drivers/media/video/gspca/tv8532.c - kernel/msm-4.19 - Gitiles

 /*
  * Quickcam cameras initialization data
  *
  * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
  *
  * 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
  * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  */
 #define MODULE_NAME "tv8532"

 #include "gspca.h"

 MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
 MODULE_DESCRIPTION("TV8532 USB Camera Driver");
 MODULE_LICENSE("GPL");

 /* specific webcam descriptor */
 struct sd {
 	struct gspca_dev gspca_dev;	/* !! must be the first item */

 	__u32 buflen;			/* current length of tmpbuf */
 	__u8 tmpbuf[352 * 288 + 10 * 288];	/* no protection... */
 	__u8 tmpbuf2[352 * 288];		/* no protection... */

 	__u16 brightness;
 	__u16 contrast;

 	__u8 packet;
 };

 /* V4L2 controls supported by the driver */
 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);

 static struct ctrl sd_ctrls[] = {
 #define SD_BRIGHTNESS 0
 	{
 	 {
 	  .id = V4L2_CID_BRIGHTNESS,
 	  .type = V4L2_CTRL_TYPE_INTEGER,
 	  .name = "Brightness",
 	  .minimum = 1,
 	  .maximum = 0x2ff,
 	  .step = 1,
 	  .default_value = 0x18f,
 	  },
 	 .set = sd_setbrightness,
 	 .get = sd_getbrightness,
 	 },
 #define SD_CONTRAST 1
 	{
 	 {
 	  .id = V4L2_CID_CONTRAST,
 	  .type = V4L2_CTRL_TYPE_INTEGER,
 	  .name = "Contrast",
 	  .minimum = 0,
 	  .maximum = 0xffff,
 	  .step = 1,
 	  .default_value = 0x7fff,
 	  },
 	 .set = sd_setcontrast,
 	 .get = sd_getcontrast,
 	 },
 };

 static struct v4l2_pix_format sif_mode[] = {
 	{176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
 		.bytesperline = 176,
 		.sizeimage = 176 * 144,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 1},
 	{352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
 		.bytesperline = 352,
 		.sizeimage = 352 * 288,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 0},
 };

 /*
  * Initialization data: this is the first set-up data written to the
  * device (before the open data).
  */
 #define TESTCLK 0x10		/* reg 0x2c -> 0x12 //10 */
 #define TESTCOMP 0x90		/* reg 0x28 -> 0x80 */
 #define TESTLINE 0x81		/* reg 0x29 -> 0x81 */
 #define QCIFLINE 0x41		/* reg 0x29 -> 0x81 */
 #define TESTPTL 0x14		/* reg 0x2D -> 0x14 */
 #define TESTPTH 0x01		/* reg 0x2E -> 0x01 */
 #define TESTPTBL 0x12		/* reg 0x2F -> 0x0a */
 #define TESTPTBH 0x01		/* reg 0x30 -> 0x01 */
 #define ADWIDTHL 0xe8		/* reg 0x0c -> 0xe8 */
 #define ADWIDTHH 0x03		/* reg 0x0d -> 0x03 */
 #define ADHEIGHL 0x90		/* reg 0x0e -> 0x91 //93 */
 #define ADHEIGHH 0x01		/* reg 0x0f -> 0x01 */
 #define EXPOL 0x8f		/* reg 0x1c -> 0x8f */
 #define EXPOH 0x01		/* reg 0x1d -> 0x01 */
 #define ADCBEGINL 0x44		/* reg 0x10 -> 0x46 //47 */
 #define ADCBEGINH 0x00		/* reg 0x11 -> 0x00 */
 #define ADRBEGINL 0x0a		/* reg 0x14 -> 0x0b //0x0c */
 #define ADRBEGINH 0x00		/* reg 0x15 -> 0x00 */
 #define TV8532_CMD_UPDATE 0x84

 #define TV8532_EEprom_Add 0x03
 #define TV8532_EEprom_DataL 0x04
 #define TV8532_EEprom_DataM 0x05
 #define TV8532_EEprom_DataH 0x06
 #define TV8532_EEprom_TableLength 0x07
 #define TV8532_EEprom_Write 0x08
 #define TV8532_PART_CTRL 0x00
 #define TV8532_CTRL 0x01
 #define TV8532_CMD_EEprom_Open 0x30
 #define TV8532_CMD_EEprom_Close 0x29
 #define TV8532_UDP_UPDATE 0x31
 #define TV8532_GPIO 0x39
 #define TV8532_GPIO_OE 0x3B
 #define TV8532_REQ_RegWrite 0x02
 #define TV8532_REQ_RegRead 0x03

 #define TV8532_ADWIDTH_L 0x0C
 #define TV8532_ADWIDTH_H 0x0D
 #define TV8532_ADHEIGHT_L 0x0E
 #define TV8532_ADHEIGHT_H 0x0F
 #define TV8532_EXPOSURE 0x1C
 #define TV8532_QUANT_COMP 0x28
 #define TV8532_MODE_PACKET 0x29
 #define TV8532_SETCLK 0x2C
 #define TV8532_POINT_L 0x2D
 #define TV8532_POINT_H 0x2E
 #define TV8532_POINTB_L 0x2F
 #define TV8532_POINTB_H 0x30
 #define TV8532_BUDGET_L 0x2A
 #define TV8532_BUDGET_H 0x2B
 #define TV8532_VID_L 0x34
 #define TV8532_VID_H 0x35
 #define TV8532_PID_L 0x36
 #define TV8532_PID_H 0x37
 #define TV8532_DeviceID 0x83
 #define TV8532_AD_SLOPE 0x91
 #define TV8532_AD_BITCTRL 0x94
 #define TV8532_AD_COLBEGIN_L 0x10
 #define TV8532_AD_COLBEGIN_H 0x11
 #define TV8532_AD_ROWBEGIN_L 0x14
 #define TV8532_AD_ROWBEGIN_H 0x15

 static const __u32 tv_8532_eeprom_data[] = {
 /*	add		dataL	   dataM	dataH */
 	0x00010001, 0x01018011, 0x02050014, 0x0305001c,
 	0x040d001e, 0x0505001f, 0x06050519, 0x0705011b,
 	0x0805091e, 0x090d892e, 0x0a05892f, 0x0b050dd9,
 	0x0c0509f1, 0
 };

 static int reg_r(struct gspca_dev *gspca_dev,
 		 __u16 index)
 {
 	usb_control_msg(gspca_dev->dev,
 			usb_rcvctrlpipe(gspca_dev->dev, 0),
 			TV8532_REQ_RegRead,
 			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			0,	/* value */
 			index, gspca_dev->usb_buf, 1,
 			500);
 	return gspca_dev->usb_buf[0];
 }

