drivers/media/usb/gspca/stv06xx/stv06xx_pb0100.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
  *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
  * Copyright (c) 2002, 2003 Tuukka Toivonen
  * Copyright (c) 2008 Erik Andrén
  *
  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  * P/N 861075-0040: Sensor HDCS1000        ASIC
  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  */

 /*
  * The spec file for the PB-0100 suggests the following for best quality
  * images after the sensor has been reset :
  *
  * PB_ADCGAINL      = R60 = 0x03 (3 dec)      : sets low reference of ADC
 						to produce good black level
  * PB_PREADCTRL     = R32 = 0x1400 (5120 dec) : Enables global gain changes
 						through R53
  * PB_ADCMINGAIN    = R52 = 0x10 (16 dec)     : Sets the minimum gain for
 						auto-exposure
  * PB_ADCGLOBALGAIN = R53 = 0x10 (16 dec)     : Sets the global gain
  * PB_EXPGAIN       = R14 = 0x11 (17 dec)     : Sets the auto-exposure value
  * PB_UPDATEINT     = R23 = 0x02 (2 dec)      : Sets the speed on
 						auto-exposure routine
  * PB_CFILLIN       = R5  = 0x0E (14 dec)     : Sets the frame rate
  */

 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

 #include "stv06xx_pb0100.h"

 struct pb0100_ctrls {
 	struct { /* one big happy control cluster... */
 		struct v4l2_ctrl *autogain;
 		struct v4l2_ctrl *gain;
 		struct v4l2_ctrl *exposure;
 		struct v4l2_ctrl *red;
 		struct v4l2_ctrl *blue;
 		struct v4l2_ctrl *natural;
 	};
 	struct v4l2_ctrl *target;
 };

 static struct v4l2_pix_format pb0100_mode[] = {
 /* low res / subsample modes disabled as they are only half res horizontal,
    halving the vertical resolution does not seem to work */
 	{
 		320,
 		240,
 		V4L2_PIX_FMT_SGRBG8,
 		V4L2_FIELD_NONE,
 		.sizeimage = 320 * 240,
 		.bytesperline = 320,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = PB0100_CROP_TO_VGA
 	},
 	{
 		352,
 		288,
 		V4L2_PIX_FMT_SGRBG8,
 		V4L2_FIELD_NONE,
 		.sizeimage = 352 * 288,
 		.bytesperline = 352,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 0
 	}
 };

 static int pb0100_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct gspca_dev *gspca_dev =
 		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 	struct sd *sd = (struct sd *)gspca_dev;
 	struct pb0100_ctrls *ctrls = sd->sensor_priv;
 	int err = -EINVAL;

 	switch (ctrl->id) {
 	case V4L2_CID_AUTOGAIN:
 		err = pb0100_set_autogain(gspca_dev, ctrl->val);
 		if (err)
 			break;
 		if (ctrl->val)
 			break;
 		err = pb0100_set_gain(gspca_dev, ctrls->gain->val);
 		if (err)
 			break;
 		err = pb0100_set_exposure(gspca_dev, ctrls->exposure->val);
 		break;
 	case V4L2_CTRL_CLASS_USER + 0x1001:
 		err = pb0100_set_autogain_target(gspca_dev, ctrl->val);
 		break;
 	}
 	return err;
 }

 static const struct v4l2_ctrl_ops pb0100_ctrl_ops = {
 	.s_ctrl = pb0100_s_ctrl,
 };

 static int pb0100_init_controls(struct sd *sd)
 {
 	struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 	struct pb0100_ctrls *ctrls;
 	static const struct v4l2_ctrl_config autogain_target = {
 		.ops = &pb0100_ctrl_ops,
 		.id = V4L2_CTRL_CLASS_USER + 0x1000,
 		.type = V4L2_CTRL_TYPE_INTEGER,
 		.name = "Automatic Gain Target",
 		.max = 255,
 		.step = 1,
 		.def = 128,
 	};
 	static const struct v4l2_ctrl_config natural_light = {
 		.ops = &pb0100_ctrl_ops,
 		.id = V4L2_CTRL_CLASS_USER + 0x1001,
 		.type = V4L2_CTRL_TYPE_BOOLEAN,
 		.name = "Natural Light Source",
 		.max = 1,
 		.step = 1,
 		.def = 1,
 	};

