7627292939
- split driver into FreeBSD specific and camera specific portions (qcamio.c can run in user mode, with a Linux "driver top" etc, and qcam.c should be trivial to port to NetBSD and BSDI.) - support for 4bppand bidirectional transfers working better - start of interleaved data-transfers byte-stream decodes (some of this stuff has been pulled out for the moment to make it easier to debug) At this point, anyone who wants to port it to other platforms should feel free to do so. Please feed changes directly back to me so that I can produce a unified distribution.
337 lines
8.6 KiB
C
337 lines
8.6 KiB
C
/*
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* FreeBSD Connectix QuickCam parallel-port camera video capture driver.
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* Copyright (c) 1996, Paul Traina.
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*
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* This driver is based in part on the Linux QuickCam driver which is
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* Copyright (c) 1996, Thomas Davis.
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*
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* Additional ideas from code written by Michael Chinn.
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*
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* QuickCam(TM) is a registered trademark of Connectix Inc.
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* Use this driver at your own risk, it is not warranted by
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* Connectix or the authors.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "qcam.h"
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#if NQCAM > 0
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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/conf.h>
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#include <sys/ioctl.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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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /* DEVFS */
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#include <machine/cpu.h>
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#include <machine/clock.h>
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#include <machine/qcam.h>
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#include <i386/isa/qcamreg.h>
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#include <i386/isa/qcamdefs.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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int qcam_debug = 1;
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static struct qcam_softc qcam_softc[NQCAM];
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#define QC_CONF_NODETECT 0x01 /* always assume camera is present */
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#define QC_CONF_FORCEUNI 0x02 /* force unidirectional transfers */
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static struct kern_devconf kdc_qcam_template = {
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0, 0, 0, /* filled in by dev_attach() */
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"qcam", /* 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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"tty" /* 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_UNCONFIGURED, /* kdc_state */
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"QuickCam video input", /* kdc_description */
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DC_CLS_MISC /* class */
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};
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#define UNIT(dev) minor(dev)
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static int qcam_probe(struct isa_device *id);
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static int qcam_attach(struct isa_device *id);
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struct isa_driver qcamdriver =
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{qcam_probe, qcam_attach, "qcam"};
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static d_open_t qcam_open;
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static d_close_t qcam_close;
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static d_read_t qcam_read;
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static d_ioctl_t qcam_ioctl;
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#define CDEV_MAJOR 73
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static struct cdevsw qcam_cdevsw =
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{ qcam_open, qcam_close, qcam_read, nowrite,
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qcam_ioctl, nostop, nullreset, nodevtotty,
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noselect, nommap, nostrategy, "qcam",
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NULL, -1 };
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static void
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qcam_registerdev (struct isa_device *id)
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{
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struct kern_devconf *kdc = &qcam_softc[id->id_unit].kdc;
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*kdc = kdc_qcam_template; /* byte-copy template */
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kdc->kdc_unit = id->id_unit;
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kdc->kdc_parentdata = id;
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dev_attach(kdc);
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}
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static int
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qcam_probe (struct isa_device *devp)
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{
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u_char reg, last;
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int i, transitions = 0;
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switch (devp->id_iobase) { /* don't probe weird ports */
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case IO_LPT1:
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case IO_LPT2:
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case IO_LPT3:
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break;
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default:
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printf("qcam%d: ignoring non-standard port 0x%x\n",
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devp->id_unit, devp->id_iobase);
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return 0;
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}
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/*
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* XXX The probe code is reported to be flakey.
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* We need to work on this some more, so temporarily,
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* allow bit one of the "flags" parameter to bypass this
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* check.
