c-qcam.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:19k
- /*
- * Video4Linux Colour QuickCam driver
- * Copyright 1997-2000 Philip Blundell <philb@gnu.org>
- *
- * Module parameters:
- *
- * parport=auto -- probe all parports (default)
- * parport=0 -- parport0 becomes qcam1
- * parport=2,0,1 -- parports 2,0,1 are tried in that order
- *
- * probe=0 -- do no probing, assume camera is present
- * probe=1 -- use IEEE-1284 autoprobe data only (default)
- * probe=2 -- probe aggressively for cameras
- *
- * force_rgb=1 -- force data format to RGB (default is BGR)
- *
- * The parport parameter controls which parports will be scanned.
- * Scanning all parports causes some printers to print a garbage page.
- * -- March 14, 1999 Billy Donahue <billy@escape.com>
- *
- * Fixed data format to BGR, added force_rgb parameter. Added missing
- * parport_unregister_driver() on module removal.
- * -- May 28, 2000 Claudio Matsuoka <claudio@conectiva.com>
- */
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/fs.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/mm.h>
- #include <linux/parport.h>
- #include <linux/sched.h>
- #include <linux/version.h>
- #include <linux/videodev.h>
- #include <asm/semaphore.h>
- #include <asm/uaccess.h>
- struct qcam_device {
- struct video_device vdev;
- struct pardevice *pdev;
- struct parport *pport;
- int width, height;
- int ccd_width, ccd_height;
- int mode;
- int contrast, brightness, whitebal;
- int top, left;
- unsigned int bidirectional;
- struct semaphore lock;
- };
- /* cameras maximum */
- #define MAX_CAMS 4
- /* The three possible QuickCam modes */
- #define QC_MILLIONS 0x18
- #define QC_BILLIONS 0x10
- #define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */
- /* The three possible decimations */
- #define QC_DECIMATION_1 0
- #define QC_DECIMATION_2 2
- #define QC_DECIMATION_4 4
- #define BANNER "Colour QuickCam for Video4Linux v0.05"
- static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 };
- static int probe = 2;
- static int force_rgb = 0;
- static int video_nr = -1;
- static inline void qcam_set_ack(struct qcam_device *qcam, unsigned int i)
- {
- /* note: the QC specs refer to the PCAck pin by voltage, not
- software level. PC ports have builtin inverters. */
- parport_frob_control(qcam->pport, 8, i?8:0);
- }
- static inline unsigned int qcam_ready1(struct qcam_device *qcam)
- {
- return (parport_read_status(qcam->pport) & 0x8)?1:0;
- }
- static inline unsigned int qcam_ready2(struct qcam_device *qcam)
- {
- return (parport_read_data(qcam->pport) & 0x1)?1:0;
- }
- static unsigned int qcam_await_ready1(struct qcam_device *qcam,
- int value)
- {
- unsigned long oldjiffies = jiffies;
- unsigned int i;
- for (oldjiffies = jiffies; (jiffies - oldjiffies) < (HZ/25); )
- if (qcam_ready1(qcam) == value)
- return 0;
- /* If the camera didn't respond within 1/25 second, poll slowly
- for a while. */
- for (i = 0; i < 50; i++)
- {
- if (qcam_ready1(qcam) == value)
- return 0;
- current->state=TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/10);
- }
- /* Probably somebody pulled the plug out. Not much we can do. */
- printk(KERN_ERR "c-qcam: ready1 timeout (%d) %x %xn", value,
- parport_read_status(qcam->pport),
- parport_read_control(qcam->pport));
- return 1;
- }
- static unsigned int qcam_await_ready2(struct qcam_device *qcam, int value)
- {
- unsigned long oldjiffies = jiffies;
- unsigned int i;
- for (oldjiffies = jiffies; (jiffies - oldjiffies) < (HZ/25); )
- if (qcam_ready2(qcam) == value)
- return 0;
- /* If the camera didn't respond within 1/25 second, poll slowly
- for a while. */
- for (i = 0; i < 50; i++)
- {
- if (qcam_ready2(qcam) == value)
- return 0;
