freebsd-dev/sys/i386/isa/qcam.c
1997-09-14 03:19:42 +00:00

319 lines
7.5 KiB
C

/*
* Connectix QuickCam parallel-port camera video capture driver.
* Copyright (c) 1996, Paul Traina.
*
* This driver is based in part on work
* Copyright (c) 1996, Thomas Davis.
*
* QuickCam(TM) is a registered trademark of Connectix Inc.
* Use this driver at your own risk, it is not warranted by
* Connectix or the authors.
*
* 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
* in this position and unchanged.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
#include "qcam.h"
#if NQCAM > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /* DEVFS */
#include <machine/clock.h>
#include <machine/qcam.h>
#include <i386/isa/qcamdefs.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
/* working off of nostrategy is very ugly, but we need to determine if we're
running in a kernel that has eliminated the cdevsw table (yea!) */
#if defined(__FreeBSD__) && defined(nostrategy)
#define CDEV_MAJOR 73
#define STATIC_CDEVSW static
static d_open_t qcam_open;
static d_close_t qcam_close;
static d_read_t qcam_read;
static d_ioctl_t qcam_ioctl;
static struct cdevsw qcam_cdevsw =
{ qcam_open, qcam_close, qcam_read, nowrite,
qcam_ioctl, nostop, nullreset, nodevtotty,
seltrue, nommap, nostrategy, "qcam",
NULL, -1 };
static int qcam_probe(struct isa_device *devp);
static int qcam_attach(struct isa_device *devp);
struct isa_driver qcamdriver =
{qcam_probe, qcam_attach, "qcam"};
/*
* Initialize the dynamic cdevsw hooks.
*/
static void
qcam_drvinit (void *unused)
{
static int qcam_devsw_installed = 0;
dev_t dev;
if (!qcam_devsw_installed) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&qcam_cdevsw, NULL);
qcam_devsw_installed++;
}
}
SYSINIT(qcamdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,qcam_drvinit,NULL)
#endif /* new FreeBSD configuration system */
#ifndef STATIC_CDEVSW
#define STATIC_CDEVSW
#endif
int qcam_debug = 0;
static struct qcam_softc qcam_softc[NQCAM];
#define QC_CONF_NODETECT 0x01 /* always assume camera is present */
#define QC_CONF_FORCEUNI 0x02 /* force unidirectional transfers */
#define UNIT(dev) minor(dev)
static int
qcam_probe (struct isa_device *devp)
{
switch (devp->id_iobase) { /* don't probe weird ports */
case IO_LPT1:
case IO_LPT2:
case IO_LPT3:
break;
default:
printf("qcam%d: ignoring non-standard port 0x%x\n",
devp->id_unit, devp->id_iobase);
return 0;
}
/*
* XXX The probe code is reported to be flakey.
* We need to work on this some more, so temporarily,
* allow bit one of the "flags" parameter to bypass this
* check.
*/
if (!(devp->id_flags & QC_CONF_NODETECT))
if (!qcam_detect(devp->id_iobase))
return 0; /* failure */
return 1; /* found */
}
static int
qcam_attach (struct isa_device *devp)
{
struct qcam_softc *qs = &qcam_softc[devp->id_unit];
qs->iobase = devp->id_iobase;
qs->unit = devp->id_unit;
qs->flags |= QC_ALIVE;
/* force unidirectional parallel port mode? */
if (devp->id_flags & QC_CONF_FORCEUNI)
qs->flags |= QC_FORCEUNI;
qcam_reset(qs);
printf("qcam%d: %sdirectional parallel port\n",
qs->unit, qs->flags & QC_BIDIR_HW ? "bi" : "uni");
#ifdef DEVFS
qs->devfs_token =
devfs_add_devswf(&qcam_cdevsw, qs->unit, DV_CHR, 0, 0, 0600,
"qcam%d", qs->unit);
#endif
return 1;
}
STATIC_CDEVSW int
qcam_open (dev_t dev, int flags, int fmt, struct proc *p)
{
struct qcam_softc *qs = &qcam_softc[UNIT(dev)];
if (!(qs->flags & QC_ALIVE))
return ENXIO;
if (qs->flags & QC_OPEN)
return EBUSY;
qs->buffer_end = qs->buffer = malloc(QC_MAXFRAMEBUFSIZE, M_DEVBUF,
M_WAITOK);
if (!qs->buffer)
return ENOMEM;
qcam_reset(qs);
qcam_default(qs);
qs->init_req = 1; /* request initialization before scan */
qs->flags |= QC_OPEN;
return 0;
}
STATIC_CDEVSW int
qcam_close (dev_t dev, int flags, int fmt, struct proc *p)
{
struct qcam_softc *qs = &qcam_softc[UNIT(dev)];
if (qs->buffer) {
free(qs->buffer, M_DEVBUF);
qs->buffer = NULL;
qs->buffer_end = NULL;
}
qs->flags &= ~QC_OPEN;
return 0;
}
STATIC_CDEVSW int
qcam_read (dev_t dev, struct uio *uio, int ioflag)
{
struct qcam_softc *qs = &qcam_softc[UNIT(dev)];
int bytes, bufsize;
int error;
/* if we've seeked back to 0, that's our signal to scan */
if (uio->uio_offset == 0)
if (qcam_scan(qs))
return EIO;
bufsize = qs->buffer_end - qs->buffer;
if (uio->uio_offset > bufsize)
return EIO;
bytes = min(uio->uio_resid, (bufsize - uio->uio_offset));
error = uiomove(qs->buffer + uio->uio_offset, bytes, uio);
if (error)
return error;
return 0; /* success */
}
STATIC_CDEVSW int
qcam_ioctl (dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
{
struct qcam_softc *qs = &qcam_softc[UNIT(dev)];
struct qcam *info = (struct qcam *)data;
if (!data)
return(EINVAL);
switch (cmd) {
case QC_GET:
return qcam_ioctl_get(qs, info) ? EINVAL : 0;
case QC_SET:
return qcam_ioctl_set(qs, info) ? EINVAL : 0;
default:
return(ENOTTY);
}
return 0;
}
#ifdef QCAM_MODULE
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/lkm.h>
static struct isa_device qcam_mod_dev =
{0, &qcamdriver, IO_LPT1, 0, -1, (caddr_t) 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0};
MOD_DEV(qcam, LM_DT_CHAR, CDEV_MAJOR, &qcam_cdevsw);
static int
qcam_load (struct lkm_table *lkmtp, int cmd)
{
if (qcam_probe(&qcam_mod_dev)) {
qcam_attach(&qcam_mod_dev);
qcam_drvinit(NULL); /* XXX this shouldn't NEED to be here
* the LKM code should be doing this
* for us! */
uprintf("qcam: driver loaded\n");
return 0;
} else {
uprintf("qcam: probe failed\n");
return 1;
}
}
static int
qcam_unload (struct lkm_table *lkmtp, int cmd)
{
struct qcam_softc *qs;
int i;
for (i = 0; i < NQCAM; i++) {
qs = &qcam_softc[i];
if (qs->flags & QC_OPEN) {
uprintf("qcam%d: cannot unload, device busy", qs->unit);
return 1;
}
}
uprintf("qcam: driver unloaded\n");
return 0;
}
static int
qcam_stat (struct lkm_table *lkmtp, int cmd)
{
return 0;
}
int
qcam_mod (struct lkm_table *lkmtp, int cmd, int ver)
{
MOD_DISPATCH(qcam, lkmtp, cmd, ver,
qcam_load, qcam_unload, qcam_stat);
}
#endif /* QCAM_MODULE */
#endif /* NQCAM */