 	ctrls = kzalloc(sizeof(*ctrls), GFP_KERNEL);
 	if (!ctrls)
 		return -ENOMEM;

 	v4l2_ctrl_handler_init(hdl, 6);
 	ctrls->autogain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 			V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
 	ctrls->exposure = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 			V4L2_CID_EXPOSURE, 0, 511, 1, 12);
 	ctrls->gain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 			V4L2_CID_GAIN, 0, 255, 1, 128);
 	ctrls->red = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 			V4L2_CID_RED_BALANCE, -255, 255, 1, 0);
 	ctrls->blue = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
 			V4L2_CID_BLUE_BALANCE, -255, 255, 1, 0);
 	ctrls->natural = v4l2_ctrl_new_custom(hdl, &natural_light, NULL);
 	ctrls->target = v4l2_ctrl_new_custom(hdl, &autogain_target, NULL);
 	if (hdl->error) {
 		kfree(ctrls);
 		return hdl->error;
 	}
 	sd->sensor_priv = ctrls;
 	v4l2_ctrl_auto_cluster(5, &ctrls->autogain, 0, false);
 	return 0;
 }

 static int pb0100_probe(struct sd *sd)
 {
 	u16 sensor;
 	int err;

 	err = stv06xx_read_sensor(sd, PB_IDENT, &sensor);

 	if (err < 0)
 		return -ENODEV;
 	if ((sensor >> 8) != 0x64)
 		return -ENODEV;

 	pr_info("Photobit pb0100 sensor detected\n");

 	sd->gspca_dev.cam.cam_mode = pb0100_mode;
 	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(pb0100_mode);

 	return 0;
 }

 static int pb0100_start(struct sd *sd)
 {
 	int err, packet_size, max_packet_size;
 	struct usb_host_interface *alt;
 	struct usb_interface *intf;
 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 	struct cam *cam = &sd->gspca_dev.cam;
 	u32 mode = cam->cam_mode[sd->gspca_dev.curr_mode].priv;

 	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 	if (!alt)
 		return -ENODEV;

 	if (alt->desc.bNumEndpoints < 1)
 		return -ENODEV;

 	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);

 	/* If we don't have enough bandwidth use a lower framerate */
 	max_packet_size = sd->sensor->max_packet_size[sd->gspca_dev.curr_mode];
 	if (packet_size < max_packet_size)
 		stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
 	else
 		stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(5)|BIT(3)|BIT(1));

 	/* Setup sensor window */
 	if (mode & PB0100_CROP_TO_VGA) {
 		stv06xx_write_sensor(sd, PB_RSTART, 30);
 		stv06xx_write_sensor(sd, PB_CSTART, 20);
 		stv06xx_write_sensor(sd, PB_RWSIZE, 240 - 1);
 		stv06xx_write_sensor(sd, PB_CWSIZE, 320 - 1);
 	} else {
 		stv06xx_write_sensor(sd, PB_RSTART, 8);
 		stv06xx_write_sensor(sd, PB_CSTART, 4);
 		stv06xx_write_sensor(sd, PB_RWSIZE, 288 - 1);
 		stv06xx_write_sensor(sd, PB_CWSIZE, 352 - 1);
 	}

 	if (mode & PB0100_SUBSAMPLE) {
 		stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02); /* Wrong, FIXME */
 		stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);

 		stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
 	} else {
 		stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
 		stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
 		/* larger -> slower */
 		stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x20);
 	}

 	err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3)|BIT(1));
 	gspca_dbg(gspca_dev, D_STREAM, "Started stream, status: %d\n", err);

 	return (err < 0) ? err : 0;
 }

 static int pb0100_stop(struct sd *sd)
 {
 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 	int err;

 	err = stv06xx_write_sensor(sd, PB_ABORTFRAME, 1);

 	if (err < 0)
 		goto out;

 	/* Set bit 1 to zero */
 	err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));

 	gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
 out:
 	return (err < 0) ? err : 0;
 }