- current->state=TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/10);
- }
- /* Probably somebody pulled the plug out. Not much we can do. */
- printk(KERN_ERR "c-qcam: ready2 timeout (%d) %x %x %xn", value,
- parport_read_status(qcam->pport),
- parport_read_control(qcam->pport),
- parport_read_data(qcam->pport));
- return 1;
- }
- static int qcam_read_data(struct qcam_device *qcam)
- {
- unsigned int idata;
- qcam_set_ack(qcam, 0);
- if (qcam_await_ready1(qcam, 1)) return -1;
- idata = parport_read_status(qcam->pport) & 0xf0;
- qcam_set_ack(qcam, 1);
- if (qcam_await_ready1(qcam, 0)) return -1;
- idata |= (parport_read_status(qcam->pport) >> 4);
- return idata;
- }
- static int qcam_write_data(struct qcam_device *qcam, unsigned int data)
- {
- unsigned int idata;
- parport_write_data(qcam->pport, data);
- idata = qcam_read_data(qcam);
- if (data != idata)
- {
- printk(KERN_WARNING "cqcam: sent %x but received %xn", data,
- idata);
- return 1;
- }
- return 0;
- }
- static inline int qcam_set(struct qcam_device *qcam, unsigned int cmd, unsigned int data)
- {
- if (qcam_write_data(qcam, cmd))
- return -1;
- if (qcam_write_data(qcam, data))
- return -1;
- return 0;
- }
- static inline int qcam_get(struct qcam_device *qcam, unsigned int cmd)
- {
- if (qcam_write_data(qcam, cmd))
- return -1;
- return qcam_read_data(qcam);
- }
- static int qc_detect(struct qcam_device *qcam)
- {
- unsigned int stat, ostat, i, count = 0;
- /* The probe routine below is not very reliable. The IEEE-1284
- probe takes precedence. */
- /* XXX Currently parport provides no way to distinguish between
- "the IEEE probe was not done" and "the probe was done, but
- no device was found". Fix this one day. */
- if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA
- && qcam->pport->probe_info[0].model
- && !strcmp(qcam->pdev->port->probe_info[0].model,
- "Color QuickCam 2.0")) {
- printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.n");
- return 1;
- }
-
- if (probe < 2)
- return 0;
- parport_write_control(qcam->pport, 0xc);
- /* look for a heartbeat */
- ostat = stat = parport_read_status(qcam->pport);
- for (i=0; i<250; i++)
- {
- mdelay(1);
- stat = parport_read_status(qcam->pport);
- if (ostat != stat)
- {
- if (++count >= 3) return 1;
- ostat = stat;
- }
- }
- /* Reset the camera and try again */
- parport_write_control(qcam->pport, 0xc);
- parport_write_control(qcam->pport, 0x8);
- mdelay(1);
- parport_write_control(qcam->pport, 0xc);
- mdelay(1);
- count = 0;
- ostat = stat = parport_read_status(qcam->pport);
- for (i=0; i<250; i++)
- {
- mdelay(1);
- stat = parport_read_status(qcam->pport);
- if (ostat != stat)
- {
- if (++count >= 3) return 1;
- ostat = stat;
- }
- }
- /* no (or flatline) camera, give up */
- return 0;
- }
- static void qc_reset(struct qcam_device *qcam)
- {
- parport_write_control(qcam->pport, 0xc);
- parport_write_control(qcam->pport, 0x8);
- mdelay(1);
- parport_write_control(qcam->pport, 0xc);
- mdelay(1);
- }
- /* Reset the QuickCam and program for brightness, contrast,
- * white-balance, and resolution. */
- static void qc_setup(struct qcam_device *q)
- {
- qc_reset(q);
- /* Set the brightness. */
- qcam_set(q, 11, q->brightness);
- /* Set the height and width. These refer to the actual
- CCD area *before* applying the selected decimation. */
- qcam_set(q, 17, q->ccd_height);
- qcam_set(q, 19, q->ccd_width / 2);
- /* Set top and left. */
- qcam_set(q, 0xd, q->top);
- qcam_set(q, 0xf, q->left);
- /* Set contrast and white balance. */
- qcam_set(q, 0x19, q->contrast);
- qcam_set(q, 0x1f, q->whitebal);
-
- /* Set the speed. */
- qcam_set(q, 45, 2);
- }
- /* Read some bytes from the camera and put them in the buffer.
