Fixed MTP to work with TWRP

drivers/media/parport/Kconfig

@@ -0,0 +1,53 @@
+menuconfig MEDIA_PARPORT_SUPPORT
+	bool "ISA and parallel port devices"
+	depends on (ISA || PARPORT) && MEDIA_CAMERA_SUPPORT
+	help
+	  Enables drivers for ISA and parallel port bus. If you
+	  need media drivers using those legacy buses, say Y.
+
+if MEDIA_PARPORT_SUPPORT
+config VIDEO_BWQCAM
+	tristate "Quickcam BW Video For Linux"
+	depends on PARPORT && VIDEO_V4L2
+	select VIDEOBUF2_VMALLOC
+	help
+	  Say Y have if you the black and white version of the QuickCam
+	  camera. See the next option for the color version.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bw-qcam.
+
+config VIDEO_CQCAM
+	tristate "QuickCam Colour Video For Linux"
+	depends on PARPORT && VIDEO_V4L2
+	help
+	  This is the video4linux driver for the colour version of the
+	  Connectix QuickCam.  If you have one of these cameras, say Y here,
+	  otherwise say N.  This driver does not work with the original
+	  monochrome QuickCam, QuickCam VC or QuickClip.  It is also available
+	  as a module (c-qcam).
+	  Read <file:Documentation/video4linux/CQcam.txt> for more information.
+
+config VIDEO_PMS
+	tristate "Mediavision Pro Movie Studio Video For Linux"
+	depends on ISA && VIDEO_V4L2
+	help
+	  Say Y if you have the ISA Mediavision Pro Movie Studio
+	  capture card.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called pms.
+
+config VIDEO_W9966
+	tristate "W9966CF Webcam (FlyCam Supra and others) Video For Linux"
+	depends on PARPORT_1284 && PARPORT && VIDEO_V4L2
+	help
+	  Video4linux driver for Winbond's w9966 based Webcams.
+	  Currently tested with the LifeView FlyCam Supra.
+	  If you have one of these cameras, say Y here
+	  otherwise say N.
+	  This driver is also available as a module (w9966).
+
+	  Check out <file:Documentation/video4linux/w9966.txt> for more
+	  information.
+endif

drivers/media/parport/Makefile

@@ -0,0 +1,4 @@
+obj-$(CONFIG_VIDEO_CQCAM) += c-qcam.o
+obj-$(CONFIG_VIDEO_BWQCAM) += bw-qcam.o
+obj-$(CONFIG_VIDEO_W9966) += w9966.o
+obj-$(CONFIG_VIDEO_PMS) += pms.o

drivers/media/parport/c-qcam.c

@@ -0,0 +1,882 @@
+/*
+ *	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/mutex.h>
+#include <linux/jiffies.h>
+#include <linux/videodev2.h>
+#include <asm/uaccess.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+
+struct qcam {
+	struct v4l2_device v4l2_dev;
+	struct video_device vdev;
+	struct v4l2_ctrl_handler hdl;
+	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 mutex 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 v0.06"
+
+static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 };
+static int probe = 2;
+static bool force_rgb;
+static int video_nr = -1;
+
+/* 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);
+
+static struct qcam *qcams[MAX_CAMS];
+static unsigned int num_cams;
+
+static inline void qcam_set_ack(struct qcam *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 *qcam)
+{
+	return (parport_read_status(qcam->pport) & 0x8) ? 1 : 0;
+}
+
+static inline unsigned int qcam_ready2(struct qcam *qcam)
+{
+	return (parport_read_data(qcam->pport) & 0x1) ? 1 : 0;
+}
+
+static unsigned int qcam_await_ready1(struct qcam *qcam, int value)
+{
+	struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+	unsigned long oldjiffies = jiffies;
+	unsigned int i;
+
+	for (oldjiffies = jiffies;
+	     time_before(jiffies, oldjiffies + msecs_to_jiffies(40));)
+		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. */
+	v4l2_err(v4l2_dev, "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 *qcam, int value)
+{
+	struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+	unsigned long oldjiffies = jiffies;
+	unsigned int i;
+
+	for (oldjiffies = jiffies;
+	     time_before(jiffies, oldjiffies + msecs_to_jiffies(40));)
+		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. */
+	v4l2_err(v4l2_dev, "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 *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 *qcam, unsigned int data)
+{
+	struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+	unsigned int idata;
+
+	parport_write_data(qcam->pport, data);
+	idata = qcam_read_data(qcam);
+	if (data != idata) {
+		v4l2_warn(v4l2_dev, "sent %x but received %x\n", data,
+		       idata);
+		return 1;
+	}
+	return 0;
+}
+
+static inline int qcam_set(struct qcam *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 *qcam, unsigned int cmd)
+{
+	if (qcam_write_data(qcam, cmd))
+		return -1;
+	return qcam_read_data(qcam);
+}
+
+static int qc_detect(struct qcam *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 *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 *qcam)
+{
+	qc_reset(qcam);
+
+	/* Set the brightness. */
+	qcam_set(qcam, 11, qcam->brightness);
+
+	/* Set the height and width.  These refer to the actual
+	   CCD area *before* applying the selected decimation.  */
+	qcam_set(qcam, 17, qcam->ccd_height);
+	qcam_set(qcam, 19, qcam->ccd_width / 2);
+
+	/* Set top and left.  */
+	qcam_set(qcam, 0xd, qcam->top);
+	qcam_set(qcam, 0xf, qcam->left);
+
+	/* Set contrast and white balance.  */
+	qcam_set(qcam, 0x19, qcam->contrast);
+	qcam_set(qcam, 0x1f, qcam->whitebal);
+
+	/* Set the speed.  */
+	qcam_set(qcam, 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 *qcam, unsigned char *buf, unsigned int nbytes)
+{
+	unsigned int bytes = 0;
+
+	qcam_set_ack(qcam, 0);
+	if (qcam->bidirectional) {
+		/* It's a bidirectional port */
+		while (bytes < nbytes) {
+			unsigned int lo1, hi1, lo2, hi2;
