drivers/media/usb/gspca/stv06xx/stv06xx_st6422.c - linux-mtk - Git at Google

 /*
  * Support for the sensor part which is integrated (I think) into the
  * st6422 stv06xx alike bridge, as its integrated there are no i2c writes
  * but instead direct bridge writes.
  *
  * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
  *
  * Strongly based on qc-usb-messenger, which is:
  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
  *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
  * Copyright (c) 2002, 2003 Tuukka Toivonen
  *
  * 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.
  *
  */

 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

 #include "stv06xx_st6422.h"

 static struct v4l2_pix_format st6422_mode[] = {
 	/* Note we actually get 124 lines of data, of which we skip the 4st
 	   4 as they are garbage */
 	{
 		162,
 		120,
 		V4L2_PIX_FMT_SGRBG8,
 		V4L2_FIELD_NONE,
 		.sizeimage = 162 * 120,
 		.bytesperline = 162,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 1
 	},
 	/* Note we actually get 248 lines of data, of which we skip the 4st
 	   4 as they are garbage, and we tell the app it only gets the
 	   first 240 of the 244 lines it actually gets, so that it ignores
 	   the last 4. */
 	{
 		324,
 		240,
 		V4L2_PIX_FMT_SGRBG8,
 		V4L2_FIELD_NONE,
 		.sizeimage = 324 * 244,
 		.bytesperline = 324,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 0
 	},
 };

 /* V4L2 controls supported by the driver */
 static int setbrightness(struct sd *sd, s32 val);
 static int setcontrast(struct sd *sd, s32 val);
 static int setgain(struct sd *sd, u8 gain);
 static int setexposure(struct sd *sd, s16 expo);

 static int st6422_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;
 	int err = -EINVAL;

 	switch (ctrl->id) {
 	case V4L2_CID_BRIGHTNESS:
 		err = setbrightness(sd, ctrl->val);
 		break;
 	case V4L2_CID_CONTRAST:
 		err = setcontrast(sd, ctrl->val);
 		break;
 	case V4L2_CID_GAIN:
 		err = setgain(sd, ctrl->val);
 		break;
 	case V4L2_CID_EXPOSURE:
 		err = setexposure(sd, ctrl->val);
 		break;
 	}

 	/* commit settings */
 	if (err >= 0)
 		err = stv06xx_write_bridge(sd, 0x143f, 0x01);
 	sd->gspca_dev.usb_err = err;
 	return err;
 }

 static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
 	.s_ctrl = st6422_s_ctrl,
 };

 static int st6422_init_controls(struct sd *sd)
 {
 	struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;

 	v4l2_ctrl_handler_init(hdl, 4);
 	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 			V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
 	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 			V4L2_CID_CONTRAST, 0, 15, 1, 11);
 	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 			V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
 	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 			V4L2_CID_GAIN, 0, 255, 1, 64);

 	return hdl->error;
 }

 static int st6422_probe(struct sd *sd)
 {
 	if (sd->bridge != BRIDGE_ST6422)
 		return -ENODEV;

 	pr_info("st6422 sensor detected\n");

 	sd->gspca_dev.cam.cam_mode = st6422_mode;
 	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
 	return 0;
 }

 static int st6422_init(struct sd *sd)
 {
 	int err = 0, i;

 	const u16 st6422_bridge_init[][2] = {
 		{ STV_ISO_ENABLE, 0x00 }, /* disable capture */
 		{ 0x1436, 0x00 },
 		{ 0x1432, 0x03 },	/* 0x00-0x1F brightness */
 		{ 0x143a, 0xf9 },	/* 0x00-0x0F contrast */
 		{ 0x0509, 0x38 },	/* R */
 		{ 0x050a, 0x38 },	/* G */
 		{ 0x050b, 0x38 },	/* B */
 		{ 0x050c, 0x2a },
 		{ 0x050d, 0x01 },