- nbytes should be a multiple of 3, because bidirectional mode gives
- us three bytes at a time. */
- static unsigned int qcam_read_bytes(struct qcam_device *q, unsigned char *buf, unsigned int nbytes)
- {
- unsigned int bytes = 0;
- qcam_set_ack(q, 0);
- if (q->bidirectional)
- {
- /* It's a bidirectional port */
- while (bytes < nbytes)
- {
- unsigned int lo1, hi1, lo2, hi2;
- unsigned char r, g, b;
- if (qcam_await_ready2(q, 1)) return bytes;
- lo1 = parport_read_data(q->pport) >> 1;
- hi1 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10;
- qcam_set_ack(q, 1);
- if (qcam_await_ready2(q, 0)) return bytes;
- lo2 = parport_read_data(q->pport) >> 1;
- hi2 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10;
- qcam_set_ack(q, 0);
- r = (lo1 | ((hi1 & 1)<<7));
- g = ((hi1 & 0x1e)<<3) | ((hi2 & 0x1e)>>1);
- b = (lo2 | ((hi2 & 1)<<7));
- if (force_rgb) {
- buf[bytes++] = r;
- buf[bytes++] = g;
- buf[bytes++] = b;
- } else {
- buf[bytes++] = b;
- buf[bytes++] = g;
- buf[bytes++] = r;
- }
- }
- }
- else
- {
- /* It's a unidirectional port */
- int i = 0, n = bytes;
- unsigned char rgb[3];
- while (bytes < nbytes)
- {
- unsigned int hi, lo;
- if (qcam_await_ready1(q, 1)) return bytes;
- hi = (parport_read_status(q->pport) & 0xf0);
- qcam_set_ack(q, 1);
- if (qcam_await_ready1(q, 0)) return bytes;
- lo = (parport_read_status(q->pport) & 0xf0);
- qcam_set_ack(q, 0);
- /* flip some bits */
- rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88;
- if (i >= 2) {
- get_fragment:
- if (force_rgb) {
- buf[n++] = rgb[0];
- buf[n++] = rgb[1];
- buf[n++] = rgb[2];
- } else {
- buf[n++] = rgb[2];
- buf[n++] = rgb[1];
- buf[n++] = rgb[0];
- }
- }
- }
- if (i) {
- i = 0;
- goto get_fragment;
- }
- }
- return bytes;
- }
- #define BUFSZ 150
- static long qc_capture(struct qcam_device *q, char *buf, unsigned long len)
- {
- unsigned lines, pixelsperline, bitsperxfer;
- unsigned int is_bi_dir = q->bidirectional;
- size_t wantlen, outptr = 0;
- char tmpbuf[BUFSZ];
- if (verify_area(VERIFY_WRITE, buf, len))
- return -EFAULT;
- /* Wait for camera to become ready */
- for (;;)
- {
- int i = qcam_get(q, 41);
- if (i == -1) {
- qc_setup(q);
- return -EIO;
- }
- if ((i & 0x80) == 0)
- break;
- else
- schedule();
- }
- if (qcam_set(q, 7, (q->mode | (is_bi_dir?1:0)) + 1))
- return -EIO;
-
- lines = q->height;
- pixelsperline = q->width;
- bitsperxfer = (is_bi_dir) ? 24 : 8;
- if (is_bi_dir)
- {
- /* Turn the port around */
- parport_data_reverse(q->pport);
- mdelay(3);
- qcam_set_ack(q, 0);
- if (qcam_await_ready1(q, 1)) {
- qc_setup(q);
- return -EIO;
- }
- qcam_set_ack(q, 1);
- if (qcam_await_ready1(q, 0)) {
- qc_setup(q);
- return -EIO;
- }
- }
- wantlen = lines * pixelsperline * 24 / 8;
- while (wantlen)
- {
- size_t t, s;
- s = (wantlen > BUFSZ)?BUFSZ:wantlen;
- t = qcam_read_bytes(q, tmpbuf, s);
- if (outptr < len)
- {
- size_t sz = len - outptr;
- if (sz > t) sz = t;
- if (__copy_to_user(buf+outptr, tmpbuf, sz))
- break;
- outptr += sz;
- }
- wantlen -= t;
- if (t < s)
- break;
- if (current->need_resched)
- schedule();
- }
- len = outptr;
- if (wantlen)
- {
- printk("qcam: short read.n");
- if (is_bi_dir)
- parport_data_forward(q->pport);
- qc_setup(q);
- return len;
- }
- if (is_bi_dir)
- {
- int l;
- do {
- l = qcam_read_bytes(q, tmpbuf, 3);
- if (current->need_resched)
- schedule();
- } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e));
