289 lines
6.8 KiB
C
289 lines
6.8 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.
|
|
*
|
|
* The vendor will not allow me to release the spigot library code.
|
|
* Please don't ask me for it.
|
|
*
|
|
* To use this driver you will need the spigot library. The library is
|
|
* available from:
|
|
*
|
|
* ftp.cs.uwm.edu://pub/FreeBSD/spigot/spigot.tar.gz
|
|
*
|
|
* Version 1.7, December 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/conf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/mman.h>
|
|
#ifdef DEVFS
|
|
#include <sys/devfsext.h>
|
|
#endif /* DEVFS */
|
|
|
|
#include <machine/frame.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/spigot.h>
|
|
#include <machine/psl.h>
|
|
|
|
#include <i386/isa/isa_device.h>
|
|
|
|
static struct spigot_softc {
|
|
u_long flags;
|
|
u_long maddr;
|
|
struct proc *p;
|
|
u_long signal_num;
|
|
u_short irq;
|
|
#ifdef DEVFS
|
|
void *devfs_token;
|
|
#endif
|
|
} spigot_softc[NSPIGOT];
|
|
|
|
/* flags in softc */
|
|
#define OPEN 0x01
|
|
#define ALIVE 0x02
|
|
|
|
#define UNIT(dev) minor(dev)
|
|
|
|
static int spigot_probe(struct isa_device *id);
|
|
static int spigot_attach(struct isa_device *id);
|
|
|
|
struct isa_driver spigotdriver = {spigot_probe, spigot_attach, "spigot"};
|
|
|
|
static d_open_t spigot_open;
|
|
static d_close_t spigot_close;
|
|
static d_read_t spigot_read;
|
|
static d_write_t spigot_write;
|
|
static d_ioctl_t spigot_ioctl;
|
|
static d_mmap_t spigot_mmap;
|
|
|
|
#define CDEV_MAJOR 11
|
|
static struct cdevsw spigot_cdevsw =
|
|
{ spigot_open, spigot_close, spigot_read, spigot_write, /*11*/
|
|
spigot_ioctl, nostop, nullreset, nodevtotty,/* Spigot */
|
|
seltrue, spigot_mmap, NULL, "spigot", NULL, -1 };
|
|
|
|
static int
|
|
spigot_probe(struct isa_device *devp)
|
|
{
|
|
int status;
|
|
struct spigot_softc *ss=(struct spigot_softc *)&spigot_softc[devp->id_unit];
|
|
|
|
ss->flags = 0;
|
|
ss->maddr = 0;
|
|
ss->irq = 0;
|
|
|
|
if(devp->id_iobase != 0xad6 || inb(0xad9) == 0xff)
|
|
status = 0; /* not found */
|
|
else {
|
|
status = 1; /* found */
|
|
ss->flags |= ALIVE;
|
|
}
|
|
|
|
return(status);
|
|
}
|
|
|
|
static int
|
|
spigot_attach(struct isa_device *devp)
|
|
{
|
|
int unit;
|
|
struct spigot_softc *ss= &spigot_softc[unit = devp->id_unit];
|
|
|
|
ss->maddr = kvtop(devp->id_maddr);
|
|
ss->irq = devp->id_irq;
|
|
#ifdef DEVFS
|
|
ss->devfs_token =
|
|
devfs_add_devswf(&spigot_cdevsw, unit, DV_CHR, 0, 0, 0644,
|
|
"spigot%d", unit);
|
|
#endif
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
spigot_open(dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
int error;
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
|
|
if((ss->flags & ALIVE) == 0)
|
|
return ENXIO;
|
|
|
|
if(ss->flags & OPEN)
|
|
return EBUSY;
|
|
|
|
#if !defined(SPIGOT_UNSECURE)
|
|
/*
|
|
* Don't allow open() unless the process has sufficient privileges,
|
|
* since mapping the i/o page and granting i/o privilege would
|
|
* require sufficient privilege soon and nothing much can be done
|
|
* without them.
|
|
*/
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error != 0)
|
|
return error;
|
|
if (securelevel > 0)
|
|
return EPERM;
|
|
#endif
|
|
|
|
ss->flags |= OPEN;
|
|
ss->p = 0;
|
|
ss->signal_num = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
spigot_close(dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int
|
|
spigot_write(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
return ENXIO;
|
|
}
|
|
|
|
static int
|
|
spigot_read(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
return ENXIO;
|
|
}
|
|
|
|
|
|
static int
|
|
spigot_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
int error;
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
|
|
struct spigot_info *info;
|
|
|
|
if(!data) return(EINVAL);
|
|
switch(cmd){
|
|
case SPIGOT_SETINT:
|
|
ss->p = p;
|
|
ss->signal_num = *((int *)data);
|
|
break;
|
|
case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */
|
|
#if !defined(SPIGOT_UNSECURE)
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error != 0)
|
|
return error;
|
|
if (securelevel > 0)
|
|
return EPERM;
|
|
#endif
|
|
p->p_md.md_regs->tf_eflags |= PSL_IOPL;
|
|
break;
|
|
case SPIGOT_IOPL_OFF: /* deny access to the IO PAGE */
|
|
p->p_md.md_regs->tf_eflags &= ~PSL_IOPL;
|
|
break;
|
|
case SPIGOT_GET_INFO:
|
|
info = (struct spigot_info *)data;
|
|
info->maddr = ss->maddr;
|
|
info->irq = ss->irq;
|
|
break;
|
|
default:
|
|
return ENOTTY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
static int
|
|
spigot_mmap(dev_t dev, int offset, int nprot)
|
|
{
|
|
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[0];
|
|
|
|
if(offset != 0) {
|
|
printf("spigot mmap failed, offset = 0x%x != 0x0\n", offset);
|
|
return -1;
|
|
}
|
|
|
|
if(nprot & PROT_EXEC)
|
|
return -1;
|
|
|
|
return i386_btop(ss->maddr);
|
|
}
|
|
|
|
|
|
static spigot_devsw_installed = 0;
|
|
|
|
static void spigot_drvinit(void *unused)
|
|
{
|
|
dev_t dev;
|
|
|
|
if( ! spigot_devsw_installed ) {
|
|
dev = makedev(CDEV_MAJOR, 0);
|
|
cdevsw_add(&dev,&spigot_cdevsw, NULL);
|
|
spigot_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
SYSINIT(spigotdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,spigot_drvinit,NULL)
|
|
|
|
|
|
#endif /* NSPIGOT */
|