle timer and the system clock (in usecs). This allows to express the exact receive time of an ISO packet as a system time with microsecond accuracy. http://bugzilla.kernel.org/show_bug.cgi?id=7773 The counterpart patch for libraw1394 can be found at http://thread.gmane.org/gmane.linux.kernel.firewire.devel/8934 Patch update (Stefan R.): Disable preemption and local interrupts. Prevent integer overflow. Add paranoid error checks and kerneldoc to hpsb_read_cycle_timer. Move it to other ieee1394_core high-level API functions. Change comments. Adjust whitespace. Rename struct _raw1394_cycle_timer. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Pieter Palmers <pieterp@joow.be> Acked-by: Dan Dennedy <dan@dennedy.org>
107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/*
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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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#include <linux/ioctl.h>
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#include <linux/types.h>
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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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* the parameter (see below), or NULL to get default parameters */
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#define DV1394_IOC_INIT _IOW('#', 0x06, struct dv1394_init)
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/* Stop transmitting video and free the ringbuffer */
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#define DV1394_IOC_SHUTDOWN _IO ('#', 0x07)
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/* Submit N new frames to be transmitted, where the index of the first new
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* frame is first_clear_buffer, and the index of the last new frame is
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* (first_clear_buffer + N) % n_frames */
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#define DV1394_IOC_SUBMIT_FRAMES _IO ('#', 0x08)
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/* Block until N buffers are clear (pass N as the parameter) Because we
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* re-transmit the last frame on underrun, there will at most be n_frames
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* - 1 clear frames at any time */
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#define DV1394_IOC_WAIT_FRAMES _IO ('#', 0x09)
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/* Capture new frames that have been received, where the index of the
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* first new frame is first_clear_buffer, and the index of the last new
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* frame is (first_clear_buffer + N) % n_frames */
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#define DV1394_IOC_RECEIVE_FRAMES _IO ('#', 0x0a)
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/* Tell card to start receiving DMA */
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#define DV1394_IOC_START_RECEIVE _IO ('#', 0x0b)
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/* Pass a struct dv1394_status* as the parameter */
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#define DV1394_IOC_GET_STATUS _IOR('#', 0x0c, struct dv1394_status)
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/* Video1394 Gets 10 */
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#define VIDEO1394_IOC_LISTEN_CHANNEL \
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_IOWR('#', 0x10, struct video1394_mmap)
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#define VIDEO1394_IOC_UNLISTEN_CHANNEL \
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_IOW ('#', 0x11, int)
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#define VIDEO1394_IOC_LISTEN_QUEUE_BUFFER \
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_IOW ('#', 0x12, struct video1394_wait)
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#define VIDEO1394_IOC_LISTEN_WAIT_BUFFER \
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_IOWR('#', 0x13, struct video1394_wait)
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#define VIDEO1394_IOC_TALK_CHANNEL \
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_IOWR('#', 0x14, struct video1394_mmap)
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#define VIDEO1394_IOC_UNTALK_CHANNEL \
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_IOW ('#', 0x15, int)
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/*
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* This one is broken: it really wanted
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* "sizeof (struct video1394_wait) + sizeof (struct video1394_queue_variable)"
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* but got just a "size_t"
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*/
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#define VIDEO1394_IOC_TALK_QUEUE_BUFFER \
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_IOW ('#', 0x16, size_t)
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#define VIDEO1394_IOC_TALK_WAIT_BUFFER \
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_IOW ('#', 0x17, struct video1394_wait)
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#define VIDEO1394_IOC_LISTEN_POLL_BUFFER \
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_IOWR('#', 0x18, struct video1394_wait)
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/* Raw1394's ISO interface */
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#define RAW1394_IOC_ISO_XMIT_INIT \
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_IOW ('#', 0x1a, struct raw1394_iso_status)
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#define RAW1394_IOC_ISO_RECV_INIT \
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_IOWR('#', 0x1b, struct raw1394_iso_status)
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#define RAW1394_IOC_ISO_RECV_START \
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_IOC (_IOC_WRITE, '#', 0x1c, sizeof(int) * 3)
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#define RAW1394_IOC_ISO_XMIT_START \
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_IOC (_IOC_WRITE, '#', 0x1d, sizeof(int) * 2)
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#define RAW1394_IOC_ISO_XMIT_RECV_STOP \
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_IO ('#', 0x1e)
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#define RAW1394_IOC_ISO_GET_STATUS \
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_IOR ('#', 0x1f, struct raw1394_iso_status)
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#define RAW1394_IOC_ISO_SHUTDOWN \
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_IO ('#', 0x20)
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#define RAW1394_IOC_ISO_QUEUE_ACTIVITY \
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_IO ('#', 0x21)
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#define RAW1394_IOC_ISO_RECV_LISTEN_CHANNEL \
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_IOW ('#', 0x22, unsigned char)
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#define RAW1394_IOC_ISO_RECV_UNLISTEN_CHANNEL \
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_IOW ('#', 0x23, unsigned char)
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#define RAW1394_IOC_ISO_RECV_SET_CHANNEL_MASK \
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_IOW ('#', 0x24, __u64)
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#define RAW1394_IOC_ISO_RECV_PACKETS \
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_IOW ('#', 0x25, struct raw1394_iso_packets)
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#define RAW1394_IOC_ISO_RECV_RELEASE_PACKETS \
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_IOW ('#', 0x26, unsigned int)
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#define RAW1394_IOC_ISO_XMIT_PACKETS \
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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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_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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