- if (force_rgb) {
- if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
- printk("qcam: bad EOFn");
- } else {
- if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
- printk("qcam: bad EOFn");
- }
- qcam_set_ack(q, 0);
- if (qcam_await_ready1(q, 1))
- {
- printk("qcam: no ack after EOFn");
- parport_data_forward(q->pport);
- qc_setup(q);
- return len;
- }
- parport_data_forward(q->pport);
- mdelay(3);
- qcam_set_ack(q, 1);
- if (qcam_await_ready1(q, 0))
- {
- printk("qcam: no ack to port turnaroundn");
- qc_setup(q);
- return len;
- }
- }
- else
- {
- int l;
- do {
- l = qcam_read_bytes(q, tmpbuf, 1);
- if (current->need_resched)
- schedule();
- } while (l && tmpbuf[0] == 0x7e);
- l = qcam_read_bytes(q, tmpbuf+1, 2);
- if (force_rgb) {
- if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
- printk("qcam: bad EOFn");
- } else {
- if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
- printk("qcam: bad EOFn");
- }
- }
- qcam_write_data(q, 0);
- return len;
- }
- /*
- * Video4linux interfacing
- */
- static int qcam_open(struct video_device *dev, int flags)
- {
- return 0;
- }
- static void qcam_close(struct video_device *dev)
- {
- }
- static long qcam_write(struct video_device *v, const char *buf, unsigned long count, int noblock)
- {
- return -EINVAL;
- }
- static int qcam_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
- {
- struct qcam_device *qcam=(struct qcam_device *)dev;
-
- switch(cmd)
- {
- case VIDIOCGCAP:
- {
- struct video_capability b;
- strcpy(b.name, "Quickcam");
- b.type = VID_TYPE_CAPTURE|VID_TYPE_SCALES;
- b.channels = 1;
- b.audios = 0;
- b.maxwidth = 320;
- b.maxheight = 240;
- b.minwidth = 80;
- b.minheight = 60;
- if(copy_to_user(arg, &b,sizeof(b)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCGCHAN:
- {
- struct video_channel v;
- if(copy_from_user(&v, arg, sizeof(v)))
- return -EFAULT;
- if(v.channel!=0)
- return -EINVAL;
- v.flags=0;
- v.tuners=0;
- /* Good question.. its composite or SVHS so.. */
- v.type = VIDEO_TYPE_CAMERA;
- strcpy(v.name, "Camera");
- if(copy_to_user(arg, &v, sizeof(v)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSCHAN:
- {
- int v;
- if(copy_from_user(&v, arg,sizeof(v)))
- return -EFAULT;
- if(v!=0)
- return -EINVAL;
- return 0;
- }
- case VIDIOCGTUNER:
- {
- struct video_tuner v;
- if(copy_from_user(&v, arg, sizeof(v))!=0)
- return -EFAULT;
- if(v.tuner)
- return -EINVAL;
- strcpy(v.name, "Format");
- v.rangelow=0;
- v.rangehigh=0;
- v.flags= 0;
- v.mode = VIDEO_MODE_AUTO;
- if(copy_to_user(arg,&v,sizeof(v))!=0)
- return -EFAULT;
- return 0;
- }
- case VIDIOCSTUNER:
- {
- struct video_tuner v;
- if(copy_from_user(&v, arg, sizeof(v))!=0)
- return -EFAULT;
- if(v.tuner)
- return -EINVAL;
- if(v.mode!=VIDEO_MODE_AUTO)
- return -EINVAL;
- return 0;
- }
- case VIDIOCGPICT:
- {
- struct video_picture p;
- p.colour=0x8000;
- p.hue=0x8000;
- p.brightness=qcam->brightness<<8;
- p.contrast=qcam->contrast<<8;
- p.whiteness=qcam->whitebal<<8;
- p.depth=24;
- p.palette=VIDEO_PALETTE_RGB24;
- if(copy_to_user(arg, &p, sizeof(p)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSPICT:
- {
- struct video_picture p;
- if(copy_from_user(&p, arg, sizeof(p)))
- return -EFAULT;
- /*
- * Sanity check args
- */
- if (p.depth != 24 || p.palette != VIDEO_PALETTE_RGB24)
- return -EINVAL;
-
- /*
- * Now load the camera.
