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255 lines
6.2 KiB
C
255 lines
6.2 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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* This is the minimum driver code required to make a spigot work.
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* Unfortunatly, I can't include a real driver since the information
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* on the spigot is under non-disclosure. You can pick up a library
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* that will work with this driver from ftp://ftp.cs.uwm.edu/pub/FreeBSD.
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* The library contains the source that I can release as well as several
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* object modules and functions that allows one to read spigot data.
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* See the code for spigot_grab.c that is included with the library
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* data.
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*
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* We are working with the vendor so I can release the code, please don't
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* ask me for it. When/if I can release it, I will.
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*
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* Version 1.1, Feb 1, 1995.
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*
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*/
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#include "spigot.h"
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#if NSPIGOT > 0
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#if NSPIGOT > 1
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error "Can only have 1 spigot configured."
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/devconf.h>
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#include <sys/errno.h>
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#include <sys/mman.h>
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#include <machine/spigot.h>
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#include <machine/psl.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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struct spigot_softc {
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int flags;
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caddr_t maddr;
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struct proc *p;
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int signal_num;
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} spigot_softc[NSPIGOT];
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/* flags in softc */
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#define OPEN 0x01
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#define UNIT(dev) minor(dev)
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int spigot_probe(struct isa_device *id);
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int spigot_attach(struct isa_device *id);
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struct isa_driver spigotdriver = {spigot_probe, spigot_attach, "spigot"};
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static struct kern_devconf kdc_spigot[NSPIGOT] = {
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0, /* kdc_next -> filled in by dev_attach() */
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0, /* kdc_rlink -> filled in by dev_attach() */
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0, /* kdc_number -> filled in by dev_attach() */
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"spigot", /* kdc_name */
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0, /* kdc_unit */
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{ /* kdc_md */
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MDDT_ISA, /* mddc_devtype */
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0 /* mddc_flags */
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/* mddc_imask[4] */
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},
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isa_generic_externalize, /* kdc_externalize */
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0, /* kdc_internalize */
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0, /* kdc_goaway */
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ISA_EXTERNALLEN, /* kdc_datalen */
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&kdc_isa0, /* kdc_parent */
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0, /* kdc_parentdata */
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DC_UNKNOWN, /* kdc_state - not supported */
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"Video Spigot frame grabber" /* kdc_description */
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};
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static inline void
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spigot_registerdev(struct isa_device *id)
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{
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if(id->id_unit)
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kdc_spigot[id->id_unit] = kdc_spigot[0];
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kdc_spigot[id->id_unit].kdc_unit = id->id_unit;
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kdc_spigot[id->id_unit].kdc_isa = id;
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dev_attach(&kdc_spigot[id->id_unit]);
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}
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int
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spigot_probe(struct isa_device *devp)
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{
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int status;
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if(inb(0xad9) == 0xff) /* ff if board isn't there??? */
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status = 0;
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else
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status = 1;
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return(status);
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}
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int
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spigot_attach(struct isa_device *devp)
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{
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struct spigot_softc *ss=(struct spigot_softc *)&spigot_softc[devp->id_unit];
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ss->flags = 0;
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ss->maddr = devp->id_maddr;
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spigot_registerdev(devp);
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return 1;
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}
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int
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spigot_open(dev_t dev, int flag)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
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if(ss->flags & OPEN)
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return EBUSY;
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ss->flags |= OPEN;
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ss->p = 0;
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ss->signal_num = 0;
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return 0;
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}
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int
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spigot_close(dev_t dev, int flag)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
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ss->flags &= ~OPEN;
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ss->p = 0;
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ss->signal_num = 0;
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outb(0xad6, 0);
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return 0;
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}
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int
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spigot_write(dev_t dev, struct uio *uio, int ioflag)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
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return ENXIO;
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}
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int
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spigot_read(dev_t dev, struct uio *uio, int ioflag)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
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return ENXIO;
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}
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int
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spigot_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
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struct trapframe *fp;
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switch(cmd){
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case SPIGOT_SETINT:
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ss->p = p;
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ss->signal_num = *((int *)data);
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break;
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case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */
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fp=(struct trapframe *)p->p_md.md_regs;
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fp->tf_eflags |= PSL_IOPL;
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break;
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case SPIGOT_IOPL_OFF: /* deny access to the IO PAGE */
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fp=(struct trapframe *)p->p_md.md_regs;
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fp->tf_eflags &= ~PSL_IOPL;
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break;
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default:
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printf("spigot ioctl: cmd=0x%x, '%c', num = %d, len=%d, %s\n",
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cmd, IOCGROUP(cmd), cmd & 0xff, IOCPARM_LEN(cmd),
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cmd&IOC_IN ? "in" : "out");
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return ENOTTY;
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}
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return 0;
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}
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int
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spigot_select(dev_t dev, int rw, struct proc *p)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
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int s;
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int r;
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return ENXIO;
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}
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/*
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* Interrupt procedure.
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* Just call a user level interrupt routine.
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*/
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void
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spigintr(int unit)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[unit];
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if(ss->p && ss->signal_num)
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psignal(ss->p, ss->signal_num);
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}
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int
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spigot_mmap(dev_t dev, int offset, int nprot)
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{
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struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[0];
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if(offset != 0)
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return 0;
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if(nprot & PROT_EXEC)
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return 0;
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return i386_btop(ss->maddr);
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}
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#endif /* NSPIGOT */
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