 /* write 1 byte */
 static void reg_w_1(struct gspca_dev *gspca_dev,
 		  __u16 index, __u8 value)
 {
 	gspca_dev->usb_buf[0] = value;
 	usb_control_msg(gspca_dev->dev,
 			usb_sndctrlpipe(gspca_dev->dev, 0),
 			TV8532_REQ_RegWrite,
 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			0,	/* value */
 			index, gspca_dev->usb_buf, 1, 500);
 }

 /* write 2 bytes */
 static void reg_w_2(struct gspca_dev *gspca_dev,
 		  __u16 index, __u8 val1, __u8 val2)
 {
 	gspca_dev->usb_buf[0] = val1;
 	gspca_dev->usb_buf[1] = val2;
 	usb_control_msg(gspca_dev->dev,
 			usb_sndctrlpipe(gspca_dev->dev, 0),
 			TV8532_REQ_RegWrite,
 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			0,	/* value */
 			index, gspca_dev->usb_buf, 2, 500);
 }

 static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
 {
 	int i = 0;
 	__u8 reg, data0, data1, data2;

 	reg_w_1(gspca_dev, TV8532_GPIO, 0xb0);
 	reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Open);
 /*	msleep(1); */
 	while (tv_8532_eeprom_data[i]) {
 		reg = (tv_8532_eeprom_data[i] & 0xff000000) >> 24;
 		reg_w_1(gspca_dev, TV8532_EEprom_Add, reg);
 		/* msleep(1); */
 		data0 = (tv_8532_eeprom_data[i] & 0x000000ff);
 		reg_w_1(gspca_dev, TV8532_EEprom_DataL, data0);
 		/* msleep(1); */
 		data1 = (tv_8532_eeprom_data[i] & 0x0000ff00) >> 8;
 		reg_w_1(gspca_dev, TV8532_EEprom_DataM, data1);
 		/* msleep(1); */
 		data2 = (tv_8532_eeprom_data[i] & 0x00ff0000) >> 16;
 		reg_w_1(gspca_dev, TV8532_EEprom_DataH, data2);
 		/* msleep(1); */
 		reg_w_1(gspca_dev, TV8532_EEprom_Write, 0);
 		/* msleep(10); */
 		i++;
 	}
 	reg_w_1(gspca_dev, TV8532_EEprom_TableLength, i);
 /*	msleep(1); */
 	reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Close);
 	msleep(10);
 }

 /* this function is called at probe time */
 static int sd_config(struct gspca_dev *gspca_dev,
 		     const struct usb_device_id *id)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct cam *cam;

 	tv_8532WriteEEprom(gspca_dev);

 	cam = &gspca_dev->cam;
 	cam->epaddr = 1;
 	cam->cam_mode = sif_mode;
 	cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];

 	sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
 	sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
 	return 0;
 }

 static void tv_8532ReadRegisters(struct gspca_dev *gspca_dev)
 {
 	__u8 data;

 	data = reg_r(gspca_dev, 0x0001);
 	PDEBUG(D_USBI, "register 0x01-> %x", data);
 	data = reg_r(gspca_dev, 0x0002);
 	PDEBUG(D_USBI, "register 0x02-> %x", data);
 	reg_r(gspca_dev, TV8532_ADWIDTH_L);
 	reg_r(gspca_dev, TV8532_ADWIDTH_H);
 	reg_r(gspca_dev, TV8532_QUANT_COMP);
 	reg_r(gspca_dev, TV8532_MODE_PACKET);
 	reg_r(gspca_dev, TV8532_SETCLK);
 	reg_r(gspca_dev, TV8532_POINT_L);
 	reg_r(gspca_dev, TV8532_POINT_H);
 	reg_r(gspca_dev, TV8532_POINTB_L);
 	reg_r(gspca_dev, TV8532_POINTB_H);
 	reg_r(gspca_dev, TV8532_BUDGET_L);
 	reg_r(gspca_dev, TV8532_BUDGET_H);
 	reg_r(gspca_dev, TV8532_VID_L);
 	reg_r(gspca_dev, TV8532_VID_H);
 	reg_r(gspca_dev, TV8532_PID_L);
 	reg_r(gspca_dev, TV8532_PID_H);
 	reg_r(gspca_dev, TV8532_DeviceID);
 	reg_r(gspca_dev, TV8532_AD_COLBEGIN_L);
 	reg_r(gspca_dev, TV8532_AD_COLBEGIN_H);
 	reg_r(gspca_dev, TV8532_AD_ROWBEGIN_L);
 	reg_r(gspca_dev, TV8532_AD_ROWBEGIN_H);
 }

 static void tv_8532_setReg(struct gspca_dev *gspca_dev)
 {
 	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 			ADCBEGINL);			/* 0x10 */
 	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 			ADCBEGINH);			/* also digital gain */
 	reg_w_1(gspca_dev, TV8532_PART_CTRL,
 			TV8532_CMD_UPDATE);		/* 0x00<-0x84 */

