1 files changed, 855 insertions, 0 deletions

diff --git a/drivers/media/video/c-qcam.c b/drivers/media/video/c-qcam.c
new file mode 100644
index 00000000000..75442ec49f3
--- /dev/null
+++ b/drivers/media/video/c-qcam.c
@@ -0,0 +1,855 @@
+/*
+ *	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/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;
+		msleep_interruptible(100);
+	}
+
+	/* Probably somebody pulled the plug out.  Not much we can do. */
+	printk(KERN_ERR "c-qcam: ready1 timeout (%d) %x %x\n", 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;
+		msleep_interruptible(100);
+	}
+
+	/* Probably somebody pulled the plug out.  Not much we can do. */
+	printk(KERN_ERR "c-qcam: ready2 timeout (%d) %x %x %x\n", 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 %x\n", 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 __user *buf, unsigned long len)
+{
+	unsigned lines, pixelsperline, bitsperxfer;
+	unsigned int is_bi_dir = q->bidirectional;
+	size_t wantlen, outptr = 0;
+	char tmpbuf[BUFSZ];
+
+	if (!access_ok(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;
+		cond_resched();
+	}
+
+	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);
+			cond_resched();
+		} 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 EOF\n");
+		} else {
+			if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
+				printk("qcam: bad EOF\n");
+		}
+		qcam_set_ack(q, 0);
+		if (qcam_await_ready1(q, 1))
+		{
+			printk("qcam: no ack after EOF\n");
+			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 turnaround\n");
+			qc_setup(q);
+			return len;
+		}
+	}
+	else
+	{
+		int l;
+		do {
+			l = qcam_read_bytes(q, tmpbuf, 1);
+			cond_resched();
+		} 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 EOF\n");
+		} else {
+			if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
+				printk("qcam: bad EOF\n");
+		}
+	}
+
+	qcam_write_data(q, 0);
+	return len;
+}
+
+/*
+ *	Video4linux interfacing
+ */
+
+static int qcam_do_ioctl(struct inode *inode, struct file *file,
+			 unsigned int cmd, void *arg)
+{
+	struct video_device *dev = video_devdata(file);
+	struct qcam_device *qcam=(struct qcam_device *)dev;
+	
+	switch(cmd)
+	{
+		case VIDIOCGCAP:
+		{
+			struct video_capability *b = arg;
+			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;
+			return 0;
+		}
+		case VIDIOCGCHAN:
+		{
+			struct video_channel *v = arg;
+			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");
+			return 0;
+		}
+		case VIDIOCSCHAN:
+		{
+			struct video_channel *v = arg;
+			if(v->channel!=0)
+				return -EINVAL;
+			return 0;
+		}
+		case VIDIOCGTUNER:
+		{
+			struct video_tuner *v = arg;
+			if(v->tuner)
+				return -EINVAL;
+			memset(v,0,sizeof(*v));
+			strcpy(v->name, "Format");
+			v->mode = VIDEO_MODE_AUTO;
+			return 0;
+		}
+		case VIDIOCSTUNER:
+		{
+			struct video_tuner *v = arg;
+			if(v->tuner)
+				return -EINVAL;
+			if(v->mode!=VIDEO_MODE_AUTO)
+				return -EINVAL;
+			return 0;
+		}
+		case VIDIOCGPICT:
+		{
+			struct video_picture *p = arg;
+			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;
+			return 0;
+		}
+		case VIDIOCSPICT:
+		{
+			struct video_picture *p = arg;
+
+			/*
+			 *	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 = arg;
+
+			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 = arg;
+			memset(vw, 0, sizeof(*vw));
+			vw->width=qcam->width;
+			vw->height=qcam->height;
+			return 0;
+		}
+		case VIDIOCKEY:
+			return 0;
+		case VIDIOCCAPTURE:
+		case VIDIOCGFBUF:
+		case VIDIOCSFBUF:
+		case VIDIOCGFREQ:
+		case VIDIOCSFREQ:
+		case VIDIOCGAUDIO:
+		case VIDIOCSAUDIO:
+			return -EINVAL;
+		default:
+			return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+static int qcam_ioctl(struct inode *inode, struct file *file,
+		     unsigned int cmd, unsigned long arg)
+{
+	return video_usercopy(inode, file, cmd, arg, qcam_do_ioctl);
+}
+
+static ssize_t qcam_read(struct file *file, char __user *buf,
+			 size_t count, loff_t *ppos)
+{
+	struct video_device *v = video_devdata(file);
+	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 file_operations qcam_fops = {
+	.owner		= THIS_MODULE,
+	.open           = video_exclusive_open,
+	.release        = video_exclusive_release,
+	.ioctl          = qcam_ioctl,
+	.read		= qcam_read,
+	.llseek         = no_llseek,
+};
+
+static struct video_device qcam_template=
+{
+	.owner		= THIS_MODULE,
+	.name		= "Colour QuickCam",
+	.type		= VID_TYPE_CAPTURE,
+	.hardware	= VID_HARDWARE_QCAM_C,
+	.fops           = &qcam_fops,
+};
+
+/* 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;
+
+static 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 %s\n",
+		       qcam->pport->name);
+		parport_unregister_device(qcam->pdev);
+		kfree(qcam);
+		return -ENODEV;
+	}
+
+	printk(KERN_INFO "video%d: Colour QuickCam found on %s\n", 
+	       qcam->vdev.minor, qcam->pport->name);
+	
+	qcams[num_cams++] = qcam;
+
+	return 0;
+}
+
+static 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 = {
+	.name = "cqcam",
+	.attach = cq_attach,
+	.detach = cq_detach,
+};
+
+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");
+
+/* FIXME: parport=auto would never have worked, surely? --RR */
+MODULE_PARM_DESC(parport ,"parport=<auto|n[,n]...> for port detection method\n\
+probe=<0|1|2> for camera detection method\n\
+force_rgb=<0|1> for RGB data format (default BGR)");
+module_param_array(parport, int, NULL, 0);
+module_param(probe, int, 0);
+module_param(force_rgb, bool, 0);
+module_param(video_nr, int, 0);
+
+module_init(cqcam_init);
+module_exit(cqcam_cleanup);