257 lines
6.3 KiB
C
257 lines
6.3 KiB
C
/*
|
|
* Video spigot capture driver.
|
|
*
|
|
* Copyright (c) 1995, Jim Lowe. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met: 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer. 2.
|
|
* Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This is the minimum driver code required to make a spigot work.
|
|
* Unfortunatly, I can't include a real driver since the information
|
|
* on the spigot is under non-disclosure. You can pick up a library
|
|
* that will work with this driver from ftp://ftp.cs.uwm.edu/pub/FreeBSD.
|
|
* The library contains the source that I can release as well as several
|
|
* object modules and functions that allows one to read spigot data.
|
|
* See the code for spigot_grab.c that is included with the library
|
|
* data.
|
|
*
|
|
* We are working with the vendor so I can release the code, please don't
|
|
* ask me for it. When/if I can release it, I will.
|
|
*
|
|
* Version 1.1, Feb 1, 1995.
|
|
*
|
|
*/
|
|
|
|
#include "spigot.h"
|
|
#if NSPIGOT > 0
|
|
|
|
#if NSPIGOT > 1
|
|
error "Can only have 1 spigot configured."
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/user.h>
|
|
#include <sys/file.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/devconf.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <machine/spigot.h>
|
|
#include <machine/psl.h>
|
|
|
|
#include <i386/isa/isa.h>
|
|
#include <i386/isa/isa_device.h>
|
|
|
|
struct spigot_softc {
|
|
int flags;
|
|
caddr_t maddr;
|
|
struct proc *p;
|
|
int signal_num;
|
|
} spigot_softc[NSPIGOT];
|
|
|
|
/* flags in softc */
|
|
#define OPEN 0x01
|
|
|
|
#define UNIT(dev) minor(dev)
|
|
|
|
int spigot_probe(struct isa_device *id);
|
|
int spigot_attach(struct isa_device *id);
|
|
|
|
struct isa_driver spigotdriver = {spigot_probe, spigot_attach, "spigot"};
|
|
|
|
static struct kern_devconf kdc_spigot[NSPIGOT] = { {
|
|
0, /* kdc_next -> filled in by dev_attach() */
|
|
0, /* kdc_rlink -> filled in by dev_attach() */
|
|
0, /* kdc_number -> filled in by dev_attach() */
|
|
"spigot", /* kdc_name */
|
|
0, /* kdc_unit */
|
|
{ /* kdc_md */
|
|
MDDT_ISA, /* mddc_devtype */
|
|
0 /* mddc_flags */
|
|
/* mddc_imask[4] */
|
|
},
|
|
isa_generic_externalize, /* kdc_externalize */
|
|
0, /* kdc_internalize */
|
|
0, /* kdc_goaway */
|
|
ISA_EXTERNALLEN, /* kdc_datalen */
|
|
&kdc_isa0, /* kdc_parent */
|
|
0, /* kdc_parentdata */
|
|
DC_UNCONFIGURED, /* kdc_state - not supported */
|
|
"Video Spigot frame grabber", /* kdc_description */
|
|
DC_CLS_MISC /* class */
|
|
} };
|
|
|
|
static inline void
|
|
spigot_registerdev(struct isa_device *id)
|
|
{
|
|
if(id->id_unit)
|
|
kdc_spigot[id->id_unit] = kdc_spigot[0];
|
|
kdc_spigot[id->id_unit].kdc_unit = id->id_unit;
|
|
kdc_spigot[id->id_unit].kdc_isa = id;
|
|
dev_attach(&kdc_spigot[id->id_unit]);
|
|
}
|
|
|
|
int
|
|
spigot_probe(struct isa_device *devp)
|
|
{
|
|
int status;
|
|
|
|
spigot_registerdev(devp);
|
|
|
|
if(devp->id_iobase != 0xad6 || inb(0xad9) == 0xff) /* ff if board isn't there??? */
|
|
status = 0;
|
|
else
|
|
status = 1;
|
|
|
|
return(status);
|
|
}
|
|
|
|
int
|
|
spigot_attach(struct isa_device *devp)
|
|
{
|
|
struct spigot_softc *ss=(struct spigot_softc *)&spigot_softc[devp->id_unit];
|
|
kdc_spigot[devp->id_unit].kdc_state = DC_UNKNOWN;
|
|
|
|
ss->flags = 0;
|
|
ss->maddr = devp->id_maddr;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
spigot_open(dev_t dev, int flag)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
|
|
|
|
if(ss->flags & OPEN)
|
|
return EBUSY;
|
|
ss->flags |= OPEN;
|
|
ss->p = 0;
|
|
ss->signal_num = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spigot_close(dev_t dev, int flag)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
|
|
ss->flags &= ~OPEN;
|
|
ss->p = 0;
|
|
ss->signal_num = 0;
|
|
|
|
outb(0xad6, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spigot_write(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
|
|
return ENXIO;
|
|
}
|
|
|
|
int
|
|
spigot_read(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
|
|
return ENXIO;
|
|
}
|
|
|
|
|
|
int
|
|
spigot_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
struct trapframe *fp;
|
|
|
|
switch(cmd){
|
|
case SPIGOT_SETINT:
|
|
ss->p = p;
|
|
ss->signal_num = *((int *)data);
|
|
break;
|
|
case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */
|
|
fp=(struct trapframe *)p->p_md.md_regs;
|
|
fp->tf_eflags |= PSL_IOPL;
|
|
break;
|
|
case SPIGOT_IOPL_OFF: /* deny access to the IO PAGE */
|
|
fp=(struct trapframe *)p->p_md.md_regs;
|
|
fp->tf_eflags &= ~PSL_IOPL;
|
|
break;
|
|
default:
|
|
printf("spigot ioctl: cmd=0x%x, '%c', num = %d, len=%d, %s\n",
|
|
cmd, IOCGROUP(cmd), cmd & 0xff, IOCPARM_LEN(cmd),
|
|
cmd&IOC_IN ? "in" : "out");
|
|
return ENOTTY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spigot_select(dev_t dev, int rw, struct proc *p)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
int s;
|
|
int r;
|
|
|
|
return ENXIO;
|
|
}
|
|
|
|
/*
|
|
* Interrupt procedure.
|
|
* Just call a user level interrupt routine.
|
|
*/
|
|
void
|
|
spigintr(int unit)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[unit];
|
|
|
|
if(ss->p && ss->signal_num)
|
|
psignal(ss->p, ss->signal_num);
|
|
}
|
|
|
|
int
|
|
spigot_mmap(dev_t dev, int offset, int nprot)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[0];
|
|
|
|
if(offset != 0)
|
|
return 0;
|
|
|
|
if(nprot & PROT_EXEC)
|
|
return 0;
|
|
|
|
return i386_btop(ss->maddr);
|
|
}
|
|
|
|
#endif /* NSPIGOT */
|