 /* FIXME: Sort the init commands out and put them into tables,
 	  this is only for getting the camera to work */
 /* FIXME: No error handling for now,
 	  add this once the init has been converted to proper tables */
 static int pb0100_init(struct sd *sd)
 {
 	stv06xx_write_bridge(sd, STV_REG00, 1);
 	stv06xx_write_bridge(sd, STV_SCAN_RATE, 0);

 	/* Reset sensor */
 	stv06xx_write_sensor(sd, PB_RESET, 1);
 	stv06xx_write_sensor(sd, PB_RESET, 0);

 	/* Disable chip */
 	stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));

 	/* Gain stuff...*/
 	stv06xx_write_sensor(sd, PB_PREADCTRL, BIT(12)|BIT(10)|BIT(6));
 	stv06xx_write_sensor(sd, PB_ADCGLOBALGAIN, 12);

 	/* Set up auto-exposure */
 	/* ADC VREF_HI new setting for a transition
 	  from the Expose1 to the Expose2 setting */
 	stv06xx_write_sensor(sd, PB_R28, 12);
 	/* gain max for autoexposure */
 	stv06xx_write_sensor(sd, PB_ADCMAXGAIN, 180);
 	/* gain min for autoexposure  */
 	stv06xx_write_sensor(sd, PB_ADCMINGAIN, 12);
 	/* Maximum frame integration time (programmed into R8)
 	   allowed for auto-exposure routine */
 	stv06xx_write_sensor(sd, PB_R54, 3);
 	/* Minimum frame integration time (programmed into R8)
 	   allowed for auto-exposure routine */
 	stv06xx_write_sensor(sd, PB_R55, 0);
 	stv06xx_write_sensor(sd, PB_UPDATEINT, 1);
 	/* R15  Expose0 (maximum that auto-exposure may use) */
 	stv06xx_write_sensor(sd, PB_R15, 800);
 	/* R17  Expose2 (minimum that auto-exposure may use) */
 	stv06xx_write_sensor(sd, PB_R17, 10);

 	stv06xx_write_sensor(sd, PB_EXPGAIN, 0);

 	/* 0x14 */
 	stv06xx_write_sensor(sd, PB_VOFFSET, 0);
 	/* 0x0D */
 	stv06xx_write_sensor(sd, PB_ADCGAINH, 11);
 	/* Set black level (important!) */
 	stv06xx_write_sensor(sd, PB_ADCGAINL, 0);

 	/* ??? */
 	stv06xx_write_bridge(sd, STV_REG00, 0x11);
 	stv06xx_write_bridge(sd, STV_REG03, 0x45);
 	stv06xx_write_bridge(sd, STV_REG04, 0x07);

 	/* Scan/timing for the sensor */
 	stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
 	stv06xx_write_sensor(sd, PB_CFILLIN, 14);
 	stv06xx_write_sensor(sd, PB_VBL, 0);
 	stv06xx_write_sensor(sd, PB_FINTTIME, 0);
 	stv06xx_write_sensor(sd, PB_RINTTIME, 123);

 	stv06xx_write_bridge(sd, STV_REG01, 0xc2);
 	stv06xx_write_bridge(sd, STV_REG02, 0xb0);
 	return 0;
 }

 static int pb0100_dump(struct sd *sd)
 {
 	return 0;
 }

 static int pb0100_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct pb0100_ctrls *ctrls = sd->sensor_priv;

 	err = stv06xx_write_sensor(sd, PB_G1GAIN, val);
 	if (!err)
 		err = stv06xx_write_sensor(sd, PB_G2GAIN, val);
 	gspca_dbg(gspca_dev, D_CONF, "Set green gain to %d, status: %d\n",
 		  val, err);

 	if (!err)
 		err = pb0100_set_red_balance(gspca_dev, ctrls->red->val);
 	if (!err)
 		err = pb0100_set_blue_balance(gspca_dev, ctrls->blue->val);

 	return err;
 }

 static int pb0100_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct pb0100_ctrls *ctrls = sd->sensor_priv;

 	val += ctrls->gain->val;
 	if (val < 0)
 		val = 0;
 	else if (val > 255)
 		val = 255;