 	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0a);
 	/******************************************************/
 	reg_w_1(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL); /* 0e */
 	reg_w_1(gspca_dev, TV8532_ADHEIGHT_H, ADHEIGHH); /* 0f */
 	reg_w_2(gspca_dev, TV8532_EXPOSURE,
 			EXPOL, EXPOH);			/* 350d 0x014c; 1c */
 	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
 			ADCBEGINL);			/* 0x10 */
 	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
 			ADCBEGINH);			/* also digital gain */
 	reg_w_1(gspca_dev, TV8532_AD_ROWBEGIN_L,
 			ADRBEGINL);			/* 0x14 */

 	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);	/* 0x91 */
 	reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x02);	/* 0x94 */

 	reg_w_1(gspca_dev, TV8532_CTRL,
 			TV8532_CMD_EEprom_Close);	/* 0x01 */

 	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);	/* 0x91 */
 	reg_w_1(gspca_dev, TV8532_PART_CTRL,
 			TV8532_CMD_UPDATE);		/* 0x00<-0x84 */
 }

 static void tv_8532_PollReg(struct gspca_dev *gspca_dev)
 {
 	int i;

 	/* strange polling from tgc */
 	for (i = 0; i < 10; i++) {
 		reg_w_1(gspca_dev, TV8532_SETCLK,
 			TESTCLK);		/* 0x48; //0x08; 0x2c */
 		reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 		reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);	/* 0x31 */
 	}
 }

 /* this function is called at probe and resume time */
 static int sd_init(struct gspca_dev *gspca_dev)
 {
 	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 	reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 	tv_8532ReadRegisters(gspca_dev);
 	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 	reg_w_2(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL,
 				ADHEIGHH);	/* 401d 0x0169; 0e */
 	reg_w_2(gspca_dev, TV8532_EXPOSURE, EXPOL,
 				EXPOH);		/* 350d 0x014c; 1c */
 	reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL);	/* 0x20; 0x0c */
 	reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH);	/* 0x0d */

 	/*******************************************************************/
 	reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 			TESTCOMP);	/* 0x72 compressed mode 0x28 */
 	reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 			TESTLINE);	/* 0x84; // CIF | 4 packet 0x29 */

 	/************************************************/
 	reg_w_1(gspca_dev, TV8532_SETCLK,
 			TESTCLK);		/* 0x48; //0x08; 0x2c */
 	reg_w_1(gspca_dev, TV8532_POINT_L,
 			TESTPTL);		/* 0x38; 0x2d */
 	reg_w_1(gspca_dev, TV8532_POINT_H,
 			TESTPTH);		/* 0x04; 0x2e */
 	reg_w_1(gspca_dev, TV8532_POINTB_L,
 			TESTPTBL);		/* 0x04; 0x2f */
 	reg_w_1(gspca_dev, TV8532_POINTB_H,
 			TESTPTBH);		/* 0x04; 0x30 */
 	reg_w_1(gspca_dev, TV8532_PART_CTRL,
 			TV8532_CMD_UPDATE);	/* 0x00<-0x84 */
 	/*************************************************/
 	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);	/* 0x31 */
 	msleep(200);
 	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);	/* 0x31 */
 	/*************************************************/
 	tv_8532_setReg(gspca_dev);
 	/*************************************************/
 	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 	/*************************************************/
 	tv_8532_setReg(gspca_dev);
 	/*************************************************/
 	tv_8532_PollReg(gspca_dev);
 	return 0;
 }

 static void setbrightness(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	int brightness = sd->brightness;

 	reg_w_2(gspca_dev, TV8532_EXPOSURE,
 		brightness >> 8, brightness);		/* 1c */
 	reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
 }

 /* -- start the camera -- */
 static int sd_start(struct gspca_dev *gspca_dev)
 {
 	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
 	reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
 	tv_8532ReadRegisters(gspca_dev);
 	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 	reg_w_2(gspca_dev, TV8532_ADHEIGHT_L,
 		ADHEIGHL, ADHEIGHH);	/* 401d 0x0169; 0e */
 /*	reg_w_2(gspca_dev, TV8532_EXPOSURE,
 		EXPOL, EXPOH);		 * 350d 0x014c; 1c */
 	setbrightness(gspca_dev);

 	reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL);	/* 0x20; 0x0c */
 	reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH);	/* 0x0d */

 	/************************************************/
 	reg_w_1(gspca_dev, TV8532_QUANT_COMP,
 			TESTCOMP);	/* 0x72 compressed mode 0x28 */
 	if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
 		/* 176x144 */
 		reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 			QCIFLINE);	/* 0x84; // CIF | 4 packet 0x29 */
 	} else {
 		/* 352x288 */
 		reg_w_1(gspca_dev, TV8532_MODE_PACKET,
 			TESTLINE);	/* 0x84; // CIF | 4 packet 0x29 */
 	}
 	/************************************************/
 	reg_w_1(gspca_dev, TV8532_SETCLK,
 			TESTCLK);		/* 0x48; //0x08; 0x2c */
 	reg_w_1(gspca_dev, TV8532_POINT_L,
 			TESTPTL);		/* 0x38; 0x2d */
 	reg_w_1(gspca_dev, TV8532_POINT_H,
 			TESTPTH);		/* 0x04; 0x2e */
 	reg_w_1(gspca_dev, TV8532_POINTB_L,
 			TESTPTBL);		/* 0x04; 0x2f */
 	reg_w_1(gspca_dev, TV8532_POINTB_H,
 			TESTPTBH);		/* 0x04; 0x30 */
 	reg_w_1(gspca_dev, TV8532_PART_CTRL,
 			TV8532_CMD_UPDATE);	/* 0x00<-0x84 */
 	/************************************************/
 	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);	/* 0x31 */
 	msleep(200);
 	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);	/* 0x31 */
 	/************************************************/
 	tv_8532_setReg(gspca_dev);
 	/************************************************/
 	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 	/************************************************/
 	tv_8532_setReg(gspca_dev);
 	/************************************************/
 	tv_8532_PollReg(gspca_dev);
 	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);	/* 0x31 */

 	gspca_dev->empty_packet = 0;		/* check the empty packets */

 	return 0;
 }

 static void sd_stopN(struct gspca_dev *gspca_dev)
 {
 	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
 }

 static void tv8532_preprocess(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 /* we should received a whole frame with header and EOL marker
  * in sd->tmpbuf and return a GBRG pattern in sd->tmpbuf2
  * sequence 2bytes header the Alternate pixels bayer GB 4 bytes
  * Alternate pixels bayer RG 4 bytes EOL */
 	int width = gspca_dev->width;
 	int height = gspca_dev->height;
 	unsigned char *dst = sd->tmpbuf2;
 	unsigned char *data = sd->tmpbuf;
 	int i;