+			unsigned char r, g, b;
+
+			if (qcam_await_ready2(qcam, 1))
+				return bytes;
+			lo1 = parport_read_data(qcam->pport) >> 1;
+			hi1 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
+			qcam_set_ack(qcam, 1);
+			if (qcam_await_ready2(qcam, 0))
+				return bytes;
+			lo2 = parport_read_data(qcam->pport) >> 1;
+			hi2 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
+			qcam_set_ack(qcam, 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(qcam, 1))
+				return bytes;
+			hi = (parport_read_status(qcam->pport) & 0xf0);
+			qcam_set_ack(qcam, 1);
+			if (qcam_await_ready1(qcam, 0))
+				return bytes;
+			lo = (parport_read_status(qcam->pport) & 0xf0);
+			qcam_set_ack(qcam, 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 *qcam, char __user *buf, unsigned long len)
+{
+	struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+	unsigned lines, pixelsperline;
+	unsigned int is_bi_dir = qcam->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(qcam, 41);
+
+		if (i == -1) {
+			qc_setup(qcam);
+			return -EIO;
+		}
+		if ((i & 0x80) == 0)
+			break;
+		schedule();
+	}
+
+	if (qcam_set(qcam, 7, (qcam->mode | (is_bi_dir ? 1 : 0)) + 1))
+		return -EIO;
+
+	lines = qcam->height;
+	pixelsperline = qcam->width;
+
+	if (is_bi_dir) {
+		/* Turn the port around */
+		parport_data_reverse(qcam->pport);
+		mdelay(3);
+		qcam_set_ack(qcam, 0);
+		if (qcam_await_ready1(qcam, 1)) {
+			qc_setup(qcam);
+			return -EIO;
+		}
+		qcam_set_ack(qcam, 1);
+		if (qcam_await_ready1(qcam, 0)) {
+			qc_setup(qcam);
+			return -EIO;
+		}
+	}
+
+	wantlen = lines * pixelsperline * 24 / 8;
+
+	while (wantlen) {
+		size_t t, s;
+
+		s = (wantlen > BUFSZ) ? BUFSZ : wantlen;
+		t = qcam_read_bytes(qcam, 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) {
+		v4l2_err(v4l2_dev, "short read.\n");
+		if (is_bi_dir)
+			parport_data_forward(qcam->pport);
+		qc_setup(qcam);
+		return len;
+	}
+
+	if (is_bi_dir) {
+		int l;
+
+		do {
+			l = qcam_read_bytes(qcam, 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)
+				v4l2_err(v4l2_dev, "bad EOF\n");
+		} else {
+			if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
+				v4l2_err(v4l2_dev, "bad EOF\n");
+		}
+		qcam_set_ack(qcam, 0);
+		if (qcam_await_ready1(qcam, 1)) {
+			v4l2_err(v4l2_dev, "no ack after EOF\n");
+			parport_data_forward(qcam->pport);
+			qc_setup(qcam);
+			return len;
+		}
+		parport_data_forward(qcam->pport);
+		mdelay(3);
+		qcam_set_ack(qcam, 1);
+		if (qcam_await_ready1(qcam, 0)) {
+			v4l2_err(v4l2_dev, "no ack to port turnaround\n");
+			qc_setup(qcam);
+			return len;
+		}
+	} else {
+		int l;
+
+		do {
+			l = qcam_read_bytes(qcam, tmpbuf, 1);
+			cond_resched();
+		} while (l && tmpbuf[0] == 0x7e);
+		l = qcam_read_bytes(qcam, tmpbuf + 1, 2);
+		if (force_rgb) {
+			if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
+				v4l2_err(v4l2_dev, "bad EOF\n");
+		} else {
+			if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
+				v4l2_err(v4l2_dev, "bad EOF\n");
+		}
+	}
+
+	qcam_write_data(qcam, 0);
+	return len;
+}
+
+/*
+ *	Video4linux interfacing
+ */
+
+static int qcam_querycap(struct file *file, void  *priv,
+					struct v4l2_capability *vcap)
+{
+	struct qcam *qcam = video_drvdata(file);
+
+	strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver));
+	strlcpy(vcap->card, "Color Quickcam", sizeof(vcap->card));
+	strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info));
+	vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+	vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
+	return 0;
+}
+
+static int qcam_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
+{
+	if (vin->index > 0)
+		return -EINVAL;
+	strlcpy(vin->name, "Camera", sizeof(vin->name));
+	vin->type = V4L2_INPUT_TYPE_CAMERA;
+	vin->audioset = 0;
+	vin->tuner = 0;
+	vin->std = 0;
+	vin->status = 0;
+	return 0;
+}
+
+static int qcam_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+	*inp = 0;
+	return 0;
+}
+
+static int qcam_s_input(struct file *file, void *fh, unsigned int inp)
+{
+	return (inp > 0) ? -EINVAL : 0;
+}
+
+static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+	struct qcam *qcam = video_drvdata(file);
+	struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+	pix->width = qcam->width;
+	pix->height = qcam->height;
+	pix->pixelformat = V4L2_PIX_FMT_RGB24;
+	pix->field = V4L2_FIELD_NONE;
+	pix->bytesperline = 3 * qcam->width;
+	pix->sizeimage = 3 * qcam->width * qcam->height;
+	/* Just a guess */
+	pix->colorspace = V4L2_COLORSPACE_SRGB;
+	return 0;
+}
+
+static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+	struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+	if (pix->height < 60 || pix->width < 80) {
+		pix->height = 60;
+		pix->width = 80;
+	} else if (pix->height < 120 || pix->width < 160) {
+		pix->height = 120;
+		pix->width = 160;
+	} else {
+		pix->height = 240;
+		pix->width = 320;
+	}
+	pix->pixelformat = V4L2_PIX_FMT_RGB24;
+	pix->field = V4L2_FIELD_NONE;
+	pix->bytesperline = 3 * pix->width;
+	pix->sizeimage = 3 * pix->width * pix->height;
+	/* Just a guess */
+	pix->colorspace = V4L2_COLORSPACE_SRGB;
+	return 0;
+}
+
+static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+	struct qcam *qcam = video_drvdata(file);
+	struct v4l2_pix_format *pix = &fmt->fmt.pix;
+	int ret = qcam_try_fmt_vid_cap(file, fh, fmt);
+
+	if (ret)
+		return ret;
+	switch (pix->height) {
+	case 60:
+		qcam->mode = QC_DECIMATION_4;
+		break;
+	case 120:
+		qcam->mode = QC_DECIMATION_2;
+		break;