 	err = stv06xx_write_sensor(sd, PB_RGAIN, val);
 	gspca_dbg(gspca_dev, D_CONF, "Set red gain to %d, status: %d\n",
 		  val, err);

 	return err;
 }

 static int pb0100_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct pb0100_ctrls *ctrls = sd->sensor_priv;

 	val += ctrls->gain->val;
 	if (val < 0)
 		val = 0;
 	else if (val > 255)
 		val = 255;

 	err = stv06xx_write_sensor(sd, PB_BGAIN, val);
 	gspca_dbg(gspca_dev, D_CONF, "Set blue gain to %d, status: %d\n",
 		  val, err);

 	return err;
 }

 static int pb0100_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	int err;

 	err = stv06xx_write_sensor(sd, PB_RINTTIME, val);
 	gspca_dbg(gspca_dev, D_CONF, "Set exposure to %d, status: %d\n",
 		  val, err);

 	return err;
 }

 static int pb0100_set_autogain(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct pb0100_ctrls *ctrls = sd->sensor_priv;

 	if (val) {
 		if (ctrls->natural->val)
 			val = BIT(6)|BIT(4)|BIT(0);
 		else
 			val = BIT(4)|BIT(0);
 	} else
 		val = 0;

 	err = stv06xx_write_sensor(sd, PB_EXPGAIN, val);
 	gspca_dbg(gspca_dev, D_CONF, "Set autogain to %d (natural: %d), status: %d\n",
 		  val, ctrls->natural->val, err);

 	return err;
 }

 static int pb0100_set_autogain_target(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err, totalpixels, brightpixels, darkpixels;
 	struct sd *sd = (struct sd *) gspca_dev;

 	/* Number of pixels counted by the sensor when subsampling the pixels.
 	 * Slightly larger than the real value to avoid oscillation */
 	totalpixels = gspca_dev->pixfmt.width * gspca_dev->pixfmt.height;
 	totalpixels = totalpixels/(8*8) + totalpixels/(64*64);

 	brightpixels = (totalpixels * val) >> 8;
 	darkpixels   = totalpixels - brightpixels;
 	err = stv06xx_write_sensor(sd, PB_R21, brightpixels);
 	if (!err)
 		err = stv06xx_write_sensor(sd, PB_R22, darkpixels);

 	gspca_dbg(gspca_dev, D_CONF, "Set autogain target to %d, status: %d\n",
 		  val, err);

 	return err;
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
	* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
	* Copyright (c) 2002, 2003 Tuukka Toivonen
	* Copyright (c) 2008 Erik Andrén
	*
	* P/N 861037: Sensor HDCS1000 ASIC STV0600
	* P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
	* P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
	* P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
	* P/N 861075-0040: Sensor HDCS1000 ASIC
	* P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
	* P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
	*/

	/*
	* The spec file for the PB-0100 suggests the following for best quality
	* images after the sensor has been reset :
	*
	* PB_ADCGAINL = R60 = 0x03 (3 dec) : sets low reference of ADC
	to produce good black level
	* PB_PREADCTRL = R32 = 0x1400 (5120 dec) : Enables global gain changes
	through R53
	* PB_ADCMINGAIN = R52 = 0x10 (16 dec) : Sets the minimum gain for
	auto-exposure
	* PB_ADCGLOBALGAIN = R53 = 0x10 (16 dec) : Sets the global gain
	* PB_EXPGAIN = R14 = 0x11 (17 dec) : Sets the auto-exposure value
	* PB_UPDATEINT = R23 = 0x02 (2 dec) : Sets the speed on
	auto-exposure routine
	* PB_CFILLIN = R5 = 0x0E (14 dec) : Sets the frame rate
	*/

