[media] move parallel port/isa video drivers to drivers/media/parport/

We should keep just the I2C drivers under drivers/media/video, and
then rename it to drivers/media/i2c.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 981 insertions, 0 deletions

diff --git a/drivers/media/parport/w9966.c b/drivers/media/parport/w9966.c
new file mode 100644
index 000000000000..db2a6003a1c3
--- /dev/null
+++ b/drivers/media/parport/w9966.c
@@ -0,0 +1,981 @@
+/*
+	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;
+	set_bit(V4L2_FL_USE_FH_PRIO, &cam->vdev.flags);
+	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);