 	/* precompute where is the good bayer line */
 	if (((data[3] + data[width + 7]) >> 1)
 	    + (data[4] >> 2)
 	    + (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1)
 	    + (data[3] >> 2)
 	    + (data[width + 5] >> 1))
 		data += 3;
 	else
 		data += 2;
 	for (i = 0; i < height / 2; i++) {
 		memcpy(dst, data, width);
 		data += width + 3;
 		dst += width;
 		memcpy(dst, data, width);
 		data += width + 7;
 		dst += width;
 	}
 }

 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			struct gspca_frame *frame,	/* target */
 			__u8 *data,			/* isoc packet */
 			int len)			/* iso packet length */
 {
 	struct sd *sd = (struct sd *) gspca_dev;

 	if (data[0] != 0x80) {
 		sd->packet++;
 		if (sd->buflen + len > sizeof sd->tmpbuf) {
 			if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 				PDEBUG(D_PACK, "buffer overflow");
 				gspca_dev->last_packet_type = DISCARD_PACKET;
 			}
 			return;
 		}
 		memcpy(&sd->tmpbuf[sd->buflen], data, len);
 		sd->buflen += len;
 		return;
 	}

 	/* here we detect 0x80 */
 	/* counter is limited so we need few header for a frame :) */

 	/* header 0x80 0x80 0x80 0x80 0x80 */
 	/* packet  00   63  127  145  00   */
 	/* empty    1    0   0    1    1   */

 	/* update sequence */
 	if (sd->packet == 63 || sd->packet == 127)
 		gspca_dev->empty_packet = 0;

 	/* is there a frame start ? */
 	/* (each packet is 2 lines plus 10 bytes) */
 	if (sd->packet >= (gspca_dev->height >> 1) - 1) {
 		PDEBUG(D_PACK, "empty %d packet %d",
 			gspca_dev->empty_packet, sd->packet);
 		if (gspca_dev->empty_packet) {	/* start of frame */
 			if (gspca_dev->last_packet_type == FIRST_PACKET) {
 				tv8532_preprocess(gspca_dev);
 				frame = gspca_frame_add(gspca_dev,
 							LAST_PACKET,
 							frame, sd->tmpbuf2,
 							gspca_dev->height *
 							    gspca_dev->width);
 			}
 			gspca_frame_add(gspca_dev, FIRST_PACKET,
 					frame, data, 0);
 			memcpy(sd->tmpbuf, data, len);
 			sd->buflen = len;
 			sd->packet = 0;
 			return;
 		}
 		if (gspca_dev->last_packet_type != DISCARD_PACKET) {
 			PDEBUG(D_PACK,
 			       "Warning wrong TV8532 frame detection %d",
 			       sd->packet);
 			gspca_dev->last_packet_type = DISCARD_PACKET;
 		}
 		return;
 	}

 	if (gspca_dev->empty_packet) {
 		/* Drop packet frame corrupt */
 		PDEBUG(D_PACK, "DROP empty %d packet %d",
 			gspca_dev->empty_packet, sd->packet);
 		sd->packet = 0;
 		gspca_dev->last_packet_type = DISCARD_PACKET;
 	}
 }

 static void setcontrast(struct gspca_dev *gspca_dev)
 {
 }

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

 	sd->brightness = val;
 	if (gspca_dev->streaming)
 		setbrightness(gspca_dev);
 	return 0;
 }

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

 	*val = sd->brightness;
 	return 0;
 }

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

 	sd->contrast = val;
 	if (gspca_dev->streaming)
 		setcontrast(gspca_dev);
 	return 0;
 }

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

 	*val = sd->contrast;
 	return 0;
 }

 /* sub-driver description */
 static const struct sd_desc sd_desc = {
 	.name = MODULE_NAME,
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
 	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
 	.pkt_scan = sd_pkt_scan,
 };

 /* -- module initialisation -- */
 static const __devinitdata struct usb_device_id device_table[] = {
 	{USB_DEVICE(0x046d, 0x0920)},
 	{USB_DEVICE(0x046d, 0x0921)},
 	{USB_DEVICE(0x0545, 0x808b)},
 	{USB_DEVICE(0x0545, 0x8333)},
 	{USB_DEVICE(0x0923, 0x010f)},
 	{}
 };

 MODULE_DEVICE_TABLE(usb, device_table);

 /* -- device connect -- */
 static int sd_probe(struct usb_interface *intf,
 		    const struct usb_device_id *id)
 {
 	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 			       THIS_MODULE);
 }

 static struct usb_driver sd_driver = {
 	.name = MODULE_NAME,
 	.id_table = device_table,
 	.probe = sd_probe,
 	.disconnect = gspca_disconnect,
 #ifdef CONFIG_PM
 	.suspend = gspca_suspend,
 	.resume = gspca_resume,
 #endif
 };