+	default:
+		qcam->mode = QC_DECIMATION_1;
+		break;
+	}
+
+	mutex_lock(&qcam->lock);
+	qcam->mode |= QC_MILLIONS;
+	qcam->height = pix->height;
+	qcam->width = pix->width;
+	parport_claim_or_block(qcam->pdev);
+	qc_setup(qcam);
+	parport_release(qcam->pdev);
+	mutex_unlock(&qcam->lock);
+	return 0;
+}
+
+static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+	static struct v4l2_fmtdesc formats[] = {
+		{ 0, 0, 0,
+		  "RGB 8:8:8", V4L2_PIX_FMT_RGB24,
+		  { 0, 0, 0, 0 }
+		},
+	};
+	enum v4l2_buf_type type = fmt->type;
+
+	if (fmt->index > 0)
+		return -EINVAL;
+
+	*fmt = formats[fmt->index];
+	fmt->type = type;
+	return 0;
+}
+
+static ssize_t qcam_read(struct file *file, char __user *buf,
+			 size_t count, loff_t *ppos)
+{
+	struct qcam *qcam = video_drvdata(file);
+	int len;
+
+	mutex_lock(&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);
+	mutex_unlock(&qcam->lock);
+	return len;
+}
+
+static int qcam_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct qcam *qcam =
+		container_of(ctrl->handler, struct qcam, hdl);
+	int ret = 0;
+
+	mutex_lock(&qcam->lock);
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		qcam->brightness = ctrl->val;
+		break;
+	case V4L2_CID_CONTRAST:
+		qcam->contrast = ctrl->val;
+		break;
+	case V4L2_CID_GAMMA:
+		qcam->whitebal = ctrl->val;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	if (ret == 0) {
+		parport_claim_or_block(qcam->pdev);
+		qc_setup(qcam);
+		parport_release(qcam->pdev);
+	}
+	mutex_unlock(&qcam->lock);
+	return ret;
+}
+
+static const struct v4l2_file_operations qcam_fops = {
+	.owner		= THIS_MODULE,
+	.open		= v4l2_fh_open,
+	.release	= v4l2_fh_release,
+	.poll		= v4l2_ctrl_poll,
+	.unlocked_ioctl	= video_ioctl2,
+	.read		= qcam_read,
+};
+
+static const struct v4l2_ioctl_ops qcam_ioctl_ops = {
+	.vidioc_querycap    		    = qcam_querycap,
+	.vidioc_g_input      		    = qcam_g_input,
+	.vidioc_s_input      		    = qcam_s_input,
+	.vidioc_enum_input   		    = qcam_enum_input,
+	.vidioc_enum_fmt_vid_cap	    = qcam_enum_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap 		    = qcam_g_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap  		    = qcam_s_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap  	    = qcam_try_fmt_vid_cap,
+	.vidioc_log_status		    = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event		    = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event	    = v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_ctrl_ops qcam_ctrl_ops = {
+	.s_ctrl = qcam_s_ctrl,
+};
+
+/* Initialize the QuickCam driver control structure. */
+
+static struct qcam *qcam_init(struct parport *port)
+{
+	struct qcam *qcam;
+	struct v4l2_device *v4l2_dev;
+
+	qcam = kzalloc(sizeof(*qcam), GFP_KERNEL);
+	if (qcam == NULL)
+		return NULL;
+
+	v4l2_dev = &qcam->v4l2_dev;
+	strlcpy(v4l2_dev->name, "c-qcam", sizeof(v4l2_dev->name));
+
+	if (v4l2_device_register(NULL, v4l2_dev) < 0) {
+		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+		kfree(qcam);
+		return NULL;
+	}
+
+	v4l2_ctrl_handler_init(&qcam->hdl, 3);
+	v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+			  V4L2_CID_BRIGHTNESS, 0, 255, 1, 240);
+	v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+			  V4L2_CID_CONTRAST, 0, 255, 1, 192);
+	v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+			  V4L2_CID_GAMMA, 0, 255, 1, 128);
+	if (qcam->hdl.error) {
+		v4l2_err(v4l2_dev, "couldn't register controls\n");
+		v4l2_ctrl_handler_free(&qcam->hdl);
+		kfree(qcam);
+		return NULL;
+	}
+
+	qcam->pport = port;
+	qcam->pdev = parport_register_device(port, "c-qcam", NULL, NULL,
+					  NULL, 0, NULL);
+
+	qcam->bidirectional = (qcam->pport->modes & PARPORT_MODE_TRISTATE) ? 1 : 0;
+
+	if (qcam->pdev == NULL) {
+		v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name);
+		v4l2_ctrl_handler_free(&qcam->hdl);
+		kfree(qcam);
+		return NULL;
+	}
+
+	strlcpy(qcam->vdev.name, "Colour QuickCam", sizeof(qcam->vdev.name));
+	qcam->vdev.v4l2_dev = v4l2_dev;
+	qcam->vdev.fops = &qcam_fops;
+	qcam->vdev.ioctl_ops = &qcam_ioctl_ops;
+	qcam->vdev.release = video_device_release_empty;
+	qcam->vdev.ctrl_handler = &qcam->hdl;
+	video_set_drvdata(&qcam->vdev, qcam);
+
+	mutex_init(&qcam->lock);
+	qcam->width = qcam->ccd_width = 320;
+	qcam->height = qcam->ccd_height = 240;
+	qcam->mode = QC_MILLIONS | QC_DECIMATION_1;
+	qcam->contrast = 192;
+	qcam->brightness = 240;
+	qcam->whitebal = 128;
+	qcam->top = 1;
+	qcam->left = 14;
+	return qcam;
+}
+
+static int init_cqcam(struct parport *port)
+{
+	struct qcam *qcam;
+	struct v4l2_device *v4l2_dev;
+
+	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;
+
+	v4l2_dev = &qcam->v4l2_dev;
+
+	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) < 0) {
+		v4l2_err(v4l2_dev, "Unable to register Colour QuickCam on %s\n",
+		       qcam->pport->name);
+		parport_unregister_device(qcam->pdev);
+		kfree(qcam);
+		return -ENODEV;
+	}
+
+	v4l2_info(v4l2_dev, "%s: Colour QuickCam found on %s\n",
+	       video_device_node_name(&qcam->vdev), qcam->pport->name);
+
+	qcams[num_cams++] = qcam;
+
+	return 0;
+}
+
+static void close_cqcam(struct qcam *qcam)
+{
+	video_unregister_device(&qcam->vdev);
+	v4l2_ctrl_handler_free(&qcam->hdl);
+	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(KERN_INFO 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_VERSION("0.0.4");
+
+module_init(cqcam_init);
+module_exit(cqcam_cleanup);

drivers/media/parport/w9966.c

@@ -0,0 +1,980 @@
+/*
+	Winbond w9966cf Webcam parport driver.