 		{ 0x1431, 0x00 },	/* 0x00-0x07 ??? */
 		{ 0x1433, 0x34 },	/* 160x120, 0x00-0x01 night filter */
 		{ 0x1438, 0x18 },	/* 640x480 */
 /* 18 bayes */
 /* 10 compressed? */

 		{ 0x1439, 0x00 },
 /* anti-noise?  0xa2 gives a perfect image */

 		{ 0x143b, 0x05 },
 		{ 0x143c, 0x00 },	/* 0x00-0x01 - ??? */


 /* shutter time 0x0000-0x03FF */
 /* low value  give good picures on moving objects (but requires much light) */
 /* high value gives good picures in darkness (but tends to be overexposed) */
 		{ 0x143e, 0x01 },
 		{ 0x143d, 0x00 },

 		{ 0x1442, 0xe2 },
 /* write: 1x1x xxxx */
 /* read:  1x1x xxxx */
 /*        bit 5 == button pressed and hold if 0 */
 /* write 0xe2,0xea */

 /* 0x144a */
 /* 0x00 init */
 /* bit 7 == button has been pressed, but not handled */

 /* interrupt */
 /* if(urb->iso_frame_desc[i].status == 0x80) { */
 /* if(urb->iso_frame_desc[i].status == 0x88) { */

 		{ 0x1500, 0xd0 },
 		{ 0x1500, 0xd0 },
 		{ 0x1500, 0x50 },	/* 0x00 - 0xFF  0x80 == compr ? */

 		{ 0x1501, 0xaf },
 /* high val-> light area gets darker */
 /* low val -> light area gets lighter */
 		{ 0x1502, 0xc2 },
 /* high val-> light area gets darker */
 /* low val -> light area gets lighter */
 		{ 0x1503, 0x45 },
 /* high val-> light area gets darker */
 /* low val -> light area gets lighter */
 		{ 0x1505, 0x02 },
 /* 2  : 324x248  80352 bytes */
 /* 7  : 248x162  40176 bytes */
 /* c+f: 162*124  20088 bytes */

 		{ 0x150e, 0x8e },
 		{ 0x150f, 0x37 },
 		{ 0x15c0, 0x00 },
 		{ 0x15c3, 0x08 },	/* 0x04/0x14 ... test pictures ??? */


 		{ 0x143f, 0x01 },	/* commit settings */

 	};

 	for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
 		err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
 					       st6422_bridge_init[i][1]);
 	}

 	return err;
 }

 static int setbrightness(struct sd *sd, s32 val)
 {
 	/* val goes from 0 -> 31 */
 	return stv06xx_write_bridge(sd, 0x1432, val);
 }

 static int setcontrast(struct sd *sd, s32 val)
 {
 	/* Val goes from 0 -> 15 */
 	return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
 }

 static int setgain(struct sd *sd, u8 gain)
 {
 	int err;

 	/* Set red, green, blue, gain */
 	err = stv06xx_write_bridge(sd, 0x0509, gain);
 	if (err < 0)
 		return err;

 	err = stv06xx_write_bridge(sd, 0x050a, gain);
 	if (err < 0)
 		return err;

 	err = stv06xx_write_bridge(sd, 0x050b, gain);
 	if (err < 0)
 		return err;

 	/* 2 mystery writes */
 	err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
 	if (err < 0)
 		return err;

 	return stv06xx_write_bridge(sd, 0x050d, 0x01);
 }

 static int setexposure(struct sd *sd, s16 expo)
 {
 	int err;

 	err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
 	if (err < 0)
 		return err;

 	return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
 }

 static int st6422_start(struct sd *sd)
 {
 	int err;
 	struct cam *cam = &sd->gspca_dev.cam;

 	if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
 		err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
 	else
 		err = stv06xx_write_bridge(sd, 0x1505, 0x02);
 	if (err < 0)
 		return err;