 /* -- module insert / remove -- */
 static int __init sd_mod_init(void)
 {
 	if (usb_register(&sd_driver) < 0)
 		return -1;
 	PDEBUG(D_PROBE, "registered");
 	return 0;
 }

 static void __exit sd_mod_exit(void)
 {
 	usb_deregister(&sd_driver);
 	PDEBUG(D_PROBE, "deregistered");
 }

 module_init(sd_mod_init);
 module_exit(sd_mod_exit);
	/*
	* Quickcam cameras initialization data
	*
	* V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
	*
	* 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
	* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	*/
	#define MODULE_NAME "tv8532"

	#include "gspca.h"

	MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
	MODULE_DESCRIPTION("TV8532 USB Camera Driver");
	MODULE_LICENSE("GPL");

	/* specific webcam descriptor */
	struct sd {
	struct gspca_dev gspca_dev; /* !! must be the first item */

	__u32 buflen; /* current length of tmpbuf */
	__u8 tmpbuf[352 * 288 + 10 * 288]; /* no protection... */
	__u8 tmpbuf2[352 * 288]; /* no protection... */

	__u16 brightness;
	__u16 contrast;

	__u8 packet;
	};

	/* V4L2 controls supported by the driver */
	static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
	static int sd_getbrightness(struct gspca_dev gspca_dev, __s32 val);
	static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
	static int sd_getcontrast(struct gspca_dev gspca_dev, __s32 val);

	static struct ctrl sd_ctrls[] = {
	#define SD_BRIGHTNESS 0
	{
	{
	.id = V4L2_CID_BRIGHTNESS,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Brightness",
	.minimum = 1,
	.maximum = 0x2ff,
	.step = 1,
	.default_value = 0x18f,
	},
	.set = sd_setbrightness,
	.get = sd_getbrightness,
	},
	#define SD_CONTRAST 1
	{
	{
	.id = V4L2_CID_CONTRAST,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Contrast",
	.minimum = 0,
	.maximum = 0xffff,
	.step = 1,
	.default_value = 0x7fff,
	},
	.set = sd_setcontrast,
	.get = sd_getcontrast,
	},
	};

	static struct v4l2_pix_format sif_mode[] = {
	{176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
	.bytesperline = 176,
	.sizeimage = 176 * 144,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 1},
	{352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
	.bytesperline = 352,
	.sizeimage = 352 * 288,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 0},
	};

	/*
	* Initialization data: this is the first set-up data written to the
	* device (before the open data).
	*/
	#define TESTCLK 0x10 /* reg 0x2c -> 0x12 //10 */
	#define TESTCOMP 0x90 /* reg 0x28 -> 0x80 */
	#define TESTLINE 0x81 /* reg 0x29 -> 0x81 */
	#define QCIFLINE 0x41 /* reg 0x29 -> 0x81 */
	#define TESTPTL 0x14 /* reg 0x2D -> 0x14 */
	#define TESTPTH 0x01 /* reg 0x2E -> 0x01 */
	#define TESTPTBL 0x12 /* reg 0x2F -> 0x0a */
	#define TESTPTBH 0x01 /* reg 0x30 -> 0x01 */
	#define ADWIDTHL 0xe8 /* reg 0x0c -> 0xe8 */
	#define ADWIDTHH 0x03 /* reg 0x0d -> 0x03 */
	#define ADHEIGHL 0x90 /* reg 0x0e -> 0x91 //93 */
	#define ADHEIGHH 0x01 /* reg 0x0f -> 0x01 */
	#define EXPOL 0x8f /* reg 0x1c -> 0x8f */
	#define EXPOH 0x01 /* reg 0x1d -> 0x01 */
	#define ADCBEGINL 0x44 /* reg 0x10 -> 0x46 //47 */
	#define ADCBEGINH 0x00 /* reg 0x11 -> 0x00 */
	#define ADRBEGINL 0x0a /* reg 0x14 -> 0x0b //0x0c */
	#define ADRBEGINH 0x00 /* reg 0x15 -> 0x00 */
	#define TV8532_CMD_UPDATE 0x84

	#define TV8532_EEprom_Add 0x03
	#define TV8532_EEprom_DataL 0x04
	#define TV8532_EEprom_DataM 0x05
	#define TV8532_EEprom_DataH 0x06
	#define TV8532_EEprom_TableLength 0x07
	#define TV8532_EEprom_Write 0x08
	#define TV8532_PART_CTRL 0x00
	#define TV8532_CTRL 0x01
	#define TV8532_CMD_EEprom_Open 0x30
	#define TV8532_CMD_EEprom_Close 0x29
	#define TV8532_UDP_UPDATE 0x31
	#define TV8532_GPIO 0x39
	#define TV8532_GPIO_OE 0x3B
	#define TV8532_REQ_RegWrite 0x02
	#define TV8532_REQ_RegRead 0x03

	#define TV8532_ADWIDTH_L 0x0C
	#define TV8532_ADWIDTH_H 0x0D
	#define TV8532_ADHEIGHT_L 0x0E
	#define TV8532_ADHEIGHT_H 0x0F
	#define TV8532_EXPOSURE 0x1C
	#define TV8532_QUANT_COMP 0x28
	#define TV8532_MODE_PACKET 0x29
	#define TV8532_SETCLK 0x2C
	#define TV8532_POINT_L 0x2D
	#define TV8532_POINT_H 0x2E
	#define TV8532_POINTB_L 0x2F
	#define TV8532_POINTB_H 0x30
	#define TV8532_BUDGET_L 0x2A
	#define TV8532_BUDGET_H 0x2B
	#define TV8532_VID_L 0x34
	#define TV8532_VID_H 0x35
	#define TV8532_PID_L 0x36
	#define TV8532_PID_H 0x37
	#define TV8532_DeviceID 0x83
	#define TV8532_AD_SLOPE 0x91
	#define TV8532_AD_BITCTRL 0x94
	#define TV8532_AD_COLBEGIN_L 0x10
	#define TV8532_AD_COLBEGIN_H 0x11
	#define TV8532_AD_ROWBEGIN_L 0x14
	#define TV8532_AD_ROWBEGIN_H 0x15

	static const __u32 tv_8532_eeprom_data[] = {
	/* add dataL dataM dataH */
	0x00010001, 0x01018011, 0x02050014, 0x0305001c,
	0x040d001e, 0x0505001f, 0x06050519, 0x0705011b,
	0x0805091e, 0x090d892e, 0x0a05892f, 0x0b050dd9,
	0x0c0509f1, 0
	};

	static int reg_r(struct gspca_dev *gspca_dev,
	__u16 index)
	{
	usb_control_msg(gspca_dev->dev,
	usb_rcvctrlpipe(gspca_dev->dev, 0),
	TV8532_REQ_RegRead,
	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	0, /* value */
	index, gspca_dev->usb_buf, 1,
	500);
	return gspca_dev->usb_buf[0];
	}