+
+	Version 0.33
+
+	Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+/*
+	Supported devices:
+	*Lifeview FlyCam Supra (using the Philips saa7111a chip)
+
+	Does any other model using the w9966 interface chip exist ?
+
+	Todo:
+
+	*Add a working EPP mode, since DMA ECP read isn't implemented
+	in the parport drivers. (That's why it's so sloow)
+
+	*Add support for other ccd-control chips than the saa7111
+	please send me feedback on what kind of chips you have.
+
+	*Add proper probing. I don't know what's wrong with the IEEE1284
+	parport drivers but (IEEE1284_MODE_NIBBLE|IEEE1284_DEVICE_ID)
+	and nibble read seems to be broken for some peripherals.
+
+	*Add probing for onboard SRAM, port directions etc. (if possible)
+
+	*Add support for the hardware compressed modes (maybe using v4l2)
+
+	*Fix better support for the capture window (no skewed images, v4l
+	interface to capt. window)
+
+	*Probably some bugs that I don't know of
+
+	Please support me by sending feedback!
+
+	Changes:
+
+	Alan Cox:	Removed RGB mode for kernel merge, added THIS_MODULE
+			and owner support for newer module locks
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <linux/parport.h>
+
+/*#define DEBUG*/				/* Undef me for production */
+
+#ifdef DEBUG
+#define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a)
+#else
+#define DPRINTF(x...)
+#endif
+
+/*
+ *	Defines, simple typedefs etc.
+ */
+
+#define W9966_DRIVERNAME	"W9966CF Webcam"
+#define W9966_MAXCAMS		4	/* Maximum number of cameras */
+#define W9966_RBUFFER		2048	/* Read buffer (must be an even number) */
+#define W9966_SRAMSIZE		131072	/* 128kb */
+#define W9966_SRAMID		0x02	/* check w9966cf.pdf */
+
+/* Empirically determined window limits */
+#define W9966_WND_MIN_X		16
+#define W9966_WND_MIN_Y		14
+#define W9966_WND_MAX_X		705
+#define W9966_WND_MAX_Y		253
+#define W9966_WND_MAX_W		(W9966_WND_MAX_X - W9966_WND_MIN_X)
+#define W9966_WND_MAX_H		(W9966_WND_MAX_Y - W9966_WND_MIN_Y)
+
+/* Keep track of our current state */
+#define W9966_STATE_PDEV	0x01
+#define W9966_STATE_CLAIMED	0x02
+#define W9966_STATE_VDEV	0x04
+
+#define W9966_I2C_W_ID		0x48
+#define W9966_I2C_R_ID		0x49
+#define W9966_I2C_R_DATA	0x08
+#define W9966_I2C_R_CLOCK	0x04
+#define W9966_I2C_W_DATA	0x02
+#define W9966_I2C_W_CLOCK	0x01
+
+struct w9966 {
+	struct v4l2_device v4l2_dev;
+	struct v4l2_ctrl_handler hdl;
+	unsigned char dev_state;
+	unsigned char i2c_state;
+	unsigned short ppmode;
+	struct parport *pport;
+	struct pardevice *pdev;
+	struct video_device vdev;
+	unsigned short width;
+	unsigned short height;
+	unsigned char brightness;
+	signed char contrast;
+	signed char color;
+	signed char hue;
+	struct mutex lock;
+};
+
+/*
+ *	Module specific properties
+ */
+
+MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>");
+MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.33.1");
+
+#ifdef MODULE
+static char *pardev[] = {[0 ... W9966_MAXCAMS] = ""};
+#else
+static char *pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"};
+#endif
+module_param_array(pardev, charp, NULL, 0);
+MODULE_PARM_DESC(pardev, "pardev: where to search for\n"
+		"\teach camera. 'aggressive' means brute-force search.\n"
+		"\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n"
+		"\tcam 1 to parport3 and search every parport for cam 2 etc...");
+
+static int parmode;
+module_param(parmode, int, 0);
+MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp");
+
+static int video_nr = -1;
+module_param(video_nr, int, 0);
+
+static struct w9966 w9966_cams[W9966_MAXCAMS];
+
+/*
+ *	Private function defines
+ */
+
+
+/* Set camera phase flags, so we know what to uninit when terminating */
+static inline void w9966_set_state(struct w9966 *cam, int mask, int val)
+{
+	cam->dev_state = (cam->dev_state & ~mask) ^ val;
+}
+
+/* Get camera phase flags */
+static inline int w9966_get_state(struct w9966 *cam, int mask, int val)
+{
+	return ((cam->dev_state & mask) == val);
+}
+
+/* Claim parport for ourself */
+static void w9966_pdev_claim(struct w9966 *cam)
+{
+	if (w9966_get_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
+		return;
+	parport_claim_or_block(cam->pdev);
+	w9966_set_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED);
+}
+
+/* Release parport for others to use */
+static void w9966_pdev_release(struct w9966 *cam)
+{
+	if (w9966_get_state(cam, W9966_STATE_CLAIMED, 0))
+		return;
+	parport_release(cam->pdev);
+	w9966_set_state(cam, W9966_STATE_CLAIMED, 0);
+}
+
+/* Read register from W9966 interface-chip
+   Expects a claimed pdev
+   -1 on error, else register data (byte) */
+static int w9966_read_reg(struct w9966 *cam, int reg)
+{
+	/* ECP, read, regtransfer, REG, REG, REG, REG, REG */
+	const unsigned char addr = 0x80 | (reg & 0x1f);
+	unsigned char val;
+
+	if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
+		return -1;
+	if (parport_write(cam->pport, &addr, 1) != 1)
+		return -1;
+	if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
+		return -1;
+	if (parport_read(cam->pport, &val, 1) != 1)
+		return -1;
+
+	return val;
+}
+
+/* Write register to W9966 interface-chip
+   Expects a claimed pdev
+   -1 on error */
+static int w9966_write_reg(struct w9966 *cam, int reg, int data)
+{
+	/* ECP, write, regtransfer, REG, REG, REG, REG, REG */
+	const unsigned char addr = 0xc0 | (reg & 0x1f);
+	const unsigned char val = data;
+
+	if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
+		return -1;
+	if (parport_write(cam->pport, &addr, 1) != 1)
+		return -1;
+	if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
+		return -1;
+	if (parport_write(cam->pport, &val, 1) != 1)
+		return -1;
+
+	return 0;
+}
+
+/*
+ *	Ugly and primitive i2c protocol functions
+ */
+
+/* Sets the data line on the i2c bus.