 	/* commit settings */
 	err = stv06xx_write_bridge(sd, 0x143f, 0x01);
 	return (err < 0) ? err : 0;
 }

 static int st6422_stop(struct sd *sd)
 {
 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;

 	gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");

 	return 0;
 }
	/*
	* Support for the sensor part which is integrated (I think) into the
	* st6422 stv06xx alike bridge, as its integrated there are no i2c writes
	* but instead direct bridge writes.
	*
	* Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
	*
	* Strongly based on qc-usb-messenger, which is:
	* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
	* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
	* Copyright (c) 2002, 2003 Tuukka Toivonen
	*
	* 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.
	*
	*/

	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

	#include "stv06xx_st6422.h"

	static struct v4l2_pix_format st6422_mode[] = {
	/* Note we actually get 124 lines of data, of which we skip the 4st
	4 as they are garbage */
	{
	162,
	120,
	V4L2_PIX_FMT_SGRBG8,
	V4L2_FIELD_NONE,
	.sizeimage = 162 * 120,
	.bytesperline = 162,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 1
	},
	/* Note we actually get 248 lines of data, of which we skip the 4st
	4 as they are garbage, and we tell the app it only gets the
	first 240 of the 244 lines it actually gets, so that it ignores
	the last 4. */
	{
	324,
	240,
	V4L2_PIX_FMT_SGRBG8,
	V4L2_FIELD_NONE,
	.sizeimage = 324 * 244,
	.bytesperline = 324,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 0
	},
	};

	/* V4L2 controls supported by the driver */
	static int setbrightness(struct sd *sd, s32 val);
	static int setcontrast(struct sd *sd, s32 val);
	static int setgain(struct sd *sd, u8 gain);
	static int setexposure(struct sd *sd, s16 expo);

	static int st6422_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;
	int err = -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
	err = setbrightness(sd, ctrl->val);
	break;
	case V4L2_CID_CONTRAST:
	err = setcontrast(sd, ctrl->val);
	break;
	case V4L2_CID_GAIN:
	err = setgain(sd, ctrl->val);
	break;
	case V4L2_CID_EXPOSURE:
	err = setexposure(sd, ctrl->val);
	break;
	}

	/* commit settings */
	if (err >= 0)
	err = stv06xx_write_bridge(sd, 0x143f, 0x01);
	sd->gspca_dev.usb_err = err;
	return err;
	}

	static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
	.s_ctrl = st6422_s_ctrl,
	};

	static int st6422_init_controls(struct sd *sd)
	{
	struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;

	v4l2_ctrl_handler_init(hdl, 4);
	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
	V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
	V4L2_CID_CONTRAST, 0, 15, 1, 11);
	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
	V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
	v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
	V4L2_CID_GAIN, 0, 255, 1, 64);

	return hdl->error;
	}

	static int st6422_probe(struct sd *sd)
	{
	if (sd->bridge != BRIDGE_ST6422)
	return -ENODEV;

	pr_info("st6422 sensor detected\n");

	sd->gspca_dev.cam.cam_mode = st6422_mode;
	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
	return 0;
	}

	static int st6422_init(struct sd *sd)
	{
	int err = 0, i;

	const u16 st6422_bridge_init[][2] = {
	{ STV_ISO_ENABLE, 0x00 }, /* disable capture */
	{ 0x1436, 0x00 },
	{ 0x1432, 0x03 }, /* 0x00-0x1F brightness */
	{ 0x143a, 0xf9 }, /* 0x00-0x0F contrast */
	{ 0x0509, 0x38 }, /* R */
	{ 0x050a, 0x38 }, /* G */
	{ 0x050b, 0x38 }, /* B */
	{ 0x050c, 0x2a },
	{ 0x050d, 0x01 },


	{ 0x1431, 0x00 }, /* 0x00-0x07 ??? */
	{ 0x1433, 0x34 }, /* 160x120, 0x00-0x01 night filter */
	{ 0x1438, 0x18 }, /* 640x480 */
	/* 18 bayes */
	/* 10 compressed? */

