89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
/*
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* Video spigot capture driver.
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*
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* Copyright (c) 1995, Jim Lowe. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Version 1.2, Aug 30, 1995.
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*/
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struct spigot_info {
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unsigned long maddr;
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unsigned short irq;
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};
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/*
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* Get memory address.
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*/
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#define SPIGOT_GET_INFO _IOR('s', 4, struct spigot_info)
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/*
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* Set up a user interrupt.
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*/
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#define SPIGOT_SETINT _IOW('s', 5, int)
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/*
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* Allow/disallow access to the I/O Page.
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*/
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#define SPIGOT_IOPL_ON _IO ('s', 6)
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#define SPIGOT_IOPL_OFF _IO ('s', 7)
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#ifndef KERNEL
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/*
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* Defines for spigot library.
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*/
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unsigned short * spigot_open(char *dev);
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void spigot_close(void);
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void spigot_set_capture_size(int width, int vtof);
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unsigned char spigot_start_xfer(int num_frames);
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void spigot_stop_xfer(void);
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unsigned char spigot_status(void);
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/*
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* Define the status bits.
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*/
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#define SPIGOT_COLOR 0x01 /* Color present (No color) */
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#define SPIGOT_60HZ 0x02 /* 60 hz input signal (50hz) */
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#define SPIGOT_NO_HORIZONTAL_LOCK 0x04 /* Horizontal lock present */
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#define SPIGOT_HPLL_LOCKED 0x08 /* HPLL locked (HPLL unlocked)*/
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#define SPIGOT_VCR_MODE 0x10 /* VCR mode (TV mode) */
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#define SPIGOT_VSYNC_PRESENT 0x20 /* Vsync present */
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/*
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* spigot_open() returns a data address pointing to the spigot data.
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* Each read from this address returns the next word. The ``dev'' passed
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* is usually "/dev/spigot". Data is described in the phillips desktop
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* video data handbook under the 7191 chip. Formats may be either
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* YUV 4:2:2 or YUV 4:1:1. A sample device driver for ``nv'' is included
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* with this code.
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*
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* spigot_close() cleans up and closes the device.
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*
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* spigot_set_capture_size() will set the capture window size. Width should be
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* one of: 80, 160, 240, 320, or 640 for NTSC or
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* 96, 192, 288, 384 for PAL.
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* vtof is the Vertical top of frame offset and must be between 0 and 15 lines.
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*
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* spigot_start_xfer() will start a transfer from the 7191 to the data fifo.
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* spigot_stop_xfer() will clear the data fifo and abort any transfers.
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*
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* spigot_status() will return the above status bits.
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*/
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#endif
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