	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

	#include "stv06xx_pb0100.h"

	struct pb0100_ctrls {
	struct { /* one big happy control cluster... */
	struct v4l2_ctrl *autogain;
	struct v4l2_ctrl *gain;
	struct v4l2_ctrl *exposure;
	struct v4l2_ctrl *red;
	struct v4l2_ctrl *blue;
	struct v4l2_ctrl *natural;
	};
	struct v4l2_ctrl *target;
	};

	static struct v4l2_pix_format pb0100_mode[] = {
	/* low res / subsample modes disabled as they are only half res horizontal,
	halving the vertical resolution does not seem to work */
	{
	320,
	240,
	V4L2_PIX_FMT_SGRBG8,
	V4L2_FIELD_NONE,
	.sizeimage = 320 * 240,
	.bytesperline = 320,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = PB0100_CROP_TO_VGA
	},
	{
	352,
	288,
	V4L2_PIX_FMT_SGRBG8,
	V4L2_FIELD_NONE,
	.sizeimage = 352 * 288,
	.bytesperline = 352,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 0
	}
	};

	static int pb0100_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct gspca_dev *gspca_dev =
	container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
	struct sd sd = (struct sd )gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;
	int err = -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_AUTOGAIN:
	err = pb0100_set_autogain(gspca_dev, ctrl->val);
	if (err)
	break;
	if (ctrl->val)
	break;
	err = pb0100_set_gain(gspca_dev, ctrls->gain->val);
	if (err)
	break;
	err = pb0100_set_exposure(gspca_dev, ctrls->exposure->val);
	break;
	case V4L2_CTRL_CLASS_USER + 0x1001:
	err = pb0100_set_autogain_target(gspca_dev, ctrl->val);
	break;
	}
	return err;
	}

	static const struct v4l2_ctrl_ops pb0100_ctrl_ops = {
	.s_ctrl = pb0100_s_ctrl,
	};

	static int pb0100_init_controls(struct sd *sd)
	{
	struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
	struct pb0100_ctrls *ctrls;
	static const struct v4l2_ctrl_config autogain_target = {
	.ops = &pb0100_ctrl_ops,
	.id = V4L2_CTRL_CLASS_USER + 0x1000,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Automatic Gain Target",
	.max = 255,
	.step = 1,
	.def = 128,
	};
	static const struct v4l2_ctrl_config natural_light = {
	.ops = &pb0100_ctrl_ops,
	.id = V4L2_CTRL_CLASS_USER + 0x1001,
	.type = V4L2_CTRL_TYPE_BOOLEAN,
	.name = "Natural Light Source",
	.max = 1,
	.step = 1,
	.def = 1,
	};

	ctrls = kzalloc(sizeof(*ctrls), GFP_KERNEL);
	if (!ctrls)
	return -ENOMEM;

	v4l2_ctrl_handler_init(hdl, 6);
	ctrls->autogain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
	V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
	ctrls->exposure = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
	V4L2_CID_EXPOSURE, 0, 511, 1, 12);
	ctrls->gain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
	V4L2_CID_GAIN, 0, 255, 1, 128);
	ctrls->red = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
	V4L2_CID_RED_BALANCE, -255, 255, 1, 0);
	ctrls->blue = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
	V4L2_CID_BLUE_BALANCE, -255, 255, 1, 0);
	ctrls->natural = v4l2_ctrl_new_custom(hdl, &natural_light, NULL);
	ctrls->target = v4l2_ctrl_new_custom(hdl, &autogain_target, NULL);
	if (hdl->error) {
	kfree(ctrls);
	return hdl->error;
	}
	sd->sensor_priv = ctrls;
	v4l2_ctrl_auto_cluster(5, &ctrls->autogain, 0, false);
	return 0;
	}

	static int pb0100_probe(struct sd *sd)
	{
	u16 sensor;
	int err;

	err = stv06xx_read_sensor(sd, PB_IDENT, &sensor);

	if (err < 0)
	return -ENODEV;
	if ((sensor >> 8) != 0x64)
	return -ENODEV;

	pr_info("Photobit pb0100 sensor detected\n");

	sd->gspca_dev.cam.cam_mode = pb0100_mode;
	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(pb0100_mode);

	return 0;
	}

	static int pb0100_start(struct sd *sd)
	{
	int err, packet_size, max_packet_size;
	struct usb_host_interface *alt;
	struct usb_interface *intf;
	struct gspca_dev gspca_dev = (struct gspca_dev )sd;
	struct cam *cam = &sd->gspca_dev.cam;
	u32 mode = cam->cam_mode[sd->gspca_dev.curr_mode].priv;