	/* write 1 byte */
	static void reg_w_1(struct gspca_dev *gspca_dev,
	__u16 index, __u8 value)
	{
	gspca_dev->usb_buf[0] = value;
	usb_control_msg(gspca_dev->dev,
	usb_sndctrlpipe(gspca_dev->dev, 0),
	TV8532_REQ_RegWrite,
	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	0, /* value */
	index, gspca_dev->usb_buf, 1, 500);
	}

	/* write 2 bytes */
	static void reg_w_2(struct gspca_dev *gspca_dev,
	__u16 index, __u8 val1, __u8 val2)
	{
	gspca_dev->usb_buf[0] = val1;
	gspca_dev->usb_buf[1] = val2;
	usb_control_msg(gspca_dev->dev,
	usb_sndctrlpipe(gspca_dev->dev, 0),
	TV8532_REQ_RegWrite,
	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	0, /* value */
	index, gspca_dev->usb_buf, 2, 500);
	}

	static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
	{
	int i = 0;
	__u8 reg, data0, data1, data2;

	reg_w_1(gspca_dev, TV8532_GPIO, 0xb0);
	reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Open);
	/* msleep(1); */
	while (tv_8532_eeprom_data[i]) {
	reg = (tv_8532_eeprom_data[i] & 0xff000000) >> 24;
	reg_w_1(gspca_dev, TV8532_EEprom_Add, reg);
	/* msleep(1); */
	data0 = (tv_8532_eeprom_data[i] & 0x000000ff);
	reg_w_1(gspca_dev, TV8532_EEprom_DataL, data0);
	/* msleep(1); */
	data1 = (tv_8532_eeprom_data[i] & 0x0000ff00) >> 8;
	reg_w_1(gspca_dev, TV8532_EEprom_DataM, data1);
	/* msleep(1); */
	data2 = (tv_8532_eeprom_data[i] & 0x00ff0000) >> 16;
	reg_w_1(gspca_dev, TV8532_EEprom_DataH, data2);
	/* msleep(1); */
	reg_w_1(gspca_dev, TV8532_EEprom_Write, 0);
	/* msleep(10); */
	i++;
	}
	reg_w_1(gspca_dev, TV8532_EEprom_TableLength, i);
	/* msleep(1); */
	reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Close);
	msleep(10);
	}

	/* this function is called at probe time */
	static int sd_config(struct gspca_dev *gspca_dev,
	const struct usb_device_id *id)
	{
	struct sd sd = (struct sd ) gspca_dev;
	struct cam *cam;

	tv_8532WriteEEprom(gspca_dev);

	cam = &gspca_dev->cam;
	cam->epaddr = 1;
	cam->cam_mode = sif_mode;
	cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];

	sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
	sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
	return 0;
	}

	static void tv_8532ReadRegisters(struct gspca_dev *gspca_dev)
	{
	__u8 data;

	data = reg_r(gspca_dev, 0x0001);
	PDEBUG(D_USBI, "register 0x01-> %x", data);
	data = reg_r(gspca_dev, 0x0002);
	PDEBUG(D_USBI, "register 0x02-> %x", data);
	reg_r(gspca_dev, TV8532_ADWIDTH_L);
	reg_r(gspca_dev, TV8532_ADWIDTH_H);
	reg_r(gspca_dev, TV8532_QUANT_COMP);
	reg_r(gspca_dev, TV8532_MODE_PACKET);
	reg_r(gspca_dev, TV8532_SETCLK);
	reg_r(gspca_dev, TV8532_POINT_L);
	reg_r(gspca_dev, TV8532_POINT_H);
	reg_r(gspca_dev, TV8532_POINTB_L);
	reg_r(gspca_dev, TV8532_POINTB_H);
	reg_r(gspca_dev, TV8532_BUDGET_L);
	reg_r(gspca_dev, TV8532_BUDGET_H);
	reg_r(gspca_dev, TV8532_VID_L);
	reg_r(gspca_dev, TV8532_VID_H);
	reg_r(gspca_dev, TV8532_PID_L);
	reg_r(gspca_dev, TV8532_PID_H);
	reg_r(gspca_dev, TV8532_DeviceID);
	reg_r(gspca_dev, TV8532_AD_COLBEGIN_L);
	reg_r(gspca_dev, TV8532_AD_COLBEGIN_H);
	reg_r(gspca_dev, TV8532_AD_ROWBEGIN_L);
	reg_r(gspca_dev, TV8532_AD_ROWBEGIN_H);
	}

	static void tv_8532_setReg(struct gspca_dev *gspca_dev)
	{
	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
	ADCBEGINL); /* 0x10 */
	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
	ADCBEGINH); /* also digital gain */
	reg_w_1(gspca_dev, TV8532_PART_CTRL,
	TV8532_CMD_UPDATE); /* 0x00<-0x84 */