	{ 0x1439, 0x00 },
	/* anti-noise? 0xa2 gives a perfect image */

	{ 0x143b, 0x05 },
	{ 0x143c, 0x00 }, /* 0x00-0x01 - ??? */


	/* shutter time 0x0000-0x03FF */
	/* low value give good picures on moving objects (but requires much light) */
	/* high value gives good picures in darkness (but tends to be overexposed) */
	{ 0x143e, 0x01 },
	{ 0x143d, 0x00 },

	{ 0x1442, 0xe2 },
	/* write: 1x1x xxxx */
	/* read: 1x1x xxxx */
	/* bit 5 == button pressed and hold if 0 */
	/* write 0xe2,0xea */

	/* 0x144a */
	/* 0x00 init */
	/* bit 7 == button has been pressed, but not handled */

	/* interrupt */
	/* if(urb->iso_frame_desc[i].status == 0x80) { */
	/* if(urb->iso_frame_desc[i].status == 0x88) { */

	{ 0x1500, 0xd0 },
	{ 0x1500, 0xd0 },
	{ 0x1500, 0x50 }, /* 0x00 - 0xFF 0x80 == compr ? */

	{ 0x1501, 0xaf },
	/* high val-> light area gets darker */
	/* low val -> light area gets lighter */
	{ 0x1502, 0xc2 },
	/* high val-> light area gets darker */
	/* low val -> light area gets lighter */
	{ 0x1503, 0x45 },
	/* high val-> light area gets darker */
	/* low val -> light area gets lighter */
	{ 0x1505, 0x02 },
	/* 2 : 324x248 80352 bytes */
	/* 7 : 248x162 40176 bytes */
	/* c+f: 162124 20088 bytes /

	{ 0x150e, 0x8e },
	{ 0x150f, 0x37 },
	{ 0x15c0, 0x00 },
	{ 0x15c3, 0x08 }, /* 0x04/0x14 ... test pictures ??? */


	{ 0x143f, 0x01 }, /* commit settings */

	};

	for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
	err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
	st6422_bridge_init[i][1]);
	}

	return err;
	}

	static int setbrightness(struct sd *sd, s32 val)
	{
	/* val goes from 0 -> 31 */
	return stv06xx_write_bridge(sd, 0x1432, val);
	}

	static int setcontrast(struct sd *sd, s32 val)
	{
	/* Val goes from 0 -> 15 */
	return stv06xx_write_bridge(sd, 0x143a, val \| 0xf0);
	}

	static int setgain(struct sd *sd, u8 gain)
	{
	int err;

	/* Set red, green, blue, gain */
	err = stv06xx_write_bridge(sd, 0x0509, gain);
	if (err < 0)
	return err;

	err = stv06xx_write_bridge(sd, 0x050a, gain);
	if (err < 0)
	return err;

	err = stv06xx_write_bridge(sd, 0x050b, gain);
	if (err < 0)
	return err;

	/* 2 mystery writes */
	err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
	if (err < 0)
	return err;

	return stv06xx_write_bridge(sd, 0x050d, 0x01);
	}

	static int setexposure(struct sd *sd, s16 expo)
	{
	int err;

	err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
	if (err < 0)
	return err;

	return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
	}

	static int st6422_start(struct sd *sd)
	{
	int err;
	struct cam *cam = &sd->gspca_dev.cam;

	if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
	err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
	else
	err = stv06xx_write_bridge(sd, 0x1505, 0x02);
	if (err < 0)
	return err;

	/* commit settings */
	err = stv06xx_write_bridge(sd, 0x143f, 0x01);
	return (err < 0) ? err : 0;
	}

	static int st6422_stop(struct sd *sd)
	{
	struct gspca_dev gspca_dev = (struct gspca_dev )sd;

	gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");

	return 0;
	}