	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
	if (!alt)
	return -ENODEV;

	if (alt->desc.bNumEndpoints < 1)
	return -ENODEV;

	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);

	/* If we don't have enough bandwidth use a lower framerate */
	max_packet_size = sd->sensor->max_packet_size[sd->gspca_dev.curr_mode];
	if (packet_size < max_packet_size)
	stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)\|BIT(3)\|BIT(1));
	else
	stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(5)\|BIT(3)\|BIT(1));

	/* Setup sensor window */
	if (mode & PB0100_CROP_TO_VGA) {
	stv06xx_write_sensor(sd, PB_RSTART, 30);
	stv06xx_write_sensor(sd, PB_CSTART, 20);
	stv06xx_write_sensor(sd, PB_RWSIZE, 240 - 1);
	stv06xx_write_sensor(sd, PB_CWSIZE, 320 - 1);
	} else {
	stv06xx_write_sensor(sd, PB_RSTART, 8);
	stv06xx_write_sensor(sd, PB_CSTART, 4);
	stv06xx_write_sensor(sd, PB_RWSIZE, 288 - 1);
	stv06xx_write_sensor(sd, PB_CWSIZE, 352 - 1);
	}

	if (mode & PB0100_SUBSAMPLE) {
	stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02); /* Wrong, FIXME */
	stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);

	stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
	} else {
	stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
	stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
	/* larger -> slower */
	stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x20);
	}

	err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)\|BIT(3)\|BIT(1));
	gspca_dbg(gspca_dev, D_STREAM, "Started stream, status: %d\n", err);

	return (err < 0) ? err : 0;
	}

	static int pb0100_stop(struct sd *sd)
	{
	struct gspca_dev gspca_dev = (struct gspca_dev )sd;
	int err;

	err = stv06xx_write_sensor(sd, PB_ABORTFRAME, 1);

	if (err < 0)
	goto out;

	/* Set bit 1 to zero */
	err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)\|BIT(3));

	gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
	out:
	return (err < 0) ? err : 0;
	}

	/* FIXME: Sort the init commands out and put them into tables,
	this is only for getting the camera to work */
	/* FIXME: No error handling for now,
	add this once the init has been converted to proper tables */
	static int pb0100_init(struct sd *sd)
	{
	stv06xx_write_bridge(sd, STV_REG00, 1);
	stv06xx_write_bridge(sd, STV_SCAN_RATE, 0);

	/* Reset sensor */
	stv06xx_write_sensor(sd, PB_RESET, 1);
	stv06xx_write_sensor(sd, PB_RESET, 0);

	/* Disable chip */
	stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)\|BIT(3));

	/* Gain stuff...*/
	stv06xx_write_sensor(sd, PB_PREADCTRL, BIT(12)\|BIT(10)\|BIT(6));
	stv06xx_write_sensor(sd, PB_ADCGLOBALGAIN, 12);

	/* Set up auto-exposure */
	/* ADC VREF_HI new setting for a transition
	from the Expose1 to the Expose2 setting */
	stv06xx_write_sensor(sd, PB_R28, 12);
	/* gain max for autoexposure */
	stv06xx_write_sensor(sd, PB_ADCMAXGAIN, 180);
	/* gain min for autoexposure */
	stv06xx_write_sensor(sd, PB_ADCMINGAIN, 12);
	/* Maximum frame integration time (programmed into R8)
	allowed for auto-exposure routine */
	stv06xx_write_sensor(sd, PB_R54, 3);
	/* Minimum frame integration time (programmed into R8)
	allowed for auto-exposure routine */
	stv06xx_write_sensor(sd, PB_R55, 0);
	stv06xx_write_sensor(sd, PB_UPDATEINT, 1);
	/* R15 Expose0 (maximum that auto-exposure may use) */
	stv06xx_write_sensor(sd, PB_R15, 800);
	/* R17 Expose2 (minimum that auto-exposure may use) */
	stv06xx_write_sensor(sd, PB_R17, 10);

	stv06xx_write_sensor(sd, PB_EXPGAIN, 0);