+   Expects a claimed pdev. */
+static void w9966_i2c_setsda(struct w9966 *cam, int state)
+{
+	if (state)
+		cam->i2c_state |= W9966_I2C_W_DATA;
+	else
+		cam->i2c_state &= ~W9966_I2C_W_DATA;
+
+	w9966_write_reg(cam, 0x18, cam->i2c_state);
+	udelay(5);
+}
+
+/* Get peripheral clock line
+   Expects a claimed pdev. */
+static int w9966_i2c_getscl(struct w9966 *cam)
+{
+	const unsigned char state = w9966_read_reg(cam, 0x18);
+	return ((state & W9966_I2C_R_CLOCK) > 0);
+}
+
+/* Sets the clock line on the i2c bus.
+   Expects a claimed pdev. -1 on error */
+static int w9966_i2c_setscl(struct w9966 *cam, int state)
+{
+	unsigned long timeout;
+
+	if (state)
+		cam->i2c_state |= W9966_I2C_W_CLOCK;
+	else
+		cam->i2c_state &= ~W9966_I2C_W_CLOCK;
+
+	w9966_write_reg(cam, 0x18, cam->i2c_state);
+	udelay(5);
+
+	/* we go to high, we also expect the peripheral to ack. */
+	if (state) {
+		timeout = jiffies + 100;
+		while (!w9966_i2c_getscl(cam)) {
+			if (time_after(jiffies, timeout))
+				return -1;
+		}
+	}
+	return 0;
+}
+
+#if 0
+/* Get peripheral data line
+   Expects a claimed pdev. */
+static int w9966_i2c_getsda(struct w9966 *cam)
+{
+	const unsigned char state = w9966_read_reg(cam, 0x18);
+	return ((state & W9966_I2C_R_DATA) > 0);
+}
+#endif
+
+/* Write a byte with ack to the i2c bus.
+   Expects a claimed pdev. -1 on error */
+static int w9966_i2c_wbyte(struct w9966 *cam, int data)
+{
+	int i;
+
+	for (i = 7; i >= 0; i--) {
+		w9966_i2c_setsda(cam, (data >> i) & 0x01);
+
+		if (w9966_i2c_setscl(cam, 1) == -1)
+			return -1;
+		w9966_i2c_setscl(cam, 0);
+	}
+
+	w9966_i2c_setsda(cam, 1);
+
+	if (w9966_i2c_setscl(cam, 1) == -1)
+		return -1;
+	w9966_i2c_setscl(cam, 0);
+
+	return 0;
+}
+
+/* Read a data byte with ack from the i2c-bus
+   Expects a claimed pdev. -1 on error */
+#if 0
+static int w9966_i2c_rbyte(struct w9966 *cam)
+{
+	unsigned char data = 0x00;
+	int i;
+
+	w9966_i2c_setsda(cam, 1);
+
+	for (i = 0; i < 8; i++) {
+		if (w9966_i2c_setscl(cam, 1) == -1)
+			return -1;
+		data = data << 1;
+		if (w9966_i2c_getsda(cam))
+			data |= 0x01;
+
+		w9966_i2c_setscl(cam, 0);
+	}
+	return data;
+}
+#endif
+
+/* Read a register from the i2c device.
+   Expects claimed pdev. -1 on error */
+#if 0
+static int w9966_read_reg_i2c(struct w9966 *cam, int reg)
+{
+	int data;
+
+	w9966_i2c_setsda(cam, 0);
+	w9966_i2c_setscl(cam, 0);
+
+	if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
+	    w9966_i2c_wbyte(cam, reg) == -1)
+		return -1;
+
+	w9966_i2c_setsda(cam, 1);
+	if (w9966_i2c_setscl(cam, 1) == -1)
+		return -1;
+	w9966_i2c_setsda(cam, 0);
+	w9966_i2c_setscl(cam, 0);
+
+	if (w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1)
+		return -1;
+	data = w9966_i2c_rbyte(cam);
+	if (data == -1)
+		return -1;
+
+	w9966_i2c_setsda(cam, 0);
+
+	if (w9966_i2c_setscl(cam, 1) == -1)
+		return -1;
+	w9966_i2c_setsda(cam, 1);
+
+	return data;
+}
+#endif
+
+/* Write a register to the i2c device.