- */
- qcam->brightness = p.brightness>>8;
- qcam->contrast = p.contrast>>8;
- qcam->whitebal = p.whiteness>>8;
- down(&qcam->lock);
- parport_claim_or_block(qcam->pdev);
- qc_setup(qcam);
- parport_release(qcam->pdev);
- up(&qcam->lock);
- return 0;
- }
- case VIDIOCSWIN:
- {
- struct video_window vw;
- if(copy_from_user(&vw, arg,sizeof(vw)))
- return -EFAULT;
- if(vw.flags)
- return -EINVAL;
- if(vw.clipcount)
- return -EINVAL;
- if(vw.height<60||vw.height>240)
- return -EINVAL;
- if(vw.width<80||vw.width>320)
- return -EINVAL;
-
- qcam->width = 80;
- qcam->height = 60;
- qcam->mode = QC_DECIMATION_4;
-
- if(vw.width>=160 && vw.height>=120)
- {
- qcam->width = 160;
- qcam->height = 120;
- qcam->mode = QC_DECIMATION_2;
- }
- if(vw.width>=320 && vw.height>=240)
- {
- qcam->width = 320;
- qcam->height = 240;
- qcam->mode = QC_DECIMATION_1;
- }
- qcam->mode |= QC_MILLIONS;
- #if 0
- if(vw.width>=640 && vw.height>=480)
- {
- qcam->width = 640;
- qcam->height = 480;
- qcam->mode = QC_BILLIONS | QC_DECIMATION_1;
- }
- #endif
- /* Ok we figured out what to use from our
- wide choice */
- down(&qcam->lock);
- parport_claim_or_block(qcam->pdev);
- qc_setup(qcam);
- parport_release(qcam->pdev);
- up(&qcam->lock);
- return 0;
- }
- case VIDIOCGWIN:
- {
- struct video_window vw;
- memset(&vw, 0, sizeof(vw));
- vw.width=qcam->width;
- vw.height=qcam->height;
- if(copy_to_user(arg, &vw, sizeof(vw)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCCAPTURE:
- return -EINVAL;
- case VIDIOCGFBUF:
- return -EINVAL;
- case VIDIOCSFBUF:
- return -EINVAL;
- case VIDIOCKEY:
- return 0;
- case VIDIOCGFREQ:
- return -EINVAL;
- case VIDIOCSFREQ:
- return -EINVAL;
- case VIDIOCGAUDIO:
- return -EINVAL;
- case VIDIOCSAUDIO:
- return -EINVAL;
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
- }
- static long qcam_read(struct video_device *v, char *buf, unsigned long count, int noblock)
- {
- struct qcam_device *qcam=(struct qcam_device *)v;
- int len;
- down(&qcam->lock);
- parport_claim_or_block(qcam->pdev);
- /* Probably should have a semaphore against multiple users */
- len = qc_capture(qcam, buf,count);
- parport_release(qcam->pdev);
- up(&qcam->lock);
- return len;
- }
- /* video device template */
- static struct video_device qcam_template=
- {
- owner: THIS_MODULE,
- name: "Colour QuickCam",
- type: VID_TYPE_CAPTURE,
- hardware: VID_HARDWARE_QCAM_C,
- open: qcam_open,
- close: qcam_close,
- read: qcam_read,
- write: qcam_write,
- ioctl: qcam_ioctl,
- };
- /* Initialize the QuickCam driver control structure. */
- static struct qcam_device *qcam_init(struct parport *port)
- {
- struct qcam_device *q;
-
- q = kmalloc(sizeof(struct qcam_device), GFP_KERNEL);
- if(q==NULL)
- return NULL;
- q->pport = port;
- q->pdev = parport_register_device(port, "c-qcam", NULL, NULL,
- NULL, 0, NULL);