	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0a);
	/******************************************************/
	reg_w_1(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL); /* 0e */
	reg_w_1(gspca_dev, TV8532_ADHEIGHT_H, ADHEIGHH); /* 0f */
	reg_w_2(gspca_dev, TV8532_EXPOSURE,
	EXPOL, EXPOH); /* 350d 0x014c; 1c */
	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
	ADCBEGINL); /* 0x10 */
	reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
	ADCBEGINH); /* also digital gain */
	reg_w_1(gspca_dev, TV8532_AD_ROWBEGIN_L,
	ADRBEGINL); /* 0x14 */

	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00); /* 0x91 */
	reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x02); /* 0x94 */

	reg_w_1(gspca_dev, TV8532_CTRL,
	TV8532_CMD_EEprom_Close); /* 0x01 */

	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00); /* 0x91 */
	reg_w_1(gspca_dev, TV8532_PART_CTRL,
	TV8532_CMD_UPDATE); /* 0x00<-0x84 */
	}

	static void tv_8532_PollReg(struct gspca_dev *gspca_dev)
	{
	int i;

	/* strange polling from tgc */
	for (i = 0; i < 10; i++) {
	reg_w_1(gspca_dev, TV8532_SETCLK,
	TESTCLK); /* 0x48; //0x08; 0x2c */
	reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01); /* 0x31 */
	}
	}

	/* this function is called at probe and resume time */
	static int sd_init(struct gspca_dev *gspca_dev)
	{
	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
	reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
	tv_8532ReadRegisters(gspca_dev);
	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
	reg_w_2(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL,
	ADHEIGHH); /* 401d 0x0169; 0e */
	reg_w_2(gspca_dev, TV8532_EXPOSURE, EXPOL,
	EXPOH); /* 350d 0x014c; 1c */
	reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
	reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */

	/*******************************************************************/
	reg_w_1(gspca_dev, TV8532_QUANT_COMP,
	TESTCOMP); /* 0x72 compressed mode 0x28 */
	reg_w_1(gspca_dev, TV8532_MODE_PACKET,
	TESTLINE); /* 0x84; // CIF \| 4 packet 0x29 */

	/************************************************/
	reg_w_1(gspca_dev, TV8532_SETCLK,
	TESTCLK); /* 0x48; //0x08; 0x2c */
	reg_w_1(gspca_dev, TV8532_POINT_L,
	TESTPTL); /* 0x38; 0x2d */
	reg_w_1(gspca_dev, TV8532_POINT_H,
	TESTPTH); /* 0x04; 0x2e */
	reg_w_1(gspca_dev, TV8532_POINTB_L,
	TESTPTBL); /* 0x04; 0x2f */
	reg_w_1(gspca_dev, TV8532_POINTB_H,
	TESTPTBH); /* 0x04; 0x30 */
	reg_w_1(gspca_dev, TV8532_PART_CTRL,
	TV8532_CMD_UPDATE); /* 0x00<-0x84 */
	/*************************************************/
	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01); /* 0x31 */
	msleep(200);
	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00); /* 0x31 */
	/*************************************************/
	tv_8532_setReg(gspca_dev);
	/*************************************************/
	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
	/*************************************************/
	tv_8532_setReg(gspca_dev);
	/*************************************************/
	tv_8532_PollReg(gspca_dev);
	return 0;
	}

	static void setbrightness(struct gspca_dev *gspca_dev)
	{
	struct sd sd = (struct sd ) gspca_dev;
	int brightness = sd->brightness;

	reg_w_2(gspca_dev, TV8532_EXPOSURE,
	brightness >> 8, brightness); /* 1c */
	reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
	}

	/* -- start the camera -- */
	static int sd_start(struct gspca_dev *gspca_dev)
	{
	reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
	reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
	tv_8532ReadRegisters(gspca_dev);
	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
	reg_w_2(gspca_dev, TV8532_ADHEIGHT_L,
	ADHEIGHL, ADHEIGHH); /* 401d 0x0169; 0e */
	/* reg_w_2(gspca_dev, TV8532_EXPOSURE,
	EXPOL, EXPOH); * 350d 0x014c; 1c */
	setbrightness(gspca_dev);

	reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
	reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */

	/************************************************/
	reg_w_1(gspca_dev, TV8532_QUANT_COMP,
	TESTCOMP); /* 0x72 compressed mode 0x28 */
	if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
	/* 176x144 */
	reg_w_1(gspca_dev, TV8532_MODE_PACKET,
	QCIFLINE); /* 0x84; // CIF \| 4 packet 0x29 */
	} else {
	/* 352x288 */
	reg_w_1(gspca_dev, TV8532_MODE_PACKET,
	TESTLINE); /* 0x84; // CIF \| 4 packet 0x29 */
	}
	/************************************************/
	reg_w_1(gspca_dev, TV8532_SETCLK,
	TESTCLK); /* 0x48; //0x08; 0x2c */
	reg_w_1(gspca_dev, TV8532_POINT_L,
	TESTPTL); /* 0x38; 0x2d */
	reg_w_1(gspca_dev, TV8532_POINT_H,
	TESTPTH); /* 0x04; 0x2e */
	reg_w_1(gspca_dev, TV8532_POINTB_L,
	TESTPTBL); /* 0x04; 0x2f */
	reg_w_1(gspca_dev, TV8532_POINTB_H,
	TESTPTBH); /* 0x04; 0x30 */
	reg_w_1(gspca_dev, TV8532_PART_CTRL,
	TV8532_CMD_UPDATE); /* 0x00<-0x84 */
	/************************************************/
	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01); /* 0x31 */
	msleep(200);
	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00); /* 0x31 */
	/************************************************/
	tv_8532_setReg(gspca_dev);
	/************************************************/
	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
	/************************************************/
	tv_8532_setReg(gspca_dev);
	/************************************************/
	tv_8532_PollReg(gspca_dev);
	reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00); /* 0x31 */

	gspca_dev->empty_packet = 0; /* check the empty packets */

	return 0;
	}

	static void sd_stopN(struct gspca_dev *gspca_dev)
	{
	reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
	}

	static void tv8532_preprocess(struct gspca_dev *gspca_dev)
	{
	struct sd sd = (struct sd ) gspca_dev;
	/* we should received a whole frame with header and EOL marker
	* in sd->tmpbuf and return a GBRG pattern in sd->tmpbuf2
	* sequence 2bytes header the Alternate pixels bayer GB 4 bytes
	* Alternate pixels bayer RG 4 bytes EOL */
	int width = gspca_dev->width;
	int height = gspca_dev->height;
	unsigned char *dst = sd->tmpbuf2;
	unsigned char *data = sd->tmpbuf;
	int i;