+   Expects claimed pdev. -1 on error */
+static int w9966_write_reg_i2c(struct w9966 *cam, int reg, int data)
+{
+	w9966_i2c_setsda(cam, 0);
+	w9966_i2c_setscl(cam, 0);
+
+	if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
+			w9966_i2c_wbyte(cam, reg) == -1 ||
+			w9966_i2c_wbyte(cam, data) == -1)
+		return -1;
+
+	w9966_i2c_setsda(cam, 0);
+	if (w9966_i2c_setscl(cam, 1) == -1)
+		return -1;
+
+	w9966_i2c_setsda(cam, 1);
+
+	return 0;
+}
+
+/* Find a good length for capture window (used both for W and H)
+   A bit ugly but pretty functional. The capture length
+   have to match the downscale */
+static int w9966_findlen(int near, int size, int maxlen)
+{
+	int bestlen = size;
+	int besterr = abs(near - bestlen);
+	int len;
+
+	for (len = size + 1; len < maxlen; len++) {
+		int err;
+		if (((64 * size) % len) != 0)
+			continue;
+
+		err = abs(near - len);
+
+		/* Only continue as long as we keep getting better values */
+		if (err > besterr)
+			break;
+
+		besterr = err;
+		bestlen = len;
+	}
+
+	return bestlen;
+}
+
+/* Modify capture window (if necessary)
+   and calculate downscaling
+   Return -1 on error */
+static int w9966_calcscale(int size, int min, int max, int *beg, int *end, unsigned char *factor)
+{
+	int maxlen = max - min;
+	int len = *end - *beg + 1;
+	int newlen = w9966_findlen(len, size, maxlen);
+	int err = newlen - len;
+
+	/* Check for bad format */
+	if (newlen > maxlen || newlen < size)
+		return -1;
+
+	/* Set factor (6 bit fixed) */
+	*factor = (64 * size) / newlen;
+	if (*factor == 64)
+		*factor = 0x00;	/* downscale is disabled */
+	else
+		*factor |= 0x80; /* set downscale-enable bit */
+
+	/* Modify old beginning and end */
+	*beg -= err / 2;
+	*end += err - (err / 2);
+
+	/* Move window if outside borders */
+	if (*beg < min) {
+		*end += min - *beg;
+		*beg += min - *beg;
+	}
+	if (*end > max) {
+		*beg -= *end - max;
+		*end -= *end - max;
+	}
+
+	return 0;
+}
+
+/* Setup the cameras capture window etc.
+   Expects a claimed pdev
+   return -1 on error */
+static int w9966_setup(struct w9966 *cam, int x1, int y1, int x2, int y2, int w, int h)
+{
+	unsigned int i;
+	unsigned int enh_s, enh_e;
+	unsigned char scale_x, scale_y;
+	unsigned char regs[0x1c];
+	unsigned char saa7111_regs[] = {
+		0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00,
+		0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00,
+		0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0
+	};
+
+
+	if (w * h * 2 > W9966_SRAMSIZE) {
+		DPRINTF("capture window exceeds SRAM size!.\n");
+		w = 200; h = 160;	/* Pick default values */
+	}
+
+	w &= ~0x1;
+	if (w < 2)
+		w = 2;
+	if (h < 1)
+		h = 1;
+	if (w > W9966_WND_MAX_W)
+		w = W9966_WND_MAX_W;
+	if (h > W9966_WND_MAX_H)
+		h = W9966_WND_MAX_H;
+
+	cam->width = w;
+	cam->height = h;
+
+	enh_s = 0;
+	enh_e = w * h * 2;
+
+	/* Modify capture window if necessary and calculate downscaling */
+	if (w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 ||
+			w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0)
+		return -1;
+
+	DPRINTF("%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n",
+			w, h, x1, x2, y1, y2, scale_x & ~0x80, scale_y & ~0x80);
+
+	/* Setup registers */
+	regs[0x00] = 0x00;			/* Set normal operation */
+	regs[0x01] = 0x18;			/* Capture mode */
+	regs[0x02] = scale_y;			/* V-scaling */
+	regs[0x03] = scale_x;			/* H-scaling */
+
+	/* Capture window */
+	regs[0x04] = (x1 & 0x0ff);		/* X-start (8 low bits) */
+	regs[0x05] = (x1 & 0x300)>>8;		/* X-start (2 high bits) */
+	regs[0x06] = (y1 & 0x0ff);		/* Y-start (8 low bits) */
+	regs[0x07] = (y1 & 0x300)>>8;		/* Y-start (2 high bits) */
+	regs[0x08] = (x2 & 0x0ff);		/* X-end (8 low bits) */
+	regs[0x09] = (x2 & 0x300)>>8;		/* X-end (2 high bits) */
+	regs[0x0a] = (y2 & 0x0ff);		/* Y-end (8 low bits) */
+
+	regs[0x0c] = W9966_SRAMID;		/* SRAM-banks (1x 128kb) */
+
+	/* Enhancement layer */
+	regs[0x0d] = (enh_s & 0x000ff);		/* Enh. start (0-7) */
+	regs[0x0e] = (enh_s & 0x0ff00) >> 8;	/* Enh. start (8-15) */
+	regs[0x0f] = (enh_s & 0x70000) >> 16;	/* Enh. start (16-17/18??) */
+	regs[0x10] = (enh_e & 0x000ff);		/* Enh. end (0-7) */
+	regs[0x11] = (enh_e & 0x0ff00) >> 8;	/* Enh. end (8-15) */
+	regs[0x12] = (enh_e & 0x70000) >> 16;	/* Enh. end (16-17/18??) */
+
+	/* Misc */
+	regs[0x13] = 0x40;			/* VEE control (raw 4:2:2) */
+	regs[0x17] = 0x00;			/* ??? */
+	regs[0x18] = cam->i2c_state = 0x00;	/* Serial bus */
+	regs[0x19] = 0xff;			/* I/O port direction control */
+	regs[0x1a] = 0xff;			/* I/O port data register */
+	regs[0x1b] = 0x10;			/* ??? */
+
+	/* SAA7111 chip settings */
+	saa7111_regs[0x0a] = cam->brightness;
+	saa7111_regs[0x0b] = cam->contrast;
+	saa7111_regs[0x0c] = cam->color;
+	saa7111_regs[0x0d] = cam->hue;
+
+	/* Reset (ECP-fifo & serial-bus) */
+	if (w9966_write_reg(cam, 0x00, 0x03) == -1)
+		return -1;
+
+	/* Write regs to w9966cf chip */
+	for (i = 0; i < 0x1c; i++)
+		if (w9966_write_reg(cam, i, regs[i]) == -1)
+			return -1;
+
+	/* Write regs to saa7111 chip */
+	for (i = 0; i < 0x20; i++)
+		if (w9966_write_reg_i2c(cam, i, saa7111_regs[i]) == -1)
+			return -1;
+
+	return 0;
+}
+
+/*
+ *	Video4linux interfacing
+ */
+
+static int cam_querycap(struct file *file, void  *priv,
+					struct v4l2_capability *vcap)
+{
+	struct w9966 *cam = video_drvdata(file);
+
+	strlcpy(vcap->driver, cam->v4l2_dev.name, sizeof(vcap->driver));
+	strlcpy(vcap->card, W9966_DRIVERNAME, sizeof(vcap->card));
+	strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info));
+	vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+	vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
+	return 0;
+}
+
+static int cam_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
+{
+	if (vin->index > 0)
+		return -EINVAL;
+	strlcpy(vin->name, "Camera", sizeof(vin->name));
+	vin->type = V4L2_INPUT_TYPE_CAMERA;