- q->bidirectional = (q->pport->modes & PARPORT_MODE_TRISTATE)?1:0;
- if (q->pdev == NULL)
- {
- printk(KERN_ERR "c-qcam: couldn't register for %s.n",
- port->name);
- kfree(q);
- return NULL;
- }
-
- memcpy(&q->vdev, &qcam_template, sizeof(qcam_template));
- init_MUTEX(&q->lock);
- q->width = q->ccd_width = 320;
- q->height = q->ccd_height = 240;
- q->mode = QC_MILLIONS | QC_DECIMATION_1;
- q->contrast = 192;
- q->brightness = 240;
- q->whitebal = 128;
- q->top = 1;
- q->left = 14;
- return q;
- }
- static struct qcam_device *qcams[MAX_CAMS];
- static unsigned int num_cams = 0;
- int init_cqcam(struct parport *port)
- {
- struct qcam_device *qcam;
- if (parport[0] != -1)
- {
- /* The user gave specific instructions */
- int i, found = 0;
- for (i = 0; i < MAX_CAMS && parport[i] != -1; i++)
- {
- if (parport[0] == port->number)
- found = 1;
- }
- if (!found)
- return -ENODEV;
- }
- if (num_cams == MAX_CAMS)
- return -ENOSPC;
- qcam = qcam_init(port);
- if (qcam==NULL)
- return -ENODEV;
-
- parport_claim_or_block(qcam->pdev);
- qc_reset(qcam);
-
- if (probe && qc_detect(qcam)==0)
- {
- parport_release(qcam->pdev);
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
- return -ENODEV;
- }
- qc_setup(qcam);
- parport_release(qcam->pdev);
-
- if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr)==-1)
- {
- printk(KERN_ERR "Unable to register Colour QuickCam on %sn",
- qcam->pport->name);
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
- return -ENODEV;
- }
- printk(KERN_INFO "video%d: Colour QuickCam found on %sn",
- qcam->vdev.minor, qcam->pport->name);
-
- qcams[num_cams++] = qcam;
- return 0;
- }
- void close_cqcam(struct qcam_device *qcam)
- {
- video_unregister_device(&qcam->vdev);
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
- }
- static void cq_attach(struct parport *port)
- {
- init_cqcam(port);
- }
- static void cq_detach(struct parport *port)
- {
- /* Write this some day. */
- }
- static struct parport_driver cqcam_driver = {
- "cqcam",
- cq_attach,
- cq_detach,
- NULL
- };
- static int __init cqcam_init (void)
- {
- printk(BANNER "n");
- return parport_register_driver(&cqcam_driver);
- }
- static void __exit cqcam_cleanup (void)
- {
- unsigned int i;
- for (i = 0; i < num_cams; i++)
- close_cqcam(qcams[i]);
- parport_unregister_driver(&cqcam_driver);
- }
- MODULE_AUTHOR("Philip Blundell <philb@gnu.org>");
- MODULE_DESCRIPTION(BANNER);
- MODULE_LICENSE("GPL");
- MODULE_PARM_DESC(parport ,"parport=<auto|n[,n]...> for port detection methodn
- probe=<0|1|2> for camera detection methodn
- force_rgb=<0|1> for RGB data format (default BGR)");
- MODULE_PARM(parport, "1-" __MODULE_STRING(MAX_CAMS) "i");
- MODULE_PARM(probe, "i");
- MODULE_PARM(force_rgb, "i");
- MODULE_PARM(video_nr,"i");
- module_init(cqcam_init);
- module_exit(cqcam_cleanup);