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*/
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if (!(devp->id_flags & QC_CONF_NODETECT))
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if (!qcam_detect(devp->id_iobase))
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return 0; /* failure */
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qcam_registerdev(devp);
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return 1; /* found */
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}
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static int
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qcam_attach (struct isa_device *devp)
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{
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struct qcam_softc *qs = &qcam_softc[devp->id_unit];
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qs->iobase = devp->id_iobase;
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qs->unit = devp->id_unit;
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qs->kdc.kdc_state = DC_IDLE;
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qs->flags |= QC_ALIVE;
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/* force unidirectional parallel port mode? */
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if (devp->id_flags & QC_CONF_FORCEUNI)
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qs->flags |= QC_FORCEUNI;
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qcam_reset(qs);
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printf("qcam%d: %sdirectional parallel port\n",
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qs->unit, qs->flags & QC_BIDIR_HW ? "bi" : "uni");
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#ifdef DEVFS
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{
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char name[32];
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sprintf(name,"qcam%d", qs->unit);
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qs->devfs_token = devfs_add_devsw("/", name, &qcam_cdevsw, qs->unit,
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DV_CHR, 0, 0, 0600);
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}
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#endif
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return 1;
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}
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static int
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qcam_open (dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct qcam_softc *qs = (struct qcam_softc *)&qcam_softc[UNIT(dev)];
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if (!(qs->flags & QC_ALIVE))
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return ENXIO;
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if (qs->flags & QC_OPEN)
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return EBUSY;
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qs->buffer_end = qs->buffer = malloc(QC_MAXFRAMEBUFSIZE, M_DEVBUF,
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M_NOWAIT);
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if (!qs->buffer)
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return ENOMEM;
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qcam_reset(qs);
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qcam_default(qs);
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qs->init_req = 1; /* request initialization before scan */
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qs->flags |= QC_OPEN;
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qs->kdc.kdc_state = DC_BUSY;
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return 0;
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}
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static int
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qcam_close (dev_t dev, int flags, int fmt, struct proc *p)
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{
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struct qcam_softc *qs = (struct qcam_softc *)&qcam_softc[UNIT(dev)];
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if (qs->buffer) {
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free(qs->buffer, M_DEVBUF);
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qs->buffer = NULL;
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qs->buffer_end = NULL;
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}
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qs->flags &= ~QC_OPEN;
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qs->kdc.kdc_state = DC_IDLE;
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return 0;
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}
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static int
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qcam_read (dev_t dev, struct uio *uio, int ioflag)
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{
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struct qcam_softc *qs = (struct qcam_softc *)&qcam_softc[UNIT(dev)];
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int bytes, bufsize;
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int error;
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/* if we've seeked back to 0, that's our signal to scan */
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if (uio->uio_offset == 0)
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if (qcam_scan(qs))
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return EIO;
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bufsize = qs->buffer_end - qs->buffer;
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if (uio->uio_offset > bufsize)
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return EIO;
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bytes = min(uio->uio_resid, (bufsize - uio->uio_offset));
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error = uiomove(qs->buffer + uio->uio_offset, bytes, uio);
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if (error)
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return error;
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return 0; /* success */
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}
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static int
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qcam_ioctl (dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
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{
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struct qcam_softc *qs = (struct qcam_softc *)&qcam_softc[UNIT(dev)];
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struct qcam *info = (struct qcam *)data;
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if (!data)
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return(EINVAL);
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switch (cmd) {
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case QC_GET:
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info->qc_version = QC_IOCTL_VERSION;
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info->qc_xsize = qs->x_size;
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info->qc_ysize = qs->y_size;
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info->qc_xorigin = qs->x_origin;
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info->qc_yorigin = qs->y_origin;
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info->qc_bpp = qs->bpp;
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info->qc_zoom = qs->zoom;
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info->qc_brightness = qs->brightness;
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info->qc_whitebalance = qs->whitebalance;
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info->qc_contrast = qs->contrast;
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break;
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case QC_SET:
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/*
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* sanity check parameters passed in by user
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* we're extra paranoid right now because the API
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* is in flux
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*/
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if (info->qc_xsize > QC_MAX_XSIZE ||
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info->qc_ysize > QC_MAX_YSIZE ||
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info->qc_xorigin > QC_MAX_XSIZE ||
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info->qc_yorigin > QC_MAX_YSIZE ||
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(info->qc_bpp != 4 && info->qc_bpp != 6) ||
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info->qc_zoom > QC_ZOOM_200 ||
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info->qc_brightness > UCHAR_MAX ||
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info->qc_whitebalance > UCHAR_MAX ||
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info->qc_contrast > UCHAR_MAX)
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return EINVAL;
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/* version check */
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if (info->qc_version != QC_IOCTL_VERSION)
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return EINVAL;
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qs->x_size = info->qc_xsize;
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qs->y_size = info->qc_ysize;
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qs->x_origin = info->qc_xorigin;
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qs->y_origin = info->qc_yorigin;
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qs->bpp = info->qc_bpp;
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qs->zoom = info->qc_zoom;
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qs->brightness = info->qc_brightness;
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qs->whitebalance = info->qc_whitebalance;
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qs->contrast = info->qc_contrast;
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/* request initialization before next scan pass */
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qs->init_req = 1;
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break;
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default:
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return ENOTTY;
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}
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return 0;
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}
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/*
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* Initialize the dynamic cdevsw hooks.
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*/
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static void
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qcam_drvinit (void *unused)
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{
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static int qcam_devsw_installed = 0;
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dev_t dev;
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if (!qcam_devsw_installed) {
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dev = makedev(CDEV_MAJOR, 0);
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cdevsw_add(&dev,&qcam_cdevsw, NULL);
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qcam_devsw_installed++;
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}
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}
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SYSINIT(qcamdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,qcam_drvinit,NULL)
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#endif /* NQCAM */
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