+	vin->audioset = 0;
+	vin->tuner = 0;
+	vin->std = 0;
+	vin->status = 0;
+	return 0;
+}
+
+static int cam_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+	*inp = 0;
+	return 0;
+}
+
+static int cam_s_input(struct file *file, void *fh, unsigned int inp)
+{
+	return (inp > 0) ? -EINVAL : 0;
+}
+
+static int cam_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct w9966 *cam =
+		container_of(ctrl->handler, struct w9966, hdl);
+	int ret = 0;
+
+	mutex_lock(&cam->lock);
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		cam->brightness = ctrl->val;
+		break;
+	case V4L2_CID_CONTRAST:
+		cam->contrast = ctrl->val;
+		break;
+	case V4L2_CID_SATURATION:
+		cam->color = ctrl->val;
+		break;
+	case V4L2_CID_HUE:
+		cam->hue = ctrl->val;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	if (ret == 0) {
+		w9966_pdev_claim(cam);
+
+		if (w9966_write_reg_i2c(cam, 0x0a, cam->brightness) == -1 ||
+		    w9966_write_reg_i2c(cam, 0x0b, cam->contrast) == -1 ||
+		    w9966_write_reg_i2c(cam, 0x0c, cam->color) == -1 ||
+		    w9966_write_reg_i2c(cam, 0x0d, cam->hue) == -1) {
+			ret = -EIO;
+		}
+
+		w9966_pdev_release(cam);
+	}
+	mutex_unlock(&cam->lock);
+	return ret;
+}
+
+static int cam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+	struct w9966 *cam = video_drvdata(file);
+	struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+	pix->width = cam->width;
+	pix->height = cam->height;
+	pix->pixelformat = V4L2_PIX_FMT_YUYV;
+	pix->field = V4L2_FIELD_NONE;
+	pix->bytesperline = 2 * cam->width;
+	pix->sizeimage = 2 * cam->width * cam->height;
+	/* Just a guess */
+	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	return 0;
+}
+
+static int cam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+	struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+	if (pix->width < 2)
+		pix->width = 2;
+	if (pix->height < 1)
+		pix->height = 1;
+	if (pix->width > W9966_WND_MAX_W)
+		pix->width = W9966_WND_MAX_W;
+	if (pix->height > W9966_WND_MAX_H)
+		pix->height = W9966_WND_MAX_H;
+	pix->pixelformat = V4L2_PIX_FMT_YUYV;
+	pix->field = V4L2_FIELD_NONE;
+	pix->bytesperline = 2 * pix->width;
+	pix->sizeimage = 2 * pix->width * pix->height;
+	/* Just a guess */
+	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	return 0;
+}
+
+static int cam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+	struct w9966 *cam = video_drvdata(file);
+	struct v4l2_pix_format *pix = &fmt->fmt.pix;
+	int ret = cam_try_fmt_vid_cap(file, fh, fmt);
+
+	if (ret)
+		return ret;
+
+	mutex_lock(&cam->lock);
+	/* Update camera regs */
+	w9966_pdev_claim(cam);
+	ret = w9966_setup(cam, 0, 0, 1023, 1023, pix->width, pix->height);
+	w9966_pdev_release(cam);
+	mutex_unlock(&cam->lock);
+	return ret;
+}
+
+static int cam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+	static struct v4l2_fmtdesc formats[] = {
+		{ 0, 0, 0,
+		  "YUV 4:2:2", V4L2_PIX_FMT_YUYV,
+		  { 0, 0, 0, 0 }
+		},
+	};
+	enum v4l2_buf_type type = fmt->type;
+
+	if (fmt->index > 0)
+		return -EINVAL;
+
+	*fmt = formats[fmt->index];
+	fmt->type = type;
+	return 0;
+}
+
+/* Capture data */
+static ssize_t w9966_v4l_read(struct file *file, char  __user *buf,
+		size_t count, loff_t *ppos)
+{
+	struct w9966 *cam = video_drvdata(file);
+	unsigned char addr = 0xa0;	/* ECP, read, CCD-transfer, 00000 */
+	unsigned char __user *dest = (unsigned char __user *)buf;
+	unsigned long dleft = count;
+	unsigned char *tbuf;
+
+	/* Why would anyone want more than this?? */
+	if (count > cam->width * cam->height * 2)
+		return -EINVAL;
+
+	mutex_lock(&cam->lock);
+	w9966_pdev_claim(cam);
+	w9966_write_reg(cam, 0x00, 0x02);	/* Reset ECP-FIFO buffer */
+	w9966_write_reg(cam, 0x00, 0x00);	/* Return to normal operation */
+	w9966_write_reg(cam, 0x01, 0x98);	/* Enable capture */
+
+	/* write special capture-addr and negotiate into data transfer */
+	if ((parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0) ||
+			(parport_write(cam->pport, &addr, 1) != 1) ||
+			(parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0)) {
+		w9966_pdev_release(cam);
+		mutex_unlock(&cam->lock);
+		return -EFAULT;
+	}
+
+	tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL);
+	if (tbuf == NULL) {
+		count = -ENOMEM;
+		goto out;
+	}
+
+	while (dleft > 0) {
+		unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft;
+
+		if (parport_read(cam->pport, tbuf, tsize) < tsize) {
+			count = -EFAULT;
+			goto out;
+		}
+		if (copy_to_user(dest, tbuf, tsize) != 0) {
+			count = -EFAULT;
+			goto out;
+		}
+		dest += tsize;
+		dleft -= tsize;
+	}
+
+	w9966_write_reg(cam, 0x01, 0x18);	/* Disable capture */
+
+out:
+	kfree(tbuf);
+	w9966_pdev_release(cam);
+	mutex_unlock(&cam->lock);
+
+	return count;
+}
+
+static const struct v4l2_file_operations w9966_fops = {
+	.owner		= THIS_MODULE,
+	.open		= v4l2_fh_open,
+	.release	= v4l2_fh_release,
+	.poll		= v4l2_ctrl_poll,
+	.unlocked_ioctl = video_ioctl2,
+	.read           = w9966_v4l_read,
+};
+
+static const struct v4l2_ioctl_ops w9966_ioctl_ops = {
+	.vidioc_querycap    		    = cam_querycap,
+	.vidioc_g_input      		    = cam_g_input,
+	.vidioc_s_input      		    = cam_s_input,
+	.vidioc_enum_input   		    = cam_enum_input,
+	.vidioc_enum_fmt_vid_cap 	    = cam_enum_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap 		    = cam_g_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap  		    = cam_s_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap  	    = cam_try_fmt_vid_cap,
+	.vidioc_log_status		    = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event		    = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event	    = v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_ctrl_ops cam_ctrl_ops = {
+	.s_ctrl = cam_s_ctrl,
+};
+
+
+/* Initialize camera device. Setup all internal flags, set a
+   default video mode, setup ccd-chip, register v4l device etc..