	/* precompute where is the good bayer line */
	if (((data[3] + data[width + 7]) >> 1)
	+ (data[4] >> 2)
	+ (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1)
	+ (data[3] >> 2)
	+ (data[width + 5] >> 1))
	data += 3;
	else
	data += 2;
	for (i = 0; i < height / 2; i++) {
	memcpy(dst, data, width);
	data += width + 3;
	dst += width;
	memcpy(dst, data, width);
	data += width + 7;
	dst += width;
	}
	}

	static void sd_pkt_scan(struct gspca_dev *gspca_dev,
	struct gspca_frame frame, / target */
	__u8 data, / isoc packet */
	int len) /* iso packet length */
	{
	struct sd sd = (struct sd ) gspca_dev;

	if (data[0] != 0x80) {
	sd->packet++;
	if (sd->buflen + len > sizeof sd->tmpbuf) {
	if (gspca_dev->last_packet_type != DISCARD_PACKET) {
	PDEBUG(D_PACK, "buffer overflow");
	gspca_dev->last_packet_type = DISCARD_PACKET;
	}
	return;
	}
	memcpy(&sd->tmpbuf[sd->buflen], data, len);
	sd->buflen += len;
	return;
	}

	/* here we detect 0x80 */
	/* counter is limited so we need few header for a frame :) */

	/* header 0x80 0x80 0x80 0x80 0x80 */
	/* packet 00 63 127 145 00 */
	/* empty 1 0 0 1 1 */

	/* update sequence */
	if (sd->packet == 63 \|\| sd->packet == 127)
	gspca_dev->empty_packet = 0;

	/* is there a frame start ? */
	/* (each packet is 2 lines plus 10 bytes) */
	if (sd->packet >= (gspca_dev->height >> 1) - 1) {
	PDEBUG(D_PACK, "empty %d packet %d",
	gspca_dev->empty_packet, sd->packet);
	if (gspca_dev->empty_packet) { /* start of frame */
	if (gspca_dev->last_packet_type == FIRST_PACKET) {
	tv8532_preprocess(gspca_dev);
	frame = gspca_frame_add(gspca_dev,
	LAST_PACKET,
	frame, sd->tmpbuf2,
	gspca_dev->height *
	gspca_dev->width);
	}
	gspca_frame_add(gspca_dev, FIRST_PACKET,
	frame, data, 0);
	memcpy(sd->tmpbuf, data, len);
	sd->buflen = len;
	sd->packet = 0;
	return;
	}
	if (gspca_dev->last_packet_type != DISCARD_PACKET) {
	PDEBUG(D_PACK,
	"Warning wrong TV8532 frame detection %d",
	sd->packet);
	gspca_dev->last_packet_type = DISCARD_PACKET;
	}
	return;
	}

	if (gspca_dev->empty_packet) {
	/* Drop packet frame corrupt */
	PDEBUG(D_PACK, "DROP empty %d packet %d",
	gspca_dev->empty_packet, sd->packet);
	sd->packet = 0;
	gspca_dev->last_packet_type = DISCARD_PACKET;
	}
	}

	static void setcontrast(struct gspca_dev *gspca_dev)
	{
	}

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

	sd->brightness = val;
	if (gspca_dev->streaming)
	setbrightness(gspca_dev);
	return 0;
	}

	static int sd_getbrightness(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;

	*val = sd->brightness;
	return 0;
	}

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

	sd->contrast = val;
	if (gspca_dev->streaming)
	setcontrast(gspca_dev);
	return 0;
	}

	static int sd_getcontrast(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;

	*val = sd->contrast;
	return 0;
	}

	/* sub-driver description */
	static const struct sd_desc sd_desc = {
	.name = MODULE_NAME,
	.ctrls = sd_ctrls,
	.nctrls = ARRAY_SIZE(sd_ctrls),
	.config = sd_config,
	.init = sd_init,
	.start = sd_start,
	.stopN = sd_stopN,
	.pkt_scan = sd_pkt_scan,
	};

	/* -- module initialisation -- */
	static const __devinitdata struct usb_device_id device_table[] = {
	{USB_DEVICE(0x046d, 0x0920)},
	{USB_DEVICE(0x046d, 0x0921)},
	{USB_DEVICE(0x0545, 0x808b)},
	{USB_DEVICE(0x0545, 0x8333)},
	{USB_DEVICE(0x0923, 0x010f)},
	{}
	};

	MODULE_DEVICE_TABLE(usb, device_table);

	/* -- device connect -- */
	static int sd_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	THIS_MODULE);
	}

	static struct usb_driver sd_driver = {
	.name = MODULE_NAME,
	.id_table = device_table,
	.probe = sd_probe,
	.disconnect = gspca_disconnect,
	#ifdef CONFIG_PM
	.suspend = gspca_suspend,
	.resume = gspca_resume,
	#endif
	};

	/* -- module insert / remove -- */
	static int __init sd_mod_init(void)
	{
	if (usb_register(&sd_driver) < 0)
	return -1;
	PDEBUG(D_PROBE, "registered");
	return 0;
	}

	static void __exit sd_mod_exit(void)
	{
	usb_deregister(&sd_driver);
	PDEBUG(D_PROBE, "deregistered");
	}

	module_init(sd_mod_init);
	module_exit(sd_mod_exit);