	/* 0x14 */
	stv06xx_write_sensor(sd, PB_VOFFSET, 0);
	/* 0x0D */
	stv06xx_write_sensor(sd, PB_ADCGAINH, 11);
	/* Set black level (important!) */
	stv06xx_write_sensor(sd, PB_ADCGAINL, 0);

	/* ??? */
	stv06xx_write_bridge(sd, STV_REG00, 0x11);
	stv06xx_write_bridge(sd, STV_REG03, 0x45);
	stv06xx_write_bridge(sd, STV_REG04, 0x07);

	/* Scan/timing for the sensor */
	stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)\|BIT(3)\|BIT(1));
	stv06xx_write_sensor(sd, PB_CFILLIN, 14);
	stv06xx_write_sensor(sd, PB_VBL, 0);
	stv06xx_write_sensor(sd, PB_FINTTIME, 0);
	stv06xx_write_sensor(sd, PB_RINTTIME, 123);

	stv06xx_write_bridge(sd, STV_REG01, 0xc2);
	stv06xx_write_bridge(sd, STV_REG02, 0xb0);
	return 0;
	}

	static int pb0100_dump(struct sd *sd)
	{
	return 0;
	}

	static int pb0100_set_gain(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	struct sd sd = (struct sd ) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	err = stv06xx_write_sensor(sd, PB_G1GAIN, val);
	if (!err)
	err = stv06xx_write_sensor(sd, PB_G2GAIN, val);
	gspca_dbg(gspca_dev, D_CONF, "Set green gain to %d, status: %d\n",
	val, err);

	if (!err)
	err = pb0100_set_red_balance(gspca_dev, ctrls->red->val);
	if (!err)
	err = pb0100_set_blue_balance(gspca_dev, ctrls->blue->val);

	return err;
	}

	static int pb0100_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	struct sd sd = (struct sd ) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	val += ctrls->gain->val;
	if (val < 0)
	val = 0;
	else if (val > 255)
	val = 255;

	err = stv06xx_write_sensor(sd, PB_RGAIN, val);
	gspca_dbg(gspca_dev, D_CONF, "Set red gain to %d, status: %d\n",
	val, err);

	return err;
	}

	static int pb0100_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	struct sd sd = (struct sd ) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	val += ctrls->gain->val;
	if (val < 0)
	val = 0;
	else if (val > 255)
	val = 255;

	err = stv06xx_write_sensor(sd, PB_BGAIN, val);
	gspca_dbg(gspca_dev, D_CONF, "Set blue gain to %d, status: %d\n",
	val, err);

	return err;
	}

	static int pb0100_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	int err;

	err = stv06xx_write_sensor(sd, PB_RINTTIME, val);
	gspca_dbg(gspca_dev, D_CONF, "Set exposure to %d, status: %d\n",
	val, err);

	return err;
	}

	static int pb0100_set_autogain(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	struct sd sd = (struct sd ) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	if (val) {
	if (ctrls->natural->val)
	val = BIT(6)\|BIT(4)\|BIT(0);
	else
	val = BIT(4)\|BIT(0);
	} else
	val = 0;

	err = stv06xx_write_sensor(sd, PB_EXPGAIN, val);
	gspca_dbg(gspca_dev, D_CONF, "Set autogain to %d (natural: %d), status: %d\n",
	val, ctrls->natural->val, err);

	return err;
	}

	static int pb0100_set_autogain_target(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err, totalpixels, brightpixels, darkpixels;
	struct sd sd = (struct sd ) gspca_dev;

	/* Number of pixels counted by the sensor when subsampling the pixels.
	* Slightly larger than the real value to avoid oscillation */
	totalpixels = gspca_dev->pixfmt.width * gspca_dev->pixfmt.height;
	totalpixels = totalpixels/(88) + totalpixels/(6464);

	brightpixels = (totalpixels * val) >> 8;
	darkpixels = totalpixels - brightpixels;
	err = stv06xx_write_sensor(sd, PB_R21, brightpixels);
	if (!err)
	err = stv06xx_write_sensor(sd, PB_R22, darkpixels);

	gspca_dbg(gspca_dev, D_CONF, "Set autogain target to %d, status: %d\n",
	val, err);

	return err;
	}