+   Also used for 'probing' of hardware.
+   -1 on error */
+static int w9966_init(struct w9966 *cam, struct parport *port)
+{
+	struct v4l2_device *v4l2_dev = &cam->v4l2_dev;
+
+	if (cam->dev_state != 0)
+		return -1;
+
+	strlcpy(v4l2_dev->name, "w9966", sizeof(v4l2_dev->name));
+
+	if (v4l2_device_register(NULL, v4l2_dev) < 0) {
+		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+		return -1;
+	}
+
+	v4l2_ctrl_handler_init(&cam->hdl, 4);
+	v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+			  V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
+	v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+			  V4L2_CID_CONTRAST, -64, 64, 1, 64);
+	v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+			  V4L2_CID_SATURATION, -64, 64, 1, 64);
+	v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+			  V4L2_CID_HUE, -128, 127, 1, 0);
+	if (cam->hdl.error) {
+		v4l2_err(v4l2_dev, "couldn't register controls\n");
+		return -1;
+	}
+	cam->pport = port;
+	cam->brightness = 128;
+	cam->contrast = 64;
+	cam->color = 64;
+	cam->hue = 0;
+
+	/* Select requested transfer mode */
+	switch (parmode) {
+	default:	/* Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) */
+	case 0:
+		if (port->modes & PARPORT_MODE_ECP)
+			cam->ppmode = IEEE1284_MODE_ECP;
+		else if (port->modes & PARPORT_MODE_EPP)
+			cam->ppmode = IEEE1284_MODE_EPP;
+		else
+			cam->ppmode = IEEE1284_MODE_ECP;
+		break;
+	case 1:		/* hw- or sw-ecp */
+		cam->ppmode = IEEE1284_MODE_ECP;
+		break;
+	case 2:		/* hw- or sw-epp */
+		cam->ppmode = IEEE1284_MODE_EPP;
+		break;
+	}
+
+	/* Tell the parport driver that we exists */
+	cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL);
+	if (cam->pdev == NULL) {
+		DPRINTF("parport_register_device() failed\n");
+		return -1;
+	}
+	w9966_set_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV);
+
+	w9966_pdev_claim(cam);
+
+	/* Setup a default capture mode */
+	if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) {
+		DPRINTF("w9966_setup() failed.\n");
+		return -1;
+	}
+
+	w9966_pdev_release(cam);
+
+	/* Fill in the video_device struct and register us to v4l */
+	strlcpy(cam->vdev.name, W9966_DRIVERNAME, sizeof(cam->vdev.name));
+	cam->vdev.v4l2_dev = v4l2_dev;
+	cam->vdev.fops = &w9966_fops;
+	cam->vdev.ioctl_ops = &w9966_ioctl_ops;
+	cam->vdev.release = video_device_release_empty;
+	cam->vdev.ctrl_handler = &cam->hdl;
+	video_set_drvdata(&cam->vdev, cam);
+
+	mutex_init(&cam->lock);
+
+	if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
+		return -1;
+
+	w9966_set_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
+
+	/* All ok */
+	v4l2_info(v4l2_dev, "Found and initialized a webcam on %s.\n",
+			cam->pport->name);
+	return 0;
+}
+
+
+/* Terminate everything gracefully */
+static void w9966_term(struct w9966 *cam)
+{
+	/* Unregister from v4l */
+	if (w9966_get_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
+		video_unregister_device(&cam->vdev);
+		w9966_set_state(cam, W9966_STATE_VDEV, 0);
+	}
+
+	v4l2_ctrl_handler_free(&cam->hdl);
+
+	/* Terminate from IEEE1284 mode and release pdev block */
+	if (w9966_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
+		w9966_pdev_claim(cam);
+		parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT);
+		w9966_pdev_release(cam);
+	}
+
+	/* Unregister from parport */
+	if (w9966_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
+		parport_unregister_device(cam->pdev);
+		w9966_set_state(cam, W9966_STATE_PDEV, 0);
+	}
+	memset(cam, 0, sizeof(*cam));
+}
+
+
+/* Called once for every parport on init */
+static void w9966_attach(struct parport *port)
+{
+	int i;
+
+	for (i = 0; i < W9966_MAXCAMS; i++) {
+		if (w9966_cams[i].dev_state != 0)	/* Cam is already assigned */
+			continue;
+		if (strcmp(pardev[i], "aggressive") == 0 || strcmp(pardev[i], port->name) == 0) {
+			if (w9966_init(&w9966_cams[i], port) != 0)
+				w9966_term(&w9966_cams[i]);
+			break;	/* return */
+		}
+	}
+}
+
+/* Called once for every parport on termination */
+static void w9966_detach(struct parport *port)
+{
+	int i;
+
+	for (i = 0; i < W9966_MAXCAMS; i++)
+		if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port)
+			w9966_term(&w9966_cams[i]);
+}
+
+
+static struct parport_driver w9966_ppd = {
+	.name = W9966_DRIVERNAME,
+	.attach = w9966_attach,
+	.detach = w9966_detach,
+};
+
+/* Module entry point */
+static int __init w9966_mod_init(void)
+{
+	int i;
+
+	for (i = 0; i < W9966_MAXCAMS; i++)
+		w9966_cams[i].dev_state = 0;
+
+	return parport_register_driver(&w9966_ppd);
+}
+
+/* Module cleanup */
+static void __exit w9966_mod_term(void)
+{
+	parport_unregister_driver(&w9966_ppd);
+}
+
+module_init(w9966_mod_init);
+module_exit(w9966_mod_term);